AI Article Synopsis
- Malalignment, especially femoral component malrotation, is a major issue in total knee replacement surgeries that can lead to failures.
- The paper aims to highlight clinical impacts of rotational malalignment and examine knee joint models related to this problem, providing a foundation for further research.
- Key aspects for future models include considering friction between implant pieces, the role of ligaments, the flexibility of the polyethylene inlay, and incorporating individual anatomical differences for better accuracy.
Article Abstract
Malalignment, in particular femoral component malrotation, is a commonly accepted failure mode in total knee arthroplasty. The general objective of this paper is twofold: firstly, it accentuates clinical observations of the effects of rotational malalignment in total knee arthroplasty. Secondly, it discusses the relevant parameters of existing knee joint models with regards to rotational malalignment and its biomechanical background, thereby setting a basis for future studies. To summarise, when modelling malalignment in total knee arthroplasty, the following aspects should be considered: Friction between the implant components, ligamentous and capsular structures, deformable body to model the PE inlay, and an in vivo validation of the model. Because of the large variance in anthropometrical data between individuals, future knee joint models should also incorporate individual data.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.clinbiomech.2005.03.014 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Correction of Femoral Torsional Deformities by Rotational Guided Growth.
J Clin Med
December 2024
Pediatric Orthopedics, Hadassah-Hebrew University Medical Center, Jerusalem 9112001, Israel.
: Femoral torsional malalignment is a common cause of in-toeing and out-toeing in children, often leading to gait disturbances, functional limitations, and increased risk of falls. Traditionally, osteotomy was the only surgical option for correction. A minimally invasive technique known as rotational guided growth (RGG) has recently been introduced to address these malalignments.
View Article and Find Full Text PDFAssessing Femoral Anteversion in Patients With Bilateral Recurrent Patellar Dislocations.
Orthop J Sports Med
December 2024
Department of Orthopaedics, Unit of Musculoskeletal Surgery, Tampere University Hospital, Finland.
Background: After first-time lateral patellar dislocation, 44% to 70% of patients sustain redislocations. Increased femoral anteversion (FA) is considered to result in increased lateralizing forces on the patella, which might predispose one to patellar instability. When recurrent patellar dislocations (RPDs) are bilateral, it is unclear if the FA is even more increased.
View Article and Find Full Text PDFConceptual modeling of structural malalignments and ankle joint contact forces during walking.
Gait Posture
December 2024
MOTION Science Institute, Department of Exercise & Sport Science, University of North Carolina at Chapel Hill, NC, United States.
Background: Structural malalignments, such as talar malalignments and hindfoot varus, are hypothesized to contribute to early ankle joint degeneration by altering joint contact force (JCF). These malalignments, common in individuals with chronic ankle instability (CAI), can modify the articular geometry of the ankle joint, potentially leading to abnormal joint loading patterns. This study leverages musculoskeletal modeling and simulation to conceptualize the effects of increasing severity of these malalignments on ankle JCF during walking.
View Article and Find Full Text PDFPreoperative quadriceps malalignment is associated with poor outcomes after knee replacement which are avoided by external rotation of the femoral component.
Knee Surg Sports Traumatol Arthrosc
December 2024
Department of Orthopaedic Surgery, Western Health, Melbourne, Australia.
Purpose: Lateralisation of the proximal apex of the quadriceps tendon relative to the mechanical axis or external rotation relative to the femoral shaft can be accurately measured and is strongly associated with patella maltracking. The aim of this study was to first assess the association between preoperative quadriceps tendon alignment (QTA) and the patient-reported outcomes (PROMs) of total knee replacement, and second, determine the influence of component position on outcomes in patients with preoperative quadriceps tendon malalignment (QTM).
Methods: A retrospective analysis of prospectively collected data was performed.
Orthopedic or Surgical Treatment in Gartland Type II Supracondylar Humerus Fractures: A Systematic Review.
Indian J Orthop
December 2024
Departamento de Fisiología, Universidad de Valencia, Valencia, Spain.
Background: There is a broad consensus among orthopedic surgeons in the treatment of Gartland type I supracondylar humerus fractures (conservative) and Gartland type III (surgical) fractures, but there is controversy regarding the treatment of choice for Gartland type II fractures. The aim was to analyze the existing current evidence on the choice of surgical or conservative treatment of Gartland type II supracondylar humerus fractures.
Methods: A systematic review was carried out following the PRISMA guidelines.
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!