ISAKOS: 2019 Congress in Cancun, Mexico
ISAKOS

2019 ISAKOS Biennial Congress ePoster #909

 

Medial Unicompartmental Knee Arthroplasty with Lateral Meniscus Lesion in Preoperative MRI

Sang-Jin Park, MD, Gwangju KOREA, REPUBLIC OF
Jae-Hoon Chung, MD, PhD, Gwangju KOREA, REPUBLIC OF

Segeyro Hospital, Gwangju, KOREA, REPUBLIC OF

FDA Status Cleared

Summary

The result of UKA for medial unicompartmental knee osteoarthritis was excellent regardless of preoperative lateral meniscal pathology in the MRI, if patient had no symptoms related to the lateral meniscus lesion. There was a mild varus alignment for those who had a lateral meniscal lesion provided satisfactory clinical outcome of medial UKA.

Abstract

Purpose

The purpose of the present study was to compare functional outcomes of medial unicompartmental knee arthroplasty (UKA) in patients with lateral meniscal lesion (LM (+) group) in the preoperative MRI and those without lateral meniscal pathology (LM (-) group) and to evaluate the effect of lateral meniscus lesion in preoperative MR on functional outcomes after UKA.

Methods

The outcomes of 66 knees (LM (+) group) were compared to the outcomes of 54 knees (LM (-) group) with a median follow-up of 26 months (range 12-36 months). Clinical outcomes including KS object score, KS pain score, lateral side pain, physical exam for lateral meniscal lesion and squatting ability. Radiological parameters (mechanical axis and component position) were compared and their effects on functional outcomes were evaluated at the final follow-up visits.

Result: At final follow-up visits, no significant intergroup difference was found about KS object score, presence of lateral side pain, positive physical examination for meniscal lesion and squatting ability. LM (+) group had a tendency of more varus postoperative mechanical axis, showed better KS pain score and more comfortable feeling during squatting activity. Furthermore, no correlation was found between postoperative mechanical axis and functional outcome variables.

Conclusions

The result of UKA for medial unicompartmental knee osteoarthritis was excellent regardless of preoperative lateral meniscal pathology in the MRI, if patient had no symptoms related to the lateral meniscus lesion. There was a mild varus alignment for those who had a lateral meniscal lesion provided satisfactory clinical outcome of medial UKA.