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Dabirrahmani D, Farshidfar S, Cadman J, Shahidian H, Kark L, Sullivan J, Appleyard R. Biomechanical improvements in gait following medial pivot knee implant surgery. Clin Biomech (Bristol, Avon) 2024; 116:106267. [PMID: 38838419 DOI: 10.1016/j.clinbiomech.2024.106267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2023] [Revised: 03/11/2024] [Accepted: 05/17/2024] [Indexed: 06/07/2024]
Abstract
BACKGROUND Total knee replacements are used to improve function and reduce pain in patients with advanced osteoarthritis. The medially stabilising implant is designed to mimic a healthy knee. This study aims to provide a comprehensive analysis of the kinematics and kinetics of a medially stabilising knee implant, comparing it to a healthy control group, as well as to its pre-operative state and the contralateral limb. METHODS Sixteen total knee replacement patients and ten healthy participants were recruited. Patients underwent testing 4-6 weeks before surgery and repeated the same tests 12 months after surgery. Healthy participants completed the same tests at a single time point. All participants completed three walking trials: kinematics was captured with eight cameras; kinetics with in-ground force plates. Subject-specific musculoskeletal models were developed in OpenSim. Inverse kinematics and inverse dynamics were used to determine gait parameters. Joint angles and joint moments were evaluated using Statistical Parametric Mapping. Patient-reported outcome measures were also collected at both time points. FINDINGS Spatiotemporal results indicate significant differences in velocity and step length between pre-operative patients and control participants. Differences are observed in the adduction angles between the contralateral and ipsilateral limbs pre-operatively. Postoperatively, there was an increase in the 1st peak flexion moment, reduced adduction moment and reduced internal rotation moment. In PROMs, patients all report improvements in pain levels and high satisfaction levels following surgery. INTERPRETATIONS Following medial stabilising total knee arthroplasty, patients displayed improved clinical parameters and joint moments reflecting a shift towards more normal, healthy gait.
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Affiliation(s)
- D Dabirrahmani
- Macquarie Medical School, Faculty of Medicine, Health and Human Sciences, Macquarie University, Australia.
| | - S Farshidfar
- Macquarie Medical School, Faculty of Medicine, Health and Human Sciences, Macquarie University, Australia
| | - J Cadman
- Macquarie Medical School, Faculty of Medicine, Health and Human Sciences, Macquarie University, Australia
| | - H Shahidian
- Macquarie Medical School, Faculty of Medicine, Health and Human Sciences, Macquarie University, Australia
| | - L Kark
- Graduate School of Biomedical Engineering, University of New South Wales, Australia
| | - J Sullivan
- Department of Orthopaedics, Macquarie University Hospital, Australia
| | - R Appleyard
- Macquarie Medical School, Faculty of Medicine, Health and Human Sciences, Macquarie University, Australia
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Medial Pivot Versus Posterior-Stabilized Prosthesis Design in Primary Total Knee Arthroplasty: A Systematic Review and Meta-Analysis. Indian J Orthop 2022; 56:1506-1524. [PMID: 36052392 PMCID: PMC9385931 DOI: 10.1007/s43465-022-00678-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Accepted: 05/30/2022] [Indexed: 02/04/2023]
Abstract
BACKGROUND Studies of clinical outcomes that compare the Medial Pivot design (MP) with the Posterior-Stabilized design (PS) were controversial. The meta-analysis was performed to summarize existing evidence, aiming to determine whether MP was superior to PS prosthesis. METHODS Search strategies followed the recommendations of the Cochrane collaboration. Electronic searches such as PubMed, Embase, Web of Science, and Cochrane were systematically searched for publications concerning medical pivot and posterior stabilized prosthesis from the inception date to April 2021. Authors also manually checked and retrieved a reference list of included publications for potential studies, which the electronic searches had not found. Two investigators independently searched, screened, and reviewed the full text of the article. Disagreements generated throughout the process were resolved by consensus, and if divergences remain, they were arbitrated by a third author. Subsequently, patients were divided into the MP and PS groups. RESULTS This study included 18 articles, comprising a total of 2614 patients with a similar baseline. The results showed the PS group had a higher risk of the patellar clunk or crepitus. However, the theoretical advantages of MP prosthesis could not translate to the difference in knee function, clinical complications, revision rate and satisfaction. Similarly, the shape and mechanism of prostheses could not affect the implant position and postoperative alignment. CONCLUSIONS The MP prosthesis can reduce the patellar clunk or crepitus rate. However, choices between the MP and PS prosthesis would not affect knee function, clinical complications, revision rate, patient satisfaction, implant position, and postoperative alignment.
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Liu X, Liu Y, Li B, Wang L, Wang Y, Liu J. Comparison of the clinical and patient-reported outcomes between medial stabilized and posterior stabilized total knee arthroplasty: A systematic review and meta-analysis. Knee 2022; 36:9-19. [PMID: 35405624 DOI: 10.1016/j.knee.2022.03.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2021] [Revised: 12/28/2021] [Accepted: 03/21/2022] [Indexed: 02/02/2023]
Abstract
BACKGROUND Total knee arthroplasty (TKA) is effective in relieving pain and improving function in patients with end-stage knee osteoarthritis. Both medial stabilized total knee arthroplasty (MS-TKA) and posterior stabilized total knee arthroplasty (PS-TKA) can achieve satisfactory clinical results, but comparisons between MS-TKA and PS-TKA have yielded contradictory conclusions. This systematic review and meta-analysis were performed to investigate the differences in clinical and patient-reported outcomes (PROMs) between MS-TKA and PS-TKA. METHODS In December 2020, systematic searches of the following databases were undertaken: Pubmed, Embase, Cochrane Library, Clinical Trials.gov. Studies with PROMs comparing MS-TKA to PS-TKA were included. Meta-analysis was conducted for range of motion (ROM), Knee Society Score (KSS), Knee Society Functional Score (KFS), Forgotten Joint Score (FJS), Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), and Oxford Knee Score (OKS). RESULTS There were 17 studies included in this review, 13 studies used for quantitative analysis, and 4 studies used for qualitative synthesis. Meta-analysis concluded that the WOMAC mean difference (MD) for MS-TKA was 1.55 higher than for PS-TKA (MD = -1.55; 95 %CI = -2.45 to -0.64, P = 0.0008); however, this difference was less than the minimum clinically important difference (MCID) value of 15. Assessment using the OKS determined that the MD for PS-TKA was 0.58 higher than for MS-TKA (MD = 0.58; 95 %CI = 0.25 to 0.91, P = 0.0006); again, this MD was less than the MCID value of 5. There were no significant differences between MS-TKA and PS-TKA when assessed by ROM (P = 0.23), KSS (P = 0.13), KFS (P = 0.61), or FJS (P = 0.22). CONCLUSION Derived from numerous sources, utilizing a multitude of validated functional and patient-reported outcome assessment tools, there was no clinically evident advantage of MS-TKA compared to PS-TKA. REGISTRATION The registration number on PROSPERO is CRD42021228555.
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Affiliation(s)
- Xiaolong Liu
- Tianjin Medical University, No. 22 Qixiangtai Rd, Heping District, Tianjin 300041 China.
| | - Yang Liu
- Tianjin Medical University, No. 22 Qixiangtai Rd, Heping District, Tianjin 300041 China.
| | - Bing Li
- Tianjin Hospital, No. 406 Jiefang South Rd, Hexi District, Tianjin 300211, China.
| | - Lei Wang
- Tianjin Hospital, No. 406 Jiefang South Rd, Hexi District, Tianjin 300211, China.
| | - Yuanlin Wang
- Tianjin Medical University, No. 22 Qixiangtai Rd, Heping District, Tianjin 300041 China.
| | - Jun Liu
- Tianjin Hospital, No. 406 Jiefang South Rd, Hexi District, Tianjin 300211, China.
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Alessio-Mazzola M, Clemente A, Russo A, Mertens P, Burastero G, Formica M, Felli L. Clinical radiographic outcomes and survivorship of medial pivot design total knee arthroplasty: a systematic review of the literature. Arch Orthop Trauma Surg 2022; 142:3437-3448. [PMID: 34633511 PMCID: PMC9522696 DOI: 10.1007/s00402-021-04210-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Accepted: 09/29/2021] [Indexed: 01/09/2023]
Abstract
BACKGROUND Total knee arthroplasty is a reliable procedure able to reduce pain and disability in patients suffering from osteoarthritis. However, a considerable percentage of patients still experiences unsatisfactory results. Medial pivot total knee arthroplasty has been introduced in the clinical practice to overcome problems related with classic design implants and better mimic native knee kinematics. The aim of this study was to analyze survivorship and clinical and radiographic outcomes of medial pivot implants. METHODS A systematic research was conducted in eight different databases. Thirty-four studies met the inclusion criteria and were included in the analysis. Data on objective and patients-reported outcomes, radiographic alignment, and survivorship were collected and analyzed. Revision rate was expressed as revision per 100 components years. RESULT A total of 3377 procedures were included. Mean follow-up was 85.7 months (range, 12-182). The revision per 100 components years was 0.19, which corresponds to a revision rate of 1.9% after 10 years. Mean post-operative range of motion was 117.3 ± 0.4°. Mean clinical and functional Knee Society Score were, respectively, 85.9 ± 1.1 and 84.7 ± 3.5 at final follow-up. Post-operative femorotibial alignment was 177.1 ± 0.5°. Alfa and beta angles were 95.7 ± 0.1° and 89.2 ± 0.1°, respectively. Gamma and delta angles were 2.3 ± 0.6° and 86.7 ± 0.4°. CONCLUSION Medial pivoting implants provided excellent survivorship and low revision rate, as well as good-to-excellent results in term of objective and patient-reported clinical outcomes, and reliable correction of radiographic parameters. More high-quality studies with long-term follow-up are needed to clarify the role of medial pivoting implants.
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Affiliation(s)
- Mattia Alessio-Mazzola
- Orthopedic Clinic, Ospedale Policlinico San Martino, Largo R. Benzi 10, 16132, Genoa, Italy.
- Department of Surgical Sciences and Integrated Diagnostic (DISC), University of Genoa, Viale Benedetto XV 6, 16132, Genoa, Italy.
| | - Antonio Clemente
- Orthopedic Clinic, Ospedale Policlinico San Martino, Largo R. Benzi 10, 16132, Genoa, Italy
- Department of Surgical Sciences and Integrated Diagnostic (DISC), University of Genoa, Viale Benedetto XV 6, 16132, Genoa, Italy
| | - Antonio Russo
- Orthopedic Clinic, Ospedale Policlinico San Martino, Largo R. Benzi 10, 16132, Genoa, Italy
- Department of Surgical Sciences and Integrated Diagnostic (DISC), University of Genoa, Viale Benedetto XV 6, 16132, Genoa, Italy
| | - Peter Mertens
- Orthopaedics and Traumatology Department, ZNA Middelheim, Antwerp, Belgium
| | - Giorgio Burastero
- Centro di Chirurgia Protesica, Istituto Ortopedico Galeazzi IRCCS, Via Riccardo Galeazzi 4, 20161, Milan, Italy
| | - Matteo Formica
- Orthopedic Clinic, Ospedale Policlinico San Martino, Largo R. Benzi 10, 16132, Genoa, Italy
- Department of Surgical Sciences and Integrated Diagnostic (DISC), University of Genoa, Viale Benedetto XV 6, 16132, Genoa, Italy
| | - Lamberto Felli
- Istituto Ortopedico Galeazzi IRCCS Chirurgia Articolare Sostitutiva e Chirurgia Ortopedica, Via Riccardo Galeazzi 4, 20161, Milan, Italy
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Cacciola G, Mancino F, De Meo F, Di Matteo V, Sculco PK, Cavaliere P, Maccauro G, De Martino I. Mid-term survivorship and clinical outcomes of the medial stabilized systems in primary total knee arthroplasty: A systematic review. J Orthop 2021; 24:157-164. [PMID: 33716421 DOI: 10.1016/j.jor.2021.02.022] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2021] [Accepted: 02/14/2021] [Indexed: 12/29/2022] Open
Abstract
Introduction Medial Pivot Total Knee Arthroplasty was introduced in clinical practice in 1990s to reproduce the in vivo-natural knee kinematics. This design is characterized by an asymmetric constraint profile, with aa highly congruent medial compartment, and a less congruent lateral compartment. Short-term outcomes of the medial pivot systems in primary knee arthroplasty have been widely reported in the current literature, however, only few studies have described results beyond 5-year follow-up. Objectives The primary objectives of this systematic review of the literature is to analyze the mid-term studies on medial pivot total knee arthroplasty focusing on the reoperation rate, survivorship and clinical outcome scores. Methods The US National Library of Medicine (PubMed/MEDLINE), EMBASE, and the Cochrane Database of Systematic Reviews were queried for publications from January 1980 to December 2019 utilizing the following keywords: "medial pivot", "medial stabilized", "medial rotating", "medial congruent", medial ball and socket", "arthroplasty", "TKA", "TKR", and "knee surgery". Results 18 articles met the inclusion criteria for the present study. The average quality was 11.4 for non-comparative studies and 21.7 for comparative studies based on MINORS criteria. A total 2832 knee arthroplasties were included for the final analysis with an average age of 69 years, and an average follow-up of 8.1 years (minimum 5 years). The overall reoperation rate was 2.4%, with periprosthetic joint infection as the leading cause of revision in 0.9% of cases, followed by aseptic loosening in 0.4% of cases. The average Knee Society Score improved to a mean preoperative score of 40.1 to a mean postoperative score of 89.2. The functional knee society score improved from a mean preoperative score of 44.8 to an average postoperative score of 82.9. The global range of motion improved from 104.8° preoperatively to 115.6° postoperatively. Conclusion We found that medial pivot system in primary total knee arthroplasty provide overall mid-term survivorship comparable to other standard implasnts. In addition, medial pivot system is associated with better high-end function compared to standard implants.
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Affiliation(s)
- Giorgio Cacciola
- GIOMI Istituto Ortopedico del Mezzogiorno d'Italia Franco Scalabrino, Ganzirri, Via Consolare Pompea, 98165, Messina, ME, Italy
| | - Fabio Mancino
- Adult Reconstruction and Joint Replacement Service, Division of Orthopaedics and Traumatology, Department of Aging, Neurological, Orthopaedic and Head-Neck Studies, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Largo Agostino Gemelli 8, Roma, RM, 00168, Italy.,Università Cattolica del Sacro Cuore, Largo Francesco Vito 1, Roma, RM, 00168, Italy
| | - Federico De Meo
- GIOMI Istituto Ortopedico del Mezzogiorno d'Italia Franco Scalabrino, Ganzirri, Via Consolare Pompea, 98165, Messina, ME, Italy
| | - Vincenzo Di Matteo
- Adult Reconstruction and Joint Replacement Service, Division of Orthopaedics and Traumatology, Department of Aging, Neurological, Orthopaedic and Head-Neck Studies, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Largo Agostino Gemelli 8, Roma, RM, 00168, Italy.,Università Cattolica del Sacro Cuore, Largo Francesco Vito 1, Roma, RM, 00168, Italy
| | - Peter K Sculco
- Stavros Niarchos Foundation, Complex Joint Reconstruction Center, Adult Reconstruction and Joint Replacement Division, Department of Orthopaedic Surgery, Hospital for Special Surgery, 535 East 70th Street, New York, NY, 10021, USA
| | - Pietro Cavaliere
- GIOMI Istituto Ortopedico del Mezzogiorno d'Italia Franco Scalabrino, Ganzirri, Via Consolare Pompea, 98165, Messina, ME, Italy
| | - Giulio Maccauro
- Adult Reconstruction and Joint Replacement Service, Division of Orthopaedics and Traumatology, Department of Aging, Neurological, Orthopaedic and Head-Neck Studies, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Largo Agostino Gemelli 8, Roma, RM, 00168, Italy.,Università Cattolica del Sacro Cuore, Largo Francesco Vito 1, Roma, RM, 00168, Italy
| | - Ivan De Martino
- Adult Reconstruction and Joint Replacement Service, Division of Orthopaedics and Traumatology, Department of Aging, Neurological, Orthopaedic and Head-Neck Studies, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Largo Agostino Gemelli 8, Roma, RM, 00168, Italy
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Alesi D, Marcheggiani Muccioli GM, Roberti di Sarsina T, Bontempi M, Pizza N, Zinno R, Di Paolo S, Zaffagnini S, Bragonzoni L. In vivo femorotibial kinematics of medial-stabilized total knee arthroplasty correlates to post-operative clinical outcomes. Knee Surg Sports Traumatol Arthrosc 2021; 29:491-497. [PMID: 32253483 DOI: 10.1007/s00167-020-05975-w] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2019] [Accepted: 03/30/2020] [Indexed: 12/22/2022]
Abstract
PURPOSE To evaluate if there was a correlation between in vivo kinematics of a medial-stabilized (MS) total knee arthroplasty (TKA) and post-operative clinical scores. We hypothesized that (1) a MS-TKA would produce a medial pivot movement and that (2) this specific pattern would be correlated with higher clinical scores. METHODS 18 patients were evaluated through clinical and functional scores evaluation (Knee Society Score clinical and functional, Womac, Oxford), and kinematically through dynamic radiostereometric analysis (RSA) at 9 months after MS-TKA, during the execution of a sit-to-stand and a lunge motor task. The anteroposterior (AP) Low Point translation of medial and lateral femoral compartments was compared through Student's t test (p < 0.05). A correlation analysis between scores and kinematics was performed through the Pearson's correlation coefficient r. RESULTS A significantly greater (p < 0.0001) anterior translation of the lateral compartment with respect to the medial one was found in both sit-to-stand (medial 2.9 mm ± 0.7 mm, lateral 7.1 mm ± 0.6 mm) and lunge (medial 5.3 mm ± 0.9 mm, lateral 10.9 mm ± 0.7 mm) motor tasks, thus resulting in a medial pivot pattern in about 70% of patients. Significant positive correlation in sit-to-stand was found between the peak of AP translation in the lateral compartment and clinical scores (r = 0.59 for Knee Society Score clinical and r = 0.61 for Oxford). Moreover, we found that the higher peak of AP translation of the medial compartment correlated with lower clinical scores (r = - 0.55 for Knee Society Score clinical, r = - 0.61 for Womac and r = - 0.53 for Oxford) in the lunge. A negative correlation was found between Knee Society Score clinical and VV laxity during sit-to-stand (r = - 0.56) and peak of external rotation in the lunge motor task (r = - 0.66). CONCLUSIONS The MS-TKA investigated produced in vivo a medial pivot movement in about 70% of patients in both examined motor tasks. There was a correlation between the presence of medial pivot and higher post-operative scores. LEVEL OF EVIDENCE IV.
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Affiliation(s)
- Domenico Alesi
- 2nd Orthopaedic and Traumatologic Clinic, IRCCS, Istituto Ortopedico Rizzoli, Via G.B. Pupilli 1, 40136, Bologna, Italy
| | - Giulio Maria Marcheggiani Muccioli
- 2nd Orthopaedic and Traumatologic Clinic, IRCCS, Istituto Ortopedico Rizzoli, Via G.B. Pupilli 1, 40136, Bologna, Italy. .,University of Bologna, Bologna, Italy.
| | - Tommaso Roberti di Sarsina
- 2nd Orthopaedic and Traumatologic Clinic, IRCCS, Istituto Ortopedico Rizzoli, Via G.B. Pupilli 1, 40136, Bologna, Italy
| | - Marco Bontempi
- 2nd Orthopaedic and Traumatologic Clinic, IRCCS, Istituto Ortopedico Rizzoli, Via G.B. Pupilli 1, 40136, Bologna, Italy
| | - Nicola Pizza
- 2nd Orthopaedic and Traumatologic Clinic, IRCCS, Istituto Ortopedico Rizzoli, Via G.B. Pupilli 1, 40136, Bologna, Italy
| | - Raffaele Zinno
- 2nd Orthopaedic and Traumatologic Clinic, IRCCS, Istituto Ortopedico Rizzoli, Via G.B. Pupilli 1, 40136, Bologna, Italy
| | - Stefano Di Paolo
- 2nd Orthopaedic and Traumatologic Clinic, IRCCS, Istituto Ortopedico Rizzoli, Via G.B. Pupilli 1, 40136, Bologna, Italy
| | - Stefano Zaffagnini
- 2nd Orthopaedic and Traumatologic Clinic, IRCCS, Istituto Ortopedico Rizzoli, Via G.B. Pupilli 1, 40136, Bologna, Italy.,University of Bologna, Bologna, Italy
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Sun X, Gao X, Sun X, Su Z. Comparison of clinical and radiographic results between total knee arthroplasties using medial pivot and posterior-stabilized prosthesis: A meta-analysis. Medicine (Baltimore) 2021; 100:e23809. [PMID: 33530177 PMCID: PMC7850707 DOI: 10.1097/md.0000000000023809] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Accepted: 11/19/2020] [Indexed: 01/05/2023] Open
Abstract
OBJECTIVE To evaluate the clinical and radiographic outcomes of total knee arthroplasties (TKA) between using medial-pivot (MP) and posterior-stabilized (PS) prosthesis. Does MP prosthesis and PS prosthesis influence the clinical results of a TKA? METHODS An electronic literature search of PubMed Medline and the Cochrane Library was performed from inception to October 1, 2019. A meta-analysis to compare postoperative outcomes of Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) score, Knee Society Score (KSS), range of motion (ROM), complications, and radiographic results between MP and PS prosthesis were conducted. RESULTS Seven eligible studies involving 934 adult patients (MP group, n = 461; PS group, n = 473) were identified for analysis. This study showed no significant difference between the 2 groups in the WOMAC scores, KSS, ROM, and complications (P > .05). The differences of the femorotibial angle, position of implant, and patellar tilt were also not significant between the 2 groups (P > .05). CONCLUSION The present meta-analysis has shown that patients with the MP prosthesis have similar clinical results as patients with PS prosthesis. Furthermore, the radiographic results, especially patella tilt angle, were also similar between the 2 groups. Therefore, surgeons should be aware that the types of prostheses are not a decisive factor to ensure successful operation.
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Affiliation(s)
| | | | | | - Zheng Su
- Department of Medical Oncology, Weifang People's Hospital, Weifang, China
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Shah RF, Bini S, Vail T. Data for registry and quality review can be retrospectively collected using natural language processing from unstructured charts of arthroplasty patients. Bone Joint J 2020; 102-B:99-104. [DOI: 10.1302/0301-620x.102b7.bjj-2019-1574.r1] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Aims Natural Language Processing (NLP) offers an automated method to extract data from unstructured free text fields for arthroplasty registry participation. Our objective was to investigate how accurately NLP can be used to extract structured clinical data from unstructured clinical notes when compared with manual data extraction. Methods A group of 1,000 randomly selected clinical and hospital notes from eight different surgeons were collected for patients undergoing primary arthroplasty between 2012 and 2018. In all, 19 preoperative, 17 operative, and two postoperative variables of interest were manually extracted from these notes. A NLP algorithm was created to automatically extract these variables from a training sample of these notes, and the algorithm was tested on a random test sample of notes. Performance of the NLP algorithm was measured in Statistical Analysis System (SAS) by calculating the accuracy of the variables collected, the ability of the algorithm to collect the correct information when it was indeed in the note (sensitivity), and the ability of the algorithm to not collect a certain data element when it was not in the note (specificity). Results The NLP algorithm performed well at extracting variables from unstructured data in our random test dataset (accuracy = 96.3%, sensitivity = 95.2%, and specificity = 97.4%). It performed better at extracting data that were in a structured, templated format such as range of movement (ROM) (accuracy = 98%) and implant brand (accuracy = 98%) than data that were entered with variation depending on the author of the note such as the presence of deep-vein thrombosis (DVT) (accuracy = 90%). Conclusion The NLP algorithm used in this study was able to identify a subset of variables from randomly selected unstructured notes in arthroplasty with an accuracy above 90%. For some variables, such as objective exam data, the accuracy was very high. Our findings suggest that automated algorithms using NLP can help orthopaedic practices retrospectively collect information for registries and quality improvement (QI) efforts. Cite this article: Bone Joint J 2020;102-B(7 Supple B):99–104.
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Affiliation(s)
- Romil F. Shah
- Department of Orthopedic Surgery, University of California - San Francisco, San Francisco, California, USA
| | - Stefano Bini
- Department of Orthopedic Surgery, University of California - San Francisco, San Francisco, California, USA
- Department of Orthopedic Surgery, University of Texas at Austin, Austin, Texas, USA
| | - Thomas Vail
- Department of Orthopedic Surgery, University of California - San Francisco, San Francisco, California, USA
- Department of Orthopedic Surgery, University of Texas at Austin, Austin, Texas, USA
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Cassar-Gheiti AJ, Jamieson PS, Radi M, Wolfstadt JI, Backstein DJ. Evaluation of the Medial Stabilized Knee Design Using Data From National Joint Registries and Current Literature. J Arthroplasty 2020; 35:1950-1955. [PMID: 32224003 DOI: 10.1016/j.arth.2020.02.026] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 02/02/2020] [Accepted: 02/12/2020] [Indexed: 02/01/2023] Open
Abstract
BACKGROUND Various designs of total knee arthroplasty (TKA) have provided satisfactory outcomes for the treatment of knee osteoarthritis for many years. The aim of the study is to evaluate the success and failure rate of the medial stabilized (MS) TKA design through national joint registries and the current literature. MATERIALS AND METHODS A comprehensive literature review using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses was carried out through PubMed and MEDLINE database. The international registries analyzed included the National Joint Registry, the Australian Orthopedic Association National Joint Replacement Registry, the Dutch Arthroplasty Register, the New Zealand Orthopedic Association Joint Registry, and the Michigan Arthroplasty Registry Collaborative Quality Initiative. We are reporting descriptive data which include means and percentages of survival rates and revision rates and number of years after the primary procedure. The revision rates and the cumulative revision rates are reported separately for each MS implant. RESULTS Our detailed review identified 5 of 12 registries and 25 of 550 studies reporting on the survivorship of an MS TKA design. There were a total of 3684 procedures between the 25 studies, with an average survivorship free of aseptic loosening of 99% at 6.9 years. There are 26,693 (2.5%) MS TKAs in the current National Joint Registry with a mean cumulative revision rate of 2.63% at 5 years, 3.35% at 10 years, and 4.6% at 15 years. The Australian Orthopedic Association National Joint Replacement Registry provides survivorship data on 19,249 (2.9%) MS TKAs, with a mean cumulative revision rate of 3.34% at 5 years, 7.4% at 10 years, and 8.1% at 15 years. The Dutch Arthroplasty Register contains survivorship data on 1490 MS designs and a mean revision rate of these implants is 0.8% at 1 year, 5.95% at 5 years, and 9.8% at 10 years. The Evolution MP is the only implant reported in the Michigan Arthroplasty Registry Collaborative Quality Initiative and has a revision rate of 2.28% at 3 years. CONCLUSION The MS TKA design has comparable results to traditional TKA designs across several joint registries and 25 studies in the literature.
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Affiliation(s)
- Adrian J Cassar-Gheiti
- Department of Orthopaedics, Mount Sinai Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Paul S Jamieson
- Department of Orthopaedics, Mount Sinai Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Mehran Radi
- Department of Orthopaedics, Mount Sinai Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Jesse I Wolfstadt
- Department of Orthopaedics, Mount Sinai Hospital, University of Toronto, Toronto, Ontario, Canada
| | - David J Backstein
- Department of Orthopaedics, Mount Sinai Hospital, University of Toronto, Toronto, Ontario, Canada
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Kulshrestha V, Sood M, Kanade S, Kumar S, Datta B, Mittal G. Early Outcomes of Medial Pivot Total Knee Arthroplasty Compared to Posterior-Stabilized Design: A Randomized Controlled Trial. Clin Orthop Surg 2020; 12:178-186. [PMID: 32489539 PMCID: PMC7237261 DOI: 10.4055/cios19141] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2019] [Accepted: 11/21/2019] [Indexed: 12/13/2022] Open
Abstract
Backgroud The indications for total knee arthroplasty (TKA) have been expanded to include younger, demanding patients. Some TKA patients expect a return to high-performance activities to restore optimum quality of life. The concept of the medial pivot (MP) TKA is that more natural knee kinematics can be achieved by altering the bearing design. In the present study, we compared the early outcomes of MP TKA with posterior-stabilized (PS) TKA in terms of patient-reported outcomes, function, and performance. Methods This randomized study was performed in a high volume joint replacement facility of a tertiary care military hospital. We enrolled 40 patients each in the MP group and PS group and assessed knee flexion, patient-reported outcome (new Knee Society Score [new KSS]), patient performance (Delaware Osteoarthritis Profile Score [DOPS]), and function (Forgotten Joint Score [FJS]) at 2 years after surgery. Results Compared to PS group patients, MP group patients had similar patient-reported outcomes assessed by new KSS (satisfaction, expectation, and activity scales) and FJS. MP knee patients had better performance in the timed up and go test (p < 0.026) and self-paced walk test (p < 0.002) of DOPS. The gain in knee flexion (9.3° ± 14°) compared to baseline was significantly greater in the PS group (p < 0.013). Conclusions When assessed by DOPS, getting up from chair and walking speed were significantly better in MP knee patients than in PS knee patients. However, considering the predictable rollback ensured by cam and post, the PS knee produced better knee flexion. Despite these results, patients were equally satisfied with the two designs.
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Affiliation(s)
| | - Munish Sood
- Department of Orthopaedics, Command Hospital, Chandigarh, India
| | - Sarang Kanade
- Department of Orthopaedics, Dr Shyama Prasad Mukherjee Hospital, Lucknow, India
| | - Santhosh Kumar
- Department of Orthopaedics and Joint Replacement, Command Hospital Air Force, Bengaluru, India
| | - Barun Datta
- Department of Orthopaedics, Joint Replacement Centre, Army Hospital R & R, New Delhi, India
| | - Gaurav Mittal
- Department of Orthopaedics, Military Hospital, Kilkee, India
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11
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Jones CW, Jacobs H, Shumborski S, Talbot S, Redgment A, Brighton R, Walter WL. Sagittal Stability and Implant Design Affect Patient Reported Outcomes After Total Knee Arthroplasty. J Arthroplasty 2020; 35:747-751. [PMID: 31735490 DOI: 10.1016/j.arth.2019.10.020] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Revised: 10/08/2019] [Accepted: 10/10/2019] [Indexed: 02/01/2023] Open
Abstract
BACKGROUND Joint stability is one of the goals of any joint replacement. The contribution of prosthesis design to sagittal stability in total knee arthroplasty (TKA) has emerged as an area of interest. The purpose of this study was to evaluate the sagittal stability of four prosthesis types and determine the effect on patient reported outcome measures (PROMs). METHODS A matched-cohort cross-sectional study was performed on 60 patients after TKA at 1-year follow-up. Three surgeons performed 10 medially stabilized (MS) TKA and 10 non-MS TKA. Sagittal stability was assessed by a blinded observer using a KT-1000 arthrometer, Lachman's test, and the anterior drawer test. PROMs (Oxford, Knee Injury and Osteoarthritis Outcome Score, Western Ontario and McMaster Universities Osteoarthritis Index, Forgotten joint score) and visual analog scale assessed function and satisfaction. RESULTS MS TKA had significantly decreased translation on KT-1000 and improved stability compared with non-MS TKA (P < .05). Increased PROMs were demonstrated in the MS TKA group compared with the non-MS TKA group (P < .05). When divided based on objective stability, regardless of the prosthesis type, patients with a stable knee had superior PROMs (P < .05), particularly in sport-related questions. CONCLUSION The MS TKA had significantly greater sagittal stability, improved PROMs, and satisfaction compared with non-MS TKA. Independent of prosthesis design, patients with greater sagittal stability demonstrated improved PROMs.
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Affiliation(s)
- Christopher W Jones
- Fiona Stanley Hospital Group & Orthopaedics WA, Perth, Australia; Curtin University, Perth, Australia; University of Sydney, Sydney, Australia
| | - Hans Jacobs
- Steve Biko Academic Hospital, The University of Pretoria, Pretoria, South Africa
| | | | - Simon Talbot
- Orthopaedic Department, Western Health, Melbourne, Australia
| | | | | | - William L Walter
- The University of Sydney & Northern Local Area Health District (Royal North Shore Hospital), Sydney, Australia
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12
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Samy DA, Wolfstadt JI, Vaidee I, Backstein DJ. A Retrospective Comparison of a Medial Pivot and Posterior-Stabilized Total Knee Arthroplasty With Respect to Patient-Reported and Radiographic Outcomes. J Arthroplasty 2018; 33:1379-1383. [PMID: 29276117 DOI: 10.1016/j.arth.2017.11.049] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Revised: 11/13/2017] [Accepted: 11/24/2017] [Indexed: 02/01/2023] Open
Abstract
BACKGROUND Medial pivot (MP) type total knee arthroplasty (TKA) implants are designed with a highly congruent medial tibiofemoral articulation. Compared with the cam-and-post design of the posterior-stabilized (PS) TKA, the MP-TKA design has been hypothesized to better replicate the natural kinematics of the knee. We compared the MP-TKA and PS-TKA designs, with our primary outcome measures being range of motion (ROM) and patient-reported satisfaction. METHODS This study was a retrospective comparison between the 2 groups (76 MP-TKA vs 88 PS-TKA). ROM was collected preoperatively, 6 weeks, 6 months, and 1 year postoperatively. The Forgotten Joint Score-12 (FJS-12) scores were collected at a minimum of 1 year postoperatively. RESULTS There was no statistically significant difference in age, gender, or body mass index between the groups. We found a statistical difference in preoperative ROM (MP = 120.3°, PS = 112.8°, P = .002). There was no difference in ΔROM at 6 weeks (MP = -12.36, PS = -3.79, P = .066), 6 months (MP = -4.23, PS = 2.73, P = .182), or 1 year (MP = .17, PS = 3.31, P = .499). Patients who underwent the MP-TKA scored significantly better than the PS-TKA on the FJS-12 score (MP = 59.72, PS = 44.77, P = .007). CONCLUSION We found that patients who underwent the MP-TKA scored better on the FJS than those who underwent the PS-TKA; particularly with regard to deep knee flexion and stability of the prosthesis. The MP-TKA design may offer improved patient outcomes because of its highly congruent medial tibiofemoral articulation.
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Affiliation(s)
- David A Samy
- Granovsky Gluskin Division of Orthopaedics, Sinai Health System, University of Toronto, Toronto, Ontario, Canada; University of Aberdeen, School of Medicine, Aberdeen, United Kingdom
| | - Jesse I Wolfstadt
- Granovsky Gluskin Division of Orthopaedics, Sinai Health System, University of Toronto, Toronto, Ontario, Canada
| | - Iman Vaidee
- Granovsky Gluskin Division of Orthopaedics, Sinai Health System, University of Toronto, Toronto, Ontario, Canada
| | - David J Backstein
- Granovsky Gluskin Division of Orthopaedics, Sinai Health System, University of Toronto, Toronto, Ontario, Canada
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13
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Young T, Dowsey MM, Pandy M, Choong PF. A Systematic Review of Clinical Functional Outcomes After Medial Stabilized Versus Non-Medial Stabilized Total Knee Joint Replacement. Front Surg 2018; 5:25. [PMID: 29696144 PMCID: PMC5905240 DOI: 10.3389/fsurg.2018.00025] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2017] [Accepted: 03/05/2018] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND Medial stabilized total knee joint replacement (TKJR) construct is designed to closely replicate the kinematics of the knee. Little is known regarding comparison of clinical functional outcomes of patients utilising validated patient reported outcome measures (PROM) after medial stabilized TKJR and other construct designs. PURPOSE To perform a systematic review of the available literature related to the assessment of clinical functional outcomes following a TKJR employing a medial stabilized construct design. METHODS The review was performed with a Preferred Reporting Items for Systematic Review and Meta-Analyses (PRISMA) algorithm. The literature search was performed using variouscombinations of keywords. The statistical analysis was completed using Review Manager (RevMan), Version 5.3. RESULTS In the nineteen unique studies identified, there were 2,448 medial stabilized TKJRs implanted in 2,195 participants, there were 1,777 TKJRs with non-medial stabilized design constructs implanted in 1,734 subjects. The final mean Knee Society Score (KSS) value in the medial stabilized group was 89.92 compared to 90.76 in the non-medial stabilized group, with the final KSS mean value difference between the two groups was statistically significant and favored the non-medial stabilized group (SMD 0.21; 95% CI: 0.01 to 0.41; p = 004). The mean difference in the final WOMAC values between the two groups was also statistically significant and favored the medial stabilized group (SMD: -0.27; 95% CI: -0.47 to -0.07; p = 0.009). Moderate to high values (I2 ) of heterogeneity were observed during the statistical comparison of these functional outcomes. CONCLUSION Based on the small number of studies with appropriate statistical analysis, we are unable to reach a clear conclusion in the clinical performance of medial stabilized knee replacement construct. LEVEL OF EVIDENCE Level II.
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Affiliation(s)
- Tony Young
- Department of Surgery, University of Melbourne, St. Vincent’s Hospital Melbourne, Fitzroy, VIC, Australia
- Department of Orthopaedic Surgery, St. Vincent’s Hospital Melbourne, Fitzroy, VIC, Australia
| | - Michelle M. Dowsey
- Department of Surgery, University of Melbourne, St. Vincent’s Hospital Melbourne, Fitzroy, VIC, Australia
- Department of Orthopaedic Surgery, St. Vincent’s Hospital Melbourne, Fitzroy, VIC, Australia
| | - Marcus Pandy
- Department of Mechanical Engineering, Melbourne School of Engineering, University of Melbourne, Parkville, VIC, Australia
| | - Peter F. Choong
- Department of Surgery, University of Melbourne, St. Vincent’s Hospital Melbourne, Fitzroy, VIC, Australia
- Department of Orthopaedic Surgery, St. Vincent’s Hospital Melbourne, Fitzroy, VIC, Australia
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14
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Kim YH, Park JW, Kim JS. Clinical Outcome of Medial Pivot Compared With Press-Fit Condylar Sigma Cruciate-Retaining Mobile-Bearing Total Knee Arthroplasty. J Arthroplasty 2017; 32:3016-3023. [PMID: 28601246 DOI: 10.1016/j.arth.2017.05.022] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2016] [Revised: 04/19/2017] [Accepted: 05/10/2017] [Indexed: 02/01/2023] Open
Abstract
BACKGROUND The purpose of this study was to compare the long-term clinical results, radiographic results, range of knee motion, patient satisfaction, and the survival rate of Medial-Pivot posterior cruciate-substituting, knee prosthesis and a press-fit condylar (PFC) Sigma cruciate-retaining mobile-bearing knee prosthesis in the same patients. METHODS One hundred eighty-two patients received Medial-Pivot knee prosthesis in one knee and a PFC Sigma knee prosthesis in the contralateral knee. The minimum duration of follow-up was 11 years (range, 11-12.6 years). RESULTS The knees with a Medial-Pivot knee prosthesis had significantly worse results than those with a PFC Sigma knee prosthesis at the final follow-up with regard to the mean postoperative Knee Society knee scores (90 compared with 95 points), Western Ontario and McMaster Universities Osteoarthritis Index score (25 compared with 18 points), and range of knee motion (117° compared with 128°). Patients were more satisfied with PFC Sigma knee prosthesis (93%) than with Medial-Pivot knee prosthesis (75%). Complication rates were significantly higher in the Medial-Pivot knee group (26%) than those in the PFC Sigma knee group (6.5%). Radiographic results and survival rates (99% compared with 99.5%) were similar between the 2 groups. CONCLUSION Although the long-term fixation and survival rate of both Medial-Pivot and PFC Sigma prostheses were similar, we observed a worse knee score, worse range of knee motion, and patient satisfaction was less in the Medial-Pivot knee group than in the PFC Sigma knee group. Furthermore, complication rate was also higher in the Medial-Pivot knee group than the other group.
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Affiliation(s)
- Young-Hoo Kim
- The Joint Replacement Center, Ewha Womans University, Seonam Hospital, Seoul, Republic of Korea
| | - Jang-Won Park
- The Joint Replacement Center, Ewha Womans University, Mokdong Hospital, Seoul, Republic of Korea
| | - Jun-Shik Kim
- The Joint Replacement Center, Ewha Womans University, Mokdong Hospital, Seoul, Republic of Korea
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15
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Choi NY, In Y, Bae JH, Do JH, Chung SJ, Koh IJ. Are Midterm Patient-Reported Outcome Measures Between Rotating-Platform Mobile-Bearing Prosthesis and Medial-Pivot Prosthesis Different? A Minimum of 5-Year Follow-Up Study. J Arthroplasty 2017; 32:824-829. [PMID: 27667531 DOI: 10.1016/j.arth.2016.08.028] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2015] [Revised: 07/23/2016] [Accepted: 08/22/2016] [Indexed: 02/01/2023] Open
Abstract
BACKGROUND Both rotating-platform (RP) mobile-bearing and medial-pivot (MP) fixed-bearing prostheses allow axial femorotibial rotation using a highly conforming polyethylene insert. However, limited comparative data are available between the 2 designs. This study was performed to compare the midterm clinical outcomes and patient-reported outcome measures (PROMs) of RP and MP prostheses. METHODS We retrospectively reviewed the records of 52 total knee arthroplasties using RP mobile-bearing prosthesis and 49 total knee arthroplasties using MP fixed prosthesis with a minimum follow-up period of 5 years. Clinical and radiological outcomes, failure rates, and PROMs, including the Western Ontario and McMaster Universities Osteoarthritis Index score and satisfaction, were compared. RESULTS There was no difference in clinical or radiographic outcomes (P > .1 for all comparisons), with the exception of the larger flexion contracture (FC) in the MP group (0.3° in RP vs 2.3° in MP, P < .01). No failure in either group was recorded during the study period. PROMs were comparable (P > .1 in all comparisons), with the exception of higher satisfactions in the RP group while performing light household duties (P < .01) and leisure or recreational activities (P = .014) in patients without FC. CONCLUSION The midterm clinical results with both the RP mobile-bearing and MP fixed-bearing prostheses were satisfactory. Although both prostheses provided comparable PROMs, patients with an RP prosthesis were more satisfied than those with an MP prosthesis for highly demanding activities that are strongly associated with the presence of postoperative FC.
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Affiliation(s)
- Nam Y Choi
- Department of Orthopaedic Surgery, St. Paul's Hospital, Seoul, Korea; Department of Orthopaedic Surgery, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Yong In
- Department of Orthopaedic Surgery, College of Medicine, The Catholic University of Korea, Seoul, Korea; Department of Orthopaedic Surgery, Seoul St. Mary's Hospital, Seoul, Korea
| | - Jae-Ho Bae
- Department of Orthopaedic Surgery, St. Paul's Hospital, Seoul, Korea
| | - Jung-Hoon Do
- Department of Orthopaedic Surgery, St. Paul's Hospital, Seoul, Korea
| | - Seung J Chung
- Department of Orthopaedic Surgery, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - In J Koh
- Department of Orthopaedic Surgery, College of Medicine, The Catholic University of Korea, Seoul, Korea; Department of Orthopaedic Surgery, Seoul St. Mary's Hospital, Seoul, Korea
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16
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A long term clinical outcome of the Medial Pivot Knee Arthroplasty System. Knee 2017; 24:447-453. [PMID: 28143683 DOI: 10.1016/j.knee.2017.01.008] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2016] [Revised: 01/15/2017] [Accepted: 01/18/2017] [Indexed: 02/02/2023]
Abstract
BACKGROUND The ideal total knee arthroplasty (TKA) should provide maximum range of motion and functional stability for all desired daily activities and, if possible, to replicate normal knee kinematics and function. The ADVANCE® Medial Pivot (AMP) Knee System was designed with a highly congruent medial compartment and a less conforming lateral compartment to more closely mimic the kinematics of the normal knee and to offer more stability through out of range of motion (ROM). The purpose of this study was to evaluate the long-term clinical and radiographic outcomes of this TKA system. METHODS Three hundred and twenty-five (325) patients (347 knees) with knee osteoarthritis underwent a TKA using the AMP prosthesis in our Department. For evaluation, objective and subjective clinical rating systems along with radiograph series were used. The average follow-up was 15.2years. RESULTS All patients showed a statistically significant improvement (p<0.0005) in the Knee Society clinical rating system, Western Ontario and McMaster Universities Osteoarthritis Index questionnaire, SF-12® questionnaire, and Oxford knee score. The majority of patients (94%) were able to perform age-appropriate activities with a mean knee flexion of 120° (range, 105°-135°) at final follow-up. Survival analysis showed a cumulative success rate of 98.8% at 17years. CONCLUSION The obtained results demonstrate excellent long-term clinical outcome for this knee design.
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17
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Karachalios T, Varitimidis S, Bargiotas K, Hantes M, Roidis N, Malizos KN. An 11- to 15-year clinical outcome study of the Advance Medial Pivot total knee arthroplasty. Bone Joint J 2016; 98-B:1050-5. [DOI: 10.1302/0301-620x.98b8.36208] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Accepted: 04/01/2016] [Indexed: 11/05/2022]
Abstract
Aims The Advance Medial-Pivot total knee arthroplasty (TKA) was designed to reflect contemporary data regarding the kinematics of the knee. We wished to examine the long-term results obtained with this prosthesis by extending a previous evaluation. Patients and Methods We retrospectively evaluated prospectively collected data from 225 consecutive patients (41 men and 184 women; mean age at surgery 71 years, 52 to 84) who underwent 284 TKAs with a mean follow-up of 13.4 years (11 to 15). Implant failure, complication rate, clinical (both subjective and objective) and radiological outcome were assessed. Pre- and post-operative clinical and radiographic data were available at regular intervals for all patients. A total of ten patients (4.4%; ten TKAs) were lost to follow-up. Results Survival analysis at 15 years showed a cumulative success rate of 97.3% (95% confidence interval (CI) 96.7 to 97.9) for revision for any reason, of 96.4% (95% CI 95.2 to 97.6) for all operations, and 98.8% (95% CI 98.2 to 99.4) for aseptic loosening as an end point. Three TKAs (1.06%) were revised due to aseptic loosening, two (0.7%) due to infection, one (0.35%) due to instability and one (0.35%) due to a traumatic dislocation. All patients showed a statistically significant improvement on the Knee Society Score (p = 0.001), Western Ontario and McMaster University Osteoarthritis Index (p = 0.001), Short Form-12 (p = 0.01), and Oxford Knee Score (p = 0.01). A total of 207 patients (92%) were able to perform age appropriate activities with a mean flexion of the knee of 117° (85° to 135°) at final follow-up. Conclusion This study demonstrates satisfactory functional and radiographic long-term results for this implant. Cite this article: Bone Joint J 2016;98-B:1050–5.
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Affiliation(s)
- Th. Karachalios
- University of Thessalia, School
of Health Sciences, Faculty of Medicine, University
General Hospital, Biopolis, Larissa
41110, Greece
| | - S. Varitimidis
- University of Thessalia, School
of Health Sciences, Faculty of Medicine, University
General Hospital, Biopolis, Larissa
41110, Greece
| | - K. Bargiotas
- University of Thessalia, School
of Health Sciences, Faculty of Medicine, University
General Hospital, Biopolis, Larissa
41110, Greece
| | - M. Hantes
- University of Thessalia, School
of Health Sciences, Faculty of Medicine, University
General Hospital, Biopolis, Larissa
41110, Greece
| | - N. Roidis
- KAT General Hospital, Athens
41110, Greece
| | - K. N. Malizos
- University of Thessalia, School
of Health Sciences, Faculty of Medicine, University
General Hospital, Biopolis, Larissa
41110, Greece
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18
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Bae DK, Cho SD, Im SK, Song SJ. Comparison of Midterm Clinical and Radiographic Results Between Total Knee Arthroplasties Using Medial Pivot and Posterior-Stabilized Prosthesis-A Matched Pair Analysis. J Arthroplasty 2016; 31:419-24. [PMID: 26482685 DOI: 10.1016/j.arth.2015.09.038] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Revised: 08/31/2015] [Accepted: 09/15/2015] [Indexed: 02/01/2023] Open
Abstract
BACKGROUND Despite the theoretical advantage of a knee design that can more reliably replicate the medial pivot (MP) of the natural knee, only a few clinical studies have compared the clinical results between the MP prosthesis and another design of prosthesis. We compared the midterm results of total knee arthroplasty (TKA) using an MP prosthesis vs a posterior-stabilized prosthesis via a matched-pair analysis; we included results related to patellofemoral joint symptoms. METHODS The midterm clinical and radiographic results of 125 consecutive patients (150 knees) who underwent a TKA with the ADVANCE MP prosthesis were compared with those of a control group who had undergone a primary TKA with a posterior-stabilized prosthesis. RESULTS Values of the Knee Society's Knee Scoring System, Western Ontario and McMaster Universities Osteoarthritis Index, and Kujala and Feller scoring systems, as well as the range of motion after TKA, did not significantly differ between the 2 groups. No differences in femorotibial angle and component position, including the patella component, were observed between the 2 groups. No significant differences in the change of patella tilt angle and the postoperative patellar translation were observed between the 2 groups. CONCLUSION Patients with the MP prosthesis experienced satisfactory pain relief and a functional recovery, providing results similar to those of the posterior-stabilized prosthesis, including the resolution of patellofemoral joint symptoms.
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Affiliation(s)
- Dae Kyung Bae
- Department of Orthopaedic Surgery, School of Medicine, Kyung Hee University, Seoul, Korea
| | - Sung Do Cho
- Department of Orthopaedic Surgery, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea
| | - Sang Kyu Im
- Department of Orthopaedic Surgery, School of Medicine, Kyung Hee University, Seoul, Korea
| | - Sang Jun Song
- Department of Orthopaedic Surgery, School of Medicine, Kyung Hee University, Seoul, Korea
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19
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Varadarajan KMM, Zumbrunn T, Rubash HE, Malchau H, Li G, Muratoglu OK. Cruciate Retaining Implant With Biomimetic Articular Surface to Reproduce Activity Dependent Kinematics of the Normal Knee. J Arthroplasty 2015; 30:2149-53.e2. [PMID: 26154569 DOI: 10.1016/j.arth.2015.06.018] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Revised: 05/18/2015] [Accepted: 06/08/2015] [Indexed: 02/01/2023] Open
Abstract
Alterations in normal knee kinematics following total knee arthroplasty (TKA) arise in part from the non-anatomic articular geometry of contemporary implants. In this study, the kinematics of a novel posterior cruciate-retaining (CR) implant with anatomic (biomimetic) articular surface, were compared to that of contemporary CR implants during various simulated activities. Across different simulated activities the biomimetic-CR mimicked normal kinematic patterns more closely than contemporary CR implants. In particular, during deep knee bend and chair-sit, the biomimetic-CR showed medial pivot motion, while other CR implants showed abnormal motion including lateral pivot or no pivot, and paradoxical anterior sliding. Further in vivo and clinical studies are needed to determine whether such biomimetic implants can truly help to achieve a more normal feeling knee and improved patient satisfaction.
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Affiliation(s)
- Kartik Mangudi M Varadarajan
- Technology Implementation Research Center, Department of Orthopaedic Surgery, Massachusetts General Hospital, Boston, Massachusetts
| | - Thomas Zumbrunn
- Technology Implementation Research Center, Department of Orthopaedic Surgery, Massachusetts General Hospital, Boston, Massachusetts
| | - Harry E Rubash
- Technology Implementation Research Center, Department of Orthopaedic Surgery, Massachusetts General Hospital, Boston, Massachusetts
| | - Henrik Malchau
- Technology Implementation Research Center, Department of Orthopaedic Surgery, Massachusetts General Hospital, Boston, Massachusetts
| | - Guoan Li
- Bioengineering Laboratory, Department of Orthopaedic Surgery, Massachusetts General Hospital, Boston, Massachusetts
| | - Orhun K Muratoglu
- Technology Implementation Research Center, Department of Orthopaedic Surgery, Massachusetts General Hospital, Boston, Massachusetts
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20
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Zumbrunn T, Varadarajan KM, Rubash HE, Malchau H, Li G, Muratoglu OK. Regaining Native Knee Kinematics Following Joint Arthroplasty: A Novel Biomimetic Design with ACL and PCL Preservation. J Arthroplasty 2015. [PMID: 26195354 DOI: 10.1016/j.arth.2015.06.017] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Lack of ACL and non-anatomic articular surfaces in contemporary total knee implants result in kinematic abnormalities. We hypothesized that such abnormalities may be addressed with a biomimetic bi-cruciate retaining (BCR) design having anatomical articular surfaces. We used dynamic computer simulations to compare kinematics among the biomimetic BCR, a contemporary BCR and cruciate-retaining implant for activities of daily living. During simulated deep knee bend, chair-sit and walking, the biomimetic BCR implant showed activity dependent kinematics similar to healthy knees in vivo. Restoring native knee geometry together with ACL preservation provided these kinematic improvements over contemporary ACL-preserving and ACL-sacrificing implants. Further clinical studies are required to determine if such biomimetic implants can result in more normal feeling knees and improve quality of life for active patients.
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Affiliation(s)
- Thomas Zumbrunn
- Technology Implementation Research Center, Department of Orthopaedic Surgery, Massachusetts General Hospital, Boston, Massachusetts; Department of Health Sciences and Technology, ETH Zürich (Swiss Federal Institute of Technology), Zurich, Switzerland
| | - Kartik Mangudi Varadarajan
- Technology Implementation Research Center, Department of Orthopaedic Surgery, Massachusetts General Hospital, Boston, Massachusetts
| | - Harry E Rubash
- Technology Implementation Research Center, Department of Orthopaedic Surgery, Massachusetts General Hospital, Boston, Massachusetts
| | - Henrik Malchau
- Technology Implementation Research Center, Department of Orthopaedic Surgery, Massachusetts General Hospital, Boston, Massachusetts
| | - Guoan Li
- Bioengineering Laboratory, Department of Orthopaedic Surgery, Massachusetts General Hospital, Boston, Massachusetts
| | - Orhun K Muratoglu
- Technology Implementation Research Center, Department of Orthopaedic Surgery, Massachusetts General Hospital, Boston, Massachusetts
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