Using double exposure of laser spoke photography and double exposure of laser holography techniques and macroscopy to measure the proximal part of the femur.

• 结果在股骨颈骨折内固定中,多针在对抗骨折面间旋转和剪力方面效果较好,而加压螺纹钉在对抗分离、剪力及旋转方面具有更好的固定效果。