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Özcan EC, Aydin MA, Dundar S, Tanrisever M, Bal A, Karasu N, Kirtay M. Biomechanical Investigation of the Osseointegration of Titanium Implants With Different Surfaces Placed With Allogeneic Bone Transfer. J Craniofac Surg 2024:00001665-990000000-01630. [PMID: 38781429 DOI: 10.1097/scs.0000000000010326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Accepted: 04/13/2024] [Indexed: 05/25/2024] Open
Abstract
Allogeneic grafts can be preferred to autogenous grafts in plastic and oral-maxillofacial surgery for vertical and horizontal bone deficiencies. Implant surface properties are an important factor in osseointegration. This study aims to evaluate the osseointegration levels of titanium implants with machined, sand-blasted, and acid-etched (SLA) and resorbable blast material (RBM) surfaces placed together with allogeneic bone tissue transplantations obtained from the tibia bone using biomechanical method. Twenty-five female Sprague-Dawley rats were included in the study. The rats were divided into groups in which machined (n=7), SLA (n=7), and RBM (n=7) surface implants were placed with the transplantation of bone taken from the tibia. Four rats (both left and right tibias) were used as donors. Grafts and implants were surgically placed in the corticocancellous part of the metaphyseal area of the tibia bones of rats. At the end of the 4-week experimental setup, all rats were killed, and the implants and surrounding bone tissue were subjected to biomechanical reverse torque analysis (N/cm). Sand-blasted acid-etched surface implants were observed to have higher biomechanical osseointegration levels than RBM and machined surface implants (P<0.05). No statistical difference could be detected between the RBM and machined surface implants (P>0.05). On the basis of the limited results of this study, it can be concluded that the osseointegration levels of SLA surface implants placed with allogeneic bone transplantation may be better than those of machined and RBM surface implants.
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Affiliation(s)
- Erhan Cahit Özcan
- Department of Esthetic, Plastic and Reconstructive Surgery, Faculty of Medicine
| | | | | | - Murat Tanrisever
- Department of Surgery, Faculty of Veterinary Medicine, Firat University, Elazig
| | - Ali Bal
- Department of Esthetic, Plastic and Reconstructive Surgery, Private Practice, Istanbul
| | - Necmettin Karasu
- Department of Esthetic, Plastic and Reconstructive Surgery, Private Practice, Afyon Karahisar, Turkiye
| | - Mustafa Kirtay
- Department of Oral and Maxillofacial Surgery, Private Practice, London, Ontario, Canada
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García-Lamas L, Lozano D, Jiménez-Díaz V, Bravo-Giménez B, Sánchez-Salcedo S, Jiménez-Holguín J, Abella M, Desco M, Vallet-Regi M, Cecilia-López D, Salinas AJ. Enriched mesoporous bioactive glass scaffolds as bone substitutes in critical diaphyseal bone defects in rabbits. Acta Biomater 2024; 180:104-114. [PMID: 38583750 DOI: 10.1016/j.actbio.2024.04.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 03/23/2024] [Accepted: 04/02/2024] [Indexed: 04/09/2024]
Abstract
In the field of orthopedic surgery, there is an increasing need for the development of bone replacement materials for the treatment of bone defects. One of the main focuses of biomaterials engineering are advanced bioceramics like mesoporous bioactive glasses (MBG´s). The present study compared the new bone formation after 12 weeks of implantation of MBG scaffolds with composition 82,5SiO2-10CaO-5P2O5-x 2.5SrO alone (MBGA), enriched with osteostatin, an osteoinductive peptide, (MBGO) or enriched with bone marrow aspirate (MBGB) in a long bone critical defect in radius bone of adult New Zealand rabbits. New bone formation from the MBG scaffold groups was compared to the gold standard defect filled with iliac crest autograft and to the unfilled defect. Radiographic follow-up was performed at 2, 6, and 12 weeks, and microCT and histologic examination were performed at 12 weeks. X-Ray study showed the highest bone formation scores in the group with the defect filled with autograft, followed by the MBGB group, in addition, the microCT study showed that bone within defect scores (BV/TV) were higher in the MBGO group. This difference could be explained by the higher density of newly formed bone in the osteostatin enriched MBG scaffold group. Therefore, MBG scaffold alone and enriched with osteostatin or bone marrow aspirate increase bone formation compared to defect unfilled, being higher in the osteostatin group. The present results showed the potential to treat critical bone defects by combining MBGs with osteogenic peptides such as osteostatin, with good prospects for translation into clinical practice. STATEMENT OF SIGNIFICANCE: Treatment of bone defects without the capacity for self-repair is a global problem in the field of Orthopedic Surgery, as evidenced by the fact that in the U.S alone it affects approximately 100,000 patients per year. The gold standard of treatment in these cases is the autograft, but its use has limitations both in the amount of graft to be obtained and in the morbidity produced in the donor site. In the field of materials engineering, there is a growing interest in the development of a bone substitute equivalent. Mesoporous bioactive glass (MBG´s) scaffolds with three-dimensional architecture have shown great potential for use as a bone substitutes. The osteostatin-enriched Sr-MBG used in this long bone defect in rabbit radius bone in vivo study showed an increase in bone formation close to autograft, which makes us think that it may be an option to consider as bone substitute.
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Affiliation(s)
- Lorena García-Lamas
- Servicio de Cirugía Ortopédica y Traumatología. Hospital Universitario 12 de Octubre, Madrid, España; Instituto de Investigación I+12, Madrid, España.
| | - Daniel Lozano
- Instituto de Investigación I+12, Madrid, España; Departamento de Química en Ciencias Farmacéuticas, Universidad Complutense de Madrid, Spain; Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Instituto de Salud Carlos III, España
| | - Verónica Jiménez-Díaz
- Servicio de Cirugía Ortopédica y Traumatología. Hospital Universitario 12 de Octubre, Madrid, España; Instituto de Investigación I+12, Madrid, España
| | - Beatriz Bravo-Giménez
- Servicio de Cirugía Ortopédica y Traumatología. Hospital Universitario 12 de Octubre, Madrid, España; Instituto de Investigación I+12, Madrid, España
| | - Sandra Sánchez-Salcedo
- Instituto de Investigación I+12, Madrid, España; Departamento de Química en Ciencias Farmacéuticas, Universidad Complutense de Madrid, Spain; Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Instituto de Salud Carlos III, España
| | - Javier Jiménez-Holguín
- Instituto de Investigación I+12, Madrid, España; Departamento de Química en Ciencias Farmacéuticas, Universidad Complutense de Madrid, Spain; Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Instituto de Salud Carlos III, España
| | - Mónica Abella
- Departamento de Bioingeniería, Universidad Carlos III de Madrid, España; Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, España
| | - Manuel Desco
- Departamento de Bioingeniería, Universidad Carlos III de Madrid, España; Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, España
| | - María Vallet-Regi
- Instituto de Investigación I+12, Madrid, España; Departamento de Química en Ciencias Farmacéuticas, Universidad Complutense de Madrid, Spain; Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Instituto de Salud Carlos III, España
| | - David Cecilia-López
- Servicio de Cirugía Ortopédica y Traumatología. Hospital Universitario 12 de Octubre, Madrid, España; Instituto de Investigación I+12, Madrid, España
| | - Antonio Jesús Salinas
- Instituto de Investigación I+12, Madrid, España; Departamento de Química en Ciencias Farmacéuticas, Universidad Complutense de Madrid, Spain; Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Instituto de Salud Carlos III, España.
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Zhu H, Wang J, Wang S, Yang Y, Chen M, Luan Q, Liu X, Lin Z, Hu J, Man K, Zhang J. Additively manufactured bioceramic scaffolds based on triply periodic minimal surfaces for bone regeneration. J Tissue Eng 2024; 15:20417314241244997. [PMID: 38617462 PMCID: PMC11010742 DOI: 10.1177/20417314241244997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Accepted: 03/19/2024] [Indexed: 04/16/2024] Open
Abstract
The study focused on the effects of a triply periodic minimal surface (TPMS) scaffolds, varying in porosity, on the repair of mandibular defects in New Zealand white rabbits. Four TPMS configurations (40%, 50%, 60%, and 70% porosity) were fabricated with β-tricalcium phosphate bioceramic via additive manufacturing. Scaffold properties were assessed through scanning electron microscopy and mechanical testing. For proliferation and adhesion assays, mouse bone marrow stem cells (BMSCs) were cultured on these scaffolds. In vivo, the scaffolds were implanted into rabbit mandibular defects for 2 months. Histological staining evaluated osteogenic potential. Moreover, RNA-sequencing analysis and RT-qPCR revealed the significant involvement of angiogenesis-related factors and Hippo signaling pathway in influencing BMSCs behavior. Notably, the 70% porosity TPMS scaffold exhibited optimal compressive strength, superior cell proliferation, adhesion, and significantly enhanced osteogenesis and angiogenesis. These findings underscore the substantial potential of 70% porosity TPMS scaffolds in effectively promoting bone regeneration within mandibular defects.
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Affiliation(s)
- Hong Zhu
- The First Dongguan Affiliated Hospital, Guangdong Medical University, Dongguan, P.R. China
| | - Jinsi Wang
- The First Dongguan Affiliated Hospital, Guangdong Medical University, Dongguan, P.R. China
| | - Shengfa Wang
- Dalian University of Technology, Dalian, P.R. China
| | - Yue Yang
- The First Dongguan Affiliated Hospital, Guangdong Medical University, Dongguan, P.R. China
| | - Meiyi Chen
- The First Dongguan Affiliated Hospital, Guangdong Medical University, Dongguan, P.R. China
| | - Qifei Luan
- The First Dongguan Affiliated Hospital, Guangdong Medical University, Dongguan, P.R. China
| | - Xiaochuan Liu
- The First Dongguan Affiliated Hospital, Guangdong Medical University, Dongguan, P.R. China
| | - Ziheng Lin
- The First Dongguan Affiliated Hospital, Guangdong Medical University, Dongguan, P.R. China
| | - Jiaqi Hu
- The First Dongguan Affiliated Hospital, Guangdong Medical University, Dongguan, P.R. China
| | - Kenny Man
- Department of Oral and Maxillofacial Surgery & Special Dental Care University Medical Center Utrecht, Utrecht, The Netherlands
- Regenerative Medicine Center Urecht, Utrecht, The Netherlands
| | - Jingying Zhang
- The First Dongguan Affiliated Hospital, Guangdong Medical University, Dongguan, P.R. China
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Gholami M, Ahrari F, Sedigh HS, Bourauel C. Micro-computed tomography analysis of mineral attachment to the implants augmented by three types of bone grafts: An experimental study in dogs. Dent Res J (Isfahan) 2023; 20:100. [PMID: 38020252 PMCID: PMC10630541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2022] [Revised: 07/22/2023] [Accepted: 07/26/2023] [Indexed: 12/01/2023] Open
Abstract
Background This study compared the effect of various grafting materials on the area and volume of minerals attached to dental implants. Materials and Methods In this animal study, 13 dogs were divided into three groups according to the time of sacrificing (2 months, 4 months, or 6 months). The implants were placed in oversized osteotomies, and the residual defects were filled with autograft, bovine bone graft (Cerabone), or a synthetic substitute (Osteon II). At the designated intervals, the dogs were sacrificed and the segmented implants underwent micro-computed tomography analysis. The bone-implant area (BIA) and bone-implant volume (BIV) of bone and graft material were calculated in the region of interest around the implant. The data were analyzed by two-way analysis of variance (ANOVA) at P < 0.05. Results There was no significant difference in BIA and BIV between the healing intervals for any of the grafting materials (P > 0.05). ANOVA exhibited comparable BIA and BIV between the grafting materials at 2 and 4 months after surgery (P > 0.05), although a significant difference was observed after 6 months (P < 0.05). Pairwise comparisons revealed that BIA was significantly greater in the autograft-stabilized than the synthetic-grafted sites (P = 0.035). The samples augmented with autograft also showed significantly higher BIV than those treated by the xenogenic (P = 0.017) or synthetic (P = 0.002) particles. Conclusion All graft materials showed comparable performance in providing mineral support for implants up to 4 months after surgery. At the long-term (6-month) interval, autogenous bone demonstrated significant superiority over xenogenic and synthetic substitutes concerning the bone area and volume around the implant.
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Affiliation(s)
- Mahdi Gholami
- Oral and Maxillofacial Disease Research Center, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
- Department of Oral Technology, School of Dentistry, University Hospital of Bonn, Bonn, Germany
| | - Farzaneh Ahrari
- Dental Research Center, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Hamideh Salari Sedigh
- Department of Clinical Sciences, School of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Christoph Bourauel
- Department of Oral Technology, School of Dentistry, University Hospital of Bonn, Bonn, Germany
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Zhang Y, Jiang S, Xu D, Li Z, Guo J, Li Z, Cheng G. Application of Nanocellulose-Based Aerogels in Bone Tissue Engineering: Current Trends and Outlooks. Polymers (Basel) 2023; 15:polym15102323. [PMID: 37242898 DOI: 10.3390/polym15102323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 05/07/2023] [Accepted: 05/09/2023] [Indexed: 05/28/2023] Open
Abstract
The complex or compromised bone defects caused by osteomyelitis, malignant tumors, metastatic tumors, skeletal abnormalities, and systemic diseases are difficult to be self-repaired, leading to a non-union fracture. With the increasing demands of bone transplantation, more and more attention has been paid to artificial bone substitutes. As biopolymer-based aerogel materials, nanocellulose aerogels have been widely utilized in bone tissue engineering. More importantly, nanocellulose aerogels not only mimic the structure of the extracellular matrix but could also deliver drugs and bioactive molecules to promote tissue healing and growth. Here, we reviewed the most recent literature about nanocellulose-based aerogels, summarized the preparation, modification, composite fabrication, and applications of nanocellulose-based aerogels in bone tissue engineering, as well as giving special focus to the current limitations and future opportunities of nanocellulose aerogels for bone tissue engineering.
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Affiliation(s)
- Yaoguang Zhang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST), Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan 430079, China
- Department of Orthodontics, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University, Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration & Shandong Provincial Clinical Research Center for Oral Diseases, Jinan 250012, China
| | - Shengjun Jiang
- Department of Stomatology, Renmin Hospital of Wuhan University, Wuhan 430079, China
| | - Dongdong Xu
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou 325015, China
| | - Zubing Li
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST), Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan 430079, China
| | - Jie Guo
- Department of Orthodontics, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University, Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration & Shandong Provincial Clinical Research Center for Oral Diseases, Jinan 250012, China
| | - Zhi Li
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST), Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan 430079, China
| | - Gu Cheng
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST), Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan 430079, China
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Cohen DJ, Lohmann CH, Scott KM, Olson LC, Boyan BD, Schwartz Z. Osseointegration and Remodeling of Mineralized Bone Graft Are Negatively Impacted by Prior Treatment with Bisphosphonates. J Bone Joint Surg Am 2022; 104:1750-1759. [PMID: 35983995 PMCID: PMC10007861 DOI: 10.2106/jbjs.21.01489] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND Bisphosphonates limit resorption by inhibiting osteoclast formation and activation. They are removed during preparation of demineralized bone matrix (DBM) particles, but it is not known if osteogenesis and incorporation of mineralized bone allografts from patients treated with oral bisphosphonates are affected in vivo. METHODS Human block allografts from 3 bisphosphonate-treated donors and 3 age and sex-matched control donors who had not received bisphosphonates were obtained (Musculoskeletal Transplant Foundation); one-half from each donor was demineralized. In the first study, 3 × 2-mm mineralized and demineralized cylindrical grafts were implanted bilaterally in the femoral metaphysis of 56 rats. In the second study, samples from each group were pooled, prepared as particles, and implanted bilaterally in the femoral marrow canal of 24 rats. Osseointegration, defined as native bone in contact with allograft, was assessed at 10 weeks by micro-computed tomography (CT) and histomorphometry. RESULTS Micro-CT showed greater bone volume in sites treated with demineralized samples compared with the control mineralized and bisphosphonate-exposed mineralized samples. More new bone was generated along the cortical-endosteal interface compared with mineralized samples. Histology showed significantly less new bone in contact with the mineralized bisphosphonate-exposed allograft (10.4%) compared with mineralized samples that did not receive bisphosphonates (22.8%) and demineralized samples (31.7% and 42.8%). A gap was observed between native bone and allograft in the bisphosphonate-exposed mineralized samples (0.50 mm 2 ). The gap area was significantly greater compared with mineralized samples that did not receive bisphosphonates (0.16 mm 2 ) and demineralized samples (0.10 and 0.03 mm 2 ). CONCLUSIONS Mineralized allografts were osseointegrated, but not remodeled or replaced by living bone, preventing full regeneration of the bone defect. Prior treatment of the donor with bisphosphonates affected osteogenesis, preventing osteointegration and remodeling of the allograft into the regenerating bone. CLINICAL RELEVANCE Clinical use of mineralized allografts from patients who had received bisphosphonate therapy needs to be evaluated; in this animal model, such grafts were not integrated into the host bone or remodeled, and full regeneration of the bone defects was prevented.
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Affiliation(s)
- D Joshua Cohen
- Department of Biomedical Engineering, College of Engineering, Virginia Commonwealth University, Richmond, Virginia
| | - Christoph H Lohmann
- Department of Orthopaedics, Otto-von-Guericke University, Magdeburg, Germany
| | - Kayla M Scott
- Department of Biomedical Engineering, College of Engineering, Virginia Commonwealth University, Richmond, Virginia
| | - Lucas C Olson
- Department of Biomedical Engineering, College of Engineering, Virginia Commonwealth University, Richmond, Virginia
| | - Barbara D Boyan
- Department of Biomedical Engineering, College of Engineering, Virginia Commonwealth University, Richmond, Virginia.,Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, Georgia
| | - Zvi Schwartz
- Department of Biomedical Engineering, College of Engineering, Virginia Commonwealth University, Richmond, Virginia.,Department of Periodontics, University of Texas Health Science Center at San Antonio, San Antonio, Texas
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Wickramasinghe ML, Dias GJ, Premadasa KMGP. A novel classification of bone graft materials. J Biomed Mater Res B Appl Biomater 2022; 110:1724-1749. [DOI: 10.1002/jbm.b.35029] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2021] [Revised: 01/20/2022] [Accepted: 01/21/2022] [Indexed: 12/19/2022]
Affiliation(s)
- Maduni L. Wickramasinghe
- Department of Biomedical Engineering General Sir John Kotelawala Defense University Ratmalana Sri Lanka
| | - George J. Dias
- Department of Anatomy, School of Medical Sciences University of Otago Dunedin New Zealand
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Berger MB, Cohen DJ, Levit MM, Puetzer JL, Boyan BD, Schwartz Z. Hydrophilic implants generated using a low-cost dielectric barrier discharge plasma device at the time of placement exhibit increased osseointegration in an animal pre-clinical study: An effect that is sex-dependent. Dent Mater 2022; 38:632-645. [PMID: 35184898 PMCID: PMC9123943 DOI: 10.1016/j.dental.2022.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 02/08/2022] [Indexed: 11/28/2022]
Abstract
OBJECTIVES Increased wettability of titanium and titanium alloy surfaces due to processing and storage methods increases osteoprogenitor cell differentiation and osseointegration compared to microroughness alone. Implants that are exposed to air have a hydrophobic surface due to adsorption of atmospheric hydrocarbons, which can limit overall implant success. Dielectric barrier discharge plasma (DBD) is one method to increase surface hydrophilicity. Although current DBD methods yield a hydrophilic surface, adsorbed hydrocarbons rapidly restore hydrophobicity. We demonstrated that application of DBD to implants previously packaged in a vacuum, generates a hydrophilic surface that supports osteoblastic differentiation in vitro and this can be done immediately prior to use. In the present study, we tested the hypothesis that DBD treatment to alter surface wettability at the time of implant placement will improve osseointegration in vivo. MATERIALS AND METHODS Twenty male and sixteen female rabbits were used in a preclinical trans-axial femur model of osseointegration. Control and DBD treatment implants were inserted randomized per hind limb in each rabbit (1 implant/hind-limb). At 6 weeks post-surgery, bone-to-implant contact, adjacent bone volume, and torque to failure were assessed by micro-CT, calcified histology, and mechanical testing. RESULTS DBD plasma treatment of vacuum-sealed implants increased surface wettability and did not change surface chemistry or roughness. Peak torque and torsional energy, and bone-to-implant contact increased with DBD treatment in males. In contrast, female rabbits showed increased osseointegration equal to DBD treated male implants regardless of DBD plasma treatment. CONCLUSION DBD treatment is an effective method to enhance osseointegration by increasing surface wettability; however, this response is sex dependent. In healthy female patients, DBD treatment may not be necessary but in older patients or patients with compromised bone, this treatment could be an effective measure to ensure implant success.
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Affiliation(s)
- Michael B Berger
- Department of Biomedical Engineering, Virginia Commonwealth University, 601 W. Main Street, Richmond, VA 23284, USA
| | - D Joshua Cohen
- Department of Biomedical Engineering, Virginia Commonwealth University, 601 W. Main Street, Richmond, VA 23284, USA
| | - Michael M Levit
- Department of Biomedical Engineering, Virginia Commonwealth University, 601 W. Main Street, Richmond, VA 23284, USA
| | - Jennifer L Puetzer
- Department of Biomedical Engineering, Virginia Commonwealth University, 601 W. Main Street, Richmond, VA 23284, USA
| | - Barbara D Boyan
- Department of Biomedical Engineering, Virginia Commonwealth University, 601 W. Main Street, Richmond, VA 23284, USA; Wallace H. Coulter Department of Biomedical Engineering at the Georgia Institute of Technology and Emory University, 313 Ferst Drive, Atlanta, GA 30332, USA.
| | - Zvi Schwartz
- Department of Biomedical Engineering, Virginia Commonwealth University, 601 W. Main Street, Richmond, VA 23284, USA; Department of Periodontology, University of Texas Health Science Center at San Antonio, 7703 Floyd Curl Drive, San Antonio, TX 78229, USA
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9
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Wang Y, Gan Z, Lu H, Liu Z, Shang P, Zhang J, Yin W, Chu H, Yuan R, Ye Y, Chen P, Rong M. Impact of High-Altitude Hypoxia on Early Osseointegration With Bioactive Titanium. Front Physiol 2021; 12:689807. [PMID: 35035356 PMCID: PMC8753411 DOI: 10.3389/fphys.2021.689807] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 10/22/2021] [Indexed: 01/03/2023] Open
Abstract
Nowadays, the bone osseointegration in different environments is comparable, but the mechanism is unclear. This study aimed to investigate the osseointegration of different bioactive titanium surfaces under normoxic or high-altitude hypoxic environments. Titanium implants were subjected to one of two surface treatments: (1) sanding, blasting, and acid etching to obtain a rough surface, or (2) extensive polishing to obtain a smooth surface. Changes in the morphology, proliferation, and protein expression of osteoblasts on the rough and smooth surfaces were examined, and bone formation was studied through western blotting and animal-based experiments. Our findings found that a hypoxic environment and rough titanium implant surface promoted the osteogenic differentiation of osteoblasts and activated the JAK1/STAT1/HIF-1α pathway in vitro. The animal study revealed that following implant insertion in tibia of rabbit, bone repair at high altitudes was slower than that at low altitudes (i.e., in plains) after 2weeks; however, bone formation did not differ significantly after 4weeks. The results of our study showed that: (1) The altitude hypoxia environment would affect the early osseointegration of titanium implants while titanium implants with rough surfaces can mitigate the effects of this hypoxic environment on osseointegration, (2) the mechanism may be related to the activation of JAK1/STAT1/HIF-1α pathway, and (3) our results suggest the osteogenesis of titanium implants, such as oral implants, is closely related to the oxygen environment. Clinical doctors, especially dentists, should pay attention to the influence of hypoxia on early osseointegration in patients with high altitude. For example, it is better to choose an implant system with rough implant surface in the oral cavity of patients with tooth loss at high altitude.
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Affiliation(s)
- Yarong Wang
- Department of Periodontology and Implantology, Stomatological Hospital, Southern Medical University, Guangzhou, China
| | - Zekun Gan
- Department of Periodontology and Implantology, Stomatological Hospital, Southern Medical University, Guangzhou, China
| | - Haibin Lu
- Department of Implantology, Stomatological Hospital, Southern Medical University, Guangzhou, China
| | - Ziyi Liu
- Department of Periodontology and Implantology, Stomatological Hospital, Southern Medical University, Guangzhou, China
| | - Peng Shang
- College of Animal Science, Tibet Agriculture and Animal Husbandry University, Linzhi, China
| | - Jian Zhang
- College of Animal Science, Tibet Agriculture and Animal Husbandry University, Linzhi, China
| | - Wuwei Yin
- Department of Periodontology and Implantology, Stomatological Hospital, Southern Medical University, Guangzhou, China
| | - Hongxing Chu
- Department of Periodontology and Implantology, Stomatological Hospital, Southern Medical University, Guangzhou, China
| | | | - Yingxin Ye
- Department of Periodontology and Implantology, Stomatological Hospital, Southern Medical University, Guangzhou, China
| | - Pei Chen
- Department of Periodontology and Implantology, Stomatological Hospital, Southern Medical University, Guangzhou, China
- Pei Chen,
| | - Mingdeng Rong
- Department of Periodontology and Implantology, Stomatological Hospital, Southern Medical University, Guangzhou, China
- *Correspondence: Mingdeng Rong,
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Blanc-Sylvestre N, Bouchard P, Chaussain C, Bardet C. Pre-Clinical Models in Implant Dentistry: Past, Present, Future. Biomedicines 2021; 9:1538. [PMID: 34829765 PMCID: PMC8615291 DOI: 10.3390/biomedicines9111538] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 10/11/2021] [Accepted: 10/15/2021] [Indexed: 12/23/2022] Open
Abstract
Biomedical research seeks to generate experimental results for translation to clinical settings. In order to improve the transition from bench to bedside, researchers must draw justifiable conclusions based on data from an appropriate model. Animal testing, as a prerequisite to human clinical exposure, is performed in a range of species, from laboratory mice to larger animals (such as dogs or non-human primates). Minipigs appear to be the animal of choice for studying bone surgery around intraoral dental implants. Dog models, well-known in the field of dental implant research, tend now to be used for studies conducted under compromised oral conditions (biofilm). Regarding small animal models, research studies mostly use rodents, with interest in rabbit models declining. Mouse models remain a reference for genetic studies. On the other hand, over the last decade, scientific advances and government guidelines have led to the replacement, reduction, and refinement of the use of all animal models in dental implant research. In new development strategies, some in vivo experiments are being progressively replaced by in vitro or biomaterial approaches. In this review, we summarize the key information on the animal models currently available for dental implant research and highlight (i) the pros and cons of each type, (ii) new levels of decisional procedures regarding study objectives, and (iii) the outlook for animal research, discussing possible non-animal options.
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Affiliation(s)
- Nicolas Blanc-Sylvestre
- Université de Paris, Institut des Maladies Musculo-Squelettiques, Orofacial Pathologies, Imaging and Biotherapies Laboratory URP2496 and FHU-DDS-Net, Dental School, and Plateforme d’Imagerie du Vivant (PIV), 92120 Montrouge, France; (N.B.-S.); (P.B.); (C.C.)
- AP-HP, Department of Periodontology, Rothschild Hospital, European Postgraduate in Periodontology and Implantology, Université de Paris, 75012 Paris, France
| | - Philippe Bouchard
- Université de Paris, Institut des Maladies Musculo-Squelettiques, Orofacial Pathologies, Imaging and Biotherapies Laboratory URP2496 and FHU-DDS-Net, Dental School, and Plateforme d’Imagerie du Vivant (PIV), 92120 Montrouge, France; (N.B.-S.); (P.B.); (C.C.)
- AP-HP, Department of Periodontology, Rothschild Hospital, European Postgraduate in Periodontology and Implantology, Université de Paris, 75012 Paris, France
| | - Catherine Chaussain
- Université de Paris, Institut des Maladies Musculo-Squelettiques, Orofacial Pathologies, Imaging and Biotherapies Laboratory URP2496 and FHU-DDS-Net, Dental School, and Plateforme d’Imagerie du Vivant (PIV), 92120 Montrouge, France; (N.B.-S.); (P.B.); (C.C.)
- AP-HP, Reference Center for Rare Disorders of the Calcium and Phosphate Metabolism, Dental Medicine Department, Bretonneau Hospital, GHN-Université de Paris, 75018 Paris, France
| | - Claire Bardet
- Université de Paris, Institut des Maladies Musculo-Squelettiques, Orofacial Pathologies, Imaging and Biotherapies Laboratory URP2496 and FHU-DDS-Net, Dental School, and Plateforme d’Imagerie du Vivant (PIV), 92120 Montrouge, France; (N.B.-S.); (P.B.); (C.C.)
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