1
|
Callary SA, Broekhuis D, Barends J, Ramasamy B, Nelissen RGHH, Solomon LB, Kaptein BL. Virtual biomechanical assessment of porous tantalum and custom triflange components in the treatment of patients with acetabular defects and pelvic discontinuity. Bone Joint J 2024; 106-B:74-81. [PMID: 38688495 DOI: 10.1302/0301-620x.106b5.bjj-2023-0852.r1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
Aims The aim of this study was to compare the biomechanical models of two frequently used techniques for reconstructing severe acetabular defects with pelvic discontinuity in revision total hip arthroplasty (THA) - the Trabecular Metal Acetabular Revision System (TMARS) and custom triflange acetabular components (CTACs) - using virtual modelling. Methods Pre- and postoperative CT scans from ten patients who underwent revision with the TMARS for a Paprosky IIIB acetabular defect with pelvic discontinuity were retrospectively collated. Computer models of a CTAC implant were designed from the preoperative CT scans of these patients. Computer models of the TMARS reconstruction were segmented from postoperative CT scans using a semi-automated method. The amount of bone removed, the implant-bone apposition that was achieved, and the restoration of the centre of rotation of the hip were compared between all the actual TMARS and the virtual CTAC implants. Results The median amount of bone removed for TMARS reconstructions was significantly greater than for CTAC implants (9.07 cm3 (interquartile range (IQR) 5.86 to 21.42) vs 1.16 cm3 (IQR 0.42 to 3.53) (p = 0.004). There was no significant difference between the median overall implant-bone apposition between TMARS reconstructions and CTAC implants (54.8 cm2 (IQR 28.2 to 82.3) vs 56.6 cm2 (IQR 40.6 to 69.7) (p = 0.683). However, there was significantly more implant-bone apposition within the residual acetabulum (45.2 cm2 (IQR 28.2 to 72.4) vs 25.5 cm2 (IQR 12.8 to 44.1) (p = 0.001) and conversely significantly less apposition with the outer cortex of the pelvis for TMARS implants compared with CTAC reconstructions (0 cm2 (IQR 0 to 13.1) vs 23.2 cm2 (IQR 16.4 to 30.6) (p = 0.009). The mean centre of rotation of the hip of TMARS reconstructions differed by a mean of 11.1 mm (3 to 28) compared with CTAC implants. Conclusion In using TMARS, more bone is removed, thus achieving more implant-bone apposition within the residual acetabular bone. In CTAC implants, the amount of bone removed is minimal, while the implant-bone apposition is more evenly distributed between the residual acetabulum and the outer cortex of the pelvis. The differences suggest that these implants used to treat pelvic discontinuity might achieve short- and long-term stability through different biomechanical mechanisms.
Collapse
Affiliation(s)
- Stuart A Callary
- Centre for Orthopaedic and Trauma Research, The University of Adelaide, Adelaide, Australia
- Department of Orthopaedics and Trauma, Royal Adelaide Hospital, Adelaide, Australia
| | - Demien Broekhuis
- Department of Orthopaedic Surgery, Leiden University Medical Center, Leiden, The Netherlands
| | | | - Boopalan Ramasamy
- Centre for Orthopaedic and Trauma Research, The University of Adelaide, Adelaide, Australia
- Department of Orthopaedics and Trauma, Royal Adelaide Hospital, Adelaide, Australia
| | - Rob G H H Nelissen
- Department of Orthopaedic Surgery, Leiden University Medical Center, Leiden, The Netherlands
| | - Lucian B Solomon
- Centre for Orthopaedic and Trauma Research, The University of Adelaide, Adelaide, Australia
- Department of Orthopaedics and Trauma, Royal Adelaide Hospital, Adelaide, Australia
| | - Bart L Kaptein
- Department of Orthopaedic Surgery, Leiden University Medical Center, Leiden, The Netherlands
| |
Collapse
|
2
|
Wassilew GI, Zimmerer A, Fischer M, Nonnenmacher L, O'Hara L, Hube R. Reconstruction of Paprosky IIIB acetabular defects with porous tantalum shells and augments using the footing technique. Bone Joint J 2024; 106-B:54-58. [PMID: 38688499 DOI: 10.1302/0301-620x.106b5.bjj-2023-0523.r2] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
Aims The use of a porous metal shell supported by two augments with the 'footing' technique is one solution to manage Paprosky IIIB acetabular defects in revision total hip arthroplasty. The aim of this study was to assess the medium-term implant survival and radiological and clinical outcomes of this technique. Methods We undertook a retrospective, two-centre series of 39 hips in 39 patients (15 male, 24 female) treated with the 'footing' technique for Paprosky IIIB acetabular defects between 2007 and 2020. The median age at the time of surgery was 64.4 years (interquartile range (IQR) 54.4 to 71.0). The median follow-up was 3.9 years (IQR 3.1 to 7.0). Results The cumulative medium-term survival of the acetabular construct was 89%. Two hips (5.1%) required further revision due to shell loosening, one hip (2.6%) due to shell dislocation, and one hip (2.6%) due to infection. The median Harris Hip Score improved significantly from 47 points (IQR 41.5 to 54.9) preoperatively to 80 points (IQR 73.5 to 88.6) at the latest follow-up (p < 0.001). Conclusion The reconstruction of Paprosky IIIB acetabular defects with porous tantalum shells and two augments using the 'footing' technique showed excellent medium-term results. It is a viable option for treating these challenging defects.
Collapse
Affiliation(s)
- Georgi I Wassilew
- Center for Orthopaedics, Trauma Surgery and Rehabilitation Medicine, University Medicine Greifswald, Greifswald, Germany
| | - Alexander Zimmerer
- Diakonieklinikum Stuttgart, Department of Orthopaedic and Trauma Surgery, Orthopädische Klinik Paulinenhilfe, Stuttgart, Germany
| | - Maximilian Fischer
- Center for Orthopaedics, Trauma Surgery and Rehabilitation Medicine, University Medicine Greifswald, Greifswald, Germany
| | - Lars Nonnenmacher
- Center for Orthopaedics, Trauma Surgery and Rehabilitation Medicine, University Medicine Greifswald, Greifswald, Germany
| | - Laurence O'Hara
- Trauma and Orthopaedics, University Hospitals Dorset, Bournemouth, UK
| | - Robert Hube
- Orthopädische Chirurgie München, Munich, Germany
| |
Collapse
|
3
|
Li L, Pan C, Zhang X, Liu W, Zhang T, Liu Y, Li J, Ma Y, Jia C, Liu X, Shi C. Efficacy of cementless porous tantalum tibial components versus cemented tibial components in primary total knee arthroplasty: A meta-analysis. Medicine (Baltimore) 2024; 103:e37697. [PMID: 38579049 PMCID: PMC10994505 DOI: 10.1097/md.0000000000037697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Accepted: 03/01/2024] [Indexed: 04/07/2024] Open
Abstract
BACKGROUND Total knee arthroplasty involves the use of cemented tibial components for fixation. In recent years, cementless porous tantalum tibial components have been increasingly utilized. The aim of this meta-analysis was to compare the efficacy of cementless porous tantalum tibial components with traditional cemented tibial components in terms of postoperative outcomes following total knee arthroplasty. METHODS Relevant literature was retrieved from Cochrane Library, PubMed, Embase, and Web of Science using the search terms "(trabecular metal OR Porous tantalum)" AND "knee" up to July 2023. The weighted mean difference with a 95% confidence interval was used as the effect size measure to evaluate the functional recovery of the knee joint, radiological analysis, complications, and implant revisions between cementless porous tantalum tibial components and traditional cemented tibial components after total knee arthroplasty. Review Manager 5.3 was utilized to conduct a comparative analysis of all included studies. RESULTS Nine studies with a total of 1117 patients were included in this meta-analysis, consisting of 447 patients in the porous tantalum group and 670 patients in the cemented group. Radiological analysis demonstrated that the porous tantalum group had better outcomes than the cemented group (P < .05). The combined results for the 5-year and 10-year follow-ups, range of motion, Western Ontario and McMaster University Osteoarthritis Index, complications, and implant revisions showed no significant differences between the porous tantalum and cemented groups. CONCLUSION The results of the 5-year and 10-year follow-ups indicate that the use of cementless porous tantalum tibial components is comparable to traditional cemented tibial components, with no significant advantages observed. However, at the 5-year follow-up, the porous tantalum group demonstrated a good bone density in the proximal tibia. Future studies with a larger sample size, long-term clinical follow-up, and radiological results are needed to verify the differences between the 2 implants.
Collapse
Affiliation(s)
- Lei Li
- Beijing Chunlizhengda Medical Instruments Co., Ltd, Beijing, China
| | - Chao Pan
- Beijing Chunlizhengda Medical Instruments Co., Ltd, Beijing, China
| | - Xingyan Zhang
- Beijing Chunlizhengda Medical Instruments Co., Ltd, Beijing, China
| | - Wei Liu
- Beijing Chunlizhengda Medical Instruments Co., Ltd, Beijing, China
| | - Tingting Zhang
- Beijing Chunlizhengda Medical Instruments Co., Ltd, Beijing, China
| | - Yufan Liu
- Beijing Chunlizhengda Medical Instruments Co., Ltd, Beijing, China
| | - Jingyi Li
- Beijing Chunlizhengda Medical Instruments Co., Ltd, Beijing, China
| | - Yuhang Ma
- Beijing Chunlizhengda Medical Instruments Co., Ltd, Beijing, China
| | - Chenfan Jia
- Beijing Chunlizhengda Medical Instruments Co., Ltd, Beijing, China
| | - Xinying Liu
- Beijing Chunlizhengda Medical Instruments Co., Ltd, Beijing, China
| | - Chunbao Shi
- Beijing Chunlizhengda Medical Instruments Co., Ltd, Beijing, China
| |
Collapse
|
4
|
Hitz O, Le Baron M, Jacquet C, Argenson JN, Parratte S, Ollivier M, Flecher X. Use of dual mobility cup cemented into a tantalum acetabular shell for hip revision with large bone loss can decrease dislocation risk without increasing the risk of mechanical failure. Orthop Traumatol Surg Res 2024; 110:103739. [PMID: 37918693 DOI: 10.1016/j.otsr.2023.103739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 08/17/2023] [Accepted: 08/28/2023] [Indexed: 11/04/2023]
Abstract
BACKGROUND Porous tantalum components and augments have demonstrated short to midterm fixation stability in acetabular total hip arthroplasty (THA) revision but do not offer a novel option to decrease the postoperative dislocation rate. Recently, dual mobility (DM) cups have gained interest to decrease the prevalence of recurrent hip instability after revision hip arthroplasty, but this issue was not confirmed combined with use of tantalum reconstruction devices. Therefore, we did a retrospective study aiming to: (1) evaluate at a 5-year minimum follow-up period the dislocation rate (and other intra- and postoperative complications), (2) assess radiographic results specifically looking at osseointegration and restoration of the hip center, (3) and also clinical results in a cohort of patients who underwent complex acetabular reconstruction with trabecular metal revision components associated with a cemented DM socket. HYPOTHESIS Using a DM socket cemented in porous tantalum components can reach the low risk of hip dislocation reported with DM components in revision setting without increasing the risk of a mechanical failure. METHODS A cross-sectional study identified 174 THA revision including an acetabular revision. Were excluded 118 revisions with acetabular defects Type 1, 2a or 2B according to Paprosky's classification, as well as 18 hips revised without a dual mobility and 3 patients (3 hips) lost to follow-up. Were thus included in this study 35 hips (35 patients) implanted with uncemented total hip arthroplasty revision using both trabecular metal acetabular cup-cage reconstruction and a cemented DM cup. Seven hips were classified Paprosky types 2C, 15 type 3A and 13 types 3B. Patients were followed with clinical and radiological evaluation regarding dislocation rate, infection, reoperation or re-revision, osseointegration and restoration of the hip center, and functional results according to the Harris hip score and psoas impingement presence. RESULTS At a mean follow-up of 8.1±1.8 years (5.1-12.6), one dislocation was recorded, and one acute deep infection. No patient required a cup re-revision for septic or aseptic loosening. The survivorship at 8years regarding revision for any cause as an endpoint was 96.5% (CI95%: 92-99). Osseointegration of TM implants was analyzed and found no acetabular migration at the last follow-up in the cohort. The mean hip center position was optimized from 48±7mm (37-58) to 34±5mm (29-39) vertically and from 26±5mm (-18-36) to 24±8mm (7-31) horizontally without reaching significance (p=0.1). On the last follow-up X-rays, the mean acetabular inclination was 47̊±9̊ (32̊-61̊). According to the criteria of Hirakawa, 97.1% (34/35) of the hip centers were restored. One cup (2.9%) was more than 5mm proximally from the hip center, and none more than 10mm. Clinical results assessed a Harris Hip Score improved from 36±17 (23-62) preoperatively to 82±15 (69-93) at last follow-up (p<0.0001). Two patients (2/35, 5.7%) complained of psoas impingement. CONCLUSION This study suggests effectiveness of DM cups in association with a tantalum-made acetabular shell for reconstruction of large bone defect in THRs for both solving postoperative instability and aseptic loosening without increasing the re-revision rate for any reason in a midterm follow-up. LEVEL OF EVIDENCE IV; observational study.
Collapse
Affiliation(s)
- Olivier Hitz
- Clinique des Vergers, chemin de la Planche 1, 1217 Meyrin, Switzerland
| | - Marie Le Baron
- Institut du Mouvement et de l'appareil locomoteur, Aix Marseille Université - Assistance publique des Hôpitaux de Marseille, 270, boulevard Sainte-Marguerite, 13009 Marseille, France
| | - Christophe Jacquet
- Institut du Mouvement et de l'appareil locomoteur, Aix Marseille Université - Assistance publique des Hôpitaux de Marseille, 270, boulevard Sainte-Marguerite, 13009 Marseille, France
| | - Jean-Nöel Argenson
- Institut du Mouvement et de l'appareil locomoteur, Aix Marseille Université - Assistance publique des Hôpitaux de Marseille, 270, boulevard Sainte-Marguerite, 13009 Marseille, France
| | - Sebastien Parratte
- Institut du Mouvement et de l'appareil locomoteur, Aix Marseille Université - Assistance publique des Hôpitaux de Marseille, 270, boulevard Sainte-Marguerite, 13009 Marseille, France; International Knee & Joint Centre, Hazza Bin Zayed Street, Intersection with Fatima Bint Mubarak Street Opposite Burjeel Hospital, 46705 Abu Dhabi, United Arab Emirates
| | - Matthieu Ollivier
- Institut du Mouvement et de l'appareil locomoteur, Aix Marseille Université - Assistance publique des Hôpitaux de Marseille, 270, boulevard Sainte-Marguerite, 13009 Marseille, France
| | - Xavier Flecher
- Institut du Mouvement et de l'appareil locomoteur, Aix Marseille Université - Assistance publique des Hôpitaux de Marseille, 270, boulevard Sainte-Marguerite, 13009 Marseille, France.
| |
Collapse
|
5
|
Xu J, Wu D, Ge B, Li M, Yu H, Cao F, Wang W, Zhang Q, Yi P, Wang H, Song L, Liu L, Li J, Zhao D. Selective Laser Melting of the Porous Ta Scaffold with Mg-Doped Calcium Phosphate Coating for Orthopedic Applications. ACS Biomater Sci Eng 2024; 10:1435-1447. [PMID: 38330203 DOI: 10.1021/acsbiomaterials.3c01503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2024]
Abstract
Addressing the repair of large-scale bone defects has become a hot research topic within the field of orthopedics. This study assessed the feasibility and effectiveness of using porous tantalum scaffolds to treat such defects. These scaffolds, manufactured using the selective laser melting (SLM) technology, possessed biomechanical properties compatible with natural bone tissue. To enhance the osteogenesis bioactivity of these porous Ta scaffolds, we applied calcium phosphate (CaP) and magnesium-doped calcium phosphate (Mg-CaP) coatings to the surface of SLM Ta scaffolds through a hydrothermal method. These degradable coatings released calcium and magnesium ions, demonstrating osteogenic bioactivity. Experimental results indicated that the Mg-CaP group exhibited biocompatibility comparable to that of the Ta group in vivo and in vitro. In terms of osteogenesis, both the CaP group and the Mg-CaP group showed improved outcomes compared to the control group, with the Mg-CaP group demonstrating superior performance. Therefore, both CaP and magnesium-CaP coatings can significantly enhance the osseointegration of three-dimensional-printed porous Ta, thereby increasing the surface bioactivity. Overall, the present study introduces an innovative approach for the biofunctionalization of SLM porous Ta, aiming to enhance its suitability as a bone implant material.
Collapse
Affiliation(s)
- Jianfeng Xu
- Department of Orthopaedics, Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, China
| | - Di Wu
- Department of Orthopaedics, Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, China
| | - Bing Ge
- Department of Orthopaedics, Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, China
| | - Maoyuan Li
- Department of Orthopaedics, Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, China
| | - Haiyu Yu
- Department of Orthopaedics, Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, China
| | - Fang Cao
- Department of Orthopaedics, Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, China
| | - Weidan Wang
- Department of Orthopaedics, Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, China
| | - Qing Zhang
- Integrative Laboratory, Zhongshan Hospital of Dalian University, Dalian 116001, China
| | - Pinqiao Yi
- Department of Orthopaedics, Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, China
| | - Haiyao Wang
- Department of Orthopaedics, Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, China
| | - Liqun Song
- Department of Orthopaedics, Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, China
| | - Lingpeng Liu
- Department of Orthopaedics, Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, China
| | - Junlei Li
- Department of Orthopaedics, Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, China
| | - Dewei Zhao
- Department of Orthopaedics, Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, China
| |
Collapse
|
6
|
Jäntti J, Joenathan A, Fugazzola M, Tuppurainen J, Honkanen JTJ, Töyräs J, van Weeren R, Snyder BD, Grinstaff MW, Matikka H, Mäkelä JTA. Cationic tantalum oxide nanoparticle contrast agent for micro computed tomography reveals articular cartilage proteoglycan distribution and collagen architecture alterations. Osteoarthritis Cartilage 2024; 32:299-309. [PMID: 38061579 DOI: 10.1016/j.joca.2023.11.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 11/29/2023] [Accepted: 11/30/2023] [Indexed: 12/17/2023]
Abstract
OBJECTIVE Cationic tantalum oxide nanoparticles (Ta2O5-cNPs), as a newly introduced contrast agent for computed tomography of cartilage, offer quantitative evaluation of proteoglycan (PG) content and biomechanical properties. However, knowledge on the depth-wise impact of cartilage constituents on nanoparticle diffusion, particularly the influence of the collagen network, is lacking. In this study, we aim to establish the depth-dependent relationship between Ta2O5-cNP diffusion and cartilage constituents (PG content, collagen content and network architecture). METHODS Osteochondral samples (n = 30) were harvested from healthy equine stifle joints (N = 15) and the diffusion of 2.55 nm diameter cationic Ta2O5-cNPs into the cartilage was followed with micro computed tomography (µCT) imaging for up to 96 hours. The diffusion-related parameters, Ta2O5-cNP maximum partition (Pmax) and diffusion time constant, were compared against biomechanical and depth-wise structural properties. Biomechanics were assessed using stress-relaxation and sinusoidal loading protocols, whereas PG content, collagen content and collagen network architecture were determined using digital densitometry, Fourier-transform infrared spectroscopy and polarized light microscopy, respectively. RESULTS The Pmax correlates with the depth-wise distribution of PGs (bulk Spearman's ρ = 0.87, p < 0.001). More open collagen network architecture at the superficial zone enhances intake of Ta2O5-cNPs, but collagen content overall decreases the intake. The Pmax values correlate with the equilibrium modulus (ρ = 0.80, p < 0.001) of articular cartilage. CONCLUSION This study establishes the feasibility of Ta2O5-cNPs for the precise and comprehensive identification of biomechanical and structural changes in articular cartilage via contrast-enhanced µCT.
Collapse
Affiliation(s)
- Jiri Jäntti
- Diagnostic Imaging Center, Kuopio University Hospital, Kuopio, Finland; Department of Technical Physics, University of Eastern Finland, Kuopio, Finland.
| | - Anisha Joenathan
- Division of Materials Science, Boston University, Boston, MA, USA
| | - Maria Fugazzola
- Department of Clinical Sciences, Utrecht University, Utrecht, The Netherlands
| | - Juuso Tuppurainen
- Diagnostic Imaging Center, Kuopio University Hospital, Kuopio, Finland; Department of Technical Physics, University of Eastern Finland, Kuopio, Finland
| | | | - Juha Töyräs
- Department of Technical Physics, University of Eastern Finland, Kuopio, Finland; School of Electrical Engineering and Computer Science, The University of Queensland, Brisbane, Australia; Science Service Center, Kuopio University Hospital, Kuopio, Finland
| | - René van Weeren
- Department of Clinical Sciences, Utrecht University, Utrecht, The Netherlands
| | - Brian D Snyder
- Department of Orthopedic Surgery, Boston Children's Hospital, Boston, MA, USA
| | - Mark W Grinstaff
- Division of Materials Science, Boston University, Boston, MA, USA; Departments of Biomedical Engineering and Chemistry, Boston University, Boston, MA, USA
| | - Hanna Matikka
- Diagnostic Imaging Center, Kuopio University Hospital, Kuopio, Finland
| | - Janne T A Mäkelä
- Diagnostic Imaging Center, Kuopio University Hospital, Kuopio, Finland; Department of Technical Physics, University of Eastern Finland, Kuopio, Finland
| |
Collapse
|
7
|
Ma M, Sun H, Yu X, Xin C, Liu J, Guo J, Li M, Tian Y. Designing step-scheme AgI decorated Ta 2O 5-x heterojunctions for boosted photodegradation of organic pollutants. Chemosphere 2024; 350:141020. [PMID: 38141668 DOI: 10.1016/j.chemosphere.2023.141020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Revised: 11/13/2023] [Accepted: 12/20/2023] [Indexed: 12/25/2023]
Abstract
Step-scheme (S-scheme) AgI decorated Ta2O5-x heterojunctions have been designed and synthesized via a combination of solvothermal and chemical deposition methods for enhanced visible-light harvesting and high-performance photocatalysis. The AgI nanoparticles showed great influences on the visible-light absorption and charge separation between AgI and Ta2O5-x microspheres. The experimental results indicated that the as-prepare AgI/Ta2O5-x composites achieved enhanced photocatalytic performance towards tetracycline degradation under visible light, and the AgI/Ta2O5-x-11 sample displayed the highest photocatalytic performance and the maximum rate constant of approximately 0.09483 min-1, which was 7.22 times that of Ta2O5-x microspheres and 2.56 times that of AgI, respectively. The highly enhanced photocatalytic performance was mainly attributed to the construction of S-scheme heterostructure and formation of oxygen vacancies in Ta2O5-x microspheres. In addition, the trapping experimental and DMPO spin-trapping ESR spectra confirmed the ⸱O2- and ⸱OH species as the main radicals during tetracycline degradation. Current work indicates an S-scheme tantalum-based composites for high-performance environmental photocatalysis.
Collapse
Affiliation(s)
- Min Ma
- Henan Key Laboratory of Polyoxometalates Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, Henan, China
| | - Hezheng Sun
- Henan Engineering Research Center of Resource & Energy Recovery from Waste, School of Energy Science and Technology, Henan University, Zhengzhou 450046, China
| | - Xin Yu
- Henan Engineering Research Center of Resource & Energy Recovery from Waste, School of Energy Science and Technology, Henan University, Zhengzhou 450046, China.
| | - Changhui Xin
- Henan Engineering Research Center of Resource & Energy Recovery from Waste, School of Energy Science and Technology, Henan University, Zhengzhou 450046, China
| | - Jing Liu
- Henan Key Laboratory of Polyoxometalates Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, Henan, China
| | - Junmeng Guo
- Key Lab for Special Functional Materials, Ministry of Education, School of Materials Science and Engineering, Henan University, Kaifeng 475004, China
| | - Mingxue Li
- Henan Key Laboratory of Polyoxometalates Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, Henan, China.
| | - Yajie Tian
- Henan Engineering Research Center of Resource & Energy Recovery from Waste, School of Energy Science and Technology, Henan University, Zhengzhou 450046, China.
| |
Collapse
|
8
|
Rajaji U, Saisree S, Sandhya KY, Alshgari RA, Juang RS, Liu TY. Fabrication of a novel tantalum boride/vanadium carbide modified screen-printed carbon electrode for voltammetric determination of pimonidazole in bio-fluids. Mikrochim Acta 2024; 191:112. [PMID: 38286966 DOI: 10.1007/s00604-024-06182-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Accepted: 12/31/2023] [Indexed: 01/31/2024]
Abstract
For the first time, a tumour hypoxia marker detection has been developed using two-dimensional layered composite modified electrodes in biological and environmental samples. The concept of TaB2 and V4C3-based MXene composite materials is not reported hitherto using ball-milling and thermal methods and it remains the potentiality of the present work. The successful formation is confirmed through various characterisation techniques like X-ray crystallography, scanning electron microscopy photoelectron, and impedance spectroscopy. A reliable and repeatable electrochemical sensor based on TaB2@V4C3/SPCE was developed for quick and extremely sensitive detection of pimonidazole by various electroanalytical methods. It has been shown that the modified electrode intensifies the reduction peak current and causes a decrease in the potential for reduction, in comparison with the bare electrode. The proposed sensor for pimonidazole reduction has strong electrocatalytic activity and high sensitivity, as demonstrated by the cyclic voltammetry approach. Under the optimal experimental circumstances, differential pulse voltammetry techniques were utilised for generating the wide linear range (0.02 to 928.51 µM) with a detection limit of 0.0072 µM. The resultant data demonstrates that TaB2@V4C3/SPCE nano-sensor exhibits excellent stability, reliability, and repeatability in the determination of pimonidazole. Additionally, the suggested sensor was successfully used to determine the presence of pimonidazole in several real samples, such as human blood serum, urine, water, and drugs.
Collapse
Affiliation(s)
- Umamaheswari Rajaji
- Department of Materials Engineering, Ming Chi University of Technology, New Taipei City, 243303, Taiwan
- Centre for Applied Research, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences (SIMATS), Chennai, 602105, Tamil Nadu, India
| | - S Saisree
- Department of Chemistry, Indian Institute of Space Science and Technology, Thiruvananthapuram, Kerala, 695 547, India
| | - K Y Sandhya
- Department of Chemistry, Indian Institute of Space Science and Technology, Thiruvananthapuram, Kerala, 695 547, India.
| | - Razan A Alshgari
- Chemistry Department, College of Science, King Saud University, 11451, Riyadh, Saudi Arabia
| | - Ruey-Shin Juang
- Department of Chemical and Materials Engineering, Chang Gung University, 259 Wenhua First Road Guishan, Taoyuan, 33302, Taiwan.
- Division of Nephrology, Department of Internal Medicine, Chang Gung Memorial Hospital, Linkou, Taiwan.
- Department of Safety, Health and Environmental Engineering, Ming Chi University of Technology, New Taipei City, Taishan, 243303, Taiwan.
| | - Ting-Yu Liu
- Department of Materials Engineering, Ming Chi University of Technology, New Taipei City, 243303, Taiwan.
- College of Engineering & Center for Sustainability and Energy Technologies, Chang Gung University, Taoyuan, 33302, Taiwan.
- Department of Chemical Engineering and Materials Science, Yuan Ze University, Taoyuan City, 32003, Taiwan.
| |
Collapse
|
9
|
Wei Z, Shen Z, Deng H, Kuang T, Wang J, Gu Z. Metal-polyphenol networks-modified tantalum plate for craniomaxillofacial reconstruction. Sci Rep 2024; 14:1023. [PMID: 38200230 PMCID: PMC10781789 DOI: 10.1038/s41598-024-51640-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Accepted: 01/08/2024] [Indexed: 01/12/2024] Open
Abstract
Using three-dimensional (3D) printing technology to make the porous tantalum plate and modify its surface. The physicochemical properties, cytocompatibility, antioxidant capacity, and histocompatibility of the modified materials were evaluated to prepare for the repair of craniomaxillofacial bone defects. The porous tantalum plates were 3D printed by selective laser melting technology. Tantalum plates were surface modified with a metal polyphenol network. The surface-modified plates were analyzed for cytocompatibility using thiazolyl blue tetrazolium bromide and live/dead cell staining. The antioxidant capacity of the surface-modified plates was assessed by measuring the levels of intracellular reactive oxygen species, reduced glutathione, superoxide dismutase, and malondialdehyde. The histocompatibility of the plates was evaluated by animal experiments. The results obtained that the tantalum plates with uniform small pores exhibited a high mechanical strength. The surface-modified plates had much better hydrophilicity. In vitro cell experiments showed that the surface-modified plates had higher cytocompatibility and antioxidant capacity than blank tantalum plates. Through subcutaneous implantation in rabbits, the surface-modified plates demonstrated good histocompatibility. Hence, surface-modified tantalum plates had the potential to be used as an implant material for the treatment of craniomaxillofacial bone defects.
Collapse
Affiliation(s)
- Zhengyu Wei
- Department of Otorhinolaryngology Head and Neck Surgery, the Affiliated Lihuili Hospital, Ningbo University, Ningbo, 315040, Zhejiang, China
- Department of Otorhinolaryngology Head and Neck Surgery, Ningbo Medical Centre Lihuili Hospital, Ningbo, 315040, Zhejiang, China
- Health Science Center, Ningbo University, Ningbo, Zhejiang, China
| | - Zhisen Shen
- Department of Otorhinolaryngology Head and Neck Surgery, the Affiliated Lihuili Hospital, Ningbo University, Ningbo, 315040, Zhejiang, China.
- Department of Otorhinolaryngology Head and Neck Surgery, Ningbo Medical Centre Lihuili Hospital, Ningbo, 315040, Zhejiang, China.
- Health Science Center, Ningbo University, Ningbo, Zhejiang, China.
| | - Hongxia Deng
- Department of Otorhinolaryngology Head and Neck Surgery, the Affiliated Lihuili Hospital, Ningbo University, Ningbo, 315040, Zhejiang, China
- Department of Otorhinolaryngology Head and Neck Surgery, Ningbo Medical Centre Lihuili Hospital, Ningbo, 315040, Zhejiang, China
| | - Tairong Kuang
- College of Material Science and Engineering, Zhejiang University of Technology, Hangzhou, Zhejiang, China
| | - Jinggang Wang
- Laboratory of Bio-Based Polymeric Materials Technology and Application of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, Zhejiang, China
| | - Zhipeng Gu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, Sichuan, China
| |
Collapse
|
10
|
Alan HY, ALMisned G, Yilmaz A, Susam LA, Ilik E, Kilic G, Ozturk G, Tuysuz B, Akkus B, Tekin HO. An investigation on protection properties of Tantalum (V) oxide reinforced glass screens on unexposed breast tissue for mammography examinations. Radiography (Lond) 2024; 30:282-287. [PMID: 38041916 DOI: 10.1016/j.radi.2023.11.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 11/16/2023] [Accepted: 11/22/2023] [Indexed: 12/04/2023]
Abstract
INTRODUCTION The utilization of radiation shielding material positioned between the both breasts are crucial for the reduction of glandular dose and the safeguarding of the contralateral breast during mammographic procedures. This study proposes an alternative substance for shielding the contralateral breast from radiation exposure during mammography screening. METHODS In this study, we present an analysis of the shielding effectiveness of transparent glass that has been doped with Tantalum (V) oxide encoded as BTZT6. The evaluation of this shielding material was conducted using the MCNPX code, specifically for the ipsilateral and contralateral breasts. The design of the left and right breast phantoms involved the creation of three-layer heterogeneous breast phantoms, consisting of varying proportions of glandular tissue (25%, 50%, and 75%). The design of BTZT6 and lead-acrylic shielding screens is implemented using the MCNPX code. The comparative analysis of dose outcomes is conducted to assess the protective efficacy of BTZT6 and lead-acrylic shielding screens. RESULTS The utilization of BTZT6 shielding material resulted in a reduction in both breast dose and skin dose exposure when compared to the lead-acrylic shield. CONCLUSION Based on the findings acquired, the utilization of BTZT6 shielding material screens during mammography procedures involving X-rays with energy levels ranging from 26 to 30 keV is associated with a decrease in radiation dose. IMPLICATIONS FOR PRACTICE It can be inferred that the utilization of BTZT6 demonstrates potential efficacy in mitigating excessive radiation exposure to the breasts and facilitating the quantification of glandular doses in mammography procedures.
Collapse
Affiliation(s)
- H Y Alan
- Institute of Nuclear Sciences, Ankara University, 06100, Ankara, Türkey
| | - G ALMisned
- Department of Physics, College of Science, Princess Nourah Bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - A Yilmaz
- Department of Physics, Faculty of Science, Istanbul University, 34134, Istanbul, Türkey
| | - L A Susam
- Department of Physics, Faculty of Science, Istanbul University, 34134, Istanbul, Türkey
| | - E Ilik
- Eskisehir Osmangazi University, Faculty of Science, Department of Physics, TR-26040 Eskisehir, Türkey
| | - G Kilic
- Eskisehir Osmangazi University, Faculty of Science, Department of Physics, TR-26040 Eskisehir, Türkey
| | - G Ozturk
- Department of Physics, Faculty of Science, Istanbul University, 34134, Istanbul, Türkey
| | - B Tuysuz
- Department of Physics, Faculty of Science, Istanbul University, 34134, Istanbul, Türkey
| | - B Akkus
- Department of Physics, Faculty of Science, Istanbul University, 34134, Istanbul, Türkey
| | - H O Tekin
- Department of Medical Diagnostic Imaging, College of Health Sciences, University of Sharjah, 27272, Sharjah, United Arab Emirates; Istinye University, Faculty of Engineering and Natural Sciences, Computer Engineering Department, Istanbul 34396, Türkey.
| |
Collapse
|
11
|
Zhang Y, Du S, Aiyiti W, Teng Y, Jia R, Jiang H. Customized design and biomechanical property analysis of 3D-printed tantalum intervertebral cages. Biomed Mater Eng 2024; 35:99-124. [PMID: 38217572 DOI: 10.3233/bme-230154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2024]
Abstract
BACKGROUND Intervertebral cages used in clinical applications were often general products with standard specifications, which were challenging to match with the cervical vertebra and prone to cause stress shielding and subsidence. OBJECTIVE To design and fabricate customized tantalum (Ta) intervertebral fusion cages that meets the biomechanical requirements of the cervical segment. METHODS The lattice intervertebral cages were customized designed and fabricated by the selective laser melting. The joint and muscle forces of the cervical segment under different movements were analyzed using reverse dynamics method. The stress characteristics of cage, plate, screws and vertebral endplate were analyzed by finite element analysis. The fluid flow behaviors and permeability of three lattice structures were simulated by computational fluid dynamics. Compression tests were executed to investigate the biomechanical properties of the cages. RESULTS Compared with the solid cages, the lattice-filled structures significantly reduced the stress of cages and anterior fixation system. In comparison to the octahedroid and quaddiametral lattice-filled cages, the bitriangle lattice-filled cage had a lower stress shielding rate, higher permeability, and superior subsidence resistance ability. CONCLUSION The inverse dynamics simulation combined with finite element analysis is an effective method to investigate the biomechanical properties of the cervical vertebra during movements.
Collapse
Affiliation(s)
- Yutao Zhang
- School of Mechanical Engineering, Xinjiang University, Urumqi, China
| | - Shu Du
- School of Mechanical Engineering, Xinjiang University, Urumqi, China
| | - Wurikaixi Aiyiti
- School of Mechanical Engineering, Xinjiang University, Urumqi, China
| | - Yong Teng
- Department of Orthopaedics, Hospital of Xinjiang Military Region PLA, Urumqi, China
| | - Ru Jia
- School of Mechanical Engineering, Xinjiang University, Urumqi, China
| | - Houfeng Jiang
- School of Mechanical Engineering, Xinjiang University, Urumqi, China
| |
Collapse
|
12
|
Ferraro M, Puglia F, Della Valle A, Cerbone V, Cicatelli A, Peroni DR, Cecconi D, Misaggi B, La Maida GA. Transforaminal lumbar interbody fusion with a tantalum cage: lumbar lordosis redistribution and sacral slope restoration with a modified posterior technique. J Orthop Traumatol 2023; 24:62. [PMID: 38091159 PMCID: PMC10719190 DOI: 10.1186/s10195-023-00741-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 11/19/2023] [Indexed: 12/17/2023] Open
Abstract
BACKGROUND Transforaminal lumbar interbody fusion (TLIF), a commonly used procedure in spine surgery, has the advantage of a lower incidence of nerve lesions compared to the posterior lumbar interbody fusion (PLIF) technique. The intersomatic arthrodesis has always been carried out with a single tantalum cage normally used for PLIF. Tantalum is a metal that is particularly used in orthopedic surgery. It has a modulus of elasticity similar to marrow and leads to high primary stability of the implant. MATERIALS AND METHODS Our study was a retrospective monocentric observational study evaluating clinical and radiological outcomes of tantalum cages in a modified TLIF technique with posterior instrumentation and autologous and/or homologous posterolateral bone grafting. The aim of the study was to evaluate clinical outcomes and the increase in or redistribution of lumbar lordosis. The intersomatic arthrodesis was always carried out with a single tantalum cage normally used for PLIF to reduce the neurological risk. We retrospectively studied 105 patients who were treated with a modified unilateral TLIF approach by two surgeons between 2013 and 2018. We evaluated the Oswestry Disability Index (ODI), Visual Analogue Scale (VAS) for back pain, global lumbar lordosis, lordosis of L4-sacrum, segmental lordosis of functional motion units that underwent arthrodesis, pelvic tilt, pelvic incidence, and the sacral slope in 77 patients. All patients were suffering from grade III or IV Pfirrmann, instability, or foraminal post-laminectomy stenosis and/or grade I-II degenerative spondylolisthesis or low-grade isthmic spondylolisthesis. They had no significant sagittal imbalance, with a sagittal vertical axis (SVA) of < 5 mm. The average follow-up duration was 30 months. RESULTS We achieved excellent clinical results, with only four cases of failure (5.2%). Moreover, we noticed a statistically significant redistribution of lumbar lordosis, with an average percentage increase in L4-S1 lordosis equal to 19.9% (P < 0.001), an average increase in the L4-S1/Lumbar lordosis (LL) ratio from 0.53 to 0.63 (P < 0.001), and a mean percentage increase in sacral slope equal to 7.6% (P < 0.001). CONCLUSION Thanks to the properties of tantalum, our modified single-portal TLIF technique is a valid surgical solution to obtain a solid arthrodesis and restore the correct lumbar lordosis distribution while reducing neurological complications and the number of failures. LEVEL OF EVIDENCE 4 Trial registration statement: retrospective observational study, no trial registration.
Collapse
Affiliation(s)
- Marcello Ferraro
- Spine Surgery Department, Orthopaedic Institute Gaetano Pini, Via Gaetano Pini, 1, 20121, Milan, Italy
| | - Francesco Puglia
- Spine Surgery Department, Orthopaedic Institute Gaetano Pini, Via Gaetano Pini, 1, 20121, Milan, Italy.
- University of Milan, Milan, Italy.
| | - Andrea Della Valle
- Spine Surgery Department, Orthopaedic Institute Gaetano Pini, Via Gaetano Pini, 1, 20121, Milan, Italy
| | - Vincenzo Cerbone
- Spine Surgery Department, Orthopaedic Institute Gaetano Pini, Via Gaetano Pini, 1, 20121, Milan, Italy
- University of Milan, Milan, Italy
| | - Alfonso Cicatelli
- Spine Surgery Department, Orthopaedic Institute Gaetano Pini, Via Gaetano Pini, 1, 20121, Milan, Italy
- University of Milan, Milan, Italy
| | - Donata Rita Peroni
- Spine Surgery Department, Orthopaedic Institute Gaetano Pini, Via Gaetano Pini, 1, 20121, Milan, Italy
| | - Davide Cecconi
- Spine Surgery Department, Orthopaedic Institute Gaetano Pini, Via Gaetano Pini, 1, 20121, Milan, Italy
| | - Bernardo Misaggi
- Spine Surgery Department, Orthopaedic Institute Gaetano Pini, Via Gaetano Pini, 1, 20121, Milan, Italy
| | - Giovanni Andrea La Maida
- Spine Surgery Department, Orthopaedic Institute Gaetano Pini, Via Gaetano Pini, 1, 20121, Milan, Italy
| |
Collapse
|
13
|
Eder-Halbedl M, Fink A, Pietsch M, Djahani O, Hofmann S. Excellent mid- to long-term survival of tantalum metal cones in a case series of revision knee arthroplasty with severe bony defects. Knee Surg Sports Traumatol Arthrosc 2023; 31:5496-5506. [PMID: 37819600 PMCID: PMC10719141 DOI: 10.1007/s00167-023-07593-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2023] [Accepted: 09/11/2023] [Indexed: 10/13/2023]
Abstract
PURPOSE Severe metaphyseal bone defects remain a challenge and represent a growing problem in revision total knee arthroplasty (RTKA). The purpose of this study was to examine the survival of first-generation tantalum metal cones (TMC) and to assess clinical and radiographic data obtained from mid- to long-term follow-ups (FU) after RTKA with severe bony defects. METHODS This retrospective case series included 100 consecutive patients of the same centre, who underwent RTKA surgery with TMC for tibia and/or femur bone defects between January 2011 and December 2015. Fourteen patients had died and six were lost for FU, leaving a total of eighty patients (one hundred and twelve TMC) for final evaluation. Clinical parameters including the Knee Society Score (KSS), visual analogue scale (VAS), Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) and range of motion (ROM) were determined preoperatively based on the patients' medical charts, and assessed again during the final FU after an average of 6.1 (5-9) years postoperative. Standardised postoperative X-rays were analysed during the final FU visit for osseointegration of the cones, and any signs of implant loosening were assessed with the modified Knee Society Radiographic review criteria. Perioperative and postoperative complications, reoperations, as well as implant and cone re-revisions were analysed. Survivorship analysis was performed with (a) cone-related revision for any reason and (b) implant component revision for any reason. RESULTS Previous RTKA had to be performed due to 64 (80%) aseptic and 16 (20%) septic failures. At the final FU, 75 (94%) tibia and 76 (95%) femur TMCs and implants were clinically stable. One patient experienced loosening of cones and implants at the femur and tibia but denied re-revision surgery. There were eight (10%) reoperations including two early wound healing problems, two inlay changes, two periprosthetic fractures, one debridement, antibiotics and implant retention (DAIR), and one secondary patella replacement. The six (7.5%) re-revisions included two aseptic loosening's of the opposite implant without TMC, one arthrodesis for recurrent instability, and three deep infections managed by two two-stage exchanges, and one amputation for persistent infection. At re-revision, all TMC cones were osteointegrated without signs of loosening. The determined clinical parameters showed significant (p < 0.001) postoperative improvement, and objective KSS was rated as excellent in 51%, and as good in 22% of patients at the final FU. The estimated 8-year Kaplan-Meier survival was 95% for TMC and 92.5% for implant components. CONCLUSION Tantalum metal cones (TMC) demonstrate a secure fixation for treatment of severe femoral and tibial metaphyseal bone defects during RTKA. This fixation concept showed excellent mid- to long-term clinical and radiographic outcomes with promising 8-year survival rates for cones and implant components. LEVEL OF EVIDENCE Retrospective cohort study, Level IV.
Collapse
Affiliation(s)
- Michael Eder-Halbedl
- Department of Orthopedics and Traumatology, LKH Feldbach-Fürstenfeld, Ottokar-Kernstock-Straße 18, 8330, Feldbach, Austria.
| | - Andrea Fink
- Department of Orthopedics and Traumatology, Medical University of Graz, Auenbruggerplatz 5, 8036, Graz, Austria
| | - Martin Pietsch
- Department of Orthopedics, LKH-Murtal, Stolzalpe, Stolzalpe 38, 8852, Murau, Austria
| | - Oliver Djahani
- Department of Orthopedics, LKH-Murtal, Stolzalpe, Stolzalpe 38, 8852, Murau, Austria
| | - Siegfried Hofmann
- Department of Orthopedics and Traumatology, Medical University of Graz, Auenbruggerplatz 5, 8036, Graz, Austria
- Department of Orthopedics, LKH-Murtal, Stolzalpe, Stolzalpe 38, 8852, Murau, Austria
| |
Collapse
|
14
|
Bellova P, Reich MC, Grothe T, Günther KP, Stiehler M, Goronzy J. Treatment of Severe Acetabular Defects With an Antiprotrusio Cage and Trabecular Metal Augments - Clinical and Radiographic Results After a Mean Follow-Up of 6.6 Years. J Arthroplasty 2023; 38:2415-2422. [PMID: 37271233 DOI: 10.1016/j.arth.2023.05.054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/05/2022] [Revised: 05/18/2023] [Accepted: 05/20/2023] [Indexed: 06/06/2023] Open
Abstract
BACKGROUND Large acetabular bone defects present a serious challenge in revision total hip arthroplasty. The off-label use of antiprotrusio cages in combination with tantalum augments is a promising treatment option in these difficult situations. METHODS Between 2008 and 2013, 100 consecutive patients underwent acetabular cup revision with a cage-augment combination in Paprosky 2 and 3 defect types (including pelvic discontinuities). There were 59 patients available for follow-up. The primary endpoint was the explantation of the cage-and-augment construct. The secondary endpoint was acetabular cup revision for any reason. Also, radiographic and functional outcomes (Western Ontario and McMaster Universities Osteoarthritis Index, Harris Hip Score) were evaluated. Implant survival rates were determined using a Kaplan-Meier analysis. The significance level was set at P < .05. RESULTS Explantation-free survivorship of the "Cage-and-Augment" system was 91.9% after a mean follow-up of 6.2 years (range, 0 to 12.8). All 6 explantations were due to periprosthetic joint infection (PJI). The overall revision-free implant survival rate was 85.7%, including 6 additional liner revisions due to instability. In addition, 6 early PJI occurred, which were successfully treated with debridement, irrigation, and implant retention. We did observe one patient who had radiographic loosening of the construct without necessity for treatment. CONCLUSION The combination of an antiprotrusio cage with tantalum augments is a promising technique in treating large acetabular defects. A major risk of PJI and instability due to large bone and soft tissue defects needs special attention.
Collapse
Affiliation(s)
- Petri Bellova
- Center of Orthopaedics and Traumatology, University Hospital Carl Gustav Carus, Dresden, Germany
| | | | - Tim Grothe
- Center of Orthopaedics and Traumatology, University Hospital Carl Gustav Carus, Dresden, Germany
| | - Klaus-Peter Günther
- Center of Orthopaedics and Traumatology, University Hospital Carl Gustav Carus, Dresden, Germany
| | - Maik Stiehler
- Center of Orthopaedics and Traumatology, University Hospital Carl Gustav Carus, Dresden, Germany
| | - Jens Goronzy
- Center of Orthopaedics and Traumatology, University Hospital Carl Gustav Carus, Dresden, Germany
| |
Collapse
|
15
|
Bougaud E, Canovas F, Hamoui M, Dagneaux L. Combined structural allograft and tantalum cone to manage segmental metaphyseal tibial bone defect in revision knee arthroplasty. Orthop Traumatol Surg Res 2023; 109:103606. [PMID: 36963661 DOI: 10.1016/j.otsr.2023.103606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 01/20/2023] [Accepted: 02/06/2023] [Indexed: 03/26/2023]
Abstract
Tibial bone defect remains a challenge in revision knee arthroplasty. The present innovative technique combines structural allograft and tantalum metaphyseal cone for treatment of AORI stage 2A and 2B (uncontained peripheral metaphyseal) tibial defect. The aim is to reconstitute bone stock and enhance allograft osseointegration, while limiting stress to the allograft by implanting the metaphyseal cone through the allograft and the original bone. LEVEL OF EVIDENCE: V (expert opinion).
Collapse
Affiliation(s)
- Elias Bougaud
- Department of Orthopaedic Surgery, Lower Limb Surgery Unit, Lapeyronie University Hospital, Montpellier University, 371, avenue Gaston-Giraud, 34295 Montpellier cedex 05, France.
| | - François Canovas
- Department of Orthopaedic Surgery, Lower Limb Surgery Unit, Lapeyronie University Hospital, Montpellier University, 371, avenue Gaston-Giraud, 34295 Montpellier cedex 05, France.
| | - Mazen Hamoui
- Department of Orthopaedic Surgery, Lower Limb Surgery Unit, Lapeyronie University Hospital, Montpellier University, 371, avenue Gaston-Giraud, 34295 Montpellier cedex 05, France.
| | - Louis Dagneaux
- Department of Orthopaedic Surgery, Lower Limb Surgery Unit, Lapeyronie University Hospital, Montpellier University, 371, avenue Gaston-Giraud, 34295 Montpellier cedex 05, France.
| |
Collapse
|
16
|
Awwad GEH, Ahedi H, Angadi D, Kandhari V, Coolican MRJ. A prospective randomised controlled trial of cemented and uncemented tibial baseplates: functional and radiological outcomes. Arch Orthop Trauma Surg 2023; 143:5891-5899. [PMID: 37000266 DOI: 10.1007/s00402-023-04831-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Accepted: 02/28/2023] [Indexed: 04/01/2023]
Abstract
INTRODUCTION With the success of uncemented fixation in younger patients undergoing total hip arthroplasty and the growing demand for total knee arthroplasty (TKA) in a younger cohort of patients, there has been an increasing interest in cementless tibial baseplate fixation. We sought to determine whether there was a clear advantage to the use of three different forms of tibial baseplate fixation. The primary outcome of this study was survivorship and secondary outcomes were functional and radiological outcomes, up until 10 years. MATERIALS AND METHODS We conducted a randomised controlled trial and recruited 224 patients with 274 knees. Patients underwent TKA by a single surgeon utilising a standard surgical technique. All patients received a cruciate retaining TKA with a cementless femoral component, and were randomised to receive either a cemented tibial component, a pegged porous coated cementless tibial component with screws or a cementless tantalum monoblock tibial component with pegs. Patient reported outcome measures (PROMS), radiological data and survivorship were assessed until 10 years post-operatively. RESULTS Pre-operative range of motion, alignment and PROMS were similar between the three groups. The use of cemented, cementless with screws or cementless with pegs fixation options, lead to differences in functional outcomes. There was greater improvement in the Oxford score and Knee Society Score in patients who received a cemented baseplate compared to tantalum and the pegged porous groups. However, radiological and survival outcomes were similar in all three groups. Overall survivorship was 99.6%, with one knee with cementless tibial fixation and screws revised for subsidence at 3 years. There were no cases of venous thromboembolism, periprosthetic fracture or infection. CONCLUSIONS Irrespective of tibial fixation method, functional and radiological outcomes remain similar at follow-up at 10 years, with no clear difference in outcome between each group. Each method of fixation also had excellent survivorship over this period and should reassure surgeons that whichever method of fixation they choose, long-term outcomes are likely to be satisfactory.
Collapse
Affiliation(s)
- George E H Awwad
- Sydney Orthopaedic Research Institute, Sydney, Australia.
- Flinders Medical Centre, Adelaide, Australia.
| | - H Ahedi
- Sydney Orthopaedic Research Institute, Sydney, Australia
- University of Tasmania, Tasmania, Australia
| | - D Angadi
- Sydney Orthopaedic Research Institute, Sydney, Australia
| | - V Kandhari
- Sydney Orthopaedic Research Institute, Sydney, Australia
| | - M R J Coolican
- Sydney Orthopaedic Research Institute, Sydney, Australia
- Royal Northshore Hospital, Sydney, Australia
| |
Collapse
|
17
|
Algehyne EA, Ahammad NA, Elnair ME, Zidan M, Alhusayni YY, El-Bashir BO, Saeed A, Alshomrani AS, Alzahrani F. Entropy optimization and response surface methodology of blood hybrid nanofluid flow through composite stenosis artery with magnetized nanoparticles (Au-Ta) for drug delivery application. Sci Rep 2023; 13:9856. [PMID: 37330555 PMCID: PMC10276882 DOI: 10.1038/s41598-023-36931-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Accepted: 06/13/2023] [Indexed: 06/19/2023] Open
Abstract
Entropy creation by a blood-hybrid nanofluid flow with gold-tantalum nanoparticles in a tilted cylindrical artery with composite stenosis under the influence of Joule heating, body acceleration, and thermal radiation is the focus of this research. Using the Sisko fluid model, the non-Newtonian behaviour of blood is investigated. The finite difference (FD) approach is used to solve the equations of motion and entropy for a system subject to certain constraints. The optimal heat transfer rate with respect to radiation, Hartmann number, and nanoparticle volume fraction is calculated using a response surface technique and sensitivity analysis. The impacts of significant parameters such as Hartmann number, angle parameter, nanoparticle volume fraction, body acceleration amplitude, radiation, and Reynolds number on the velocity, temperature, entropy generation, flow rate, shear stress of wall, and heat transfer rate are exhibited via the graphs and tables. Present results disclose that the flow rate profile increase by improving the Womersley number and the opposite nature is noticed in nanoparticle volume fraction. The total entropy generation reduces by improving radiation. The Hartmann number expose a positive sensitivity for all level of nanoparticle volume fraction. The sensitivity analysis revealed that the radiation and nanoparticle volume fraction showed a negative sensitivity for all magnetic field levels. It is seen that the presence of hybrid nanoparticles in the bloodstream leads to a more substantial reduction in the axial velocity of blood compared to Sisko blood. An increase in the volume fraction results in a noticeable decrease in the volumetric flow rate in the axial direction, while higher values of infinite shear rate viscosity lead to a significant reduction in the magnitude of the blood flow pattern. The blood temperature exhibits a linear increase with respect to the volume fraction of hybrid nanoparticles. Specifically, utilizing a hybrid nanofluid with a volume fraction of 3% leads to a 2.01316% higher temperature compared to the base fluid (blood). Similarly, a 5% volume fraction corresponds to a temperature increase of 3.45093%.
Collapse
Affiliation(s)
- Ebrahem A Algehyne
- Department of Mathematics, Faculty of Science, University of Tabuk, P.O.Box.741, Tabuk, 71491, Saudi Arabia.
| | - N Ameer Ahammad
- Department of Mathematics, Faculty of Science, University of Tabuk, P.O.Box.741, Tabuk, 71491, Saudi Arabia.
| | - Mohamed E Elnair
- Department of Mathematics, Faculty of Science, University of Tabuk, P.O.Box.741, Tabuk, 71491, Saudi Arabia
| | - Mohamed Zidan
- Department of Mathematics, Faculty of Science, University of Tabuk, P.O.Box.741, Tabuk, 71491, Saudi Arabia
| | - Yasir Y Alhusayni
- Department of Mathematics, Faculty of Science, University of Tabuk, P.O.Box.741, Tabuk, 71491, Saudi Arabia
| | - B O El-Bashir
- Department of Physics, Faculty of Science, University of Tabuk, P.O.Box.741, Tabuk, 71491, Saudi Arabia
| | - Anwar Saeed
- Centre of Excellence in Theoretical and Computational Science (TaCS-CoE), Faculty of Science, King Mongkut's University of Technology, Thonburi (KMUTT), Bangkok, Thailand
| | - Ali Saleh Alshomrani
- Mathematical Modelling and Applied Computation Research Group (MMAC), Department of Mathematics, King Abdul Aziz University, Jeddah, Saudi Arabia
| | - Faris Alzahrani
- Mathematical Modelling and Applied Computation Research Group (MMAC), Department of Mathematics, King Abdul Aziz University, Jeddah, Saudi Arabia
| |
Collapse
|
18
|
Johannsen F, Konradsen L, Hansen P, Brinch S, Nybing JU, Krogsgaard MR. The Effect of Endoscopic Partial Plantar Fasciotomy on Morphologic and Functional Properties of the Foot. Foot Ankle Int 2023; 44:415-423. [PMID: 37002598 DOI: 10.1177/10711007231160741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
BACKGROUND The lifetime risk of plantar fasciitis is 10%, and operative treatment in the form of endoscopic partial plantar fascia release are often performed in cases refractory for nonsurgical treatment. The effect of the operation on the biomechanical properties of the foot has only been sparsely studied. METHODS This is a prospective, observational study of 25 patients with plantar fasciitis, for a minimum of 3 months, verified by ultrasonographic scanning, who had endoscopic partial fasciotomy. A bony spur was resected if present. At the calcaneal insertion, the medial half of the central band of the plantar fascia was excised in full thickness. The biomechanical properties of the foot were evaluated before surgery and 12 months postoperatively. RESULTS Foot length increased 0.17 cm (P = .03), the width of the central zone 0.35 cm (P = .019), the modified arch index 0.05 (P = .032), and the Foot Posture Index 1.0 (P = .0014). There were no significant changes in rearfoot eversion angle, ankle dorsiflexion and jump distance, or in magnetic resonance imaging-measured 3D navicular position from pre- to postoperation, with or without loading, and no changes in ultrasonographically measured heel pad thickness. A tantalum bead (0.7-mm-diameter) was inserted during operation into the most proximal part of the released medial plantar fascia. Radiographs obtained few days postoperatively and 1 year later revealed no changes in the tantalum-calcaneus distance in supine position, but an increase from 48.3 to 50.7 mm (P = .045) in one-leg standing, suggesting a higher flexibility of the remaining fascia. Patients with a body mass index above and below 27.0 demonstrated no significant differences in any of the assessments at 12 months. CONCLUSION There were minimal changes in the measured foot morphologic and functional properties at 1-year follow-up, after endoscopic partial plantar fascia release. LEVEL OF EVIDENCE Level II, prospective cohort study.
Collapse
Affiliation(s)
- Finn Johannsen
- Department of Orthopedic Surgery, Institute of Sports Medicine, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark
- Furesø-Reumatologerne, Private Rheumatology Clinic, Farum, Denmark
| | - Lars Konradsen
- Section for sports Traumatology, Department of Orthopedic Surgery, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark
| | - Philip Hansen
- Department of Radiology, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark
| | - Signe Brinch
- Department of Radiology, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark
| | - Janus Uhd Nybing
- Department of Radiology, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark
| | - Michael Rindom Krogsgaard
- Section for sports Traumatology, Department of Orthopedic Surgery, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark
| |
Collapse
|
19
|
Li T, Gao M, Wu Z, Yang J, Mo B, Yu S, Gong X, Liu J, Wang W, Luo S, Li R. Tantalum-Zirconium Co-Doped Metal-Organic Frameworks Sequentially Sensitize Radio-Radiodynamic-Immunotherapy for Metastatic Osteosarcoma. Adv Sci (Weinh) 2023; 10:e2206779. [PMID: 36739599 PMCID: PMC10074130 DOI: 10.1002/advs.202206779] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 01/03/2023] [Indexed: 06/18/2023]
Abstract
Due to radiation resistance and the immunosuppressive microenvironment of metastatic osteosarcoma, novel radiosensitizers that can sensitize radiotherapy (RT) and antitumor immunity synchronously urgently needed. Here, the authors developed a nanoscale metal-organic framework (MOF, named TZM) by co-doping high-atomic elements Ta and Zr as metal nodes and porphyrinic molecules (tetrakis(4-carboxyphenyl)porphyrin (TCPP)) as a photosensitizing ligand. Given the 3D arrays of ultra-small heavy metals, porous TZM serves as an efficient attenuator absorbing X-ray energy and sensitizing hydroxyl radical generation for RT. Ta-Zr co-doping narrowed the highest occupied molecular orbital-lowest unoccupied molecular orbital (HOMO-LUMO) energy gap and exhibited close energy levels between the singlet and triplet photoexcited states, facilitating TZM transfer energy to the photosensitizer TCPP to sensitize singlet oxygen (1 O2 ) generation for radiodynamic therapy (RDT). The sensitized RT-RDT effects of TZM elicit a robust antitumor immune response by inducing immunogenic cell death, promoting dendritic cell maturation, and upregulating programmed cell death protein 1 (PD-L1) expression via the cGAS-STING pathway. Furthermore, a combination of TZM, X-ray, and anti-PD-L1 treatments amplify antitumor immunotherapy and efficiently arrest osteosarcoma growth and metastasis. These results indicate that TZM is a promising radiosensitizer for the synergistic RT and immunotherapy of metastatic osteosarcoma.
Collapse
Affiliation(s)
- Tao Li
- Institute of Combined InjuryState Key Laboratory of TraumaBurns and Combined InjuryChongqing Engineering Research Center for NanomedicineCollege of Preventive MedicineThird Military Medical University (Army Medical University)Chongqing400038China
- Center for Joint SurgerySouthwest HospitalThird Military Medical University (Army Medical University)Chongqing400038China
| | - Mingquan Gao
- Institute of Combined InjuryState Key Laboratory of TraumaBurns and Combined InjuryChongqing Engineering Research Center for NanomedicineCollege of Preventive MedicineThird Military Medical University (Army Medical University)Chongqing400038China
- Department of Radiation OncologySichuan Cancer Hospital & InstituteSichuan Key Laboratory of Radiation OncologyChengduSichuan610041China
| | - Zifei Wu
- Institute of Combined InjuryState Key Laboratory of TraumaBurns and Combined InjuryChongqing Engineering Research Center for NanomedicineCollege of Preventive MedicineThird Military Medical University (Army Medical University)Chongqing400038China
- Department of Radiation OncologySichuan Cancer Hospital & InstituteSichuan Key Laboratory of Radiation OncologyChengduSichuan610041China
| | - Junjun Yang
- Center for Joint SurgerySouthwest HospitalThird Military Medical University (Army Medical University)Chongqing400038China
| | - Banghui Mo
- Department of OncologySouthwest HospitalThird Military Medical University (Army Medical University)Chongqing400038China
| | - Songtao Yu
- Department of OncologySouthwest HospitalThird Military Medical University (Army Medical University)Chongqing400038China
| | - Xiaoyuan Gong
- Center for Joint SurgerySouthwest HospitalThird Military Medical University (Army Medical University)Chongqing400038China
| | - Jing Liu
- Institute of Combined InjuryState Key Laboratory of TraumaBurns and Combined InjuryChongqing Engineering Research Center for NanomedicineCollege of Preventive MedicineThird Military Medical University (Army Medical University)Chongqing400038China
| | - Weidong Wang
- Department of Radiation OncologySichuan Cancer Hospital & InstituteSichuan Key Laboratory of Radiation OncologyChengduSichuan610041China
| | - Shenglin Luo
- Institute of Combined InjuryState Key Laboratory of TraumaBurns and Combined InjuryChongqing Engineering Research Center for NanomedicineCollege of Preventive MedicineThird Military Medical University (Army Medical University)Chongqing400038China
| | - Rong Li
- Institute of Combined InjuryState Key Laboratory of TraumaBurns and Combined InjuryChongqing Engineering Research Center for NanomedicineCollege of Preventive MedicineThird Military Medical University (Army Medical University)Chongqing400038China
| |
Collapse
|
20
|
Macháček J, Schlossarek M, Lindagato P. The Livelihood of Artisanal and Small-Scale Miners and Awareness of the Use of 3T Minerals in Rwanda-A Case Study in the Rutsiro District: A Qualitative Assessment. Int J Environ Res Public Health 2022; 19:12570. [PMID: 36231870 PMCID: PMC9566235 DOI: 10.3390/ijerph191912570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 09/25/2022] [Accepted: 09/27/2022] [Indexed: 06/16/2023]
Abstract
This article examines the impact of artisanal and small-scale mining (ASM) on livelihood in mining communities in Rwanda (Rutsiro) where wolframite and coltan are mined. The paper discusses the development of ASM and other entrepreneur activities, in particular agriculture. With ASM activities, there is environmental degradation on the one hand but also an improvement in the well-being of the local population on the other. The 3T (tin, tungsten, tantalum) minerals extracted by ASM are used in the electronics industry for products such as smartphones, tablets, and laptops, which are mainly consumed in the developed world. Based on questionnaires and structured research with miners, it was determined how ASM affects their lives, or whether there is a deterioration or improvement in their well-being. The research builds on previous field research in Rwanda. Because of mining, communities in the mining areas have access to health care, they can pay tuition fees, insurance, etc. On the other hand, the lives of miners are endangered by respiratory diseases, accidents in mines, landslides in mining areas, and other negative environmental impacts. The extraction of these minerals, however, may lead to a worse quality of life for the miners responsible for the extraction in developing countries. This different view is also illustrated by the fact that miners themselves often do not know what 3T minerals are used for. ASM benefits miners from an economic perspective but may worsen their quality of life due to unsuitable working conditions. This study covers a broader understanding of socioeconomic impacts of ASM and tries to point out the lack of awareness about the mining of minerals important for the daily use of modern technologies. This article would like to contribute to the larger debate about the lack of awareness of the origin of 3T minerals.
Collapse
Affiliation(s)
- Jan Macháček
- Department of Social Geography and Regional Development, Faculty of Science, University of Ostrava, 710 00 Ostrava, Czech Republic
| | - Martin Schlossarek
- Department of Development and Environmental Studies, Faculty of Science, Palacky University Olomouc, 771 47 Olomouc, Czech Republic
| | - Philemon Lindagato
- School of Earth Science and Resources, Chang’an University, Xi’an 710054, China
| |
Collapse
|
21
|
Sikander A, Kelly S, Kuchta K, Sievers A, Willner T, Hursthouse AS. Chemical and Microbial Leaching of Valuable Metals from PCBs and Tantalum Capacitors of Spent Mobile Phones. Int J Environ Res Public Health 2022; 19:ijerph191610006. [PMID: 36011640 PMCID: PMC9408593 DOI: 10.3390/ijerph191610006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 08/01/2022] [Accepted: 08/11/2022] [Indexed: 05/25/2023]
Abstract
We compared chemical and microbial leaching for multi-metal extraction from printed circuit boards (PCBs) and tantalum capacitor scrap. A mixed consortium of acidophiles and heterotrophic fungal strains were used in the experiments and compared to chemical leaching using specific acids (sulfuric, citric and oxalic acids). Under optimum conditions, 100% extraction efficiency of Cu, and nearly 85% of Zn, Fe, Al and Ni were achieved from PCB and tantalum capacitor scrap samples using sulfuric acid. The mixed consortium of acidophiles successfully mobilized, Ni and Cu (99% and 96%, respectively) while Fe, Zn, Al and Mn reached an extraction yield of 89, 77, 70 and 43%, respectively, from the PCB samples. For the tantalum capacitor samples, acidophiles mobilized 92% Cu, 88% Ni, 78% Fe, 77% Al, 70% Zn and 57% Mn. Metal mobilization from PCBs and tantalum capacitor scrap by A. niger filtrate showed efficient solubilization of Cu, Fe, Al, Mn, Ni, Pb and Zn at an efficiency of 52, 29, 75, 5, 61, 21 and 35% from PCB samples and 61, 25, 69, 23, 68, 15 and 45% from tantalum capacitor samples, respectively. Microbial leaching proved viable as a method to extract base metals but was less specific for tantalum and precious metals in electronic waste. The implications of these results for further processing of waste electronic and electrical equipment (WEEE) are considered in potential hybrid treatment strategies.
Collapse
Affiliation(s)
- Asma Sikander
- Department of Process Engineering, Hamburg University of Applied Sciences, Ulmenliet 20, 21033 Hamburg, Germany
- School of Computing, Engineering & Physical Sciences, University of the West of the Scotland, Scotland PA1 2BE, UK
| | - Steven Kelly
- School of Health Life Sciences, University of the West of Scotland, Scotland G72 0LH, UK
| | - Kerstin Kuchta
- Institute for Environmental Engineering and Energy Economics, TUHH—Hamburg University of Technology, 21079 Hamburg, Germany
| | - Anika Sievers
- Department of Process Engineering, Hamburg University of Applied Sciences, Ulmenliet 20, 21033 Hamburg, Germany
| | - Thomas Willner
- Department of Process Engineering, Hamburg University of Applied Sciences, Ulmenliet 20, 21033 Hamburg, Germany
| | - Andrew S. Hursthouse
- School of Computing, Engineering & Physical Sciences, University of the West of the Scotland, Scotland PA1 2BE, UK
| |
Collapse
|
22
|
Nagrath M, Bince D, Rowsell C, Polintan D, Rezende-Neto J, Towler M. Porcine liver injury model to assess tantalum-containing bioactive glass powders for hemostasis. J Mater Sci Mater Med 2022; 33:53. [PMID: 35670885 PMCID: PMC9174136 DOI: 10.1007/s10856-022-06674-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Accepted: 05/18/2022] [Indexed: 06/15/2023]
Abstract
This study evaluates compositions of tantalum-containing mesoporous bioactive glass (Ta-MBG) powders using a porcine fatal liver injury model. The powders based on (80-x)SiO2-15CaO-5P2O5-xTa2O5 compositions with x = 0 (0Ta/Ta-free), 1 (1Ta), and 5 (5Ta) mol% were made using a sol-gel process. A class IV hemorrhage condition was simulated on the animals; hemodynamic data and biochemical analysis confirmed the life-threatening condition. Ta-MBGs were able to stop the bleeding within 10 min of their application while the bleeds in the absence of any intervention or in the presence of a commercial agent, AristaTM (Bard Davol Inc., Rhode Island, USA) continued for up to 45 min. Scanning electron microscopy (SEM) imaging of the blood clots showed that the presence of Ta-MBGs did not affect clot morphology. Rather, the connections seen between fibrin fibers of the blood clot and Ta-MBG powders point towards the powders' surfaces embracing fibrin. Histopathological analysis of the liver tissue showed 5Ta as the only composition reducing parenchymal hemorrhage and necrosis extent of the tissue after their application. Additionally, 5Ta was also able to form an adherent clot in worst-case scenario bleeding where no adherent clot was seen before the powder was applied. In vivo results from the present study agree with in vitro results of the previous study that 5Ta was the best Ta-MBG composition for hemostatic purposes. Graphical abstract.
Collapse
Affiliation(s)
- Malvika Nagrath
- Biomedical Engineering, Faculty of Engineering and Architectural Science (FEAS), Ryerson University, Toronto, M5B 2K3, ON, Canada.
- Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, M5B 1W8, ON, Canada.
| | - Danielle Bince
- Research Vivarium, St. Michael's Hospital, Toronto, M5B 1W8, ON, Canada
| | - Corwyn Rowsell
- Department of Laboratory Medicine, St. Michael's Hospital, Toronto, M5B 1W8, ON, Canada
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, M5S 1A1, ON, Canada
| | - Deanna Polintan
- Biomedical Engineering, Faculty of Engineering and Architectural Science (FEAS), Ryerson University, Toronto, M5B 2K3, ON, Canada
| | - Joao Rezende-Neto
- Trauma and Acute Care, General Surgery, St. Michael's Hospital, Toronto, M5B 1W8, ON, Canada
- Department of Surgery, University of Toronto, Toronto, M5S 1A1, ON, Canada
| | - Mark Towler
- Biomedical Engineering, Faculty of Engineering and Architectural Science (FEAS), Ryerson University, Toronto, M5B 2K3, ON, Canada
- Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, M5B 1W8, ON, Canada
- Department of Mechanical and Industrial Engineering, FEAS, Ryerson University, Toronto, M5B 2K3, ON, Canada
| |
Collapse
|
23
|
Gibon E, Vasilopoulos T, Sipavicius E, Deen JT, Prieto HA, Gray CF, Parvataneni HK, Pulido L. Surgical Management of Tibial Bone Loss in Revision Total Knee Arthroplasty: Clinical Outcomes and Radiographic Analysis of Tantalum Cones, Titanium Cones and Titanium Sleeves. Iowa Orthop J 2022; 42:145-153. [PMID: 35821926 PMCID: PMC9210416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
BACKGROUND The use of metaphyseal cones and sleeves has improved the ability to manage tibial bone loss in revision total knee arthroplasty (TKA). The purpose of this study was to compare the outcomes of three systems used for tibial metaphyseal reconstruction in revision TKA. METHODS We performed a retrospective review of a consecutive series of 723 revision TKAs, including 145 (20%) knee revisions using tibial cones or sleeves. We compared porous tantalum (TM) cones, titanium (Ti) cones and titanium sleeves. The mean follow-up was 2.5 years. RESULTS The rate of revision for any reason was similar among all groups. Revision-free survival rates were similar among all systems studied at a mean follow-up of 2.5 years (TM cones 93%, Ti cones 94%, titanium sleeves 89%). Ti cones had a lower complication rate (6%) compared to TM cones (24%) and sleeves (29%). TM cones (15%) and titanium sleeves (13%) had higher reoperation rates (for any cause) than Ti cones (2%). Radiographic loosening was higher for sleeves (11%) than TM and Ti cones (2%). CONCLUSION Metaphyseal reconstruction for tibial bone loss in revision TKA using tantalum cones, titanium cones and titanium sleeves showed successful and comparable early clinical outcomes at a mean follow-up of 2.5 years with higher rates of radiographic loosening for titanium sleeves. Level of Evidence: III.
Collapse
Affiliation(s)
- Emmanuel Gibon
- Department of Orthopaedic Surgery and Rehabilitation, University of Florida, Gainesville, Florida, USA
| | - Terrie Vasilopoulos
- Department of Anesthesiology, University of Florida, Gainesville, Florida, USA
| | - Edvinas Sipavicius
- Department of Orthopaedic Surgery and Rehabilitation, University of Florida, Gainesville, Florida, USA
| | - Justin T. Deen
- Department of Orthopaedic Surgery and Rehabilitation, University of Florida, Gainesville, Florida, USA
| | - Hernan A. Prieto
- Department of Orthopaedic Surgery and Rehabilitation, University of Florida, Gainesville, Florida, USA
| | - Chancellor F. Gray
- Department of Orthopaedic Surgery and Rehabilitation, University of Florida, Gainesville, Florida, USA
| | - Hari K. Parvataneni
- Department of Orthopaedic Surgery and Rehabilitation, University of Florida, Gainesville, Florida, USA
| | - Luis Pulido
- Department of Orthopaedic Surgery and Rehabilitation, University of Florida, Gainesville, Florida, USA
| |
Collapse
|
24
|
Shtangeeva I. Accumulation of scandium, cerium, europium, hafnium, and tantalum in oats and barley grown in soils that differ in their characteristics and level of contamination. Environ Sci Pollut Res Int 2022; 29:40839-40853. [PMID: 35083671 DOI: 10.1007/s11356-021-18247-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Accepted: 12/16/2021] [Indexed: 06/14/2023]
Abstract
Up to now, information about biogeochemistry of many trace elements is scarce. Meanwhile, all the elements are always present in soil and plants. It may be suggested that the trace elements also play certain role in the biogeochemical processes. The aim of the research was to study bioaccumulation of poorly investigated trace elements (scandium, cerium, europium, hafnium, and tantalum) and well-known elements (chromium, iron, cobalt, zinc, and arsenic) in two crops, oats and barley, and examine how these elements interact with each other as they absorbed by plants. The plants were grown in the soils that differed in their parameters and in level of contamination. Although oats and barley are botanically similar and were grown under the same conditions, the plants differed in the ability to accumulate many elements. The uptake of the elements by the plants also depended on type of soil. For example, concentrations of Cr, Fe, Co, As, Sc, Ce, Eu, Hf, and Ta in roots of the oats grown in slightly contaminated soil were much higher as compared to the concentrations of the elements in roots of the barley grown in the same soil. In leaves of the oats grown in moderately contaminated soil, the concentrations of Cr, As, Ce, Eu, and Ta were statistically significantly higher than those in leaves of the barley grown in the soil. In soils and in plants, relationships between elements were both similar and different. A statistically significant correlation was found between the poorly investigated trace elements and well-studied elements.
Collapse
Affiliation(s)
- Irina Shtangeeva
- Institute of Earth Sciences, St. Petersburg State University, St. Petersburg, Russia.
| |
Collapse
|
25
|
Swain B, Lee J, Woo Gu B, Lee CG, Yoon JH. Sustainable valorization of semiconductor industry tantalum scrap using non-hazardous HF substitute lixiviant. Waste Manag 2022; 144:294-302. [PMID: 35427901 DOI: 10.1016/j.wasman.2022.04.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 03/29/2022] [Accepted: 04/06/2022] [Indexed: 06/14/2023]
Abstract
Global tantalum production from mines averages 1800 tons per year and hardly increases, but demand for tantalum in the electronics industry consistently increasing. Globally, 50% of total tantalum produced is being used for tantalum capacitors manufacturing, almost all demand from various industries is mainly met by primary resources only. Tantalum production and supply predominantly dominated by Congo and Rwanda which accounts for > 50%, add disadvantages for the strategic and economic competitiveness of other nations. To address the monopoly dominated by Congo and Rwanda, and the disparity of tantalum primary reserve, exploitation of secondary resources can alternatively address the drawbacks of primary resource distribution. Currently, hardly < 1% of tantalum getting recycled, and the poor recycling rate of tantalum is mainly contributed by the lack of efficient and sustainable valorization technology for recycling tantalum-bearing scraps like electronic capacitors and semiconductor industry tantalum scrap. In the current investigation, a sustainable tantalum extraction process from scrap dominated by hydrometallurgical route has been developed. Tantalum scrap which is passive to leach for tantalum recovery was calcinated for oxidation of TaN content and followed by tantalum has been leached using a mixture of NaF and HCl, a specially developed novel lixiviant for the purpose as an HF substituent. Calcination process parameter like temperature and time requirement for oxidation was optimized varying one parameter at a time. Then, the efficient leaching condition was optimized for quantitative leaching of tantalum. The process can achieve 99.99% efficient leaching, the process can successfully be applied for feasible industrial-scale tantalum scrap recycling. The HF substituent lixiviant can add advantages to overcome occupational and industrial operation safety challenges associated with HF lixiviant. The reported valorization process can be a sustainable tantalum recycling process that simultaneously can address UNO sustainable development goal, WEEE directive, and UNEP E-Waste Management goal.
Collapse
Affiliation(s)
- Basudev Swain
- Institute for Advanced Engineering (IAE), Materials Science and Chemical Engineering Center, Yongin-Si 449-863, Republic of Korea.
| | - Jieun Lee
- Institute for Advanced Engineering (IAE), Materials Science and Chemical Engineering Center, Yongin-Si 449-863, Republic of Korea
| | - Bon Woo Gu
- ECO Recycling Co., Ltd, Incheon, Republic of Korea
| | - Chan-Gi Lee
- Institute for Advanced Engineering (IAE), Materials Science and Chemical Engineering Center, Yongin-Si 449-863, Republic of Korea
| | - Jin-Ho Yoon
- Institute for Advanced Engineering (IAE), Materials Science and Chemical Engineering Center, Yongin-Si 449-863, Republic of Korea
| |
Collapse
|
26
|
Yu X, Huang J, Zhao J, Zhou C, Xin C, Guo Q. Topotactic formation of poriferous (Al,C)-Ta 2O 5 mesocrystals for improved visible-light photocatalysis. J Environ Manage 2022; 304:114289. [PMID: 34929428 DOI: 10.1016/j.jenvman.2021.114289] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Revised: 12/03/2021] [Accepted: 12/10/2021] [Indexed: 06/14/2023]
Abstract
Poriferous monocrystal-like nanostructures are contributing to fabricate long-distance charge transfer pathways and rapid diffusions of the degraded products, and attracts wide attentions. In this work, layered and poriferous (Al,C)-Ta2O5 mesocrystals were fabricated by topotactic transformation strategy with Ta4AlC3 MAX as starting materials for visible-light photocatalytic antibiotic degradation. The prepared sample exhibited enhanced visible-light absorption and visible-light photocatalytic performance, far superior to those of commercial Ta2O5 and Ta4AlC3 MAX, which was mainly because of the elemental doping in the samples. The experimental results also indicated that continuous attacks of the photo-generated holes and ·O2- species efficiently induced efficient visible-light photodegradation of tetracycline. Current work also indicates a new and potential tantalum-based semiconductors for high-performance environmental photocatalysis.
Collapse
Affiliation(s)
- Xin Yu
- Henan Engineering Research Center of Resource & Energy Recovery from Waste, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, China.
| | - Jielin Huang
- Henan Engineering Research Center of Resource & Energy Recovery from Waste, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, China
| | - Jiawei Zhao
- Henan Engineering Research Center of Resource & Energy Recovery from Waste, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, China
| | - Chao Zhou
- Henan Engineering Research Center of Resource & Energy Recovery from Waste, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, China
| | - Changhui Xin
- Henan Engineering Research Center of Resource & Energy Recovery from Waste, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, China
| | - Quanhui Guo
- Henan Engineering Research Center of Resource & Energy Recovery from Waste, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, China.
| |
Collapse
|
27
|
Wang YH, Zou SP, Chen B, Chen CL, Chen WZ. [Application of porous tantalum Jumbo cup in revision of hip arthroplasty]. Zhongguo Gu Shang 2022; 35:20-25. [PMID: 35130594 DOI: 10.12200/j.issn.1003-0034.2022.01.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
OBJECTIVE To investigate the clinical effect of porous tantalum Jumbo cup on acetabular reconstruction in revision of total hip arthroplasty. METHODS From September 2014 to December 2017, 18 patients(18 hips) with acetabular defect were reconstructed by porous tantalum Jumbo cup technology, including 6 males and 12 females;the age ranged from 54 to 76 years old with an average of(63.8±15.3) years. There were 6 cases of paprosky typeⅡA, 8 cases of typeⅡB, 2 cases of typeⅡC and 2 cases of type Ⅲ a. Harris score and visual analogue scale (VAS) were performed before and after operation. Imaging examination was performed to evaluate the position of hip rotation center and prosthesis, and to judge whether acetabular loosening, displacement and complications existed. RESULTS All cases were followed up for 13 to 49 months, with an average of 20.6 months. Harris score increased from 54.6±4.7 to 86.5±3.2 one year after operation(P<0.01), and VAS score decreased from 6.8±0.7 to 0.8±0.6 one year after operation (P<0.01). The transverse coordinate of hip rotation center was (3.52±0.72) cm before operation and (3.47±0.54) cm after operation (P>0.05). The longitudinal coordinate of hip rotation center was improved from (3.02±0.84) cm before operation to (2.35±0.53) cm after operation (P<0.01). During the follow-up period, the Jumbo cup was well fixed without loosening and displacement, the acetabular cup had bone ingrowth in varying degrees, and no light transmission line and osteolysis around the acetabular cup were found. No complications such as infection and nerve injury occurred. CONCLUSION The method of reconstructing acetabular bone defect with porous tantalum Jumbo cup is simple and easy, the early stability of acetabulum is good, and the short-term follow-up effect is good.
Collapse
Affiliation(s)
- Yue-Hui Wang
- Department of Joint Surgery, Zhengzhou Orthopaedics Hospital, Zhengzhou 450008, Henan, China
| | - Shi-Ping Zou
- Department of Joint Surgery, Zhengzhou Orthopaedics Hospital, Zhengzhou 450008, Henan, China
| | - Bin Chen
- Department of Joint Surgery, Zhengzhou Orthopaedics Hospital, Zhengzhou 450008, Henan, China
| | - Cheng-Liang Chen
- Department of Joint Surgery, Zhengzhou Orthopaedics Hospital, Zhengzhou 450008, Henan, China
| | - Wen-Zhong Chen
- Department of Joint Surgery, Zhengzhou Orthopaedics Hospital, Zhengzhou 450008, Henan, China
| |
Collapse
|
28
|
Hu G, Zhu Y, Xu F, Ye J, Guan J, Jiang Y, Di M, Li Z, Guan H, Yao X. Comparison of surface properties, cell behaviors, bone regeneration and osseointegration between nano tantalum/PEEK composite and nano silicon nitride/PEEK composite. J Biomater Sci Polym Ed 2022; 33:35-56. [PMID: 34464239 DOI: 10.1080/09205063.2021.1974812] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Accepted: 08/27/2021] [Indexed: 10/20/2022]
Abstract
Both tantalum (Ta) and silicon nitride (SN) exhibit osteogenic bioactivity and antibacterial property. In addition, as a biomaterial for bone repair, polyetheretherketone (PEEK) has outstanding biocompatibility and mechanical performances while it is biologically inert. In this study, by blending PEEK with Ta and SN nanoparticles, respectively, Ta/PEEK composite (TPC) and SN/PEEK composite (SPC) were fabricated for load-bearing bone repair. The surface roughness, hydrophilicity and surface energy of TPC containing Ta nanoparticles were higher than SPC containing SN nanoparticles and PEEK. In addition, TPC with Ta nanoparticles exhibited low antibacterial property while SPC with SN nanoparticles showed high bacterial property. Moreover, the MC3T3-E1 cells responses (e.g. proliferation and differentiation) to TPC was the highest while PEEK was the lowest in vitro. Furthermore, new bone formation and osseointegration for TPC was the highest while PEEK was the lowest in vivo. In conclusion, compared with PEEK, addition of Ta and SN nanoparticles into PEEK fabricated bioactive composites of TPC and SPC with optimized surface property, which played crucial roles in inducing cellular response/bone regeneration. Although the osteogenic activity of SPC was lower than TPC, SPC exhibited osteogenic activity and good antibacterial property, which could prevent infection from bacterial. Therefore, SPC would have better potential for bone substitute.
Collapse
Affiliation(s)
- Gangfeng Hu
- Department of Orthopedics, Xiaoshan Affiliated Hospital of Wenzhou Medical University, Hangzhou, Zhejiang, China
| | - Yuan Zhu
- Department of Orthopedics, Xiaoshan Affiliated Hospital of Wenzhou Medical University, Hangzhou, Zhejiang, China
| | - Fangqi Xu
- Department of Orthopedics, Xiaoshan Affiliated Hospital of Wenzhou Medical University, Hangzhou, Zhejiang, China
| | - Jiakuan Ye
- Department of Orthopedics, Xiaoshan Affiliated Hospital of Wenzhou Medical University, Hangzhou, Zhejiang, China
| | - Jie Guan
- Department of Orthopedics, Xiaoshan Affiliated Hospital of Wenzhou Medical University, Hangzhou, Zhejiang, China
| | - Yiqian Jiang
- Department of Orthopedics, Xiaoshan Affiliated Hospital of Wenzhou Medical University, Hangzhou, Zhejiang, China
| | - Meijuan Di
- Department of Orthopedics, Xiaoshan Affiliated Hospital of Wenzhou Medical University, Hangzhou, Zhejiang, China
| | - Zhennan Li
- The Second Clinical Medicine College, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, China
| | - Hong Guan
- The Second Clinical Medicine College, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, China
| | - Xiaocong Yao
- Department of Orthopedics, Xiaoshan Affiliated Hospital of Wenzhou Medical University, Hangzhou, Zhejiang, China
| |
Collapse
|
29
|
Lawson T, Joenathan A, Patwa A, Snyder BD, Grinstaff MW. Tantalum Oxide Nanoparticles for the Quantitative Contrast-Enhanced Computed Tomography of Ex Vivo Human Cartilage: Assessment of Biochemical Composition and Biomechanics. ACS Nano 2021; 15:19175-19184. [PMID: 34882411 DOI: 10.1021/acsnano.1c03375] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Nanoparticle-based contrast agents, when used in concert with imaging modalities such as computed tomography (CT), enhance the visualization of tissues and boundary interfaces. However, the ability to determine the physiological state of the tissue via the quantitative assessment of biochemical or biomechanical properties remains elusive. We report the synthesis and characterization of tantalum oxide (Ta2O5) nanoparticle (NP) contrast agents for rapid, nondestructive, and quantitative contrast-enhanced computed tomography (CECT) to assess both the glycosaminoglycan (GAG) content and the biomechanical integrity of human metacarpal phalangeal joint (MCPJ) articular cartilage. Ta2O5 NPs 3-6 nm in diameter and coated with either nonionic poly(ethylene) glycol (PEG) or cationic trimethylammonium ligands readily diffuse into both healthy and osteoarthritic MCPJ cartilage. The CECT attenuation for the cationic and neutral NPs correlates with the glycosaminoglycan (GAG) content (R2 = 0.8975, p < 0.05 and 0.7054, respectively) and the equilibrium modulus (R2 = 0.8285, p < 0.05 and 0.9312, p < 0.05, respectively). The results highlight the importance of the surface charge and size in the design of NP agents for targeting and imaging articular cartilage. Further, nanoparticle CECT offers the visualization of both soft tissue and underlying bone unlike plain radiography, which is the standard for imaging bone in musculoskeletal diseases, and the ability to provide a real-time quantitative assessment of both hard and soft tissues to provide a comprehensive image of the disease stage, as demonstrated herein.
Collapse
Affiliation(s)
- Taylor Lawson
- Center for Advanced Orthopaedic Studies, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts 02215, United States
- Department of Mechanical Engineering, Boston University, Boston, Massachusetts 02215, United States
| | - Anisha Joenathan
- Center for Advanced Orthopaedic Studies, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts 02215, United States
- Division of Material Science, Boston University, Boston, Massachusetts 02215, United States
| | - Amit Patwa
- Center for Advanced Orthopaedic Studies, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts 02215, United States
- Department of Chemistry, School of Science, Navrachana University, Vadodara, Gujarat 391410, India
| | - Brian D Snyder
- Center for Advanced Orthopaedic Studies, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts 02215, United States
- Department of Orthopaedic Surgery, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts 02215, United States
| | - Mark W Grinstaff
- Department of Biomedical Engineering, Boston University, Boston, Massachusetts 02215, United States
- Department of Medicine, Boston University, Boston, Massachusetts 02215 United States
| |
Collapse
|
30
|
Chen G, Yin Y, Chen C. Limb-salvage surgery using personalized 3D-printed porous tantalum prosthesis for distal radial osteosarcoma: A case report. Medicine (Baltimore) 2021; 100:e27899. [PMID: 34797342 PMCID: PMC8601349 DOI: 10.1097/md.0000000000027899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Accepted: 11/03/2021] [Indexed: 01/05/2023] Open
Abstract
RATIONALE Three-dimensional (3D) printing has been widely utilized for treating the tumors of bone and soft tissue. We herewith report a unique case of distal radial osteosarcoma who was treated with a 3D printed porous tantalum prosthesis.Patient concerns: A 58-year-old Chinese male patient presented to our clinic complaining about a 6-month history of a progressive pain at his right hand, associated with a growing lump 2 months later. DIAGNOSIS Osteosarcoma of distal radius confirmed by percutaneous biopsy and tumor biopsy. INTERVENTIONS A limb-salvage surgery was performed with a 3D printed porous tantalum prosthesis, combined with the postoperative chemotherapy for 4 cycles. OUTCOMES At 2-year follow-up, complete pain relief and satisfactory functional recovery of his right wrist were observed. LESSONS Personalized 3D printed prosthesis is an effective and feasible method for treating the osteosarcoma and reconstruction of complex bone defects.
Collapse
Affiliation(s)
- Ge Chen
- Department of Orthopedics, Affiliated Hospital of Southwest Medical University, Luzhou City, Sichuan Province, China
| | - Yiran Yin
- Department of Orthopedics, Affiliated Hospital of Southwest Medical University, Luzhou City, Sichuan Province, China
| | - Chang Chen
- Department of Orthopedics, Ziyang First People‘s Hospital, Ziyang, Sichuan Province, China
| |
Collapse
|
31
|
Carvalho FP, Tufa MB, Oliveira JM, Malta M. Radionuclides and Radiation Exposure in Tantalite Mining, Ethiopia. Arch Environ Contam Toxicol 2021; 81:648-659. [PMID: 34080047 DOI: 10.1007/s00244-021-00858-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 05/20/2021] [Indexed: 06/12/2023]
Abstract
Tantalite and columbite ores have been reported as containing associated primordial radionuclides, such as uranium and thorium. Ethiopia is one of the world suppliers of tantalite ore through exploitation of Kenticha mine and tantalite production by a large number of artisanal miners. For the purpose of implementing the international standards for radiation protection of workers and members of the public, a preliminary assessment of radionuclides and radiation doses associated to tantalite mining was performed. Results confirmed and quantified the co-occurrence of uranium and thorium and their progeny in tantalite ore. Radiation doses at some workplaces may exceed the effective dose limit recommended by the international radiation safety standards for nonradiation workers and members of the public. Investments to be made in order to expand and modernize tantalite production in Ethiopia shall take into account the radiation hazards and implement a radiation protection program to prevent enhanced occupational radiation exposures and protect the public and the environment.
Collapse
Affiliation(s)
- Fernando P Carvalho
- Instituto Superior Técnico (IST), Laboratório de Protecção e Segurança Radiológica, Universidade de Lisboa, Estrada Nacional 10, km 139, 2695-066, Bobadela, LRS, Portugal.
| | - Mengistu B Tufa
- Ethiopian Radiation Protection Authority (ERPA), Addis Ababa, Ethiopia
- Ethiopian Technology and Innovation Institute (TechIn), P.O. Box 2884, Arat killo, Arada Sub-City, Addis Ababa, Ethiopia
| | - João M Oliveira
- Instituto Superior Técnico (IST), Laboratório de Protecção e Segurança Radiológica, Universidade de Lisboa, Estrada Nacional 10, km 139, 2695-066, Bobadela, LRS, Portugal
| | - Margarida Malta
- Instituto Superior Técnico (IST), Laboratório de Protecção e Segurança Radiológica, Universidade de Lisboa, Estrada Nacional 10, km 139, 2695-066, Bobadela, LRS, Portugal
| |
Collapse
|
32
|
Chen W, Yang J, Kong H, Helou M, Zhang D, Zhao J, Jia W, Liu Q, He P, Li X. Fatigue behaviour and biocompatibility of additively manufactured bioactive tantalum graded lattice structures for load-bearing orthopaedic applications. Mater Sci Eng C Mater Biol Appl 2021; 130:112461. [PMID: 34702536 DOI: 10.1016/j.msec.2021.112461] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 09/23/2021] [Accepted: 09/24/2021] [Indexed: 01/16/2023]
Abstract
Laser powder bed fusion (LPBF) additive manufacturing of pure tantalum and their graded lattice structures was systematically investigated, with emphasis on their microstructure evolution, phase formation, surface energy and biological properties in comparison with conventionally forged pure Ta. The LPBF fabricated Ta (LPBF-Ta) exhibited lower contact angles and higher surface energy than the forged-Ta which indicated the better wettability of the LPBF-Ta. The adhesion and proliferation of rat bone marrow stromal cells (rBMSCs) were also enhanced for the LPBF-Ta when compared to forged-Ta. Three different Ta graded gyroid lattice structures (i.e., uniform structure, Y-gradient structure, Z-gradient structure) were designed and fabricated using the same optimised LPBF parameters. Y-gradient structures exhibited the best plateau stress and compressive modulus among three different graded structures due to the maximum local volume fraction on the fracture plane. In fatigue response, Y-gradient outperformed the other two gyroid structures under varying stresses. In terms of cell culture response, the uniform structures performed the best biocompatibility due to its suitable pore size for cell adhesion and growth. This study provides new and in-depth insights into the LPBF additive manufacturing of pure Ta graded lattice structures with desired fatigue and biological properties for load-bearing orthopaedic applications.
Collapse
Affiliation(s)
- Wenliang Chen
- School of Mechanical and Manufacturing Engineering, The University of New South Wales (UNSW Sydney), Sydney, NSW 2052, Australia
| | - Jingzhou Yang
- School of Mechanical & Automobile Engineering, Qingdao University of Technology, Qingdao, Shandong, PR China; Shenzhen Dazhou Medical Technology Co., Ltd., Shenzhen, Guangdong, PR China; Center of Biomedical Materials 3D Printing, National Engineering Laboratory for Polymer Complex Structure Additive Manufacturing, Baoding, Hebei, PR China.
| | - Hui Kong
- School of Materials Science and Engineering, The University of New South Wales (UNSW Sydney), Sydney, NSW 2052, Australia
| | - Mark Helou
- School of Mechanical and Manufacturing Engineering, The University of New South Wales (UNSW Sydney), Sydney, NSW 2052, Australia; NEPEAN Engineering & Innovation, Sydney, NSW 2567, Australia
| | - Dachen Zhang
- Shenzhen Dazhou Medical Technology Co., Ltd., Shenzhen, Guangdong, PR China; Center of Biomedical Materials 3D Printing, National Engineering Laboratory for Polymer Complex Structure Additive Manufacturing, Baoding, Hebei, PR China
| | - Jinhui Zhao
- Department of Orthopedic Surgery, Shanghai Jiaotong University Affiliated Sixth People's Hospital, Shanghai 200233, PR China
| | - Weitao Jia
- Department of Orthopedic Surgery, Shanghai Jiaotong University Affiliated Sixth People's Hospital, Shanghai 200233, PR China
| | - Qian Liu
- School of Mechanical and Manufacturing Engineering, The University of New South Wales (UNSW Sydney), Sydney, NSW 2052, Australia
| | - Peidong He
- School of Mechanical and Manufacturing Engineering, The University of New South Wales (UNSW Sydney), Sydney, NSW 2052, Australia
| | - Xiaopeng Li
- School of Mechanical and Manufacturing Engineering, The University of New South Wales (UNSW Sydney), Sydney, NSW 2052, Australia.
| |
Collapse
|
33
|
Abstract
Understanding the interaction between living cells and a tantalum pentoxide (Ta2O5) gate electrode is important for controlling cell adhesion and functions when developing a cultured-cell-gate field-effect transistor biosensor. In this study, we evaluate the cell adhesion characteristics of the Ta2O5 membrane without or with a polydopamine (pDA) coating for chondrocytes, which is expected as a treatment for improving biocompatibility. As a result, the native and pDA-modified Ta2O5 membranes are shown to have the appropriate surface tension (35-40 dyn/cm) for the adhesion of chondrocytes owing to the contribution of surface tension to not only the nonspecific adsorption of serum proteins as the scaffold of chondrocytes but also the maintenance of the conformation of serum proteins. In particular, the serum proteins adhere more efficiently to the native Ta2O5 membrane than to the pDA-modified ones owing to the relatively smaller surface tension of the native Ta2O5 membrane; as a result, the proliferation and production of extracellular matrix (ECM) proteins such as collagen and proteoglycans by chondrocytes are clearly enhanced on the native Ta2O5 membrane. Thus, the native Ta2O5 membrane shows superior performance for the chondrocyte culture on it compared with the pDA-modified ones.
Collapse
Affiliation(s)
- Hiroto Satake
- Department of Materials Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Toshiya Sakata
- Department of Materials Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| |
Collapse
|
34
|
Liu H, Wu T, Yan X, Wu J, Wang N, Du Z, Yang H, Chen B, Zhang Z, Liu F, Wu W, Guo J, Wang H. A Tantalum Disulfide Charge-Density-Wave Stochastic Artificial Neuron for Emulating Neural Statistical Properties. Nano Lett 2021; 21:3465-3472. [PMID: 33835802 DOI: 10.1021/acs.nanolett.1c00108] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Artificial neuronal devices that functionally resemble biological neurons are important toward realizing advanced brain emulation and for building bioinspired electronic systems. In this Communication, the stochastic behaviors of a neuronal oscillator based on the charge-density-wave (CDW) phase transition of a 1T-TaS2 thin film are reported, and the capability of this neuronal oscillator to generate spike trains with statistical features closely matching those of biological neurons is demonstrated. The stochastic behaviors of the neuronal device result from the melt-quench-induced reconfiguration of CDW domains during each oscillation cycle. Owing to the stochasticity, numerous key features of the Hodgkin-Huxley description of neurons can be realized in this compact two-terminal neuronal oscillator. A statistical analysis of the spike train generated by the artificial neuron indicates that it resembles the neurons in the superior olivary complex of a mammalian nervous system, in terms of its interspike interval distribution, the time-correlation of spiking behavior, and its response to acoustic stimuli.
Collapse
Affiliation(s)
- Hefei Liu
- Ming Hsieh Department of Electrical and Computer Engineering, University of Southern California, Los Angeles 90089, California, United States
| | - Tong Wu
- Department of Electrical and Computer Engineering, University of Florida, Gainesville 32611, Florida, United States
| | - Xiaodong Yan
- Ming Hsieh Department of Electrical and Computer Engineering, University of Southern California, Los Angeles 90089, California, United States
| | - Jiangbin Wu
- Ming Hsieh Department of Electrical and Computer Engineering, University of Southern California, Los Angeles 90089, California, United States
| | - Nan Wang
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles 90089, California, United States
| | - Zhonghao Du
- Ming Hsieh Department of Electrical and Computer Engineering, University of Southern California, Los Angeles 90089, California, United States
| | - Hao Yang
- Ming Hsieh Department of Electrical and Computer Engineering, University of Southern California, Los Angeles 90089, California, United States
| | - Buyun Chen
- Ming Hsieh Department of Electrical and Computer Engineering, University of Southern California, Los Angeles 90089, California, United States
| | - Zhihan Zhang
- School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta 30332, Georgia, United States
| | - Fanxin Liu
- Collaborative Innovation Center for Information Technology in Biological and Medical Physics, and College of Science, Zhejiang University of Technology, Hangzhou 310023, China
| | - Wei Wu
- Ming Hsieh Department of Electrical and Computer Engineering, University of Southern California, Los Angeles 90089, California, United States
| | - Jing Guo
- Department of Electrical and Computer Engineering, University of Florida, Gainesville 32611, Florida, United States
| | - Han Wang
- Ming Hsieh Department of Electrical and Computer Engineering, University of Southern California, Los Angeles 90089, California, United States
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles 90089, California, United States
| |
Collapse
|
35
|
David OA, Akomolafe GF, Akanmu AO, Ogunlowo II. The impact of tantalite mining on the flora diversity in Nasarawa state, Nigeria. Environ Monit Assess 2021; 193:46. [PMID: 33415474 DOI: 10.1007/s10661-020-08827-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Accepted: 12/27/2020] [Indexed: 06/12/2023]
Abstract
The activities of the artisanals and small-scale miners in Nasarawa state, Nigeria, are increasing daily without considering the loss of biodiversity, which has continuously disrupted ecological functions and environmental balance. The study aimed at investigating the effect of tantalite mining activities on flora diversity. Three study sites were selected for floristic data collection, comprising tantalite mining site A situated in Azara, Awe LGA; tantalite mining site B situated in Tunga, Awe LGA; and referred site C situated along the Makurdi-Obi Road, Lafia LGA. Eight plots of 20 × 20 m were systematically placed along two transect lines of 1000 m with 500 m distance apart. The total numbers of 32 plant species, at the ratio of 11:20:21 individual species, were found in sites A, B, and referred site C, respectively. Tantalite mining site A showed 46% rare herbs dominating the site, with an introduction of new non-native species of Jateorhiza spp. and Hyptis suaveolens, presenting a significantly high number of individuals (p ˂ 0.0069). Tantalite site B, Tunga, had 50% reductions of several indigenous tree species such as Daniellia oliveri and Vitex doniana, while site A had 75% reduction of tree species. Therefore, the floristic diversity in site A endured a higher degradation than in site B. The indigenous species in site A were almost completely replaced with problematic weeds, invasive weed species, and non-native plant species. The tree diversities in sites A and B were seriously threatened, and H. suaveolens has been regarded as a potentially invasive plant species in Nasarawa state, Nigeria.
Collapse
Affiliation(s)
- Oyinade A David
- Department of Plant Science and Biotechnology, Faculty of Science, Federal University Oye-Ekiti, Oye, Ekiti, Nigeria.
| | - Gbenga F Akomolafe
- Department of Botany, Federal University of Lafia, Lafia, Nasarawa State, Nigeria
| | - Akinlolu O Akanmu
- Food Security and Safety Niche, Faculty of Natural and Agricultural Sciences, North-West University, Mmabatho, South Africa
| | | |
Collapse
|
36
|
Concina C, Crucil M, Gherlinzoni F. Can porous tantalum acetabular cups and augments restore the hip centre of rotation in revision hip arthroplasty? Long-term results. Acta Biomed 2021; 92:e2021549. [PMID: 35604256 PMCID: PMC9437671 DOI: 10.23750/abm.v92is3.12398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Accepted: 12/22/2021] [Indexed: 11/23/2022]
Abstract
BACKGROUND AND AIM Loss of bone stock is the main problem in revision hip arthroplasty. Porous tantalum cups and augment constructs are possible solutions. The aim of this study was to describe results at an average follow-up of 10 years using these cups. METHODS 25 patients underwent to revision hip arthroplasty with porous tantalum cups. Acetabular bone defects were classified according to Paprosky's in type II and III. All patients were reviewed clinically and radiographically at an average follow-up of 10 years (range 8.5 to 13 years). Changes in inclination angle of the cup and position of the hip centre of rotation (COR - measured and calculated using Pierchon's method), and possible periacetabular radiolucency lines were assessed. RESULTS A statistically significant improvement in Harris Hip Score and hip range of motion was observed. The hip COR had been lowered by 19.33 mm after revision and no changes in COR position had been measured at follow-up. Kaplan-Meier survivorship was 100% at an average follow-up of 10 years, considering acetabular revision for any reasons as primary endpoint. 88% of patients was satisfied. Complications were 3 dislocations, 4 asymptomatic heterotopic ossifications and 1 partial reabsorption of greater trochanter. CONCLUSIONS Porous tantalum cups and augments can be considered a valid solution in acetabular revisions for addressing massive bone defects and restoring the hip COR.
Collapse
Affiliation(s)
- Chiara Concina
- Department of Orthopaedics and Traumatology - San Polo Hospital - Monfalcone (GO).
| | - Marina Crucil
- Department of Orthopaedics and Traumatology - San Polo Hospital - Monfalcone (GO).
| | - Franco Gherlinzoni
- Department of Orthopaedics and Traumatology - San Polo Hospital - Monfalcone (GO).
| |
Collapse
|
37
|
Schmitt N, Floca RO, Paech D, El Shafie RA, Seker F, Bendszus M, Möhlenbruch MA, Vollherbst DF. Imaging Artifacts of Liquid Embolic Agents on Conventional CT in an Experimental in Vitro Model. AJNR Am J Neuroradiol 2021; 42:126-131. [PMID: 33214178 DOI: 10.3174/ajnr.a6867] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Accepted: 08/14/2020] [Indexed: 01/02/2023]
Abstract
BACKGROUND AND PURPOSE Endovascular embolization using liquid embolic agents is a safe and effective treatment option for AVMs and dural arteriovenous fistulas. The aim of this study was to assess the degree of artifact inducement by the most frequently used liquid embolic agents in conventional CT in an experimental in vitro model. MATERIALS AND METHODS Dimethyl-sulfoxide-compatible tubes were filled with the following liquid embolic agents (n = 10, respectively): Onyx 18, all variants of Squid, PHIL 25%, PHIL LV, and n-BCA mixed with iodized oil. After inserting the tubes into a CT imaging phantom, we acquired images. Artifacts were graded quantitatively by the use of Hounsfield units in a donut-shaped ROI using a customized software application that was specifically designed for this study and were graded qualitatively using a 5-point scale. RESULTS Quantitative and qualitative analyses revealed the most artifacts for Onyx 18 and the least artifacts for n-BCA, PHIL 25%, and PHIL LV. Squid caused more artifacts compared with PHIL, both for the low-viscosity and for the extra-low-viscosity versions (eg, quantitative analysis, Squid 18: mean ± SD, 30.3 ± 9.7 HU versus PHIL 25%: mean ± SD, 10.6 ± 0.8 HU; P < .001). Differences between the standard and low-density variants of Squid were observed only quantitatively for Squid 12. There were no statistical differences between the different concentrations of Squid and PHIL. CONCLUSIONS In this systematic in vitro analysis investigating the most commonly used liquid embolic agents, relevant differences in CT imaging artifacts could be demonstrated. Ethylene-vinyl alcohol-based liquid embolic agents induced more artifacts compared with liquid embolic agents that use iodine as a radiopaque component.
Collapse
Affiliation(s)
- N Schmitt
- From the Departments of Neuroradiology (N.S., F.S., M.B., M.A.M., D.F.V.)
| | - R O Floca
- Radiation Oncology (R.O.F., R.A.E.S.), Heidelberg University Hospital, Heidelberg, Germany
- Medical and Biological Informatics (R.O.F.)
- Heidelberg Institute for Radiation Oncology and National Center for Radiation Research in Oncology (R.O.F.), Heidelberg, Germany
| | - D Paech
- Department of Radiology (D.P.), German Cancer Research Center, Heidelberg, Germany
| | - R A El Shafie
- Radiation Oncology (R.O.F., R.A.E.S.), Heidelberg University Hospital, Heidelberg, Germany
| | - F Seker
- From the Departments of Neuroradiology (N.S., F.S., M.B., M.A.M., D.F.V.)
| | - M Bendszus
- From the Departments of Neuroradiology (N.S., F.S., M.B., M.A.M., D.F.V.)
| | - M A Möhlenbruch
- From the Departments of Neuroradiology (N.S., F.S., M.B., M.A.M., D.F.V.)
| | - D F Vollherbst
- From the Departments of Neuroradiology (N.S., F.S., M.B., M.A.M., D.F.V.)
| |
Collapse
|
38
|
Howie DW, Holubowycz OT, Callary SA, Robertson TS, Solomon LB. Highly Porous Tantalum Acetabular Components Without Ancillary Screws Have Similar Migration to Porous Titanium Acetabular Components With Screws at 2 Years: A Randomized Controlled Trial. J Arthroplasty 2020; 35:2931-2937. [PMID: 32593487 DOI: 10.1016/j.arth.2020.05.049] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2020] [Revised: 05/17/2020] [Accepted: 05/20/2020] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND It is proposed that highly porous coatings on acetabular components, such as a porous tantalum coating, provide adequate fixation without ancillary screw fixation in primary total hip arthroplasty (THA). However, tantalum acetabular components have been associated with higher rates of revision than other uncemented components in national registries. The aim of this randomized controlled trial is to determine whether the early migration of a solid-backed tantalum acetabular component was no greater than that of a titanium acetabular component with ancillary screw fixation that has proven good clinical results. METHODS Sixty-six patients aged 40 to 64 years, with osteoarthritis and Charnley grade A or B activity grade and who underwent primary THA, were recruited into the trial. Patients were randomized intraoperatively to receive either the tantalum or titanium acetabular component. All patients received the same cemented polished tapered femoral stem, 28-mm cobalt-chromium femoral head, and highly cross-linked polyethylene liner. Acetabular component migration was measured using radiostereometric analysis at 4-6 days postoperatively and at 6 weeks, 3 months, 1 and 2 years following THA. RESULTS The mean proximal migration at 2 years for the tantalum cohort was 0.17 mm (95% confidence interval, 0.09-0.24) which was no greater than that of the titanium cohort which was 0.19 mm (0.07-0.32). Harris hip scores and functional activity scores were similar between groups. CONCLUSION These results demonstrate that early stability can be achieved without ancillary screw fixation through the use of a highly porous high friction coating on a solid-backed modular acetabular component. LEVEL OF EVIDENCE Level I.
Collapse
Affiliation(s)
- Donald W Howie
- Department of Orthopaedics and Trauma, Royal Adelaide Hospital, Adelaide, South Australia, Australia; Centre for Orthopaedic and Trauma Research, The University of Adelaide, Adelaide, South Australia, Australia
| | - Oksana T Holubowycz
- Centre for Orthopaedic and Trauma Research, The University of Adelaide, Adelaide, South Australia, Australia
| | - Stuart A Callary
- Department of Orthopaedics and Trauma, Royal Adelaide Hospital, Adelaide, South Australia, Australia; Centre for Orthopaedic and Trauma Research, The University of Adelaide, Adelaide, South Australia, Australia
| | - Thomas S Robertson
- Centre for Orthopaedic and Trauma Research, The University of Adelaide, Adelaide, South Australia, Australia
| | - Lucian B Solomon
- Department of Orthopaedics and Trauma, Royal Adelaide Hospital, Adelaide, South Australia, Australia; Centre for Orthopaedic and Trauma Research, The University of Adelaide, Adelaide, South Australia, Australia
| |
Collapse
|
39
|
Li Z, Chen G, Xiang Y, Muheremu A, Wu X, He P, Fan H, Liu J, Chen C, Yang L, Wang F. Treatment of massive iliac chondrosarcoma with personalized three-dimensional printed tantalum implant: a case report and literature review. J Int Med Res 2020; 48:300060520959508. [PMID: 33050744 PMCID: PMC7570804 DOI: 10.1177/0300060520959508] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Accepted: 08/26/2020] [Indexed: 02/06/2023] Open
Abstract
Although customized three-dimensional tantalum implants have been used to treat a large variety of diseases, few reports have described the application of such implants to reconstruct large pelvic bone defects after the removal of massive tumors. We herein describe a 30-year-old woman with a 9-year history of a massive low-grade chondrosarcoma in the pelvic bone. After removal of a solid 12- × 8- × 6-cm tumor with clear margins, we used a customized three-dimensional printed tantalum implant to fill the large pelvic bone defect and performed hip arthroplasty in a one-step surgery. The patient's postoperative recovery was uneventful. She started walking 1 month after surgery, and she developed no tumor recurrence, instrumentation failure, or implant loosening during the 12-month follow-up period. This report describes the successful application of a customized three-dimensional printed implant to reconstruct a massive pelvic bone defect. Satisfactory functional recovery was achieved with no apparent complications. The methodology of the current case may benefit orthopedic and oncologic surgeons in designing treatment strategies for similar cases.
Collapse
Affiliation(s)
- Zhong Li
- Department of Orthopedics, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan Province, China
| | - Ge Chen
- Department of Orthopedics, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan Province, China
| | - Yi Xiang
- Department of Orthopaedics, The 985 Hospital of PLA, Taiyuan Shanxi, China
| | | | - Xianzhe Wu
- Chongqing Institute of Optics and Mechanics, Chongqing, China
| | - Peng He
- Chongqing ITMDC Technology Co., Ltd., Chongqing, China
| | - Huaquan Fan
- Center for Joint Surgery, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Juncai Liu
- Department of Orthopedics, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan Province, China
| | - Chang Chen
- Department of Orthopedics, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan Province, China
| | - Liu Yang
- Center for Joint Surgery, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Fuyou Wang
- Center for Joint Surgery, Southwest Hospital, Third Military Medical University, Chongqing, China
| |
Collapse
|
40
|
Baral EC, Trivellas M, Vigdorchik JM, Ricciardi BF, Wright TM, Padgett DE. Porous Coatings in Retrieved Acetabular Components. J Arthroplasty 2020; 35:2254-2258. [PMID: 32307292 DOI: 10.1016/j.arth.2020.03.036] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 03/18/2020] [Accepted: 03/20/2020] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND We evaluated bone volume fraction in retrieved acetabular shells with 2 types of porous coatings: (1) titanium fiber mesh (HG) components and (2) tantalum metal coating (TM) components. METHODS Eight HG shells were matched to 8 TM shells for patient age, body mass index, and gender. The mean age at index surgery was 69 (51-82) years, mean body mass index was 28 (21-40), and patients were evenly divided between male and female (4:4). The length of implantation was 40 (16-96) months for the TM group and 156 (108-216) months for the HG group. Shells were embedded and two 5-mm thick cross-sections were cut through the apex of each component for backscatter scanning electron microscopy assessment. Backscatter scanning electron microscopy images were segmented to threshold for metal, bone, and available space for ingrowth. Slices were assessed regionally for ingrowth at the rim, equator, and pole of the acetabular shell. Differences were assessed using general estimating equations, and P values were adjusted for multiple comparisons using the Holm-Bonferroni step-down procedure. RESULTS The mean bone volume fraction was 21 ± 17% for the HG shell and 7 ± 4% for the TM shell (P < .0001). The rim and pole regions both had less bone ingrowth than the equator. No association was found between bone ingrowth and length of implantation for either design. CONCLUSION Adequate bone ingrowth is a requirement for successful biological fixation, but the amount of ingrowth may not be a driving factor. Both implants studied had successful outcomes and long-term fixation despite the observation of low amounts of ingrowth.
Collapse
Affiliation(s)
- Elexis C Baral
- Department of Biomechanics, Hospital for Special Surgery, New York, NY
| | - Myra Trivellas
- Department of Biomechanics, Hospital for Special Surgery, New York, NY
| | - Jonathan M Vigdorchik
- Adult Reconstruction and Joint Replacement Service, Hospital for Special Surgery, New York, NY
| | - Benjamin F Ricciardi
- Adult Reconstruction and Joint Replacement Service, Hospital for Special Surgery, New York, NY
| | - Timothy M Wright
- Department of Biomechanics, Hospital for Special Surgery, New York, NY
| | - Douglas E Padgett
- Adult Reconstruction and Joint Replacement Service, Hospital for Special Surgery, New York, NY
| |
Collapse
|
41
|
Garcia IM, Souza VS, Scholten JD, Collares FM. Quantum Dots of Tantalum Oxide with an Imidazolium Ionic Liquid as Antibacterial Agent for Adhesive Resin. J Adhes Dent 2020; 22:207-214. [PMID: 32322841 DOI: 10.3290/j.jad.a44285] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
PURPOSE To synthesize tantalum oxide quantum dots (Ta2O5QDs) using an imidazolium ionic liquid as a precursor and evaluate the effect of its addition to an experimental adhesive resin on the degree of conversion (DC) and antibacterial activity. MATERIALS AND METHODS Ta2O5QDs was synthesized from the hydrolysis of an imidazolium ionic liquid (1-n-decyl-3-methylimidazolium hexachlorotantalate [DMI.TaCl6]) and evaluated by transmission electron microscopy (TEM). The adhesive was formulated with 66.7 wt% bisphenol A-glycidyl methacrylate (bis-GMA), 33.3 wt% 2-hydroxyethyl methacrylate (HEMA) with a photoinitiator/co-initiator system. In one group, Ta2O5QDS was added to the adhesive at 1 wt% Ta2O5QDs) and one group remained without Ta2O5QDS as control (CTRL). The adhesives were evaluated for DC by Fourier Transform Infrared spectroscopy. Direct contact inhibition assay was used to evaluate the antibacterial activity of the experimental adhesive resins against biofilm formation and planktonic bacteria. RESULTS Ta2O5QDs had a particle size distribution of 1.52 ± 0.73 nm. DC was 50.91 ± 4.94% for CTRL and 55.4 ± 4.58% for Ta2O5QDs (p = 0.310). Ta2O5QDs showed less Streptococcus mutans biofilm formation on adhesive surfaces (p = 0.013). There was no statistically significant difference in terms of antibacterial activity against planktonic bacteria (p = 0.079). CONCLUSION Non-agglomerated Ta2O5QDs synthesized from an imidazolium ionic liquid provided antibacterial activity to the experimental adhesive resin against biofilm formation of Streptococcus mutans.
Collapse
|
42
|
Abdelaziz H, Biewald P, Anastasiadis Z, Haasper C, Gehrke T, Hawi N, Citak M. Midterm Results After Tantalum Cones in 1-Stage Knee Exchange for Periprosthetic Joint Infection: A Single-Center Study. J Arthroplasty 2020; 35:1084-1089. [PMID: 31813812 DOI: 10.1016/j.arth.2019.11.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2019] [Revised: 10/31/2019] [Accepted: 11/09/2019] [Indexed: 02/01/2023] Open
Abstract
BACKGROUND The use of tantalum cones to reconstruct extensive bone defects in revision total knee arthroplasty has been established. We aimed to evaluate the midterm results after 1-stage knee exchange for periprosthetic joint infection using tantalum cones. METHODS Seventy-two patients (mean age, 70 ± 8.2 years) treated with a 1-stage exchange for infected total knee arthroplasty using porous tantalum cones, between 2011 and 2016, were retrospectively included. Either rotating or pure hinge system in combination with femoral and/or tibial cones was used. Survivorship analysis (septic and aseptic) was performed. Prospectively, functional outcome was assessed at a mean follow-up of 49.9 ± 18.8 months (range, 24-88). RESULTS A total of 15 patients (21%) were rerevised, 8 (11.1%) for infection and 7 (10%) for aseptic loosening, requiring cone exchange in 12 patients (17%). Cone-related survival free from any revision was 83% ± 3.8 standard deviation (95% confidence interval, 74-90), and infection-free survival was 89% ± 4.2 standard deviation (95% confidence interval, 76-93). No significant correlation was reported between the types of prosthesis used (P = .8) or implanted cones and failure (P = .6). History of a previous septic revision increased the risk of cone revision after the index surgery (P < .001). Preoperative Hospital for Special Surgery knee score improved from 47 ± 16 (range, 14-87) to 60 ± 17 (range, 24-84) points at the latest follow-up. CONCLUSION First study reports on outcomes of the 1-stage exchange using tantalum cones for knee periprosthetic joint infection with additional severe bone loss. Midterm cone-related and infection-free survival offered good results and provided reasonable functional outcomes.
Collapse
Affiliation(s)
- Hussein Abdelaziz
- Department of Orthopaedic Surgery, Helios ENDO-Klinik Hamburg, Hamburg, Germany
| | - Philipp Biewald
- Department of Orthopaedic Surgery, Helios ENDO-Klinik Hamburg, Hamburg, Germany
| | - Zoy Anastasiadis
- Department of Orthopaedic Surgery, Clínica Alemana, Universidad del Desarrollo, Santiago, Chile
| | - Carl Haasper
- Department of Orthopaedic Surgery, AMEOS Klinikum Seepark, Geestland, Germany
| | - Thorsten Gehrke
- Department of Orthopaedic Surgery, Helios ENDO-Klinik Hamburg, Hamburg, Germany
| | - Nael Hawi
- Department of Trauma Surgery, Hannover Medical School, Hannover, Germany
| | - Mustafa Citak
- Department of Orthopaedic Surgery, Helios ENDO-Klinik Hamburg, Hamburg, Germany
| |
Collapse
|
43
|
Musil D, Trnka T, Klouda J, PertlÍČek J, Held M, StehlÍk J. [Outcomes of Revisions of the Acetabular Component of THA with Paprosky Type 3a and 3b Defects Using Tantalum Trabecular Metal Implants 2-10 Years Postoperatively]. Acta Chir Orthop Traumatol Cech 2020; 87:387-395. [PMID: 33408003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
PURPOSE OF THE STUDY Tantallum trabecular metal implants (Trabecular Metal Technology - TMT) considerably changed the acetabular reconstruction options in revision surgeries with extensive bone defects and distorted pelvic ring integrity. The purpose of this study is to ascertain the short-term to medium-term outcomes of acetabular reconstruction through TMT implants in patients with Paprosky type 3a and 3b acetabular defects and in case of pelvic discontinuity. MATERIAL AND METHODS The prospective monocentric study included patients in whom the revision of acetabular components in total hip arthroplasty was performed, the acetabular defect was classified as Paprosky 3a and higher, a TMT implant was used for reconstruction, and the follow-up period was at least 2 years after surgery. In total, 87 patients who had met the inclusion criteria were operated on and followed-up. The patients in the study group underwent a clinical examination, an X-ray and also an assessment using the Harris hip score. Moreover, the patients were asked about their satisfaction with the surgical outcome, their willingness to undergo the same procedure again in case of difficulties, and they were also asked to rate the outcome in percentage term and by assigning grades. Also, an analysis of the reasons for revision and subsequent complications was carried out. Implant integration and its migration were evaluated on an X-ray. RESULTS 32 men and 55 women were subjects to evaluation, with a balanced number of operated sides (44:43 in favour of the right side). One-stage procedures prevailed, which were performed in a total of 74 cases, while two-stage revisions were performed in 13 cases in the study group. In three patients (3.5%) pelvic discontinuity was diagnosed, 69 patients (79%) suffered from Paprosky 3a defect and 15 patients (17%) from Paprosky 3b defect. The first patients underwent surgery in 2009 and the mean follow-up period in the study group was 48 months. In 1 patient the TMT implant was removed for infectious complications, in the remaining part of the group the TMT implant was fully integrated with no signs of loosening or migration in the monitored period. In the assessment using the Harris hip score, the mean score of 80.4 (range 36-99) was achieved. When assessing the satisfaction with the surgical outcome, the mean value achieved was 94.4%, and the mean assigned grade was 1.26 (on a school grading scale). DISCUSSION Extensive bone defects and pelvic discontinuity represent an issue in revisions of the acetabular component in total hip arthroplasty. There are several options how to address these conditions. State-of-the-art TMT implants thanks to their shortterm and medium-term outcomes appear as one of the most beneficial option with a low failure rate both in our study group and in published papers. CONCLUSIONS Evaluation of this monocentric prospective study reveals encouraging short-term and medium-term outcomes of the use of TMT implants in managing extensive acetabular bone defects of Paprosky 3a and 3b type and supports their further introduction into practice at our department. Key words: total hip arthroplasty (THA), revision implantation, TMT implant.
Collapse
Affiliation(s)
- D Musil
- Ortopedické oddělení, Nemocnice České Budějovice, a.s
| | | | | | | | | | | |
Collapse
|
44
|
Zhao D, Cheng L, Yang L, Wang B, Liu B. The Combined Therapy of Tantalum Rod Implantation and Vascularized Bone Transplantation for Femoral Head Osteonecrosis: A Retrospective Long-Term Follow-Up Survival Analysis. Surg Technol Int 2019; 35:406-409. [PMID: 31687779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Tantalum rod implantation with vascularized bone transplantation has been reported to be an effective method for the treatment of osteonecrosis of the femoral head (ONFH). However, long-term follow-up results were unclear. Sixty-five patients (71 hips) with ONFH treated with this technique were retrospectively reviewed. According to the Association Research Circulation Osseous (ARCO) classification, 21 hips were stage II, 30 were stage III, and 15 were stage IV. Sixty-one patients (66 hips) were followed for more than 10 years. Fifteen hips had to be converted to total hip arthroplasty (THA), the proportion of THA conversion surgery over 10 years postoperative was 4.76% for stage II, 16.7% for stage III, and 60% for stage IV, respectively. The 10-year joint-preserving success rate of the entire group was 77.2%. The Harris Hip Score (HHS) in the patients not receiving THA therapy increased from a mean of 51.35 points (ranged from 32 to 62 points) to 90.12 points (ranged from 72 to 99 points). The technique of tantalum rod implantation with vascularized bone grafting was an effective joint-preserving method for the treatment of ARCO stage II-III ONFH.
Collapse
Affiliation(s)
- Dewei Zhao
- Department of Orthopaedics, Affiliated Zhongshan Hospital of Dalian University, Dalian, China
| | - Liangliang Cheng
- Department of Orthopaedics, Affiliated Zhongshan Hospital of Dalian University, Dalian, China
| | - Lei Yang
- Department of Orthopaedics, Affiliated Zhongshan Hospital of Dalian University, Dalian, China
| | - Benjie Wang
- Department of Orthopaedics, Affiliated Zhongshan Hospital of Dalian University, Dalian, China
| | - Baoyi Liu
- Department of Orthopaedics, Affiliated Zhongshan Hospital of Dalian University, Dalian, China
| |
Collapse
|
45
|
Galasso O, De Gori M, Cerbasi S, Familiari F, Recano P, Balato G, Gasparini G, Mariconda M. Tantalum monoblock cups in total hip arthroplasty: clinical results and outcome predictors. J BIOL REG HOMEOS AG 2018; 32:29-34. [PMID: 30644278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
This study aims to report the minimum 2-year follow-up results of the tantalum monoblock cup in primary THA and to identify possible outcome predictors. Eighty-eight porous tantalum monoblock acetabular cup in primary THA were reviewed. The Harris Hip Score (HHS) and the Short Form-36 Health Survey (SF-36) were used for the evaluation of outcomes. Radiographic evaluation included acetabular component orientation, presence of bone gaps, radiolucent lines, new bone formation and heterotopic ossifications. After a mean follow-up of 55.4±19.5 months, no component revision was noted. The HHS improved from 43.6±14.6 to 88.3±8.4 (P less than 0.001). The mean physical domain of the SF-36 did not significantly differ from that of age-matched, healthy subjects (P=0.072); the mean mental component of the SF-36 was significantly higher than that of age-matched, healthy subjects (P less than 0.001). Negative determinants of postoperative HHS (total adjusted R2=0.328) using tantalum monoblock cups were age at surgery (R2=0.164, P less than 0.001), female sex (R2=0.103, P less than 0.001), and acetabular inclination (R2=0.084, P equals 0.003).
Collapse
Affiliation(s)
- O Galasso
- Department of Orthopaedic and Trauma Surgery, "Magna Graecia" University, Catanzaro, Italy
| | - M De Gori
- Department of Orthopaedic and Trauma Surgery, "S. Francesco di Paola" Hospital, Paola, Italy
| | - S Cerbasi
- Department of Orthopaedic and Trauma Surgery, "Federico II" University, Naples, Italy
| | - F Familiari
- Department of Orthopaedic and Trauma Surgery, "Villa del Sole" Clinic, Catanzaro, Italy
| | - P Recano
- Department of Orthopaedic and Trauma Surgery, "Federico II" University, Naples, Italy
| | - G Balato
- Department of Orthopaedic and Trauma Surgery, "Federico II" University, Naples, Italy
| | - G Gasparini
- Department of Orthopaedic and Trauma Surgery, "Magna Graecia" University, Catanzaro, Italy
| | - M Mariconda
- Department of Orthopaedic and Trauma Surgery, "Federico II" University, Naples, Italy
| |
Collapse
|
46
|
Chang CH, Hu CC, Chen CC, Mahajan J, Chang Y, Shih HN, Kwon YM. Revision Total Hip Arthroplasty for Paprosky Type III Acetabular Defect With Structural Allograft and Tantalum Trabecular Metal Acetabular Cup. Orthopedics 2018; 41:e861-e867. [PMID: 30371922 DOI: 10.3928/01477447-20181023-02] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Accepted: 06/28/2018] [Indexed: 02/03/2023]
Abstract
There are several surgical options for addressing Paprosky type III acetabular defects during revision total hip arthroplasty. In physiologically young and active patients, using structural bone graft to restore bone defects and provide adequate initial support for the revision acetabular component is one such option. This study reports the mid-term results of using a structural allograft accompanied by a trabecular metal-coated hemispherical cup for Paprosky type III defects. A retrospective analysis was performed of the data collected for 20 consecutive hips in 20 patients (mean age, 56.2 years; range, 43-68 years) with minimum 3-year follow-up (mean, 5.4 years; range, 3.3-10.3 years) who had a structural allograft accompanied by a trabecular metal-coated hemispherical cup for Paprosky type III defects. Only 1 hip had cup migration, which was less than 3 mm in vertical and less than 5° in inclination and recognized as loosening without symptoms. All grafts showed good incorporation with trabecular bridging over the graft and host bone. The mean modified Harris hip score showed significant improvement, from 29.7 (range, 11-52) preoperatively to 84.1 (range, 77-91) at the latest follow-up (P<.05). The use of a structural allograft combined with a tantalum trabecular metal acetabular cup in acetabular revision for Paprosky type III defects had a satisfactory mid-term clinical result. This is a viable option for patients with large acetabular shelf defects. [Orthopedics. 2018; 41(6):e861-e867.].
Collapse
|
47
|
Liu Q, Zhang YN, Li HJ, Liu J, Ruan JM, Zhou XW. [Evaluation of osseointegration of domestic porous tantalum-niobium alloy]. Shanghai Kou Qiang Yi Xue 2018; 27:477-481. [PMID: 30680389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
PURPOSE To evaluate the osseointegration of domestic porous tantalum-niobium(PTa-Nb) alloy. METHODS A total of 36 adult New Zealand rabbits were selected and divided into 3 groups. Pta-Nb rods(3.5 mm×10 mm) were implanted into the femoral condyle of each rabbit.The rabbits were sacrificed successively at 4,8,12 weeks after operation. X-ray, hard tissue slices stained with toluidine blue, scanning electron microscope(SEM), X-ray energy disperse spectroscopy(XEDS) and push-out test were used to test the osseointegration of PTa-Nb. SPSS19.0 software package was used for statistical analysis. RESULTS X-ray films showed no obvious inflammation,as well as implants loosing and bone resorption. Density of the bone around implants increased. Hard tissue slices displayed chimeric shape in the implant-bone interface. New bone contacted directly to the surface of PTa-Nb and got more and more closer with the increase of healing time. Osteoid formed in the inner pores at 4 weeks after operation,and more mature bone tissue grew into inner part of PTa-Nb at 12 weeks. SEM showed bone tissue was more denser and closer to the Pta-Nb,which was similar to the results of hard tissue slices. XEDS analysis showed the percent content of the calcium and phosphate of the tissue within PTa-Nb increased gradually in the three groups.The ratio of Ca/P at 8 and 12 weeks was significantly higher than at 4 weeks (P<0.05); Push-out test showed the shear-strength of PTa-Nb implants increased from (8.26±0.75) MPa at 4 weeks to (21.04±1.46) MPa at 12 weeks (P<0.05). CONCLUSIONS The domestic PTa-Nb alloy has good osseointegration with both bone tissue ongrowth and ingrowth,which may be a high potential biomimetic bone material.
Collapse
Affiliation(s)
- Qiang Liu
- Department of Stomatology, Mianyang Central Hospital. Mianyang 621000, Sichuan Province, China. E-mail:
| | | | | | | | | | | |
Collapse
|
48
|
Affiliation(s)
- Nils Hailer
- Orthopaedics/Department of Surgical Sciences Uppsala University Hospital
| |
Collapse
|
49
|
Nordstrom B, Shoji T, Anderson WC, Fields HW, Beck FM, Kim DG, Takano-Yamamoto T, Deguchi T. Comparison of changes in irregularity and transverse width with nickel-titanium and niobium-titanium- tantalum-zirconium archwires during initial orthodontic alignment in adolescents: A double-blind randomized clinical trial. Angle Orthod 2018; 88:348-354. [PMID: 29504810 DOI: 10.2319/061417-393.1] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVES The purpose of this prospective, double-blind, randomized clinical trial was to compare the clinical efficiency of nickel-titanium (NiTi) and niobium-titanium-tantalum-zirconium (TiNbTaZr) archwires during initial orthodontic alignment. MATERIALS AND METHODS All subjects (ages between 12 and 20 years) underwent nonextraction treatment using 0.022-inch brackets. All patients were randomized into two groups for initial alignment with 0.016-inch NiTi archwires (n = 14), or with 0.016-inch TiNbTaZr archwires (n = 14). Digital scans were taken during the course of treatment and were used to compare the improvement in Little's Irregularity Index and the changes in intercanine and intermolar widths. RESULTS There was approximately a 27% reduction in crowding during the first month with the use of 0.016-inch TiNbTaZr (Gummetal) wire, and an additional 25% decrease in crowding was observed during the next month. There was no significant difference between the two treatment groups in the decrease in irregularity over time ( P = .29). There was no significant difference between the two groups in the changes in intercanine and intermolar width ( P = .80). CONCLUSIONS It can be concluded that Gummetal wires and conventional NiTi wires possess a similar ability to align teeth, and Gummetal wires have additional advantages over conventional NiTi, such as formability and use in patients with nickel allergy.
Collapse
|
50
|
Gan HQ, Wang Q, Zhang H, Liu X, Deng HM, Song HP, Wang ZQ, Li QJ. [Effects of RGD peptides-grafted porous tantalum on morphological change of MG63 osteoblasts-tantalum conjunctive interface and expression of osteogenesis factors]. Beijing Da Xue Xue Bao Yi Xue Ban 2018; 50:176-182. [PMID: 29483743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
OBJECTIVE To investigate the effects of the Arg-Gly-Asp polypeptedes (RGD) peptides-modified porous tantalum surface on osteoblasts morphology and expressions of osteogenesis factors, and to evaluate RGD peptides promotes junctura ossium of tantalum-bone interface in vivo. METHODS RGD peptides of different concentrations (1 g/L, 5 g/L, and 10 g/L) were loaded to porous tantalum slices with a diameter of 10 mm and a thickness of 3 mm by physical absorption. The 3rd generation of MG63 cells were co-cultured with tantalum and divided into 4 groups: Ta-cells (control) group, 1 g/L cells/Ta/RGD group, 5 g/L cells/Ta/RGD group, and 10 g/L cells/Ta/RGD group. Porous tantalum compo-sites and osteoblasts-tantalum interface were observed by scanning electron microscopy. The adhesion rate of osteoblasts was detected and immunocytochemistry was used to detect the expressions of filamentous actin (F-actin), osteocalcin (OC) and fibronectin (FN). RESULTS The scanning electron microscope (SEM) revealed that osteoblasts distributed on the surface of porous tantalum and secreted extracellular matrix on outside and inner of micro-pores. The osteoblasts adhesion rate on porous tantalum modified with RGD was higher than that in the unmodified porous tantalum at the end of 24, 48, and 72 hours. The best adhesion effect was got in 5 g/L cells/Ta/RGD group at hour 48 [(68.07±3.80) vs. (23.40±4.39), P<0.05]. The results of immunocytochemistry showed that the expressions intensity of F-actin, OC and FN in osteoblasts on porous tantalum modified groups with RGD were stronger than that in the unmodified groups, and the expressions of 5 g/L cells/Ta/RGD group were significantly higher than those in the 10 g/L group and 1 g/L group [OC: (18.08±0.08) vs. (15.14±0.19), P<0.05; (18.08±0.08) vs. (14.04±0.61), P<0.05. FN: (24.60±0.98) vs. (15.90±0.53), P<0.05; (24.60±0.98) vs. (15.30±0.42), P<0.05. F-actin: (29.20±1.31) vs. (24.50±1.51), P<0.05; (29.20±1.31) vs. (16.92±0.40), P<0.05]. Correspondingly F-actin in osteoblasts was showed in longitudinal arrangement, and the expressions intensity was stronger than those OC and FN. CONCLUSION The RGD peptides is beneficial to enhance adhesion of osteoblast, spreading and reorganization of cytoskeleton on porous tantalum surface and improve the interface morphology, further promoting osteoblasts-tantalum conjunctive interface osseointegration.
Collapse
Affiliation(s)
- H Q Gan
- Department of Orthopaedics, Affiliated Hospital, North China University of Science and Technology, Tangshan 063000, Hebei, China
| | - Q Wang
- Department of Anatomy, Basic Medical College, North China University of Science and Technology, Tangshan 063000, Hebei, China
| | - H Zhang
- Department of Joint Surgery, the Second Hospital of Tangshan, Tangshan 063000, Hebei, China
| | - X Liu
- Department of Clinical Laboratory, Kailuan General Hospital, Tangshan 063000, Hebei, China
| | - H M Deng
- Department of Orthopaedics, Affiliated Hospital, North China University of Science and Technology, Tangshan 063000, Hebei, China
| | - H P Song
- Department of Orthopaedics, Affiliated Hospital, North China University of Science and Technology, Tangshan 063000, Hebei, China
| | - Z Q Wang
- Department of Orthopaedics, Affiliated Hospital, North China University of Science and Technology, Tangshan 063000, Hebei, China
| | - Q J Li
- Experimental Center, North China University of Science and Technology; Tangshan 063000, Hebei, China
| |
Collapse
|