The Effect of Patellar Thickness on Intraoperative Knee Flexion and Patellar Tracking in Total Knee Arthroplasty.
From: Department of Orthopaedic Surgery, Harvard Combined Orthopaedic Surgery Residency, Massachusetts General Hospital, GRB 6, Boston, MA 02114, USA.
The Journal of arthroplasty
- Publish Date: Aug 2006
- ISSN: 0883-5403
- Volume: 21
- Issue: 5
- Pages: 650-5
- Medium: Print
- Language: English
- Citation (JAMA): Bengs Benjamin C, Scott Richard D, et al. The Effect of Patellar Thickness on Intraoperative Knee Flexion and Patellar Tracking in Total Knee Arthroplasty.. Aug 2006;21:650-5
Abstract
We designed a simple IRB-approved study to evaluate the intraoperative effect of patellar thickness on knee flexion and patellar tracking during total knee arthroplasty. Routine PCL-retaining total knee arthroplasty was performed in 31 consecutive knees. With clinical balance and congruent patella tracking established, custom trial patellar components that were thicker than the standard trial by 2-mm increments (2-8 mm) were sequentially placed and trialed. Passive flexion was recorded to the nearest 5 degrees with an intraoperative goniometer and gross mechanics of patellofemoral tracking were visually assessed. On average, passive knee flexion decreased 3 degrees for every 2-mm increment of patellar thickness. Furthermore, for the knee system used in this study, increased patellar thickness had no gross effect on patellar subluxation or tilt.
Mesh Headings (Keywords): Aged, Arthroplasty, Replacement, Knee, Biomechanics, Female, Humans, Knee Joint, Male, Patella, Prosthesis Design, Range of Motion, Articular, Treatment Outcome
Check for Full Text / PubMed Unique Identifier (PMID): 16877149
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