CAJ | 학술논문

背景：椎弓根螺钉内固定是目前脊柱手术的主流术式，置钉安全性的关键是使螺钉通过椎弓根中心，置钉角度是决定修复质量的关键因素，以往文献中确定置钉角度多以患者躯体作为参照物，容易被体位等因素干扰。目的：应用数字技术以椎体局部解剖标志为参照物对下腰椎椎弓根螺钉置钉角度进行测量。<br>　　方法：选取100例患者的3D-CT资料，将第4，5腰椎进行三维重建后利用数字技术进行模拟手术，实现最佳位置置钉。完成模拟置钉操作以后，对椎弓根螺钉的角度进行测量，以螺钉中线与棘突中线所在平面的夹角作为冠状位角度，以螺钉中线与椎体上表面所在平面的夹角作为矢状位角度。<br>　　结果与结论：测量结果表明，各角度均较以往文献中所介绍的角度大，考虑为选取参照标志不同所致。各角度值的标准差也较大，说明椎弓根解剖差异较大，因此应注重个体化置钉。这种以单个椎体的解剖标志作为定位参考的方法可以最大程度避免体位的干扰，与术前三维重建等数字技术相结合，更符合个体化置钉的要求，能有效提高置钉的准确性。
배경：추궁근라정내고정시목전척주수술적주류술식，치정안전성적관건시사라정통과추궁근중심，치정각도시결정수복질량적관건인소，이왕문헌중학정치정각도다이환자구체작위삼조물，용역피체위등인소간우。목적：응용수자기술이추체국부해부표지위삼조물대하요추추궁근라정치정각도진행측량。<br>　　방법：선취100례환자적3D-CT자료，장제4，5요추진행삼유중건후이용수자기술진행모의수술，실현최가위치치정。완성모의치정조작이후，대추궁근라정적각도진행측량，이라정중선여극돌중선소재평면적협각작위관상위각도，이라정중선여추체상표면소재평면적협각작위시상위각도。<br>　　결과여결론：측량결과표명，각각도균교이왕문헌중소개소적각도대，고필위선취삼조표지불동소치。각각도치적표준차야교대，설명추궁근해부차이교대，인차응주중개체화치정。저충이단개추체적해부표지작위정위삼고적방법가이최대정도피면체위적간우，여술전삼유중건등수자기술상결합，경부합개체화치정적요구，능유효제고치정적준학성。
BACKGROUND:Pedicle screw fixation is the mainstream type of spine operation currently. The key point of the fixation is to make the screw pass through the center of pedicle. The angle of pedicle screw implantation is a key factor for repair quality. In previous literatures, angle of pedicle screw is determined according to the patient body, and is easily disturbed by factors such as position of the body. OBJECTIVE:To determine the inserting angle of pedicle screw of lower lumbar spine taking local anatomic landmark as a reference using digital technology. METHODS:3D-CT data of 100 patients were selected. The fourth and fifth lumbar vertebrae received three-dimensional reconstruction, and the operation was simulated using digital technology to achieve optimal placement. After simulation, the angle of pedicle screw was measured. The angle of the planes of the midline of the screw and the midline of the spine served as coronal angle. The angle of the planes of the midline of the screw and the upper surface of the vertebral body served as sagittal angle. RESULTS AND CONCLUSION:Measure results suggest that each angle was bigger than the angle in previous studies, which might be induced by different reference markers. Standard deviation of each angle was also big. These findings verify that the anatomical differences of pedicles were apparent. Thus, we should insert the pedicle screws individual y. Method of locating reference using anatomic landmarks of a single vertebral body can maximize to avoid interference posture. The combination with preoperative three-dimensional reconstruction is more in line with the requirements of pedicle screw, and can effectively improve the accuracy of pedicle screws.