Objective: The aim of this study was to evaluate the relation between femoral rollback and range of motion (ROM) in patients with cruciate retaining (CR) and posterior stabilized (PS) total knee arthroplasty (TKA).
Methods: The study included 38 knees of 31 patients (26 female and 5 male) with primary knee arthrosis who underwent TKA. The posterior cruciate ligament (PCL) was sacrificed in 24 knees in the PS group and preserved in 14 in the CR group. Mean follow-up was 30.6 months. Patients were submitted to fluoroscopic lateral evaluation for ROM and femoral rollback assessment.
Results: Average ROM of the CR group was 106.43±9º and 105.43±11.7º for the PS group (p=0.78). Average femoral rollback was 10.5±9.7 mm and was significantly lower in the CR group (5.8±6.5 mm) than the PS group (13.2±10.5 mm) (p=0.026615). While there was no correlation between the femoral rollback and ROM for CR prostheses (p=0.78 and r=0.8), there was a significant correlation for PR prostheses (p=0.01 and r=0.49) with regression pointing to an increase of 0.545 degrees ROM for each unit of femoral rollback.
Conclusion: Despite increase in femoral rollback and its relation with ROM in PS TKA, there were no differences in ROM between CR and PS TKA.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.3944/AOTT.2014.2965 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Do Ultracongruent Inserts Reproduce the Intraoperative Sagittal Plane Kinematics of Posterior Stabilized TKR? Assessment Using a Modern Robotic System.
Indian J Orthop
January 2025
Department of Orthopaedics, Apollo Hospitals, Greams Road, Chennai, 600006 India.
Background: Ultracongruent (UC) total knee replacement (TKR) designs, serving as alternatives to posterior stabilized (PS) and cruciate retaining (CR) designs, lack conclusive evidence regarding posterior femoral rollback. This study aimed to compare intraoperative posterior femoral rollback and maximal knee flexion between UC and PS inserts, addressing the paucity of literature on femoral rollback achieved with UC designs in total knee replacement.
Methods: A consecutive cohort of 20 patients undergoing robotic-assisted primary total knee replacement, posterior femoral rollback and maximal intraoperative knee flexion were assessed.
Medial pivot total knee arthroplasty for valgus knees provides equivalent medial stability compared to that for varus knees: In vivo kinematic study.
J Exp Orthop
October 2024
Department of Orthopaedic Surgery, Faculty of Medicine The University of Tokyo Bunkyo-ku Tokyo Japan.
Purpose: The efficacy of medial pivot total knee arthroplasty (MP TKA) in treating valgus knees that may cause medial instability is unknown. The purpose of this study was to investigate the in vivo kinematics of MP TKA for the valgus knees and compare them to those for the varus knees.
Methods: The kinematics of 19 valgus knees and 19 varus knees operated in the MP TKA were investigated under fluoroscopy during squatting using a two- to three-dimensional registration technique.
Bi-cruciate stabilized total knee arthroplasty restores the native knee alignments better than conventional posterior stabilized total knee arthroplasty.
Arch Orthop Trauma Surg
December 2024
Department of Orthopaedic Surgery, Seoul National University College of Medicine, Bundang Hospital, 166 Gumi-ro, Bundang-gu, Seongnam-si, Gyeonggi-do, 463-707, South Korea.
Introduction: This study aimed to compare the differences in the radiological, clinical, and functional outcomes and the estimated restoration rate of native knee alignment between total knee arthroplasty (TKA) with bi-cruciate stabilized (BCS) and posterior stabilized (PS) design.
Materials And Methods: This retrospective study included consecutive patients between 2020 and 2021 who underwent TKA. The patients were divided into two groups (group I, Journey II BCS TKA [106 knees]; group II, Persona PS TKA [106 knees]) after 1:1 propensity score matching.
Evaluation of a novel robotic testing method for stability and kinematics of total knee arthroplasty.
Knee Surg Sports Traumatol Arthrosc
October 2024
Biomechanics Group, Mechanical Engineering Department, Imperial College London, London, UK.
Purpose: This work developed a novel preclinical test of total knee replacements (TKRs) in order to explain TKR instability linked to patient dissatisfaction. It was hypothesized that stability tests on the isolated moving prostheses would provide novel comparative data on the stability and kinematics among TKR designs.
Methods: Three TKR designs, DePuy Synthes Attune MS, Stryker Triathlon and Zimmer Biomet Persona MC, were assessed using a robotic arm while flexing-extending 0-140°.
Does Cruciate Ligament Substitution and Implant Asymmetry Make a Difference for Total Knee Arthroplasty Kinematics? A Multi-Implant Evaluation.
J Arthroplasty
October 2024
Center for Musculoskeletal Research, University of Tennessee-Knoxville, Knoxville, Tennessee.
Background: The non-implanted knee differs in comparison to total knee arthroplasty (TKA) designs, with regard to asymmetry and functionality of the anterior cruciate ligament and the posterior cruciate ligament. While surgeons may choose to implant either posterior stabilized (PS) or bi-cruciate stabilized (BCS) TKAs, substituting for one or both cruciate ligaments, the effects of symmetry versus asymmetry in substituting TKA designs have not been widely analyzed to determine possible benefits. Therefore, the objective of this research study was to determine if either TKA asymmetry and/or anterior ligament stabilization can lead to more normal-like kinematics and clinical benefit for patients.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!