Effect of arthroscopic resection for discoid lateral meniscus on the axial alignment of the lower limb
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This study was designed to investigate the changes in the lower limb axial alignment and knee joint function after arthroscopic resection of discoid lateral menisci.
Pre-operative and post-operative full-length weight-bearing radiographs of the lower limb were obtained from 60 patients with discoid lateral menisci from August 2015 to August 2016. Twenty-four patients were treated with meniscectomy and 36 cases were treated with meniscoplasty. The axial alignment of the lower limb was measured, and changes in the lower limb axial alignment before and after surgery were analyzed. The effects of differing degrees of meniscal resection on the lower limb axial alignment were compared and analyzed. Knee joint function on the affected side was scored using the Lysholm knee scoring, Tegner activity, and International Knee Documentation Committee (IKDC) subjective scales before surgery and one, six and 12 months after surgery.
There were apparent changes in the lower limb axial alignment after surgery (p < 0.01). The changes were more conspicuous after a total meniscectomy than a meniscoplasty but were insignificant (p > 0.05). Intragroup comparisons of the Lysholm knee, IKDC, and Tegner scores before and after surgery revealed significant differences (p < 001). However, the differences were not significant between the two surgical approaches (p > 0.05).
For those with considerable genu varum or genu valgum after surgery, individualized therapy should be developed to correct the lower limb axial alignment and to prevent articular cartilage degeneration. Arthroscopic resection of a discoid lateral meniscus greatly improves knee joint function.
KeywordsDiscoid meniscus Axial alignment of the lower limb Biomechanics Arthroscopy
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
This study was obtained from the hospital Ethics Committee. Authors had to obtain patient consent before enrolling participants in this study.
Informed consent was obtained from all individual participants included in the study.
- 1.Young RB (1889) The external semilunar cartilage as a complete discoid meniscus and memoranda in anatomy. Williams and Nortage, LondonGoogle Scholar
- 3.Ikeuchi H (1982) Arthroscopic treatment of the discoid lateral meniscus. Technique and long-term results. Clin Orthop Relat Res 167:19–28Google Scholar
- 10.Zhu W, Chern KY, Mow VC (1994) Anisotropic viscoelastic shear properties of bovine meniscus. Clin Orthop Relat Res 306:34–45Google Scholar
- 18.Kurosawa H, Fukubayashi T, Nakajima H (1980) Load-bearing mode of the knee joint: physical behavior of the knee joint with or without menisci. Clin Orthop Relat Res 149:283–290Google Scholar
- 20.Sharma L, Song J, Dunlop D, Felson D, Lewis CE, Segal N, Torner J, Cooke TD, Hietpas J, Lynch J, Nevitt M (2010) Varus and Valgus alignment and incident and progressive knee osteoarthritis. Ann Rheum Dis 69(11):1940–1945. https://doi.org/10.1136/ard.2010.129742 CrossRefPubMedPubMedCentralGoogle Scholar
- 21.Prakash J, Song EK, Lim HA, Shin YJ, Jin C, Seon JK (2017) High tibial osteotomy accelerates lateral compartment osteoarthritis in discoid meniscus patients. Knee Surg Sports Traumatol Arthrosc. https://doi.org/10.1007/s00167-017-4422-0