Pedicle screw placement is a common internal fixation technology used in spine surgery, with preoperative planning and assessment being one of the most important steps. Preoperative planning mainly refers to determining the path and parameters of screws, and preoperative assessment mainly refers to effects during and after operations (i.e., firmness, etc.). Technologies available at present lack effective quantitative assessments on the firmness of screws. Bone mineral density (BMD) is one of the most important influencing factors for firmness. To address the aforementioned problems, this study aimed to put forward quantitative assessments for the firmness of pedicle screws taking bone mass as the basis. In other words, quantitative assessments of the firmness of screw trajectories were made by computing the total mineral content of the bone supporting screws. Meanwhile, the quantitative assessment results of the firmness were used as the optimized objective functions to put forward and realize an automatic planning optimization method for screw trajectories. The findings of this study might provide more complete and simplified planning schemes for doctors, to enhance the postoperative firmness of screws effectively, prevent from issues such as the loosening of screws due to the low value of a patient’s bone mass, and promote the effects of operations.

中文翻译：

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椎弓根螺钉牢固度定量评估及轨迹自动优化方法

椎弓根螺钉置入是脊柱手术中常用的内固定技术，术前计划和评估是最重要的步骤之一。术前规划主要是指确定螺钉的路径和参数，术前评估主要是指术中和术后的效果（即牢固度等）。目前可用的技术缺乏对螺钉牢固度的有效定量评估。骨矿物质密度（BMD）是影响硬度的最重要因素之一。针对上述问题，本研究旨在以骨量为基础，对椎弓根螺钉的牢固度进行定量评价。换一种说法，通过计算骨支撑螺钉的总矿物质含量，对螺钉轨迹的坚固性进行了定量评估。同时，以牢固度定量评价结果作为优化目标函数，提出并实现了螺旋轨迹的自动规划优化方法。本研究结果可能为医生提供更完整、更简化的规划方案，有效提高术后螺钉的牢固度，防止因患者骨量值过低而导致螺钉松动等问题，促进术后螺钉的效果。操作。