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Rossi SMP, Sangaletti R, Jannelli E, Bova D, Montagna A, Benazzo F. PCL preservation or sacrifice does not influence clinical outcomes and survivorship at mid-term follow-up of a J-curve CR total knee replacement with a medial congruent liner and a functional coronal alignment. Arch Orthop Trauma Surg 2024; 144:307-313. [PMID: 37612567 DOI: 10.1007/s00402-023-05033-3] [Citation(s) in RCA: 1] [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: 05/22/2023] [Accepted: 08/09/2023] [Indexed: 08/25/2023]
Abstract
BACKGROUND In recent years, increasing interest has arisen for medial pivoting TKA implants, designed to mimic the physiological knee kinematics, maximizing the contact area on the medial compartment of the knee, increasing anterior-posterior stability, and contributing to a ball-in-socket effect that allows the posterior cruciate sacrifice without a post-CAM mechanism. The medial congruent liner works with a J-curve cruciate-retaining (CR) femur without a real ball-in-socket design. The aim of this study was to evaluate the clinical outcomes and survival of these implants, with or without PCL sparing, at a medium follow-up. METHODS Between October 2016 and October 2018, 165 TKRs were performed in 161 patients (69.2% females and 30.8% males) and prospectively followed. Mean follow-up was 72 ± 12 months. All surgeries were performed using an extramedullary device and the same prosthetic implant. Patients were matched in two groups: in 80 patients, the PCL was preserved; in 85 patients, the PCL was sacrificed with a reduction of the tibial slope. RESULTS The OKS and KSS improved in both groups. The difference between the two groups at the final follow-up was not statistically significant. Good-to-excellent clinical results according to the KSS were achieved in 93% of the knees in the PCP group and in 95% in the PCS group. At final follow-up, the Forgotten Joint Score (FJS) was 73.6 in the PCP group and 74.1 in the PCS group with no statistical difference between the two groups (P > 0.05). CONCLUSIONS TKA with a medially congruent insert, showed promising results at mid-term follow-up, PCL preservation or sacrifice did not affect the clinical outcomes and survival. Further follow-up will be needed to evaluate these results at long term.
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Affiliation(s)
- Stefano Marco Paolo Rossi
- Sezione di Chirurgia Protesica ad Indirizzo Robotico, Unità di Traumatologia dello Sport, UOC Ortopedia e Traumatologia, Fondazione Poliambulanza, Via Bissolati, 57, 25124, Brescia, Italy.
| | - Rudy Sangaletti
- Sezione di Chirurgia Protesica ad Indirizzo Robotico, Unità di Traumatologia dello Sport, UOC Ortopedia e Traumatologia, Fondazione Poliambulanza, Via Bissolati, 57, 25124, Brescia, Italy
| | - Eugenio Jannelli
- Clinica Ortopedica e Traumatologica, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy
| | - Davide Bova
- U.O. Ortopedia e Traumatologia, Humanitas Mater Domini, Castellanza, Italy
| | - Alice Montagna
- Sezione di Chirurgia Protesica ad Indirizzo Robotico, Unità di Traumatologia dello Sport, UOC Ortopedia e Traumatologia, Fondazione Poliambulanza, Via Bissolati, 57, 25124, Brescia, Italy
- Clinica Ortopedica e Traumatologica, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy
| | - Francesco Benazzo
- Sezione di Chirurgia Protesica ad Indirizzo Robotico, Unità di Traumatologia dello Sport, UOC Ortopedia e Traumatologia, Fondazione Poliambulanza, Via Bissolati, 57, 25124, Brescia, Italy
- IUSS, Istituto Universitario di Studi Superiori, Pavia, Italy
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Kakoulidis P, Panagiotidou S, Profitiliotis G, Papavasiliou K, Tsiridis E, Topalis C. Medial pivot design does not yield superior results compared to posterior-stabilised total knee arthroplasty: a systematic review and meta-analysis of randomised control trials. Knee Surg Sports Traumatol Arthrosc 2023; 31:3684-3700. [PMID: 36522493 DOI: 10.1007/s00167-022-07238-2] [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: 08/12/2022] [Accepted: 11/10/2022] [Indexed: 12/23/2022]
Abstract
PURPOSE The aim of this meta-analysis was a comparison between medial pivot (MP) and posterior-stabilised (PS) knee designs regarding functional and radiological outcomes as well as gait parameters. METHODS A systematic literature search was conducted in PubMed, Cochrane Library, Science Direct and Clinical Trials.gov from conception up to April 2022, to identify eligible randomised control trials (RCTs). The extracted data were analysed according to the Preferred Reporting Items for Systematic reviews and Meta-Analysis (PRISMA) statement. RESULTS Fifteen studies met inclusion criteria, enrolling 1101 patients who underwent 1242 total knee arthroplasties (TKAs). A total of 1158 TKAs (581 MP/577 PS) were included in the quantitative analysis. Mean follow-up ranged from 6 months up to 6.6 years. MP knees showed comparable range of motion (ROM) with PS design 1, 2 and 4 years postoperatively (p = 0.2, p = 0.25, p = 0.34, respectively). No statistical difference was found in patient-related outcome measures (PROMs) (p > 0.05). Mean walking speed (MWS), length of stay (LOS), radiographic alignment and complications rates were also similar between the two groups (p > 0.05). DISCUSSION The present meta-analysis demonstrated that the theoretical biomechanical advantage of MP implants does not have a better impact on patient satisfaction compared to the traditional PS knees. LEVEL OF EVIDENCE I.
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Affiliation(s)
- Panagiotis Kakoulidis
- School of Medicine, Aristotle University of Thessaloniki, Academic Orthopaedic Unit, Papageorgiou General Hospital, Thessaloniki Ring Road West, Nea Efkarpia, 56403, Thessaloniki, Greece.
| | - Sousana Panagiotidou
- School of Medicine, Aristotle University of Thessaloniki, Academic Orthopaedic Unit, Papageorgiou General Hospital, Thessaloniki Ring Road West, Nea Efkarpia, 56403, Thessaloniki, Greece
| | | | - Kyriakos Papavasiliou
- School of Medicine, Aristotle University of Thessaloniki, Academic Orthopaedic Unit, Papageorgiou General Hospital, Thessaloniki Ring Road West, Nea Efkarpia, 56403, Thessaloniki, Greece
| | - Eleftherios Tsiridis
- School of Medicine, Aristotle University of Thessaloniki, Academic Orthopaedic Unit, Papageorgiou General Hospital, Thessaloniki Ring Road West, Nea Efkarpia, 56403, Thessaloniki, Greece
- Center of Orthopaedics and Regenerative Medicine (C.O.RE.)-Center of Interdisciplinary Research and Innovation (C.I.R.I.)-Aristotle University Thessaloniki, Balkan Center, Buildings A and B, 10th km Thessaloniki-Thermi Rd, P.O. Box 8318, 57001, Thessaloniki, Greece
| | - Christos Topalis
- School of Medicine, Aristotle University of Thessaloniki, Academic Orthopaedic Unit, Papageorgiou General Hospital, Thessaloniki Ring Road West, Nea Efkarpia, 56403, Thessaloniki, Greece
- Center of Orthopaedics and Regenerative Medicine (C.O.RE.)-Center of Interdisciplinary Research and Innovation (C.I.R.I.)-Aristotle University Thessaloniki, Balkan Center, Buildings A and B, 10th km Thessaloniki-Thermi Rd, P.O. Box 8318, 57001, Thessaloniki, Greece
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Larger Medial Contact Area and More Anterior Contact Position in Medial-Pivot than Posterior-Stabilized Total Knee Arthroplasty during In-Vivo Lunge Activity. Bioengineering (Basel) 2023; 10:bioengineering10030290. [PMID: 36978681 PMCID: PMC10045283 DOI: 10.3390/bioengineering10030290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 02/06/2023] [Accepted: 02/10/2023] [Indexed: 03/03/2023] Open
Abstract
This study aimed to compare the in-vivo kinematics and articular contact status between medial-pivot total knee arthroplasty (MP-TKA) and posterior stabilized (PS) TKA during weight-bearing single-leg lunge. 16 MP-TKA and 12 PS-TKA patients performed bilateral single-leg lunges under dual fluoroscopy surveillance to determine the in-vivo six degrees-of-freedom knee kinematics. The closest point between the surface models of the femoral condyle and the polyethylene insert was used to determine the contact position and area. The nonparametric statistics analysis was performed to test the symmetry of the kinematics between MP-TKA and PS-TKA. PS-TKA demonstrated a significantly greater range of AP translation than MP-TKA during high flexion (p = 0.0002). Both groups showed a significantly greater range of lateral compartment posterior translation with medial pivot rotation. The contact points of PS-TKA were located significantly more posterior than MP-TKA in both medial (10°–100°) and lateral (5°–40°, 55°–100°) compartments (p < 0.0500). MP-TKA had a significantly larger contact area in the medial compartment than in the lateral compartment. In contrast, no significant differences were observed in PS-TKA. The present study revealed no significant differences in clinical outcomes between the MP and PS groups. The PS-TKA demonstrated significantly more posterior translations than MP-TKA at high flexion. The contact points are located more posteriorly in PS-TKA compared with MP-TKA. A larger contact area and medial pivot pattern during high flexion in MP-TKA indicated that MP-TKA provides enhanced medial pivot rotation.
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