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Xu Z, Gong X, Hu Z, Bian R, Jin Y, Li Y. Effect of novel polyethylene insert configurations on bone-implant micromotion and contact stresses in total ankle replacement prostheses: a finite element analysis. Front Bioeng Biotechnol 2024; 12:1371851. [PMID: 38699432 PMCID: PMC11063281 DOI: 10.3389/fbioe.2024.1371851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Accepted: 04/01/2024] [Indexed: 05/05/2024] Open
Abstract
Purpose This study investigates the impact of elastic improvements to the artificial ankle joint insert on prosthesis biomechanics to reduce the risk of prosthesis loosening in TAR patients. Methods CT data of the right ankle was collected from one elderly female volunteer. An original TAR model (Model A) was developed from CT images and the INBONE II implant system. The development of the new inserts adopts an elastic improvement design approach, where different geometric configurations of flexible layers are inserted into the traditional insert. The structure can be divided into continuous flexible layers and intermittent flexible layers. The flexible layers aim to improve the elasticity of the component by absorbing and dispersing more kinetic energy. The newly designed inserts are used to replace the original insert in Model A, resulting in the development of Models B-D. A finite element model of gait analysis was based by gait parameters. Discrepancies in micromotion and contact behaviour were analysed during the gait cycle, along with interface fretting and articular surface stress at 50% of the gait cycle. Results In terms of micromotion, the improved elastic models showed reduced micromotion at the tibial-implant interfaces compared to the original model. The peak average micromotion decreased by 12.1%, 13.1%, and 14.5% in Models B, C, and D, respectively. The micromotion distribution also improved in the improved models, especially in Model D. Regarding contact areas, all models showed increased contact areas of articular surfaces with axial load, with Models B, C, and D increasing by 26.8%, 23.9%, and 24.4%, respectively. Contact stress on articular surfaces increased with axial load, reaching peak stress during the late stance phase. Models with continuous flexible layer designs exhibited lower stress levels. The insert and the talar prosthetic articular surfaces showed more uniform stress distribution in the improved models. Conclusion Improving the elasticity of the insert can enhance component flexibility, absorb impact forces, reduce micromotion, and improve contact behavior. The design scheme of continuous flexible layers is more advantageous in transmitting and dispersing stress, providing reference value for insert improvement.
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Affiliation(s)
- Zhi Xu
- Department of Orthopedic, Zhangjiagang Fifth People’s Hospital, Zhangjiagang, Jiangsu, China
| | - Xiaonan Gong
- Department of Orthopedic, Dongying People’s Hospital, Dongying, Shandong, China
| | - Zhengyuan Hu
- Department of Orthopedic, Jingxian Hospital, Jingxian, Anhui, China
| | - Ruixiang Bian
- Department of Orthopedic, Dongying People’s Hospital, Dongying, Shandong, China
| | - Ying Jin
- Department of Orthopedic, The Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou, China
| | - Yuwan Li
- Department of Orthopedic, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
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Zgouridou A, Kenanidis E, Potoupnis M, Tsiridis E. Global mapping of institutional and hospital-based (Level II-IV) arthroplasty registries: a scoping review. EUROPEAN JOURNAL OF ORTHOPAEDIC SURGERY & TRAUMATOLOGY : ORTHOPEDIE TRAUMATOLOGIE 2024; 34:1219-1251. [PMID: 37768398 PMCID: PMC10858160 DOI: 10.1007/s00590-023-03691-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Accepted: 08/13/2023] [Indexed: 09/29/2023]
Abstract
PURPOSE Four joint arthroplasty registries (JARs) levels exist based on the recorded data type. Level I JARs are national registries that record primary data. Hospital or institutional JARs (Level II-IV) document further data (patient-reported outcomes, demographic, radiographic). A worldwide list of Level II-IV JARs must be created to effectively assess and categorize these data. METHODS Our study is a systematic scoping review that followed the PRISMA guidelines and included 648 studies. Based on their publications, the study aimed to map the existing Level II-IV JARs worldwide. The secondary aim was to record their lifetime, publications' number and frequency and recognise differences with national JARs. RESULTS One hundred five Level II-IV JARs were identified. Forty-eight hospital-based, 45 institutional, and 12 regional JARs. Fifty JARs were found in America, 39 in Europe, nine in Asia, six in Oceania and one in Africa. They have published 485 cohorts, 91 case-series, 49 case-control, nine cross-sectional studies, eight registry protocols and six randomized trials. Most cohort studies were retrospective. Twenty-three per cent of papers studied patient-reported outcomes, 21.45% surgical complications, 13.73% postoperative clinical and 5.25% radiographic outcomes, and 11.88% were survival analyses. Forty-four JARs have published only one paper. Level I JARs primarily publish implant revision risk annual reports, while Level IV JARs collect comprehensive data to conduct retrospective cohort studies. CONCLUSIONS This is the first study mapping all Level II-IV JARs worldwide. Most JARs are found in Europe and America, reporting on retrospective cohorts, but only a few report on studies systematically.
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Affiliation(s)
- Aikaterini Zgouridou
- Academic Orthopaedic Department, Aristotle University Medical School, General Hospital Papageorgiou, Ring Road Efkarpia, 56403, Thessaloniki, Greece
- Centre of Orthopaedic and Regenerative Medicine (CORE), Center for Interdisciplinary Research and Innovation (CIRI)-Aristotle University of Thessaloniki (AUTH), Balkan Center, Buildings A & B, 10th km Thessaloniki-Thermi Rd, P.O. Box 8318, 57001, Thessaloniki, Greece
| | - Eustathios Kenanidis
- Academic Orthopaedic Department, Aristotle University Medical School, General Hospital Papageorgiou, Ring Road Efkarpia, 56403, Thessaloniki, Greece.
- Centre of Orthopaedic and Regenerative Medicine (CORE), Center for Interdisciplinary Research and Innovation (CIRI)-Aristotle University of Thessaloniki (AUTH), Balkan Center, Buildings A & B, 10th km Thessaloniki-Thermi Rd, P.O. Box 8318, 57001, Thessaloniki, Greece.
| | - Michael Potoupnis
- Academic Orthopaedic Department, Aristotle University Medical School, General Hospital Papageorgiou, Ring Road Efkarpia, 56403, Thessaloniki, Greece
- Centre of Orthopaedic and Regenerative Medicine (CORE), Center for Interdisciplinary Research and Innovation (CIRI)-Aristotle University of Thessaloniki (AUTH), Balkan Center, Buildings A & B, 10th km Thessaloniki-Thermi Rd, P.O. Box 8318, 57001, Thessaloniki, Greece
| | - Eleftherios Tsiridis
- Academic Orthopaedic Department, Aristotle University Medical School, General Hospital Papageorgiou, Ring Road Efkarpia, 56403, Thessaloniki, Greece
- Centre of Orthopaedic and Regenerative Medicine (CORE), Center for Interdisciplinary Research and Innovation (CIRI)-Aristotle University of Thessaloniki (AUTH), Balkan Center, Buildings A & B, 10th km Thessaloniki-Thermi Rd, P.O. Box 8318, 57001, Thessaloniki, Greece
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Chen PA, Chen ACY, Cheng CY. Failure of the linkage mechanism in a semi-constrained total elbow arthroplasty is a rare and unpredictable event: a review of seven cases. INTERNATIONAL ORTHOPAEDICS 2024; 48:537-545. [PMID: 37897544 DOI: 10.1007/s00264-023-06015-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 10/16/2023] [Indexed: 10/30/2023]
Abstract
PURPOSE Linked component of total elbow arthroplasty (TEA) consisted of bushing and locking pins. Failure of linked components is a rare complication of TEA. This study aims to investigate the mechanism and consequence of failure of the linkage mechanism in TEA surgeries. METHODS Between 2010 and 2021, five patients received revision operation due to linked component failure. Besides, two patients underwent primary operation at another institute were also analyzed due to failure of the linkage mechanism. RESULTS All seven patients underwent primary TEA and mean age for primary TEA was 48 (range, 27-62). Two patients had TEA for post-traumatic arthritis, three patients for rheumatoid arthritis, and two patients for comminuted distal humerus fracture. The average time between primary TEA and revision TEA for linked component failure was 13.6 years. Three bushing wear and four locking pin dissociation were diagnosed according to pre-operative radiography. Elbow pain and swelling are the most common clinical symptoms. Severe osteolysis, periprosthetic fracture, and stem loosening were noted in three bushing wear cases. In four dissociation of locking pin cases, breakage of male locking pin phalanges was demonstrated in two patients. For revision procedures, both the locking pins and bushings were replaced. No patients in the study required additional surgery after the revision operation for linked component failure. CONCLUSION Osteolysis, component loosening, periprosthetic fracture may be expected after linked component failure. Patients should be regularly followed up from short-term to long-term with radiography. Early diagnosis and intervention with linked component exchange can prevent extensive revision surgery.
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Affiliation(s)
- Po-An Chen
- Department of Orthopedic Surgery and Comprehensive Sports Medicine Center, Chang Gung Memorial Hospital-Linkou, Taoyuan, Taiwan
| | - Alvin Chao-Yu Chen
- Department of Orthopedic Surgery and Comprehensive Sports Medicine Center, Chang Gung Memorial Hospital-Linkou, Taoyuan, Taiwan
| | - Chun-Ying Cheng
- Department of Orthopedic Surgery and Comprehensive Sports Medicine Center, Chang Gung Memorial Hospital-Linkou, Taoyuan, Taiwan.
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Gibbs CM, Nelson B, Combs T, Moody D, Kaufmann RA. Posterior Flange Cyclic Loading in a Novel Total Elbow Arthroplasty. JOURNAL OF HAND SURGERY GLOBAL ONLINE 2023. [DOI: 10.1016/j.jhsg.2022.12.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023] Open
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Yu J, Zhao D, Chen WM, Chu P, Wang S, Zhang C, Huang J, Wang X, Ma X. Finite element stress analysis of the bearing component and bone resected surfaces for total ankle replacement with different implant material combinations. BMC Musculoskelet Disord 2022; 23:70. [PMID: 35045842 PMCID: PMC8772082 DOI: 10.1186/s12891-021-04982-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 12/21/2021] [Indexed: 11/17/2022] Open
Abstract
Background A proper combination of implant materials for Total Ankle Replacement (TAR) may reduce stress at the bearing component and the resected surfaces of the tibia and talus, thus avoiding implant failure of the bearing component or aseptic loosening at the bone-implant interface. Methods A comprehensive finite element foot model implanted with the INBONE II implant system was created and the loading at the second peak of ground reaction force was simulated. Twelve material combinations including four materials for tibial and talar components (Ceramic, CoCrMo, Ti6Al4V, CFR-PEEK) and three materials for bearing components (CFR-PEEK, PEEK, and UHMWPE) were analyzed. Von Mises stress at the top and articular surfaces of the bearing component and the resected surfaces of the tibia and talus were recorded. Results The stress at both the top and articular surfaces of the bearing component could be greatly reduced with more compliant bearing materials (44.76 to 72.77% difference of peak stress value), and to a lesser extent with more compliant materials for the tibial and talar components (0.94 to 28.09% difference of peak stress value). Peak stresses at both the tibial and talar bone-implant interface could be reduced more strongly by using tibial and talar component materials with smaller material stiffness (7.31 to 66.95% difference of peak stress value) compared with bearing materials with smaller material stiffness (1.11 to 24.77% difference of peak stress value). Conclusions Implant components with smaller material stiffness provided a stress reduction at the bearing component and resected surfaces of the tibia and talus. The selection of CFR-PEEK as the material of tibial and talar components and UHMWPE as the material of the bearing component seemed to be a promising material combination for TAR implants. Wear testing and long-term failure analysis of TAR implants with these materials should be included in future studies. Supplementary Information The online version contains supplementary material available at 10.1186/s12891-021-04982-3.
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Borton ZM, Prasad G, Konstantopoulos G, Morgan ML, Cresswell T, Espag MP, Tambe AA, Clark DI. Mid- to long-term survivorship of the cemented, semiconstrained Discovery total elbow arthroplasty. J Shoulder Elbow Surg 2021; 30:1662-1669. [PMID: 33486063 DOI: 10.1016/j.jse.2020.12.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 11/27/2020] [Accepted: 12/05/2020] [Indexed: 02/01/2023]
Abstract
BACKGROUND The incidence of total elbow arthroplasty (TEA) is increasing, and an improved understanding of elbow kinematics and biomaterials has driven advances in implant design. In modern practice, cemented, semiconstrained devices are most frequently used. The Discovery TEA has demonstrated promising early results, although there are a paucity of follow-up studies and no dedicated mid- to long-term series. We therefore present the longest, most complete such study to date. METHODS A prospectively maintained local joint registry was interrogated to yield a consecutive series of Discovery TEAs performed at a single non-design center. The minimum follow-up period was set at 5 years. Revision procedures and TEAs performed for acute trauma were excluded. The primary outcome was survivorship of the implant. The secondary outcomes included clinical, radiographic, and patient-reported outcomes. RESULTS We identified 67 TEAs in 58 patients for inclusion at a mean of 98.5 ± 20.4 months from surgery. Four cases (6%) were lost to follow-up, and implant survival was censored accordingly. The implant was revised in 14 cases (20.9%). The Kaplan-Meier method showed an implant survivorship rate of 76.8% at 119 months. A significant difference in survival was found between dominant and nondominant elbows (P = .012, Breslow test), with elbow dominance conferring a 4.5-fold increased risk of revision (relative risk, 4.5; 95% confidence interval, 1.1-18.5). Pooled clinical outcomes (70.9% follow-up at minimum of 60 months and median of 77.8 months) were also determined. CONCLUSIONS We present the longest-term and most complete single-center follow-up study of the Discovery TEA to date. Further long-term survival studies are required to elucidate the performance of this implant compared with more established designs. We have also demonstrated differences in implant survivorship owing to hand dominance for the first time.
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Haverstock JP, King GJW, Athwal GS, Johnson JA, Langohr GDG. Elbow motion patterns during daily activity. J Shoulder Elbow Surg 2020; 29:2007-2014. [PMID: 32631503 DOI: 10.1016/j.jse.2020.03.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/24/2019] [Revised: 03/11/2020] [Accepted: 03/20/2020] [Indexed: 02/01/2023]
Abstract
BACKGROUND This in vivo kinematic study was developed to ascertain (1) elbow posture and motion during daily activities and (2) to compare motions of the dominant and nondominant elbows. METHODS Forty-six subjects wore a custom instrumented shirt to continuously measure elbow posture and motion for the waking hours of 1 day. The 3D orientations of each of the forearm and humerus sensors enabled calculation of elbow flexion-extension and pronation-supination angles. RESULTS The elbow flexion-extension postures that were most common ranged from 60°-100° for both the dominant and nondominant extremities averaging 44% ± 4% and 35% ± 4% of the day, respectively. When elbow flexion motions were calculated, there were a large number of motions over a wide distribution of flexion angles, with the dominant side exhibiting significantly more motions per hour than the nondominant side. CONCLUSION Both flexion-extension and pronation-supination motions occur more commonly in the dominant arm, and the dominant arm is more commonly in pronation. These data provide a baseline for assessing treatment outcomes, ergonomic studies, and elbow arthroplasty wear testing.
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Affiliation(s)
- John P Haverstock
- Investigation performed at the Roth
- McFarlane Hand and Upper Limb Center, London, ON, Canada; Oakville Trafalgar Memorial Hospital, Oakville, ON, Canada
| | - Graham J W King
- Investigation performed at the Roth
- McFarlane Hand and Upper Limb Center, London, ON, Canada
| | - George S Athwal
- Investigation performed at the Roth
- McFarlane Hand and Upper Limb Center, London, ON, Canada
| | - James A Johnson
- Investigation performed at the Roth
- McFarlane Hand and Upper Limb Center, London, ON, Canada
| | - G Daniel G Langohr
- Investigation performed at the Roth
- McFarlane Hand and Upper Limb Center, London, ON, Canada.
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Kwak JM, Koh KH, Jeon IH. Total Elbow Arthroplasty: Clinical Outcomes, Complications, and Revision Surgery. Clin Orthop Surg 2019; 11:369-379. [PMID: 31788158 PMCID: PMC6867907 DOI: 10.4055/cios.2019.11.4.369] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Accepted: 07/22/2019] [Indexed: 01/25/2023] Open
Abstract
Total elbow arthroplasty is a common surgical procedure used in the management of advanced rheumatoid arthritis, posttraumatic arthritis, osteoarthritis, and unfixable fracture in elderly patients. Total elbow prostheses have evolved over the years and now include the linked, unlinked, and convertible types. However, long-term complications, including infection, aseptic loosening, instability, and periprosthetic fracture, remain a challenge. Here, we introduce each type of implant and evaluate clinical outcomes and complications by reviewing the previous literature.
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Affiliation(s)
- Jae-Man Kwak
- Department of Orthopedics, Biomechanics Laboratory, Mayo Clinic, Rochester, MN, USA
| | - Kyoung-Hwan Koh
- Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - In-Ho Jeon
- Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
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Physiological Loading of the Coonrad/Morrey, Nexel, and Discovery Elbow Systems: Evaluation by Finite Element Analysis. J Hand Surg Am 2019; 44:61.e1-61.e9. [PMID: 29908927 DOI: 10.1016/j.jhsa.2018.04.022] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Revised: 03/15/2018] [Accepted: 04/18/2018] [Indexed: 02/02/2023]
Abstract
PURPOSE Wear of polyethylene bearings represents a limiting factor in the long-term success of total elbow prostheses. Bearing stress is 1 factor contributing to accelerated wear. Physiological loading of total elbow prostheses and implant design influence upon bearing stresses have not been well described. This study evaluates bearing stresses in 3 commercially available implant designs under loads associated with daily living. METHODS Motion tracking from a healthy volunteer helped establish a musculoskeletal model to simulate flexor and extensor muscle activation at 0°, 45°, and 90° of shoulder abduction with a 2.3-kg weight in hand-forces and moments were measured at the elbow. Resulting physiological joint reaction forces and moments were applied to finite element models of 3 total elbow bearing designs (Coonrad/Morrey, Nexel, and Discovery) to evaluate contact area and polyethylene stresses. RESULTS Increasing shoulder abduction resulted in minimal changes to the elbow joint reaction force but greater joint moments. All implants showed greater peak stresses with increasing shoulder abduction-elbow varus. Discovery and Nexel achieved greater contact area (23% vs > 100%) and demonstrated up to 39% lower peak polyethylene stresses compared with the Coonrad/Morrey design. CONCLUSIONS Shoulder abduction results in a varus moment at the elbow. Newer bearing designs (Nexel and Discovery) provide a combination of higher contact area, improved load sharing, reduced edge loading, and lower stresses through elbow range of motion when compared with a cylindrical hinge-bearing design (Coonrad/Morrey). CLINICAL RELEVANCE Although the Coonrad/Morrey is a clinically successful prosthesis, our physiological loading model shows that Discovery and Nexel provide greater contact area, better load sharing and lower peak stresses. This may lead to a decrease in polyethylene wear rates and the eventual risks of osteolysis and aseptic loosening. Further studies are needed to determine how these findings translate clinically.
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Singh D, Rana A, Jhajhria SK, Garg B, Pandey PM, Kalyanasundaram D. Experimental assessment of biomechanical properties in human male elbow bone subjected to bending and compression loads. J Appl Biomater Funct Mater 2018; 17:2280800018793816. [DOI: 10.1177/2280800018793816] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
- Dilpreet Singh
- Centre for Biomedical Engineering, Indian Institute of Technology (IIT) Delhi, New Delhi, India
| | - Abhishek Rana
- Centre for Biomedical Engineering, Indian Institute of Technology (IIT) Delhi, New Delhi, India
| | - Saroj Kaler Jhajhria
- Department of Anatomy, All India Institute of Medical Sciences (AIIMS), New Delhi, India
| | - Bhavuk Garg
- Department of Orthopaedics, AIIMS, New Delhi, India
| | | | - Dinesh Kalyanasundaram
- Centre for Biomedical Engineering, Indian Institute of Technology (IIT) Delhi, New Delhi, India
- Department of Biomedical Engineering, AIIMS, New Delhi, India
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Willing R. Design optimisation improves the performance of custom distal humeral hemiarthroplasty implants. COMPUTER METHODS IN BIOMECHANICS AND BIOMEDICAL ENGINEERING-IMAGING AND VISUALIZATION 2018. [DOI: 10.1080/21681163.2018.1446054] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Ryan Willing
- Department of Mechanical Engineering, Thomas J. Watson School of Engineering and Applied Science, State University of New York, Binghamton, NY, USA
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Miao Q, Ding H, Huang M, Shen J, Tu Q, Huang M. [Preliminary application of three dimensional printing personalized navigation template in assisting total elbow replacement for patients with elbow tumor]. ZHONGGUO XIU FU CHONG JIAN WAI KE ZA ZHI = ZHONGGUO XIUFU CHONGJIAN WAIKE ZAZHI = CHINESE JOURNAL OF REPARATIVE AND RECONSTRUCTIVE SURGERY 2017; 31:385-391. [PMID: 29798600 PMCID: PMC8498180 DOI: 10.7507/1002-1892.201611091] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Revised: 03/14/2017] [Indexed: 11/03/2022]
Abstract
Objective To explore the clinical methods of resection of elbow tumor and total elbow replacement with custom personalized prosthesis based on three dimensional (3-D) printing navigation template. Methods In August 2016, a 63-year-old male patient with left elbow joint tumor was treated, with the discovery of the left distal humerus huge mass over 3 months, with elbow pain, activity limitation of admission. Computer-assisted reduction technique combined with 3-D printing was used to simulate preoperative tumor resection, a customized personal prosthesis was developed; tumor was accurately excised during operation, and the clinical result was evaluated after operation. Results The time was 46 minutes for tumor resection, and was 95 minutes for personalized implant and allograft bone without fluoroscopy. X-ray and CT examination at 1 week after operation showed good position of artificial elbow joint; the anteversion of ulna prosthesis was 30° and the elbow carrying angle was 15°, which were consistent with the simulated results before surgery. The finger flexion was normal at 1 month after operation; the range of motion was 0-130° for elbow flexion and extension, 80° for forearm pronation, and 80° for forearm supination. The elbow function was able to meet the needs of daily life at 7 months after operation, and no recurrence and metastasis of tumor were observed. Conclusion For limb salvage of elbow joint, computer aided design can make preoperative surgical simulation; the navigation template can improve surgical precision; and the function of elbow joint can be reconstructed with customized and personlized prosthesis for total elbow replacement.
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Affiliation(s)
- Qiuju Miao
- Department of Bone and Joint Disease, Guangzhou General Hospital of Guangzhou Military, Guangzhou Guangdong, 510010, P.R.China;Graduate College, Traditional Chinese Medicine University of Guangzhou, Guangzhou Guangdong, 510010, P.R.China
| | - Huanwen Ding
- Department of Bone and Joint Disease, Guangzhou General Hospital of Guangzhou Military, Guangzhou Guangdong, 510010,
| | - Minqiang Huang
- Department of Bone and Joint Disease, Guangzhou General Hospital of Guangzhou Military, Guangzhou Guangdong, 510010, P.R.China;Graduate College, Traditional Chinese Medicine University of Guangzhou, Guangzhou Guangdong, 510010, P.R.China
| | - Jianjian Shen
- Department of Bone and Joint Disease, Guangzhou General Hospital of Guangzhou Military, Guangzhou Guangdong, 510010, P.R.China
| | - Qiang Tu
- Department of Bone and Joint Disease, Guangzhou General Hospital of Guangzhou Military, Guangzhou Guangdong, 510010, P.R.China
| | - Miaojun Huang
- Guangdong University of Technology, Guangzhou Guangdong, 510006, P.R.China
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