| 王 靖,张朝跃.早期制动对兔髌骨-髌腱连接点断裂修复的生物力学影响[J].中国康复医学杂志,2012,27(11):1031~1035 |
| 早期制动对兔髌骨-髌腱连接点断裂修复的生物力学影响 点此下载全文 |
| 王 靖 张朝跃 |
| 湖南省人民医院骨科，长沙，410005 |
| 基金项目： |
| DOI： |
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| 摘要
目的：探讨早期制动对兔髌骨－髌腱连接点(BTJ)断裂修复的生物力学影响。
方法：36只成年新西兰大白兔随机分为实验组(18只)和对照组(18只)，建立兔髌BTJ损伤修复模型后实验组予以石膏固定3周后去除，对照组不予固定，分别在术后2、4、8周取髌骨-髌腱复合体标本比较横截面积、拉断负荷以及极限拉应力的差异。
结果：术后2、4、8周实验组横截面积分别为：(22.38±4.25)mm2、(17.13±3.68)mm2、(14.65±3.27)mm2，对照组分别为：(24.45±4.47)mm2、(22.74±4.18)mm2、(16.78±4.03)mm2；实验组拉断负荷分别为：(35.92±8.68)N、(81.05±9.16)N、(172.58±15.66)N，对照组分别为：(33.64±7.89)N、(56.69±8.56)N、(136.09±15.20)N；实验组极限拉应力为：(1.76±0.64)MPa、(5.23±0.93)MPa、(14.26±2.02)MPa，对照组极限拉应力：(1.68±0.67)MPa、(3.72±1.07)MPa、(9.13±1.66)MPa。术后2周横截面积、拉断负荷以及极限拉应力无显著性差异(P＞0.05)，术后4周、8周实验组和对照组横截面积、对照组拉断负荷及极限拉应力比较均有显著性差异(P＜0.05)。
结论：术后早期制动促进韧带塑型，提高BTJ拉断负荷以及极限拉应力，可加快兔髌BTJ的损伤修复，改善BTJ的生物力学性能，促进其愈合。 |
| 关键词：骨-肌腱连结点 制动 髌骨 生物力学 |
| Biomechanical influence of early immobilization on rupture and repair of patellar bone-tendon junction of rabbit Download Fulltext |
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| Dept of Orthopaedics, Hunan Provincial People's Hospital, Changsha, 410005 |
| Fund Project: |
| Abstract: |
| Abstract
Objective: To investigate biomechanical influence of early immobilization on rupture and repair of patellar bone-tendon junction（BTJ） of rabbits.
Method: Thirty-six adult New Zealand rabbits (18 weeks old) were established the BTJ ruputure and repair model, and randomly divided into two groups, the immobilization group (18 rabbits,immobilized for 3 weeks) and the control group (18 rabbits, without immobilization). In both groups the samples of patellar-tendon complex were sectioned 2 weeks (6 rabbits), 4 weeks (6 rabbits) and 8 weeks (6 rabbits) after operation respectively. All the samples were used for biomechanical tests, including cross-section area, breaking load and ultimate tensile stress.
Result: The cross-section areas of experimental group at 2, 4, 8 weeks after operation were (22.38±4.25)mm2, (17.13±3.68)mm2 and (14.65±3.27)mm2 respectively; that of the control group were (24.45±4.47)mm2,(22.74±4.18)mm2 and (16.78±4.03)mm2 respectively. Breaking load of experimental group were (35.92±8.68)N, (81.05±9.16)N and (172.58±15.66)N respectively; that of control group were (33.64±7.89)N, (56.69±8.56)Nand (136.09±15.20)N respectively. Ultimate tensile stress of experimental group were (1.76±0.64)MPa, (5.23±0.93)MPa and (14.26±2.02)MPa respectively; that of control group were (1.68±0.67)MPa，(3.72±1.07)MPa and (9.13±1.66)MPa respectively. Comparing the cross-section area, breaking load and ultimate tensile stress of two groups, there was no significant difference (P＞0.05) at 2 weeks after operation and existed significant difference(P＜0.05) at 4, 8 weeks after operation.
Conclusion: Early immobilization on rupture of patellar BTJ can accelerate repairing the injury, improved the biomechanical characteristics and facilitated the BTJ healing in rabbits. |
| Keywords:bone-tendon junction immobilization patella biomechanics |
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