Niu Jinghui, Qi Qi, Piao Kang, Hao Kuo, Sharif Iftekhar, Wang Fei
Department of joint surgery, Hebei Medical University Third Affiliated Hospital, Shijiazhaung City, Hebei Province, China.
Department of Cardiology, Hebei Medical University Third Affiliated Hospital, Shijiazhaung City, Hebei Province, China.
BMC Musculoskelet Disord. 2021 Jan 29;22(1):119. doi: 10.1186/s12891-021-03977-4.
Torsional malalignment has been considered as a risk factor for patellar dislocation. But the influence of patellar dislocation for torsional alignment development remains unknown. The present study aims to investigate whether the torsional alteration of the hindlimb occurs after patellar dislocation in growing rabbits.
In the present study, 30 one-month-old rabbits were included. The experimental group consisted of 30 left knees of rabbits which underwent patellar lateral dislocation. The control group consisted of 30 right knees of the rabbits which no surgical procedure was performed. The Computed Tomography (CT) scan was performed after the surgery and at the point the rabbits were skeletal mature (5 months post-surgery). The angles of femoral version and tibial torsion were measured using a three-dimensional method and analyzed between the experimental group and the control group.
After the surgery, the femoral version and tibial torsion in the experimental and control group were not significantly different. However, 5 months after surgery, the angle of femoral version in the experimental group (-5.50 ± 6.13°) was significantly different from that in the control group (-10.90 ± 4.74°) (P < 0.05). But the angle of tibial torsion in the experimental group (7.17 ± 7.25°) and control group (4.47 ± 6.34°) were not significantly different (P = 0.144).
From this study, patellar dislocation can lead to alteration of femoral version in growing rabbits. So patellar dislocation may affect on lower extremity alignment. These findings may develop pathology and etiology of patellar dislocation.
扭转排列不齐被认为是髌骨脱位的一个危险因素。但髌骨脱位对扭转排列发育的影响尚不清楚。本研究旨在探讨生长兔髌骨脱位后后肢扭转是否发生改变。
本研究纳入30只1月龄兔。实验组由30只接受髌骨外侧脱位的兔的左膝组成。对照组由30只未进行手术的兔的右膝组成。术后及兔骨骼成熟时（术后5个月）进行计算机断层扫描（CT）。采用三维方法测量股骨扭转角和胫骨扭转角，并在实验组和对照组之间进行分析。
术后，实验组和对照组的股骨扭转角和胫骨扭转角无显著差异。然而，术后5个月，实验组的股骨扭转角（-5.50±6.13°）与对照组（-10.90±4.74°）有显著差异（P<0.05）。但实验组的胫骨扭转角（7.17±7.25°）与对照组（4.47±6.34°）无显著差异（P=0.144）。
本研究表明，髌骨脱位可导致生长兔股骨扭转改变。因此，髌骨脱位可能影响下肢排列。这些发现可能会完善髌骨脱位的病理和病因。
