The total knee arthroplasty is the end-stage surgical procedure for pain relief in degenerative diseases such as arthritis. There have been many models designed in the five to six decades of arthroplasty history. This research has helped us in designing a new artificial high-flexion knee, which emphasizes a high flexion-extension range of over 125 degrees. This range provides comfort while squatting, even after the total knee replacement. This article discusses the usage of this novel design in the day-to-day activities of people in the Eastern world. The standard flexion-extension level of a normal knee was taken into account and verified on the new design. The results have been satisfactory, and the models have been proven to provide comfort during partial squatting. Our results show that this novel high-flexion knee provides three degrees of freedom compared with the six degrees of freedom in a natural knee.

Download full-text PDF

Source
http://dx.doi.org/10.1615/jlongtermeffmedimplants.v19.i4.30DOI Listing

Publication Analysis

Top Keywords

high-flexion knee
12
novel high-flexion
8
total knee
8
degrees freedom
8
knee
7
biomechanical evaluation
4
evaluation degree
4
degree freedom
4
freedom movements
4
movements novel
4

Similar Publications

Can Cadaver Testing Replicate In Vivo Kinematics of Total Knee Arthroplasty?

J Am Acad Orthop Surg

December 2024

From the Department of Molecular Medicine Arthritis Research, The Scripps Research Institute, La Jolla, CA (Kono and D'Lima), the Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan (Kono), the Department of Orthopaedic Biomaterial Science, Osaka University Graduate School of Medicine, Suita, Osaka, Japan (Kono, Ishibashi, Tamaki, Sugamoto, and Tomita), the Department of Information Systems, Faculty of Engineering, Saitama Institute of Technology, Fukaya, Saitama, Japan (Yamazaki), the Department of Orthopaedic Surgery, Osaka Medical Center, Chuo-ku, Osaka, Japan (Iwamoto), the Department of Engineering, Osaka University Graduate School of Medicine, Suita, Osaka, Japan (Sugamoto), and the Master Course of Health Sciences, Graduate School of Health Sciences, Morinomiya University of Medical Sciences, Suminoe Ward, Osaka, Japan (Tomita).

Introduction: Whether the kinematics of cadaveric knees recreate those of the patient's knees after total knee arthroplasty (TKA) remains unknown. This study compared in vivo and in vitro fluoroscopic kinematics of knees after TKA during knee bending using the same implant design.

Methods: Patients who had undergone cruciate-retaining and cruciate-substituting total knee arthroplasty (CR-TKA and CS-TKA) did squatting motions.

View Article and Find Full Text PDF

A high-flexion design total knee prosthesis: a ten to twelve-year follow-up study.

J Orthop Surg Res

September 2024

Department of Orthopaedic Surgery, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, 222, Banpo-daero, Seocho-gu, Seoul, 06591, Republic of Korea.

Background: The purpose of this study was to investigate the clinical and radiographic outcomes and to determine the survivorship of a high-flexion design total knee arthroplasty (TKA) prosthesis, the LOSPA knee system, over a follow-up period of 10-12 years.

Methods: The study included 386 patients (503 TKAs) who were treated with TKA from 2011 to 2013 (follow-up period 10-12 years).The patients were assessed clinically using range of motion (ROM) of the knee, the Knee Society scoring system (KSS), and the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC).

View Article and Find Full Text PDF

Purpose: The purpose of this study was to investigate the effect of anterolateral ligament reconstruction (ALLR) or lateral extra-articular tenodesis (LET) fixation at low versus high flexion angles during anterior cruciate ligament reconstruction (ACLR) on rotation or translational knee stability.

Methods: The inclusion criteria for this study were (1) cadaveric study, (2) cadaveric specimens underwent ACLR, (3) cadaveric specimen underwent ALLR or LET and (4) specimen preparation technique described the knee flexion angle at the time of ALLR or LET tensioning and fixation. A priori, 'low flexion' was defined as 0-30° and 'high flexion' was defined as 60-90° at graft fixation.

View Article and Find Full Text PDF

Total knee arthroplasty (TKA) and unicompartmental knee arthroplasty (UKA) are effective surgeries to treat end-stage knee osteoarthritis. Clinicians assume that TKA alters knee kinematics while UKA preserves native knee kinematics; however, few studies of in vivo kinematics have evaluated this assumption. This study used biplane radiography to compare side-to-side tibiofemoral kinematics during chair rise, stair ascent, and walking in 16 patients who received either TKA or UKA.

View Article and Find Full Text PDF

Background: Enlargement of the bone tunnel has become an unavoidable early complication after anterior cruciate ligament (ACL) reconstruction, whether it is a single or double-bundle ACL reconstruction. Preservation of the ACL stump in ACL reconstruction reduces enlargement of the bone tunnel. The purpose of this study was to investigate the question of whether single-bundle ACL reconstruction using the ACL femoral side retained stump technique reduces enlargement of the femoral tunnel.

View Article and Find Full Text PDF

Want 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!