RT-PCR analysis showed that mechanical forces enhanced expression of BMP-4 and BMP-6. BMP-7 was weakly expressed.

PCR分析显示机械牵张力能提高BMP -4和BMP -6的表达，而BMP -7仅在牵引期后期和固塑期早期微弱表达。

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There was no significant difference of BMP-2 and VEGF between experimental group and control group at 3 weeks and 6 weeks after fracture (P > 0.05).

两组在骨折后3周和6周的骨形态发生蛋白2及血管内皮生长因子差异无显著性意义（P > 0.05）。

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There was no significant difference of BMP-2 and VEGF between experimental group and control group at 3 weeks and 6 weeks after fracture (P > 0.05).

两组在骨折后3周和6周的骨形态发生蛋白2及血管内皮生长因子差异无显著性意义（P > 0.05）。

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