Matsuo Tomohiko, Kinugasa Kazutaka, Sakata Kousuke, Ohori Tomoki, Mae Tatsuo, Hamada Masayuki
Department of Orthopedic Sports Medicine, Hoshigaoka Medical Center, 4-8-1 Hoshigaoka, Hirakata, Osaka, 573-8511, Japan.
Department of Orthopedic Surgery, Osaka University Graduate School of Medicine, 2-2 Yamada-oka, Suita, Osaka, 565-0871, Japan.
Knee Surg Sports Traumatol Arthrosc. 2017 Feb;25(2):390-396. doi: 10.1007/s00167-016-4393-6. Epub 2016 Dec 23.
The purpose of this study was to investigate the morphology of the discoid lateral meniscus sequentially following a partial meniscectomy with repair using magnetic resonance imaging (MRI).
Nine patients with a symptomatic discoid lateral meniscus with a peripheral tear were enrolled in this study, and a partial meniscectomy with repair was performed arthroscopically. An MRI examination was performed 2 weeks after surgery (before weight bearing was permitted) and again 6 months after surgery (when sporting activities could resume). The width, height and distance of the discoid lateral meniscus were measured. The distance was defined as the distance between the edges of the discoid lateral meniscus and the tibia.
The width of the anterior, middle and posterior segments significantly decreased from 2 weeks to 6 months after surgery. The height of the middle and posterior segments significantly increased from 2 weeks to 6 months after surgery, whereas the height of the anterior segment did not significantly change. The distance of the anterior, middle and posterior segments significantly decreased from 2 weeks to 6 months after surgery.
The discoid lateral meniscus exhibited deformation and extrusion from 2 weeks to 6 months after a partial meniscectomy with repair. Therefore, the function of load transmission might not be maintained appropriately after surgery.
IV.
本研究旨在利用磁共振成像（MRI）对部分半月板切除术联合修复术后盘状外侧半月板的形态进行连续观察。
9例有症状的盘状外侧半月板伴周边撕裂的患者纳入本研究，在关节镜下进行部分半月板切除术联合修复。术后2周（允许负重前）及术后6个月（可恢复体育活动时）分别进行MRI检查。测量盘状外侧半月板的宽度、高度及间距。间距定义为盘状外侧半月板边缘与胫骨之间的距离。
术后2周与6个月相比，前、中、后段宽度均显著减小。术后2周与6个月相比，中段和后段高度显著增加，而前段高度无显著变化。术后2周与6个月相比，前、中、后段间距均显著减小。
部分半月板切除术联合修复术后2周至6个月，盘状外侧半月板出现变形和挤压。因此，术后可能无法适当维持负荷传递功能。
IV级。
