BACKGROUND Suture anchor placement for subscapularis repair is challenging. Determining the exact location and optimum angle relative to the subscapularis tendon direction is difficult because of the mismatch between a distorted arthroscopic view and the actual anatomy of the footprint. This study aimed to compare the reliability and reproducibility of the navigation-assisted anchoring technique with conventional arthroscopic anchor fixation. METHODS Arthroscopic shoulder models were tested by five surgeons. The conventional and navigation-assisted methods of suture anchoring in the subscapularis footprint on the humeral head were tested by each surgeon seven times. Angular results and anchor locations were measured and compared using the Wilcoxon signed rank test. Interobserver intraclass correlation coefficients (ICCs) were analyzed among the surgeons. RESULTS The mean angular errors of the targeted anchor fixation guide without and with navigation were 17° and 2° (p < 0.05), respectively, and the translational errors were 15 and 3 mm (p < 0.05), respectively. All participants showed a narrow range of anchor fixation angular and translational errors from the original target. Among the surgeons, the interobserver reliabilities of angular errors for ICCs of the navigation-assisted and conventional methods were 0.897 and 0.586, respectively, and the interobserver ICC reliabilities for translational error were 0.938 and 0.619, respectively. CONCLUSIONS The navigation system may help surgeons be more aware of the surrounding anatomy and location, providing better guidance for anchor orientation, including footprint location and anchor angle.

中文翻译：

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导航辅助缝合锚钉的插入，用于关节镜下旋转袖套的修复。

背景技术用于肩s下修复的缝合锚钉放置是具有挑战性的。相对于肩s下肌腱方向的确切位置和最佳角度是困难的，因为扭曲的关节镜视图与脚印的实际解剖结构不匹配。这项研究的目的是比较导航辅助锚固技术与传统关节镜下锚固技术的可靠性和可重复性。方法由五位外科医生测试关节镜肩部模型。每个外科医生均对缝线固定在肱骨头的肩cap下足印上的传统方法和导航辅助方法进行了七次测试。使用Wilcoxon符号秩检验来测量和比较角度结果和锚定位置。观察者之间的组内相关系数（ICCs）进行了分析。结果在不使用导航和使用导航的情况下，目标锚固固定器的平均角度误差分别为17°和2°（p <0.05），平移误差分别为15 mm和3 mm（p <0.05）。所有参与者均显示出较原始目标狭窄的锚固固定角度和平移误差。在外科医生中，导航辅助和常规方法的ICC的角度误差在观察者间的可靠性分别为0.897和0.586，观察者间ICC的平移误差的观察者间可靠性分别为0.938和0.619。结论导航系统可以帮助外科医生更多地了解周围的解剖结构和位置，从而为锚定方向提供更好的指导，