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Beiene ZA, Tanghe KK, Neitzke CC, Hidaka C, Lyman S, Gausden EB, McLawhorn AS. Patient Selection in Randomized Controlled Trials of Total Knee Arthroplasty: A Systematic Review Assessing Inclusion Criteria. J Bone Joint Surg Am 2024; 106:553-563. [PMID: 38252710 DOI: 10.2106/jbjs.23.00629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
BACKGROUND Patients undergo total knee arthroplasty (TKA) at widely disparate stages of osteoarthritis, raising the possibility of high heterogeneity among patients enrolled in TKA research studies. Obscuration of treatment effectiveness and other problems that may stem from cohort heterogeneity can be controlled in clinical studies by rigorously defining target patients. The purpose of this review was to determine the extent to which randomized controlled trials (RCTs) on TKA use osteoarthritis severity, as defined by radiographic grade or patient-reported outcome measures (PROMs), in their inclusion criteria, and to investigate potential impact on outcome. METHODS A search of PubMed, Embase, Scopus, Web of Science, and Cochrane databases used a combination of terms involving TKA, PROMs, and radiographic scoring. A total of 1,227 studies were independently reviewed by 2 screeners for the above terms. RCTs with ≥100 patients (236) and with <100 patients (325) undergoing TKA were analyzed with regard to the specific inclusion criteria and recruitment process. RESULTS Among the identified RCTs with ≥100 patients, 18 (<8%, with a total of 2,952 randomized patients) used specific radiographic scoring or PROM thresholds in their inclusion criteria. Eleven of the 18 studies used specific radiographic scoring, such as the Kellgren-Lawrence or Ahlbäck classifications. Three studies used preoperative PROM thresholds: Knee Society Knee Score of <60, Knee Society Function Score of <60, Oxford Knee Score of <20, and Hospital for Special Surgery Score of <60. Among studies with <100 patients, 48 (<15%) used specific inclusion criteria. CONCLUSIONS The vast majority of RCTs (>85%) did not enroll patients based on disease severity, as measured by PROM score thresholds or radiographic classifications, in their inclusion criteria. The lack of consistent inclusion criteria likely results in heterogeneous cohorts, potentially undermining the validity of RCTs on TKA. LEVEL OF EVIDENCE Prognostic Level I . See Instructions for Authors for a complete description of levels of evidence.
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Affiliation(s)
- Zodina A Beiene
- Department of Anesthesiology and Critical Care, Johns Hopkins Hospital, Baltimore, Maryland
| | | | - Colin C Neitzke
- Adult Reconstruction and Joint Replacement Service, Hospital for Special Surgery, New York, NY
| | - Chisa Hidaka
- Department of Orthopedic Surgery, Hospital for Special Surgery, New York, NY
| | - Stephen Lyman
- Healthcare Research Institute, Hospital for Special Surgery, New York, NY
| | - Elizabeth B Gausden
- Department of Orthopedic Surgery, Hospital for Special Surgery, New York, NY
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Bakircioglu S, Aksoy T, Caglar O, Mazhar Tokgozoglu A, Atilla B. Joint awareness after fixed and mobile-bearing total knee arthroplasty with minimum 12 years of follow-up: A propensity matched-pair analysis. Knee 2023; 42:130-135. [PMID: 37001329 DOI: 10.1016/j.knee.2023.03.004] [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: 10/04/2022] [Revised: 01/27/2023] [Accepted: 03/09/2023] [Indexed: 06/19/2023]
Abstract
BACKGROUND Many comparative articles studied mobile-bearing (MB) and fixed-bearing (FB) total knee arthroplasties (TKAs). Meta-analyses found no difference in survival or biomechanical outcome. This study aimed to compare long-term clinical results between fixed-bearing (FB) and mobile-bearing (MB) total knee arthroplasty (TKA) as well as patients' adaptation to their artificial joints. METHOD TKAs performed with the same surgical protocol divided into categories according to the insert design preferred. 70 MB design TKAs were compared with 70 FB design TKAs utilizing propensity matching for parameters; gender, age, body mass index, coronal plane deformity, range of motion (ROM) and appropriateness criteria. Forgotten Joint Score-12 (FJS-12) was used to assess patients' ability to forget their artificial joints in daily life. RESULTS Patients had a mean follow-up of 15.6 (±2.2) years. No difference was observed between groups for post-operative ROM, WOMAC, Knee Society Knee and Function Scores. The FJS-12 in the MB and FB groups were 66.1 and 72.8, respectively (P = 0.026). There was no significant difference in survival between both designs. CONCLUSION This study suggests that in TKA, joint awareness is higher in MB compared to FB design. FJS-12 appears to be a sensitive measuring tool when comparing two designs and should be implemented in long-term follow-up.
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Affiliation(s)
- Sancar Bakircioglu
- TOBB Economy and Technology University, Department of Orthopedics and Traumatology, Turkey.
| | - Taha Aksoy
- Hacettepe University, Department of Orthopedics and Traumatology, Turkey.
| | - Omur Caglar
- Hacettepe University, Department of Orthopedics and Traumatology, Turkey.
| | | | - Bulent Atilla
- Hacettepe University, Department of Orthopedics and Traumatology, Turkey.
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A Postmortem Analysis of Polyethylene Damage and Periprosthetic Tissue in Rotating Platform and Fixed Bearing Tibial Inserts. J Arthroplasty 2022; 37:1203-1209. [PMID: 35183710 DOI: 10.1016/j.arth.2022.02.051] [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: 10/29/2021] [Revised: 01/25/2022] [Accepted: 02/11/2022] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND Mobile bearing designs are intended to reduce wear, but mixed results were reported from retrieval analyses. Postmortem evaluation (PM) provides the opportunity to assess polyethylene damage in successful implants. We compared damage patterns, MRI presentation, and histology between mobile-bearing and fixed tibial inserts retrieved postmortem and compared these results to our prior findings from implants retrieved at revision. METHODS Eleven postmortem knees with rotating platform (RP) implants and 13 with fixed bearing (FB) implants were examined. All were MRI scanned, and tissue samples were collected from standardized regions for histology. Polyethylene inserts were subjectively scored to assess articular, backside, and PS post surfaces for damage modes and severity. RESULTS Average duration of implantation was 9.3 years (1.7-19.6 years). Surface burnishing was the most common polyethylene damage mode. Average damage scores were higher for RP (53.4) compared to FB inserts (34.4) due to greater backside damage (13.4 for RP vs 1.4 for FB). A minimal difference in damage was observed on the articular surfaces (37.4 RP vs 30.0 FB). Mild innate macrophage reactions were seen in 8 (72.7%) RP and 5 (45.5%) FB specimens. Polyethylene particles were identified in 7 (63.6%) RP and 3 (27.7%) FB specimens. CONCLUSIONS Postmortem inserts showed low damage levels and mild tissue reactions compared to those reported for implants removed at revision arthroplasty. Nonetheless, trends in comparing RP and FB inserts were consistent with those seen in retrieval analyses, demonstrating the usefulness of retrieval studies in capturing performance differences among TKA designs.
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No difference between mobile and fixed bearing in primary total knee arthroplasty: a meta-analysis. Knee Surg Sports Traumatol Arthrosc 2022; 30:3138-3154. [PMID: 35861866 PMCID: PMC9418337 DOI: 10.1007/s00167-022-07065-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Accepted: 07/01/2022] [Indexed: 11/09/2022]
Abstract
PURPOSE Both mobile (MB) and fixed (FB) bearing implants are routinely used for total knee arthroplasty (TKA). This meta-analysis compared MB versus FB for TKA in terms of implant positioning, joint function, patient reported outcome measures (PROMs), and complications. It was hypothesised that MB performs better than FB implants in primary TKA. METHODS This meta-analysis was conducted according to the 2020 PRISMA statement. In February 2022, the following databases were accessed: Pubmed, Web of Science, Google Scholar, Embase. All the randomized clinical trials (RCTs) comparing mobile versus fixed bearing for primary TKA were considered. RESULTS Data from 74 RCTs (11,116 procedures) were retrieved. The mean follow-up was 58.8 (7.5 to 315.6) months. The MB group demonstrated greater range of motion (ROM) (P = 0.02), Knee Society Score (KSS) score (P < 0.0001), and rate of deep infections (P = 0.02). No difference was found in implant positioning: tibial slope, delta angle, alpha femoral component angle, gamma femoral component angle, beta tibial component angle, tibiofemoral alignment angle, posterior condylar offset, radiolucent lines. No difference was found in duration of the surgical procedure. No difference was found in the following PROMs: Oxford Knee Score (OKS), Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), visual analogue scale (VAS), function and pain subscales of the KSS score. No difference was found in the rate of anterior knee pain, revision, aseptic loosening, fractures, and deep vein thrombosis. CONCLUSION There is no evidence in support that MB implants promote greater outcomes compared to FB implants in primary TKA. LEVEL OF EVIDENCE Level I.
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Smith LA, LaCour MT, Dennis DA, Komistek RD. Anatomic vs Dome Patella: Is There a Difference Between Fixed- vs Mobile-Bearing Posterior-Stabilized Total Knee Arthroplasties? J Arthroplasty 2021; 36:3773-3780. [PMID: 34362598 DOI: 10.1016/j.arth.2021.07.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 07/09/2021] [Accepted: 07/12/2021] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND It has been hypothesized that the patella, working in conjunction with both medial and lateral femoral condyles, can influence kinematic parameters such as posterior femoral rollback and axial rotation. The objective of this study is to determine the in vivo kinematics of subjects implanted with a fixed-bearing (FB) or mobile-bearing (MB) posterior-stabilized (PS) total knee arthroplasty (TKA), with a specific focus on evaluating the impact that Anatomic and Medialized Dome patellar components have on tibiofemoral kinematic patterns. METHODS Tibiofemoral kinematics were assessed for 40 subjects; 20 with an anatomic patella and 20 with a dome patella. Within these groups, 10 subjects received an FB PS TKA and 10 subjects received an MB PS TKA. All subjects were analyzed using fluoroscopy while performing a deep knee bend activity. Kinematics were collected during specific intervals to determine similarities and differences in regard to patella and bearing type. RESULTS The greatest variation in kinematics was detected between the 2 Anatomic patellar groups. Specifically, the MB-Anatomic subjects experienced greater translation of the lateral condyle, the highest magnitude of axial rotation, and the highest range of motion compared to the FB-Anatomic subjects. Subjects with a Dome Patella displayed much variability among the average kinematics, with all parameters between FB and MB cohorts being similar. CONCLUSION The findings in this study suggest that subjects with an Anatomic patellar component could have more normal kinematic patterns with an MB PS TKA as opposed to an FB PS TKA, while subjects with a Dome patella could achieve similar kinematics regardless of TKA type.
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Affiliation(s)
- Lauren A Smith
- Center for Musculoskeletal Research, University of Tennessee-Knoxville, Knoxville, TN
| | - Michael T LaCour
- Center for Musculoskeletal Research, University of Tennessee-Knoxville, Knoxville, TN
| | | | - Richard D Komistek
- Center for Musculoskeletal Research, University of Tennessee-Knoxville, Knoxville, TN
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Hantouly AT, Ahmed AF, Alzobi O, Toubasi A, Salameh M, Elmhiregh A, Hameed S, Ahmed GO, Alvand A, Al Dosari MAA. Mobile-bearing versus fixed-bearing total knee arthroplasty: a meta-analysis of randomized controlled trials. EUROPEAN JOURNAL OF ORTHOPAEDIC SURGERY AND TRAUMATOLOGY 2021; 32:481-495. [PMID: 34021791 PMCID: PMC8924090 DOI: 10.1007/s00590-021-02999-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Accepted: 04/09/2021] [Indexed: 11/24/2022]
Abstract
Objective The purpose of this study was to perform a meta-analysis comparing mobile-bearing with fixed-bearing total knee arthroplasty (TKA) in terms of all-cause revision rates, aspetic loosening, knee functional scores, range of motion and radiographic lucent lines and osteolysis. Methods PubMed, Cochrane Library, Google Scholar and Web of Science were searched up to January 2020. Randomized controlled trials that compared primary mobile-bearing with fixed-bearing TKA, reporting at least one of the outcomes of interest, at a minimum follow-up of 12 months were included. All outcomes of interest were pooled at short-term (< 5 years), mid-term (5 to 9 years) and long-term (> = 10 years) follow-up intervals. Results A total of 70 eligible articles were included in the qualitative and statistical analyses. There was no difference between mobile-bearing or fixed-bearing TKA at short-term, mid-term and long-term follow-ups in all outcome measures including all-cause revision rate, aseptic loosening, oxford knee score, knee society score, Hospital for Special Surgery score, maximum knee flexion, radiographic lucent lines and radiographic osteolysis. Conclusion The current level of evidence demonstrated that both mobile-bearing and fixed-bearing designs achieved excellent outcomes, yet it does not prove the theoretical advantages of the mobile-bearing insert over its fixed-bearing counterpart. The use of either design could therefore be supported based on the outcomes assessed in this study. Level of Evidence: Level II, Therapeutic Supplementary information The online version contains supplementary material available at (10.1007/s00590-021-02999-x).
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Affiliation(s)
- Ashraf T Hantouly
- Department of Orthopaedic Surgery, Surgical Specialty Center, Hamad Medical Corporation, Doha, Qatar
| | - Abdulaziz F Ahmed
- Department of Orthopaedic Surgery, Surgical Specialty Center, Hamad Medical Corporation, Doha, Qatar.
| | - Osama Alzobi
- Department of Orthopaedic Surgery, Surgical Specialty Center, Hamad Medical Corporation, Doha, Qatar
| | - Ammar Toubasi
- Department of Orthopaedic Surgery, Surgical Specialty Center, Hamad Medical Corporation, Doha, Qatar
| | - Motasem Salameh
- Department of Orthopaedic Surgery, Surgical Specialty Center, Hamad Medical Corporation, Doha, Qatar
| | - Aissam Elmhiregh
- Department of Orthopaedic Surgery, Surgical Specialty Center, Hamad Medical Corporation, Doha, Qatar
| | - Shamsi Hameed
- Department of Orthopaedic Surgery, Surgical Specialty Center, Hamad Medical Corporation, Doha, Qatar
| | - Ghalib O Ahmed
- Department of Orthopaedic Surgery, Surgical Specialty Center, Hamad Medical Corporation, Doha, Qatar
| | - Abtin Alvand
- Nuffield Department of Orthopaedics, Rheumatology & Musculoskeletal Sciences, University of Oxford, Oxford, UK
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Moewis P, Duda GN, Trepczynski A, Krahl L, Boese CK, Hommel H. Retention of Posterior Cruciate Ligament Alone May Not Achieve Physiological Knee Joint Kinematics After Total Knee Arthroplasty: A Retrospective Study. J Bone Joint Surg Am 2021; 103:146-154. [PMID: 33060427 DOI: 10.2106/jbjs.20.00024] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND The apparently physiological kinematics of the bicruciate-stabilized total knee arthroplasty (BCS TKA) systems have been attributed to the anterior and posterior post-cam mechanism. Although comparisons between TKA designs with either a retained or a sacrificed cruciate ligament have been conducted, we are not aware of any analyses of 2 implants with identical bearing geometry but different cruciate-ligament strategies under equal loading conditions. Knowledge about the kinematic effect of the different cruciate ligament strategies would potentially be valuable to facilitate preoperative planning and decision-making with regard to selecting the most appropriate implant for a patient. METHODS This retrospective study included 20 patients: 10 treated with a BCS and 10 treated with a cruciate retaining (CR) TKA. Fluoroscopic analyses during high-flexion activities (unloaded flexion-extension and loaded lunge) were conducted at 24 months postsurgery. All patients completed the Knee Society Score, Forgotten Joint Score, and High-Flexion Knee Score questionnaires preoperatively and postoperatively. RESULTS The BCS cohort showed greater femoral lateral rollback as well as a medial pivot in both activities. In contrast, the CR cohort showed a significant increase in anterior translation on the medial compartment as well as almost absent femoral lateral rollback. Higher clinical scores were observed in the BCS cohort. CONCLUSIONS At 24 months postsurgery, despite equal bearing geometry, retention of the posterior cruciate ligament in the CR cohort apparently was insufficient to reduce anterior shift. The BCS cohort showed expected knee joint kinematics; however, the kinematics in this cohort could eventually benefit from a smooth transition between the interchanging surfaces. Further investigation should be focused on the surgical technique and its interaction with the TKA design. LEVEL OF EVIDENCE Therapeutic Level III. See Instructions for Authors for a complete description of levels of evidence.
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Affiliation(s)
- Philippe Moewis
- Julius Wolff Institute and Center for Musculoskeletal Surgery, Charité-Universitätsmedizin Berlin, Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Georg N Duda
- Julius Wolff Institute and Center for Musculoskeletal Surgery, Charité-Universitätsmedizin Berlin, Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Adam Trepczynski
- Julius Wolff Institute and Center for Musculoskeletal Surgery, Charité-Universitätsmedizin Berlin, Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Leonie Krahl
- Julius Wolff Institute and Center for Musculoskeletal Surgery, Charité-Universitätsmedizin Berlin, Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Christoph K Boese
- Department of Orthopedics and Trauma Surgery, University Hospital of Cologne, Cologne, Germany.,Smith & Nephew GmbH, Hamburg, Germany
| | - Hagen Hommel
- Krankenhaus Märkisch-Oderland GmBH, Wriezen, Germany.,Medizinischen Hochschule Brandenburg (MHB) Theodor Fontane, Neuruppin, Germany
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Killen CJ, Murphy MP, Hopkinson WJ, Harrington MA, Adams WH, Rees HW. Minimum twelve-year follow-up of fixed- vs mobile-bearing total knee arthroplasty: Double blinded randomized trial. J Clin Orthop Trauma 2020; 11:154-159. [PMID: 32002005 PMCID: PMC6985168 DOI: 10.1016/j.jcot.2019.03.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Revised: 03/22/2019] [Accepted: 03/26/2019] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND Total knee arthroplasty (TKA) with fixed-bearing (FB) implants have demonstrated impressive functional results and survival rates. Meanwhile, rotating-platform (RP) constructs have biomechanically shown to reduce polyethylene wear, lower the risk of component loosening, and better replicate anatomic knee motion. There is growing question of the clinical impact these design changes have long-term.Questions/purposes: The aim of this double-blinded prospective randomized trial was to compare function and implant survival in patients who received either FB or RP press-fit condylar Sigma (PFC Sigma, DePuy, Warsaw, IN) total knee replacements at a minimum follow-up of twelve years. PATIENTS AND METHODS Patient reported outcome measures used included the functional Knee Society Score, Western Ontario and McMaster University Osteoarthritis Index (WOMAC) scores, Medical Outcomes Short Form-36 (SF-36) score, and satisfaction assessment on a four-point Likert scale. The data was collected from times preoperative, two-years, and final encounter (mean 13.95 years). A total of 28 RP and 19 FB knees (58.8%) were analyzed at the final follow-up. RESULTS Among all patients, KSS and WOMAC scores statistically improved from pre-op to 2-year, while KSS statistically worsened from 2-year to final follow-up. The RP group averaged better follow-up scores in all assessments at the final follow-up with exception of overall satisfaction. There was no statistically significant difference in the functional Knee Society Score, Short Form-36, WOMAC scores, patient satisfaction or implant survival between the two groups at any measured period. CONCLUSIONS The use of a fixed-bearing or rotating-platform design does not convey significant superiority in terms of function or implant longevity at a minimum twelve years after total knee arthroplasty. LEVEL OF EVIDENCE Level I, Experimental study, randomized controlled trial (RCT).
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Affiliation(s)
- Cameron J. Killen
- Loyola University Medical Center, Department of Orthopaedic Surgery and Rehabilitation, 2160 S. First Avenue, Maguire Suite 1700, Maywood, IL, 60153, USA
| | - Michael P. Murphy
- Loyola University Medical Center, Department of Orthopaedic Surgery and Rehabilitation, 2160 S. First Avenue, Maguire Suite 1700, Maywood, IL, 60153, USA,Corresponding author.
| | - William J. Hopkinson
- Loyola University Medical Center, Department of Orthopaedic Surgery and Rehabilitation, 2160 S. First Avenue, Maguire Suite 1700, Maywood, IL, 60153, USA
| | - Melvyn A. Harrington
- Baylor College of Medicine, Department of Orthopaedic Surgery and Rehabilitation, 1 Baylor Plaza, Houston, TX, 77030, USA
| | - William H. Adams
- Loyola University Medical Center, Department of Clinical Research, 2160 S. First Avenue, Maguire Suite 1700, Maywood, IL, 60153, USA
| | - Harold W. Rees
- Loyola University Medical Center, Department of Orthopaedic Surgery and Rehabilitation, 2160 S. First Avenue, Maguire Suite 1700, Maywood, IL, 60153, USA
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Spontaneous 180-Degree Rotatory Dislocation of Rotating-Platform Total Knee Arthroplasty. Case Rep Orthop 2019; 2019:2038983. [PMID: 31637073 PMCID: PMC6766126 DOI: 10.1155/2019/2038983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Accepted: 09/03/2019] [Indexed: 11/29/2022] Open
Abstract
Rotating-bearing total knee arthroplasty has been theorized to have some advantages in the kinematics and wear characteristics of total knee arthroplasty. A rare complication of rotating-bearing total knee arthroplasty is rotary dislocation, spinout, of the polyethylene component. When these dislocations occur, they typically result in a 90-degree dislocation in respect to the axial axis of the knee. This case is unique in that it presents a complete 180-degree polyethylene dislocation without trauma.
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10
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Weight Bearing Activities change the Pivot Position after Total Knee Arthroplasty. Sci Rep 2019; 9:9148. [PMID: 31235890 PMCID: PMC6591446 DOI: 10.1038/s41598-019-45694-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 06/10/2019] [Indexed: 01/16/2023] Open
Abstract
The knee joint center of rotation is altered in the absence of the anterior cruciate ligament, which leads to substantially higher variance in kinematic patterns. To overcome this, total knee arthroplasty (TKA) designs with a high congruency in the lateral compartment have been proposed. The purpose of this study was to analyze the influence of a lateral pivot TKA-design on in-vivo knee joint kinematics. Tibiofemoral motion was retrospectively addressed in 10 patients during unloaded flexion-extension and loaded lunge using single plane fluoroscopy. During the unloaded flexion-extension movement, the lateral condyle remained almost stationary with little rollback at maximum flexion. The medial condyle exhibited anterior translation during the whole flexion cycle. During the loaded lunge movement, a higher degree of rollback compared to the unloaded activity was observed on the lateral condyle, whereas the medial condyle remained almost stationary. The results showed a clear lateral pivot during the unloaded activity, reflective of the implant’s geometric characteristics, and a change to a medial pivot and a higher lateral rollback during the weight-bearing conditions, revealing the impact of load and muscle force. It remains unclear if the kinematics with a lateral TKA design could be considered as physiological, due to the limited knowledge available on native knee joint kinematics.
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Powell AJ, Crua E, Chong BC, Gordon R, McAuslan A, Pitto RP, Clatworthy MG. A randomized prospective study comparing mobile-bearing against fixed-bearing PFC Sigma cruciate-retaining total knee arthroplasties with ten-year minimum follow-up. Bone Joint J 2018; 100-B:1336-1344. [PMID: 30295539 DOI: 10.1302/0301-620x.100b10.bjj-2017-1450.r1] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
AIMS This study compares the PFC total knee arthroplasty (TKA) system in a prospective randomized control trial (RCT) of the mobile-bearing rotating-platform (RP) TKA against the fixed-bearing (FB) TKA. This is the largest RCT with the longest follow-up where cruciate-retaining PFC total knee arthroplasties are compared in a non-bilateral TKA study. PATIENTS AND METHODS A total of 167 patients (190 knees with 23 bilateral cases), were recruited prospectively and randomly assigned, with 91 knees receiving the RP and 99 knees receiving FB. The mean age was 65.5 years (48 to 82), the mean body mass index (BMI) was 29.7 kg/m2 (20 to 52) and 73 patients were female. The Knee Society Score (KSS), Knee Society Functional Score (KSFS), Oxford Knee Score (OKS), Western Ontario and McMaster Universities Arthritis Index (WOMAC), and 12-Item Short-Form Health Survey Physical and Mental Component Scores (SF-12 PCS, SF-12 MCS) were gathered and recorded preoperatively, at five-years' follow-up, and at ten years' follow-up. Additionally, Knee Injury and Osteoarthritis Outcome Scores (KOOS) were collected at five- and ten-year follow-ups. The prevalence of radiolucent lines (RL) on radiographs and implant survival were recorded at five- and ten-year follow-ups. RESULTS At the ten-year follow-up, the RP group (n = 39) had a statistically significant superior score in the OKS (p = 0.001), WOMAC (p = 0.023), SF-12 PCS (p = 0.019), KOOS Activities of Daily Living (ADL) (p = 0.010), and KOOS Sport and Recreation (Sport/Rec) (p = 0.006) compared with the FB group (n = 46). The OKS, SF-12 PCS, and KOOS Sport/Rec at ten years had mean scores above the minimal clinically important difference (MCID) threshold. There was no significant difference in prevalence of radiolucency between groups at five-years' follow-up (p = 0.449), nor at ten-years' follow-up (p = 0.08). Implant survival rate at 14 years postoperative was 95.2 (95% CI 90.7 to 99.8) and 94.7 (95% CI 86.8 to 100.0) for the RP and FB TKAs, respectively. CONCLUSION At ten-year follow-up, the mobile-bearing knee joint arthroplasty had statistically and clinically relevant superior OKS, SF-12 PCS, and KOOS (Sport/Rec) than the fixed-bearing platform. No difference was seen in prevalence of radiolucent lines. There was a greater than 94% implant survival rate for both cohorts at 14 years. Cite this article: Bone Joint J 2018;100-B:1336-44.
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Affiliation(s)
- A J Powell
- Department of Trauma and Orthopaedic Surgery, Middlemore and Ascot Hospitals, Auckland, New Zealand
| | - E Crua
- Department of Trauma and Orthopaedic Surgery, Ascot Hospital, Auckland, New Zealand
| | - B C Chong
- University of Auckland, School of Medicine, Auckland, New Zealand
| | - R Gordon
- Department of Trauma and Orthopaedic Surgery, Middlemore and Ascot Hospitals, Auckland, New Zealand
| | - A McAuslan
- Department of Trauma and Orthopaedic Surgery, Middlemore and Ascot Hospitals, Auckland, New Zealand
| | - R P Pitto
- Department of Trauma and Orthopaedic Surgery, Middlemore and Ascot Hospitals, Auckland, New Zealand
| | - M G Clatworthy
- Department of Trauma and Orthopaedic Surgery, Middlemore and Ascot Hospitals, Auckland, New Zealand
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Pfitzner T, Moewis P, Stein P, Boeth H, Trepczynski A, von Roth P, Duda GN. Modifications of femoral component design in multi-radius total knee arthroplasty lead to higher lateral posterior femoro-tibial translation. Knee Surg Sports Traumatol Arthrosc 2018; 26:1645-1655. [PMID: 28656456 DOI: 10.1007/s00167-017-4622-7] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Accepted: 06/19/2017] [Indexed: 12/14/2022]
Abstract
PURPOSE As the aims of changes in total knee arthroplasty (TKA) designs are to reinstate more natural kinematics, the current study evaluated the in vivo kinematics in patients who underwent a cruciate retaining gradually changing femoral radius ("G-CURVE") against a cruciate retaining conventional changing femoral radius ("J-CURVE") geometry TKA design. The hypothesis of the study is that the G-CURVE design would allow a substantial increase in the femoral rollback compared to the J-CURVE design. METHODS Retrospective study design. Thirty patients were included (G-CURVE, n = 20; J-CURVE, n = 10). Single-plane fluoroscopic analysis and marker-based motion capture gait analysis was performed to analyse dynamic tibiofemoral motion during weight-bearing and unloaded activities at 24 month after index surgery. RESULTS The analysis of the medial and lateral points on the tibia plateau during the unloaded flexion-extension and the weight-bearing lunge activities revealed a significant difference in femoral rollback in G-CURVE TKA above 60° (p = 0.001) and 30° (p = 0.02) of knee flexion, respectively. Moreover, the lateral condyle of the G-CURVE showed a higher extent of femoral rollback while the lateral condyle of the J-CURVE rolled forward. CONCLUSION At 2 years post-operative, the G-CURVE TKA showed significant differences in femoro-tibial translation in comparison with the J-CURVE system, in vivo. The G-CURVE resulted in an increased lateral rollback and simultaneously in an elimination of the paradoxical medial roll-forward present in the J-CURVE design. Moreover, knee kinematics analysis showed significant differences between unloaded and weight-bearing conditions revealing the impact of load and muscle force. The analysis conducted in this study contributes to further understand the principal movement characteristics in widely used older designs in comparison with recently developed concepts to get a better overview on their potential benefits on in vivo kinematics. LEVEL OF EVIDENCE III.
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Affiliation(s)
- Tilman Pfitzner
- Center for Muskuloskeletal Surgery, Orthopaedic Department, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Philippe Moewis
- Julius Wolff Institute, Charité - Universitätsmedizin Berlin, Augustenburger Platz 1, 13353, Berlin, Germany.
| | - Patrick Stein
- Center for Muskuloskeletal Surgery, Orthopaedic Department, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Heide Boeth
- Julius Wolff Institute, Charité - Universitätsmedizin Berlin, Augustenburger Platz 1, 13353, Berlin, Germany
| | - Adam Trepczynski
- Julius Wolff Institute, Charité - Universitätsmedizin Berlin, Augustenburger Platz 1, 13353, Berlin, Germany
| | - Philipp von Roth
- Center for Muskuloskeletal Surgery, Orthopaedic Department, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Georg N Duda
- Julius Wolff Institute, Charité - Universitätsmedizin Berlin, Augustenburger Platz 1, 13353, Berlin, Germany
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13
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Heesterbeek PJC, van Houten AH, Klenk JS, Eijer H, Christen B, Wymenga AB, Schuster AJ. Superior long-term survival for fixed bearing compared with mobile bearing in ligament-balanced total knee arthroplasty. Knee Surg Sports Traumatol Arthrosc 2018; 26:1524-1531. [PMID: 28389879 DOI: 10.1007/s00167-017-4542-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Accepted: 04/04/2017] [Indexed: 11/25/2022]
Abstract
PURPOSE Only few long-term data on ligament-balanced cruciate-retaining total knee arthroplasty (CR TKA) are currently available. Either a mobile- or fixed-bearing insert can be chosen, which showed good mid-term outcome and few complications and revisions. This multi-centre retrospective cross-sectional cohort study investigated the 12-year results of primary TKA using a balancing gap technique and compared survival and clinical outcome between fixed and mobile inserts. METHODS In this retrospective cross-sectional cohort study, 557 cases of three clinics (2 Swiss, 1 Dutch) operated between 1998 and 2003 with the first series of a TKA implanted with a balanced gap technique (433 (77.7%) fixed, 124 (22.3%) mobile (anterior-posterior gliding (7-9 mm) and rotational (15°) degrees of freedom) inserts) were included for survival analysis (Kaplan-Meier, by insert type). At the 12-year follow-up (FU) examination of 189 cases, range of motion, knee society score (KSS), numeric rating scale (NRS) for pain and satisfaction were determined and radiographs were evaluated by median tests, by insert type. RESULTS Of 521 cases available for analysis, 28 (5.4%; 11 fixed, 17 mobile bearing) were revised. Mean cumulative survival after 12.4 years was 97.0% (95% CI 94.7-98.4) for fixed bearings and 85.4% (95% CI 77.5-90.7) after 12.2 years for mobile bearings, p < 0.0001. Patients' mean age at 11.0 years FU (n = 189) was 78.0 (range 54.5-97.3) years. Mean total KSS was 157.8 (24-200) points, and mean passive flexion was 114° (45-150); no clinical score differed significantly between fixed and mobile bearings. CONCLUSION This study showed a superior survival for fixed bearing compared with mobile bearing in a CR TKA using a ligament-balanced technique after more than 12 years. Clinical outcomes are excellent to good after long-term follow-up, and similar for fixed and mobile bearing. LEVEL OF EVIDENCE Therapeutic studies-retrospective cohort study, Level III.
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Affiliation(s)
| | | | - J S Klenk
- Orthopädische Klinik orthosiloah Bern-Gümligen, Bern, Switzerland
| | - H Eijer
- Regionalspital Emmental AG, Burgdorf, Switzerland
| | - B Christen
- Orthopädische Klinik Bern, Bern, Switzerland
| | - A B Wymenga
- Sint Maartenskliniek, Nijmegen, The Netherlands
| | - A J Schuster
- Orthopädische Klinik orthosiloah Bern-Gümligen, Bern, Switzerland
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14
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Magone K, Kemker BP, Pilipenko N, O'Connor E, Walter N, Atkinson T. The New Surgical Technique for Improving Total Knee and Hip Arthroplasty Outcomes: Patient Selection. J Arthroplasty 2017; 32:2070-2076. [PMID: 28343822 DOI: 10.1016/j.arth.2017.02.034] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Revised: 02/07/2017] [Accepted: 02/14/2017] [Indexed: 02/01/2023] Open
Abstract
BACKGROUND Inclusion of patient satisfaction scores in setting reimbursements has been suggested by health care policy makers to contain cost and improve outcomes. The Short Form 36 Health Survey (SF-36) score provides a health-related quality of life (HRQoL) measure of arthroplasty outcome. Although previous work identified factors that influence this score for hip and knee arthroplasty patients, they did not focus on how a surgeon might use this information in a clinical setting. The present study examined whether relatively simple criteria might identify patients more likely to experience minimal HRQoL improvement. METHODS "Improvements" in SF-36 composite physical scores and subscales were calculated from the difference between initial (preoperative) and SF-36 scores at 1 year. The rates of achieving a clinically significant improvement were compared between patient groups. RESULTS After knee arthroplasty, women and younger patients achieved a clinically significant improvement in physical function more frequently than men and older patients (P = .04 and .02, respectively). The largest differences in improvement occurred between the diabetic and nondiabetic groups (P = .001), where the diabetic patients with ≥2 additional comorbidities demonstrated the lowest rate of achieving a clinically significant improvement in physical function and bodily pain. In comparison, in hip patients only age had significant influence on gains in physical function, but this did not alter the rate at which patients achieved a clinically significant improvement. CONCLUSION These data indicate simple screening criteria can identify patients where arthroplasty might provide marginal HRQoL improvement. They suggest HRQoL-based reimbursement incentives will favor practices with younger, healthier patient populations.
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Affiliation(s)
- Kevin Magone
- Department of Orthopaedic Surgery, McLaren Flint, Flint, Michigan
| | - Bernard P Kemker
- Department of Orthopaedic Surgery, McLaren Flint, Flint, Michigan
| | - Nataliya Pilipenko
- Department of Behavioral Medicine Education/Family Medicine, McLaren Flint, Flint, Michigan
| | - Erin O'Connor
- Department of Behavioral Medicine Education/Family Medicine, McLaren Flint, Flint, Michigan
| | - Norman Walter
- Department of Orthopaedic Surgery, McLaren Flint, Flint, Michigan; Department of Mechanical Engineering, Kettering University, Flint, Michigan
| | - Theresa Atkinson
- Department of Orthopaedic Surgery, McLaren Flint, Flint, Michigan; Department of Mechanical Engineering, Kettering University, Flint, Michigan
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15
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No differences between fixed- and mobile-bearing total knee arthroplasty. Knee Surg Sports Traumatol Arthrosc 2017; 25:1757-1777. [PMID: 27324479 DOI: 10.1007/s00167-016-4195-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Accepted: 06/07/2016] [Indexed: 12/20/2022]
Abstract
PURPOSE For years, numerous studies have been performed to determine whether mobile-bearing total knee arthroplasty (MB-TKA) or fixed-bearing total knee arthroplasty (FB-TKA) is the preferential design in total knee arthroplasty. Reviews and meta-analyses on this subject have focused on a relatively small number of randomised controlled trials, possibly missing important results of smaller studies. The goal of this review was to provide a comprehensive overview of all literature comparing MB-TKA and FB-TKA in the treatment of osteoarthritis of the knee. METHODS An extensive literature search was performed in the PubMed database. All studies that compared MB-TKA with FB-TKA and looked at one of four theorised advantages (insert wear, signs of loosening, survival rate of the prosthesis and clinical outcome) were included. RESULTS The initial search yielded 258 articles, of which 127 were included after the first screening. The included studies consisted of 9 meta-analyses, 3 systematic reviews, 48 RCT's, 44 comparative studies, 10 reviews and 13 studies that examined patients who received bilateral TKA (one MB-TKA and one FB-TKA). Combining the results of all studies showed that almost all studies found no difference between MB-TKA and FB-TKA. CONCLUSIONS Even when examining all different types of studies on MB-TKA and FB-TKA, the results of this review showed no difference in insert wear, risk of loosening, survivorship or clinical outcome. In daily practice, the choice between MB-TKA and FB-TKA should be based on the experience and judgment of the surgeon, since no clear differences are observed in the scientific literature. LEVEL OF EVIDENCE III.
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16
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Martin JR, Beahrs TR, Fehring KA, Trousdale RT. Rotating platform versus fixed bearing total knee arthroplasty at mid-term follow-up. Knee 2016; 23:1055-1058. [PMID: 27815014 DOI: 10.1016/j.knee.2016.06.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Revised: 04/26/2016] [Accepted: 06/12/2016] [Indexed: 02/02/2023]
Abstract
BACKGROUND Rotating platform posterior stabilized (RP) total knee arthroplasty (TKA) was initially developed in part to decrease polyethylene wear and to improve patellar tracking. There have been limited studies evaluating the longevity and causes of reoperation or revision for this implant. The following study compares mid-term survival rates and causes for reoperation between fixed bearing (FB) TKAs. METHODS We identified 11,416 patients who underwent a primary posterior stabilized TKA between 2001 and 2013. This group was stratified to include patients with a RP (n=926) and FB (n=10,490) TKA design. Kaplan-Meier survival rates for each complication that led to reoperation were determined at five- and 10-years. Univariate hazard ratios were determined for the most common causes for reoperation and overall implant survival rates. A multivariate analysis was performed to account for the age, gender and preoperative diagnosis discrepancy between groups. RESULTS The reoperation data demonstrated statistically increased all-cause reoperation rate (p=<0.001) and reoperation rate for stiffness in the RP group (p=0.001). After adjusting for demographic variables we noted no statistically significant differences in reoperation rate and reoperation for stiffness. Additionally, a statistically significant decrease was noted in all-cause revision (p=0.024) and revision for aseptic loosening or osteolysis in the RP group (p=0.029). CONCLUSION After adjusting for patient demographic differences, we noted a statistically significant decrease in the overall revision and revision for aseptic loosening or osteolysis rates in the RP group.
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Affiliation(s)
- J Ryan Martin
- Mayo Clinic, Department of Orthopedic Surgery, 200 First Street SW, Rochester, MN 55905, United States.
| | - Taylor R Beahrs
- Mayo Clinic, Department of Orthopedic Surgery, 200 First Street SW, Rochester, MN 55905, United States.
| | - Keith A Fehring
- Mayo Clinic, Department of Orthopedic Surgery, 200 First Street SW, Rochester, MN 55905, United States.
| | - Robert T Trousdale
- Mayo Clinic, Department of Orthopedic Surgery, 200 First Street SW, Rochester, MN 55905, United States.
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17
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Kim SH, Lim JW, Ko YB, Song MG, Lee HJ. Comparison of ultra-congruent mobile- and fixed-bearing navigation-assisted total knee arthroplasty with minimum 5-year follow-up. Knee Surg Sports Traumatol Arthrosc 2016; 24:3466-3473. [PMID: 27145772 DOI: 10.1007/s00167-016-4147-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Accepted: 04/20/2016] [Indexed: 11/28/2022]
Abstract
PURPOSE The purpose of this study was to compare the midterm outcomes between fixed and mobile ultra-congruent (UC) bearings in total knee arthroplasty (TKA). METHODS This is a retrospective matched-pairs case-control study of patients who underwent primary navigation-assisted TKA with a minimum 5-year follow-up. A total of 182 cases involved the fixed UC bearing system as Group 1 and 101 cases involved mobile UC bearing system group as Group 2. After 1:1 matching, 73 knees in each group were enrolled. Clinical and radiographic outcomes were evaluated. RESULTS The overall survival was 143 of 146 cases (97.9 %) at final follow-up, and 72 of 73 cases (96.3 %) in Group 1 and 71 of 73 cases (95.8 %) in Group 2 at final follow-up based on an endpoint of revision surgery. The reasons of revision TKA were periprosthetic fracture in Group 1, infection and bearing dislocation in Group 2. There was no statistical difference in Hospital for Special Surgery (HSS) scores, Knee Society Scores (KSS), WOMAC index score evaluations between groups. CONCLUSIONS This study demonstrated that the fixed-bearing UC prosthesis could provide satisfactory performance compared with that of the mobile-bearing UC prosthesis with minimum 5-year follow-up. The fixed-bearing UC prosthesis could be considered in navigation-assisted TKA with theoretical advantages of UC design. LEVEL OF EVIDENCE IV.
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Affiliation(s)
- Seong Hwan Kim
- Department of Orthopaedic Surgery, Chung-Ang University College of Medicine, 102 Heukseok-ro, Dongjak-ku, Seoul, 156-755, South Korea
| | - Jung-Won Lim
- Department of Orthopaedic Surgery, Chung-Ang University College of Medicine, 102 Heukseok-ro, Dongjak-ku, Seoul, 156-755, South Korea
| | - Young-Bong Ko
- Department of Orthopaedic Surgery, Chung-Ang University College of Medicine, 102 Heukseok-ro, Dongjak-ku, Seoul, 156-755, South Korea
| | - Min-Gu Song
- Department of Orthopaedic Surgery, Chung-Ang University College of Medicine, 102 Heukseok-ro, Dongjak-ku, Seoul, 156-755, South Korea
| | - Han-Jun Lee
- Department of Orthopaedic Surgery, Chung-Ang University College of Medicine, 102 Heukseok-ro, Dongjak-ku, Seoul, 156-755, South Korea.
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18
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Thienpont E, Zorman D. Higher forgotten joint score for fixed-bearing than for mobile-bearing total knee arthroplasty. Knee Surg Sports Traumatol Arthrosc 2016; 24:2641-5. [PMID: 26037546 DOI: 10.1007/s00167-015-3663-z] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2015] [Accepted: 05/27/2015] [Indexed: 10/23/2022]
Abstract
PURPOSE To compare the postoperative subjective outcome for fixed- and mobile-bearing total knee arthroplasty (TKA) by using the forgotten joint score (FJS-12), a new patient-reported outcome score of 12 questions evaluating the potential of a patient to forget about his operated joint. The hypothesis of this study was that a mobile-bearing TKA would have a higher level of forgotten joint than a fixed-bearing model of the same design. METHODS A retrospective cohort study was conducted in 100 patients who underwent TKA at least 1 year [mean (SD) 18 (5) months] before with either a fixed-bearing (N = 50) or a mobile-bearing (N = 50) TKA from the same implant family. Clinical outcome was evaluated with the knee society score and patient-reported outcome with the forgotten joint score. RESULTS No difference was observed for demographics in between both study groups. The mean (SD) postoperative FJS-12 for the fixed-bearing TKA was 71 (28) compared to a mean (SD) of 56.5 (30) for the mobile-bearing TKA. DISCUSSION The clinical relevance of the present retrospective study is that it shows for the first time a significant difference between fixed- and mobile-bearing TKA by using a new patient-reported outcome score. The hypothesis that mobile-bearing TKA would have a higher degree of forgotten joint than a fixed-bearing TKA could not be confirmed. A level I prospective study should be set up to objectivise these findings. LEVEL OF EVIDENCE IV.
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Affiliation(s)
- E Thienpont
- Cliniques Universitaires Saint Luc-UCL, Av. Hippocrate 10, 1200, Brussels, Belgium.
| | - D Zorman
- CHU-Tivoli, La Louvière, Belgium
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19
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Ulivi M, Orlandini L, Meroni V, Consonni O, Sansone V. Survivorship at minimum 10-year follow-up of a rotating-platform, mobile-bearing, posterior-stabilised total knee arthroplasty. Knee Surg Sports Traumatol Arthrosc 2015; 23:1669-75. [PMID: 24938395 DOI: 10.1007/s00167-014-3118-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Accepted: 06/03/2014] [Indexed: 11/30/2022]
Abstract
PURPOSE To evaluate prospectively the long-term clinical and radiographic results and survivorship of a rotating-platform, posterior-stabilised knee prosthesis at minimum 10 years (mean 11.5 ± 1.41 years), and to test the hypothesis that this design would have a mechanical survivorship greater than 95%. METHODS Between 2000 and 2002, 160 consecutive patients (166 knees) underwent total knee arthroplasty using a rotating-platform, posterior-stabilised prosthesis, and clinical and radiographic follow-up data were gathered prospectively. RESULTS One hundred and seven patients (112 knees) were available for final follow-up. Five patients (3%) had undergone revision surgery, giving a Kaplan-Meier survival rate of 96.6% for all causes of failure. No spin-out of the polyethylene insert was observed. The mean visual analogue scale, Knee Society and Oxford Knee Scores showed statistically significant improvements (p < 0.001). On radiographs, two cases (2.4%) had radiolucent lines >2 mm, and no patient had osteolysis. CONCLUSIONS The absence of osteolysis at minimum 10 years seems to support our hypothesis that this design may be able to reduce peri-prosthetic bone resorption in the long term. The survivorship was greater than 95% and is comparable to the best results reported for this type of knee prosthesis in the literature. The clinical scores are reasonable, given the presence of various disabling concomitant pathologies and the relatively advanced mean age of the study population. This study is clinically relevant because it adds valuable information to the limited data regarding the long-term survivorship and performance of rotating-platform knee prostheses and, more specifically, of a single knee design. LEVEL OF EVIDENCE IV.
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Affiliation(s)
- Michele Ulivi
- Istituto Ortopedico Galeazzi IRCCS, Via R Galeazzi 4, 20161, Milan, Italy
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20
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Marques CJ, Daniel S, Sufi-Siavach A, Lampe F. No differences in clinical outcomes between fixed- and mobile-bearing computer-assisted total knee arthroplasties and no correlations between navigation data and clinical scores. Knee Surg Sports Traumatol Arthrosc 2015; 23:1660-8. [PMID: 24929659 PMCID: PMC4439432 DOI: 10.1007/s00167-014-3127-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Accepted: 06/04/2014] [Indexed: 01/14/2023]
Abstract
PURPOSE The theoretical advantages of mobile-bearing (MB) designs over the conventional fixed bearings (FBs) for total knee arthroplasty (TKA) have not been proved yet through clinical studies. The aim of the study was to test whether the MB design has advantages in terms of better clinical outcomes when compared to FB. Furthermore, the relationships between intra-operative obtained implant positioning data and the clinical scores were analysed. METHODS A total of 99 patients were randomized into the FB or the MB group. All patients received the same posterior cruciate retaining implants and were operated with the use of a computer-assisted navigation system. The clinical outcomes of both groups were compared pre-operatively, at 1 year, and at a mean follow-up time of 4 years after surgery. RESULTS The MB implants showed no advantages over the FB when comparing the Knee Society Scores, the Oxford Score, the range of movement (ROM) and pain intensity of the patients in both groups at 1 and 4 years after surgery. There were no relationships between the computer navigation data and the clinical scores. CONCLUSIONS In view of the 4-year results, there is no evidence to support the recommendation of one design over the other in terms of better clinical outcome scores, higher ROM or lower pain rates. Long-term follow-up results may be necessary, including survival rates. Further research comparing different TKA designs should also include standardized performance-based tests. LEVEL OF EVIDENCE Prospective study (Randomized controlled trial with adequate statistical power to detect differences), Level I.
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Affiliation(s)
- Carlos J. Marques
- Research Center of the Orthopedic and Joint Replacement Department, Schoen Klinik Hamburg Eilbek, Dehnhaide 120, 22081 Hamburg, Germany
| | - Sandra Daniel
- Orthopedic and Joint Replacement Department, Schoen Klinik Hamburg Eilbek, Dehnhaide 120, 22081 Hamburg, Germany
| | - Anusch Sufi-Siavach
- Orthopedic and Joint Replacement Department, Schoen Klinik Hamburg Eilbek, Dehnhaide 120, 22081 Hamburg, Germany
| | - Frank Lampe
- Research Center of the Orthopedic and Joint Replacement Department, Schoen Klinik Hamburg Eilbek, Dehnhaide 120, 22081 Hamburg, Germany ,Faculty of Life Sciences, Hamburg University of Applied Sciences, Lohbrügger Kirchstraße 65, 21033 Hamburg, Germany
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21
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Namba R, Graves S, Robertsson O, Furnes O, Stea S, Puig-Verdié L, Hoeffel D, Cafri G, Paxton E, Sedrakyan A. International comparative evaluation of knee replacement with fixed or mobile non-posterior-stabilized implants. J Bone Joint Surg Am 2014; 96 Suppl 1:52-8. [PMID: 25520419 PMCID: PMC4271422 DOI: 10.2106/jbjs.n.00466] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND Mobile-bearing total knee prostheses were designed to reduce wear and improve implant survivorship following total knee arthroplasty. However, the benefit of mobile-bearing total knee arthroplasty remains unproven. Both mobile-bearing and fixed-bearing total knee arthroplasty implants are available in posterior-stabilized and non-posterior-stabilized designs. With the latter, the implant does not recreate the function of the posterior cruciate ligament (PCL) with a posterior-stabilizing cam mechanism. The purpose of the present study was to compare mobile-bearing, non-posterior-stabilized devices with fixed-bearing, non-posterior-stabilized devices used in total knee arthroplasty through a novel multinational study design. METHODS Through the use of a distributed health data network, primary total knee arthroplasties performed for osteoarthritis from 2001 to 2010 were identified from six national and regional total joint arthroplasty registries. Multivariate meta-analysis was performed with use of linear mixed models, with the primary outcome of interest being revision for any reason. Survival probabilities and their standard errors were extracted from each registry for each unique combination of the covariates. RESULTS A total of 319,616 patients (60% female) underwent non-posterior-stabilized total knee arthroplasty. A fixed-bearing, non-posterior-stabilized design was used in 258,190 (81%) of the knees and a mobile-bearing, non-posterior-stabilized design in 61,426 (19%) of the knees. Sixty-nine percent of the patients who received a fixed-bearing implant were over sixty-five years of age, compared with 63% of those who received a mobile-bearing implant. Mobile-bearing designs had a higher risk of revision, with a hazard ratio of 1.43 (95% confidence interval, 1.36 to 1.51; p < 0.001). CONCLUSIONS Previous comparisons of mobile-bearing and fixed-bearing total knee arthroplasty outcomes have been inconclusive. The current study utilized an advanced, harmonized distributed analysis of six national and regional joint-replacement registries. To our knowledge, it is the largest analysis of mobile-bearing total knee arthroplasty to date. Mobile-bearing, non-posterior-stabilized designs presented a greater risk of failure than was found for fixed-bearing, non-posterior-stabilized designs. Caution should be used in the selection of the mobile-bearing non-posterior-stabilized design for total knee replacement.
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Affiliation(s)
| | - Stephen Graves
- Australian Orthopaedic Association National Joint Replacement Registry, Discipline of Public Health, MDP DX 650 511, University of Adelaide, Adelaide, SA 5005, Australia
| | - Otto Robertsson
- The Swedish Knee Arthroplasty Register, Department of Orthopedics, Clinical Sciences, SUS/Lund University Hospital, 221 85 Lund, Sweden
| | - Ove Furnes
- The Norwegian Arthroplasty Register, Department of Orthopaedic Surgery, Haukeland University Hospital, Mollendalsbakken 11, N-5021 Bergen, Norway
| | - Susanna Stea
- Register of the Orthopaedic Prosthetic Implants (RIPO), c/o Medical Technology Laboratory, Istituto Ortopedico Rizzoli, Via di Barbiano 1/10, 40136 Bologna, Italy
| | - Lluis Puig-Verdié
- Department of Orthopedic Surgery and Traumatology, Hospital del Mar, Parc de Salud MAR, Passeig Maritim 25-27, 08003 Barcelona, Spain
| | - Daniel Hoeffel
- Summit Orthopedics, 2090 Woodwinds Drive, St. Paul, MN 55125
| | - Guy Cafri
- Surgical Outcomes & Analysis Department, Kaiser Permanente, 8954 Rio San Diego Drive, Suite 406, San Diego, CA 92108
| | - Elizabeth Paxton
- Surgical Outcomes & Analysis Department, Kaiser Permanente, 8954 Rio San Diego Drive, Suite 406, San Diego, CA 92108
| | - Art Sedrakyan
- Weill Cornell Medical College, 402 East 67th Street, New York, NY 10065
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22
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Solarino G, Spinarelli A, Carrozzo M, Piazzolla A, Vicenti G, Moretti B. Long-term outcome of low contact stress total knee arthroplasty with different mobile bearing designs. JOINTS 2014; 2:109-14. [PMID: 25606553 DOI: 10.11138/jts/2014.2.3.109] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
PURPOSE to evaluate the differences in clinical outcome and survivorship of three different mobile bearings for total knee arthroplasty. METHODS a retrospective study was conducted in 60 patients (53 females, 7 males, mean age: 68 years and 5 months) each submitted to total knee replacement using one of the three different mobile bearings of the LCS system (Depuy Johnson & Johnson, Warsaw, IN). The diagnosis was knee osteoarthritis in 57 cases and rheumatoid arthritis in three cases. Three different groups of 20 cases each were identified: total knee arthroplasties with mobile menisci (group 1); total knee arthroplasties with the rotating platform (group 2); and total knee arthroplasties with the anteroposterior glide platform (group 3). As regards the component fixation, 33 implants were cementless, three were cemented, and in 24 only the tibial component was cemented. The patella was not replaced. RESULTS although the duration of follow-up differed between the three groups, the clinical and radiological results at final follow-up showed no revision of femoral and/or tibial components for mechanical or septic reasons, and no signs of impending failure. One meniscal bearing, showing polyethylene wear after 17 years, was successfully replaced. CONCLUSIONS the present retrospective study confirmed the long-term effectiveness of knee implants with mobile bearings, in which the congruity of the surfaces makes it possible to overcome the problem of high contact stresses that may result in polyethylene wear and osteolysis; at the same time, these implants eliminate constraint forces thereby reducing the risk of mechanical loosening. LEVEL OF EVIDENCE Level III, retrospective comparative study.
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Affiliation(s)
- Giuseppe Solarino
- Orthopaedic Section, Department of Basic Medical Sciences, Neurosciences and Sensory Organs, University of Bari "Aldo Moro", Bari, Italy
| | - Antonio Spinarelli
- Orthopaedic Section, Department of Basic Medical Sciences, Neurosciences and Sensory Organs, University of Bari "Aldo Moro", Bari, Italy
| | - Massimiliano Carrozzo
- Orthopaedic Section, Department of Basic Medical Sciences, Neurosciences and Sensory Organs, University of Bari "Aldo Moro", Bari, Italy
| | - Andrea Piazzolla
- Orthopaedic Section, Department of Basic Medical Sciences, Neurosciences and Sensory Organs, University of Bari "Aldo Moro", Bari, Italy
| | - Giovanni Vicenti
- Orthopaedic Section, Department of Basic Medical Sciences, Neurosciences and Sensory Organs, University of Bari "Aldo Moro", Bari, Italy
| | - Biagio Moretti
- Orthopaedic Section, Department of Basic Medical Sciences, Neurosciences and Sensory Organs, University of Bari "Aldo Moro", Bari, Italy
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23
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Kim TK. CORR Insights®: Rotating-platform TKA no different from fixed-bearing TKA regarding survivorship or performance: a meta-analysis. Clin Orthop Relat Res 2014; 472:2194-6. [PMID: 24668075 PMCID: PMC4048439 DOI: 10.1007/s11999-014-3584-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Accepted: 03/13/2014] [Indexed: 01/31/2023]
Affiliation(s)
- Tae Kyun Kim
- Joint Reconstruction Center, Seoul National University Bundang Hospital, Gumi-dong, 166 Gumi-ro, Bundang-gu, Seongnam-si, Gyeonggi-do 463-707 South Korea
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