Association Between Sagittal Patellar Offset and Anterior Knee Pain in Total Knee Arthroplasty

Overview

The aim of this study to evaluate whether the position of the sagittal patellar offset is a predictive factor for anterior knee pain in subjects having undergone bilateral multiradius total knee replacement.

Full Title of Study: “Association Between Sagittal Patellar Offset and Anterior Knee Pain After Multiradius Total Knee Replacement.”

Study Type

  • Study Type: Observational
  • Study Design
    • Time Perspective: Prospective
  • Study Primary Completion Date: April 23, 2025

Detailed Description

A prospective, observational study. A total of to 80 subjects requiring bilateral multiradius knee arthroplasty will be enrolled. Anterior femoral offset, femoral diameter and patellar offset will be measured by orthopaedic surgeons. In addition, Visual Analogue Scale Score, Oxford Knee Score, WOMAC, SF12 and SF36 will be evaluated postoperative in patients long-term follow up to see if there is a relationship between anterior femoral offset and anterior knee pain.In the direct lateral knee joint radiograph, the distance between the two parallel axis extending from both cortices of the femur is measured as "femoral diameter".The remaining length between the anterior axis and the maximum peak at the anterior of the prosthesis is considered as an "anterior femoral offset"[1]. Sagittal patellar offset defined by us as the ratio of the anterior femoral offset to the remaining distance between the maximum anterior point of the patella and the posterior vertex in the direct lateral knee joint radiography.

Clinical Trial Outcome Measures

Primary Measures

  • anterior patellar offset ratio
    • Time Frame: minimum 1 year
    • The distance between the anterior cortex of the femur and the maximum peak at the anterior of the prosthesis is considered as an “anterior femoral offset”[1].Sagittal patellar offset defined by us as the ratio of the anterior femoral offset to the remaining distance between the maximum anterior point of the patella and the posterior vertex in the direct lateral knee joint radiography.

Participating in This Clinical Trial

Inclusion Criteria

  • Patients over 50 years of age with primary severe gonarthrosis who will undergo total knee replacement Exclusion Criteria:

  • Patients with severe gonarthrosis, with a history of malignancy, with severe extraarticular deformity, with posttraumatic and septic arthritis sequel

Gender Eligibility: All

Minimum Age: 50 Years

Maximum Age: 100 Years

Are Healthy Volunteers Accepted: No

Investigator Details

  • Lead Sponsor
    • Bezmialem Vakif University
  • Provider of Information About this Clinical Study
    • Principal Investigator: Orkhan Aliyev, Residents Doctor, Department of Orthopaedics and Traumatology, Principal investigator, M.D. – Bezmialem Vakif University

References

Scott CEH, Clement ND, Yapp LZ, MacDonald DJ, Patton JT, Burnett R. Association Between Femoral Component Sagittal Positioning and Anterior Knee Pain in Total Knee Arthroplasty: A 10-Year Case-Control Follow-up Study of a Cruciate-Retaining Single-Radius Design. J Bone Joint Surg Am. 2019 Sep 4;101(17):1575-1585. doi: 10.2106/JBJS.18.01096.

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