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Does varus alignment increase after medial meniscectomy?

Kyoung Ho Yoon¹, Sang Hak Lee, Dae Kyung Bae

¹Department of Orthopaedic Surgery, School of Medicine, Kyung Hee University, 1 Hoegi-Dong, Dongdaemoon-Gu, Seoul, 130-702, South Korea.

Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA

|November 13, 2012

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Arthroscopic meniscectomy for medial meniscus tears can worsen lower extremity varus alignment. Total meniscectomy leads to a greater increase in varus deformity compared to partial meniscectomy.

Area of Science:

Orthopedic Surgery
Biomechanical Analysis

Background:

Medial meniscus tears are common, often treated with arthroscopic meniscectomy.
Lower extremity alignment is crucial for joint health and function.
The impact of meniscectomy on varus alignment requires further investigation.

Purpose of the Study:

To determine if arthroscopic meniscectomy for medial meniscus tears increases lower extremity varus alignment.
To identify factors associated with changes in varus alignment post-surgery.

Main Methods:

Retrospective comparative study of 56 patients (20-60 years) who underwent arthroscopic medial meniscectomy.
Lower extremity alignment measured preoperatively and at a minimum 5-year follow-up.
Multiple linear regression analysis to assess factors influencing varus alignment change.

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Main Results:

Varus deformity significantly increased by 1.7° post-surgery (p=0.000).
Total meniscectomy was significantly associated with a greater increase in varus alignment compared to partial meniscectomy (p=0.002).
Sex, age, BMI, preoperative alignment, cartilage injury, and follow-up duration did not significantly relate to alignment changes.

Conclusions:

Arthroscopic meniscectomy for medial meniscus tears aggravates lower extremity varus alignment.
Total meniscectomy results in a more pronounced increase in varus deformity than partial meniscectomy.