方法：回顾分析我科分别用涡轮机钻法和凿劈法拔除的524例下颌第三磨牙阻生病例中，出现术中或术后并发症的131例病例。
Methods: 524 cases of impacted mandibular third molars were extracted with air turbine handpiece or chisel, in which 131 cases happened complications during operation or post-operation.
目的观察双刀劈核法在小切口白内障囊外摘出术中应用的效果。
Objective To observe the clinical effect of two knives horizontal nucleus chopping on small incision extracapsular cataract extraction.
然后通过磁场积分方程，运用简单矩量法求得劈附近的电流和未知的绕射系数。
The magnetic field equation is solved to obtained four coefficients and the currents in the close vicinity of the edges.
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