Objective To improve the method of atlas pedicle screw fixation. Methods The anatomic data related to pedicle screw fixation were measured on 48 dry atlas specimens with an electronic caliper.
目的 探讨寰椎椎弓根螺钉的置钉方法。 方法 以电子游标卡尺测量48具干燥寰椎标本的相关解剖学数据；
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Method:40dry atlas specimens were used to measure anatomic data relative to screw placement technique with an electronic digital caliper and a goniometer.
方法：用电子游标卡尺和量角器对40例干燥寰椎标本测量与进钉技术相关的解剖学数据。
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Methods 50 dry atlas and axis specimens were used to measure anatomic data relative to atlas pedicle screw placement technique with an electronic digital caliper.