Enomoto Shota, Tsushima Aiko, Oda Toshiaki, Kaga Masaru
Joint Graduate School in Science of School Education.
Division of Developmental Studies and Support.
J Pediatr Orthop. 2020 Apr;40(4):e243-e247. doi: 10.1097/BPO.0000000000001426.
Osgood-Schlatter disease (OSD) is a sports-related disorder involving apophysitis, which affects the tibial tuberosity. The identification of factors related to OSD is important for its prevention and early recovery from the disease. This study aimed to compare the passive mechanical properties of the muscle-tendon unit in children affected by an OSD and healthy children, by using ultrasound real-time tissue elastography.
Eighteen legs affected by OSD (OSD group) and 42 healthy legs (control: CON group) were assessed. The elasticity was obtained from the quadriceps muscles and patella tendon (PT) using real-time tissue elastography. The strain ratio (SR; muscle or tendon/reference ratio: strain rate of the muscle or tendon divided by that of the reference material) was calculated as an indicator of the elasticity of the tissue of interest.
The SR of the PT in the OSD group was significantly lower than that in the CON group (P<0.05). We found no significant difference between the groups in terms of the SR value of all muscles (P>0.05).
The results suggest that a PT with a lower SR may be associated with an OSD and that the passive mechanical properties of the quadriceps muscles have limited association with an OSD.
Level IV.
奥斯古德-施拉特病（OSD）是一种与运动相关的涉及骨突炎的疾病，影响胫骨结节。识别与OSD相关的因素对其预防和疾病早期康复很重要。本研究旨在通过超声实时组织弹性成像比较OSD患儿和健康儿童肌腱单位的被动力学特性。
评估18条受OSD影响的腿（OSD组）和42条健康腿（对照组：CON组）。使用实时组织弹性成像从股四头肌和髌腱（PT）获取弹性。计算应变率（SR；肌肉或肌腱/参考比率：肌肉或肌腱的应变率除以参考材料的应变率）作为感兴趣组织弹性的指标。
OSD组PT的SR显著低于CON组（P<0.05）。我们发现两组所有肌肉的SR值无显著差异（P>0.05）。
结果表明SR较低的PT可能与OSD相关，且股四头肌的被动力学特性与OSD的关联有限。
四级。
