低强度脉冲超声促进兔髌骨-髌腱连接点纤维软骨愈合的形态学分析

目的: 观察低强度脉冲超声对兔髌骨-髌腱连接点愈合的影响。方法: 60只成熟雌性新西兰大白兔按同一标准行髌骨部分切除术,术后按治疗方式随机分成对照组和治疗组。对照组术后给予安慰治疗,治疗组术后3d~6周给予低强度脉冲超声治疗。分别于术后6,12,18周时处死动物并获取髌骨-髌腱复合体标本,标本常规脱钙后做成切片行H&E染色与番红素染色用于组织学观察。利用SANO Microscope Partner显微图像测量软件进行组织学分析,比较两组纤维软骨层厚度与灰度值差异。结果: 术后6,12和18周时,治疗组的纤维软骨层厚度明显大于对照(P<0.01),灰度值明显小于对照(P<0.01)。结论: 低强度脉冲超声可以促进兔髌骨-髌腱连接点纤维软骨层的愈合。

Histomorphological analyse of accelerating the fibrocartilage layer repair of patella-patellar tendon junction in rabbits by low intensity pulsed ultrasound stimulation

Objective: To analyse the effect of low intensity pulsed ultrasound stimulation (LIPUS) on accelerating the fibrocartilage layer repair of patella-patellar tendon junction. Methods: A total of 60 mature female New Zealand white rabbits undergoing standard partial patellectomy were divided into 2 groups randomly. The control group was given comfort threatment and the treatment group was given LIPUS treatment starting from day 3 to the end of week 6 postoperatively. The scheduled time points of animal euthanization would be at week 6, week 12 and week 18 postoperatively. The patella-patellar tendon (PPT) complex would be harvested and cut into sections after decalcification for H&E staining, Safranine o/fast green staining. The thickness and gray value of fibrocartilage layer were analyzed by SANO Microscope Partner image analyzer. Results: At week 6, week 12 and week 18 postoperatively, the fibrocartilage layer in the treatment group was significantly thicker than that in the control group (P<0.01), and the gray value of fibrocartilage layer was significantly smaller than that in the control group (P<0.01). Conclusion: LIPUS helps to accelerate the fibrocartilage layer repair of patella-patellar tendon junction in rabbit models.