The main failure form of V-round-thread casing that is the mechanism of thread connection slipping off is analyzed in this paper .

本文对 V 形 圆 扣套管 联接 强度失效的主要形式，即套管联接 螺纹滑 扣（或滑脱）失效的机理进行了分析研究。

Methods Finite element models of segment jaw bone with a V-shaped thread implant were created . The thread pitch ( P ) was set from 0.5 mm to 1.6 mm . The maximum Equivalent stresses ( EQV stresses ) in jaw bone and in implant were evaluated .

方法建立了包含圆柱状 V 形 螺纹种植体的颌骨骨块三维有限元模型，设定螺纹螺距（P）范围为0.5～1.6mm，观察P变化对颌骨和种植体Equivalen（tEQV）应力峰值的影响。

The analysis of slipping mechanism of v - round - thread connection in casing

V 形圆扣套管联接 螺纹滑扣的机理分析