BACKGROUND:The traditional orthopedic fixation by C-arm positioning surface is completed, but the large C-arm injury on the human body and the long fixed time increase the suffering of patients. OBJECTIVE:To investigate the X-ray fixed in position within the orthopedic implants, navigation and effect. METHODS:Twenty-six New Zealand white rabbits were randomly divided into C-arm machine group and X-ray group, with 13 in each group. Rabbits in both groups were used to simulate soft tissue foreign body localization, intramedul ary nail implantation at distal fracture end and spinal pedicle screw entry point position. In the C-arm machine group, positioning navigation was conducted with C-arm machine. In the X-ray group, X-ray positioning navigation was used. The positioning and navigation effects were compared between the two groups. RESULTS AND CONCLUSION:(1) Compared with the C-arm machine group, the time required for navigation in the X-ray group targeting soft tissue foreign body localization, fracture distal locking intramedul ary nail implantation and pedicle screw spinal needle point location was significantly shorter (P<0.05);navigation displacement and deviation produced were significantly less (P<0.05). (2) These findings suggested that the X-ray positioning for orthopedic fixation method is relatively simple, with high availability, and can obtain a high performance-price ratio. Meanwhile, the X-ray localization can improve accuracy and shorten the fixed time.%背景：传统骨科内固定时主要采用C臂机完成体表定位，但是C臂机对人体产生的损伤较大，固定时间较长，增加患者痛苦。目的：探讨光辅助X射线体表定位在骨科植入物内固定中定位、导航中的应用及效果。方法：26只新西兰大白兔随机分为C臂机组和光辅助X射线体表定位组，每组13只。2组大白兔均模拟软组织异物定位、骨折髓内钉远端锁钉置入、脊柱椎弓根螺钉进针点定位3种内固定方法，C臂机组采用C臂机进行定位导航，光辅助X射线体表定位组采用X射线进行定位导航，比较2组定位方法对大白兔内固定置入的定位、导航效果。结果与结论：①与C臂机组相比，光辅助X射线体表定位组在软组织异物定位、骨折髓内钉远端锁钉置入以及脊柱椎弓根螺钉进针点定位中定位导航所需要的时间显著缩短(P<0.05)，位移及角度偏差显著减小(P<0.05)；②结果表明，采用X射线对骨科内固定物进行定位操作方法相对简单，实用性较高，能获得较高的性价比，能提高内固定物置入准确性，缩短固定时间。
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