Abstract：
BACKGROUND: Tooth-supported surgical guides have demonstrated superior accuracy compared with bone-supported guides. This study aimed to modify the fabrication of tooth-supported guides for compatibility with tumor resection procedures and investigate their accuracy.
METHODS: Patients with tumors who underwent osteotomy with the assistance of modified tooth- or bone-supported surgical guides were included. Virtual surgical planning (VSP) was employed to align three dimensional (3D) models extracted from intraoperative computed tomography (CT) images. The distances and angular deviations between the actual osteotomy plane and preoperative plane were recorded. A comparative analysis of osteotomy discrepancies between tooth-supported and bone-supported guides, as well as among tooth-supported guides based on CT, cone-beam CT (CBCT), or intraoral scanner (IOS) was conducted. The factors influencing the precision of the guides were analyzed.
RESULTS: Sixty patients with 81 resection planes were included in this study. In the tooth-supported group, the mean deviations in the osteotomy plane and angle were 1.39 mm and 4.30°, respectively, whereas those of the bone-supported group were 2.16 mm and 4.95°. In the tooth-supported isotype guide groups, the mean deviations of the osteotomy plane were 1.39 mm, 1.47 mm, 1.23 mm across CT, CBCT, and IOS, respectively. The accuracy of the modified tooth-supported guides remained consistent regardless of number and position of the teeth supporting the guide and location of the osteotomy lines.
CONCLUSIONS: The findings indicate that the modified tooth-supported surgical guides demonstrated high accuracy in the maxillofacial region, contributing to a reduction in the amount of surgically detached soft tissue.
METHODS: Patients with tumors who underwent osteotomy with the assistance of modified tooth- or bone-supported surgical guides were included. Virtual surgical planning (VSP) was employed to align three dimensional (3D) models extracted from intraoperative computed tomography (CT) images. The distances and angular deviations between the actual osteotomy plane and preoperative plane were recorded. A comparative analysis of osteotomy discrepancies between tooth-supported and bone-supported guides, as well as among tooth-supported guides based on CT, cone-beam CT (CBCT), or intraoral scanner (IOS) was conducted. The factors influencing the precision of the guides were analyzed.
RESULTS: Sixty patients with 81 resection planes were included in this study. In the tooth-supported group, the mean deviations in the osteotomy plane and angle were 1.39 mm and 4.30°, respectively, whereas those of the bone-supported group were 2.16 mm and 4.95°. In the tooth-supported isotype guide groups, the mean deviations of the osteotomy plane were 1.39 mm, 1.47 mm, 1.23 mm across CT, CBCT, and IOS, respectively. The accuracy of the modified tooth-supported guides remained consistent regardless of number and position of the teeth supporting the guide and location of the osteotomy lines.
CONCLUSIONS: The findings indicate that the modified tooth-supported surgical guides demonstrated high accuracy in the maxillofacial region, contributing to a reduction in the amount of surgically detached soft tissue.
摘要：
背景：与骨支撑引导件相比，牙齿支撑式手术引导件具有更高的准确性。这项研究旨在修改牙齿支撑导向器的制造，以与肿瘤切除程序兼容，并研究其准确性。
方法：包括在改良的牙支撑或骨支撑手术导管辅助下进行截骨的肿瘤患者。采用虚拟手术计划（VSP）来对齐从术中计算机断层扫描（CT）图像提取的三维（3D）模型。记录实际截骨平面与术前平面之间的距离和角度偏差。牙齿支撑和骨支撑导向之间截骨差异的比较分析，以及基于CT的牙齿支撑导向器，锥束CT(CBCT),或口内扫描仪（IOS）进行。分析了影响导轨精度的因素。
结果：本研究包括60例81个切除平面的患者。在牙齿支撑组中，截骨平面和角度的平均偏差为1.39mm和4.30°，分别,而骨支撑组为2.16mm和4.95°。在牙齿支持的同种型指南组中，截骨平面的平均偏差为1.39mm，1.47mm,1.23mm跨CT，CBCT,和IOS,分别。无论支撑引导件的牙齿的数量和位置以及截骨线的位置如何，改良的牙齿支撑引导件的准确性保持一致。
结论：研究结果表明，改良的牙齿支撑式手术导向器在颌面部区域表现出很高的准确性，有助于减少手术分离的软组织的数量。
方法：包括在改良的牙支撑或骨支撑手术导管辅助下进行截骨的肿瘤患者。采用虚拟手术计划（VSP）来对齐从术中计算机断层扫描（CT）图像提取的三维（3D）模型。记录实际截骨平面与术前平面之间的距离和角度偏差。牙齿支撑和骨支撑导向之间截骨差异的比较分析，以及基于CT的牙齿支撑导向器，锥束CT(CBCT),或口内扫描仪（IOS）进行。分析了影响导轨精度的因素。
结果：本研究包括60例81个切除平面的患者。在牙齿支撑组中，截骨平面和角度的平均偏差为1.39mm和4.30°，分别,而骨支撑组为2.16mm和4.95°。在牙齿支持的同种型指南组中，截骨平面的平均偏差为1.39mm，1.47mm,1.23mm跨CT，CBCT,和IOS,分别。无论支撑引导件的牙齿的数量和位置以及截骨线的位置如何，改良的牙齿支撑引导件的准确性保持一致。
结论：研究结果表明，改良的牙齿支撑式手术导向器在颌面部区域表现出很高的准确性，有助于减少手术分离的软组织的数量。
