Abstract：
This study aimed to design a new surgical guide for controlling the mesiodistal distance between implant osteotomies and adjacent teeth as well as the osteotomy depth in partially edentulous patients. The guide kit was designed with design software and milled with a CNC (computer numerical control) router. The guide consisted of 2 components-stoppers and crown guides-for determining the drilling depth and mesiodistal position, respectively. The stoppers were designed in 7.5-, 9.5-, and 11.5-mm lengths, and the crown guides were fabricated with outer diameters of 5.0, 6.0, 7.0, and 8.0 mm. The accuracy of the guide was assessed by preparing a total of 20 implant osteotomies in 4 partially edentulous models and comparing the dimensions of the actual osteotomies to the values that were predicted to occur with the use of the surgical guides. Osteotomies were prepared using the 7.5-mm stopper with either the 7.0- or 8.0-mm crown guide. Cone beam computed tomography (CBCT) was used to obtain images for analysis of osteotomy-tooth mesiodistal distances, which were predicted to be 3.0 or 5.5 mm, depending on position; interosteotomy mesiodistal distances, which were predicted to be 3.0 mm; and osteotomy depth, which was predicted to be 11.5 mm. A 1-sample t test was used to determine if there were significant differences between the predicted values and the measurements of the guided osteotomies on the CBCT images of the mandibular models, and an independent t test was conducted to compare the results of 3.0- and 5.5-mm osteotomy-tooth distances (α = 0.05). Differences between the predicted and actual values of the interosteotomy mesiodistal distance (P = 0.516) and osteotomy depth (P = 0.847) were not statistically significant. The actual osteotomy-tooth mesiodistal distances were significantly different from the predicted values of 3.0 (P = 0.000) and 5.5 mm (P = 0.001), with higher mean differences of 0.46 and 0.60 mm, respectively. The designed guide had a high accuracy in achieving optimal linear interosteotomy mesiodistal distances and osteotomy depths, and the obtained mean values were clinically acceptable.
摘要：
这项研究旨在设计一种新的手术指南，用于控制部分缺牙患者的植入物截骨术与相邻牙齿之间的近远端距离以及截骨深度。指南套件采用设计软件进行设计，并用CNC（计算机数控）路由器进行铣削。导向器由2个部件-塞子和冠状导向器-用于确定钻孔深度和中远端位置。分别。塞子是在7.5-中设计的，9.5-,和11.5毫米的长度，并且冠状引导件被制造成具有5.0、6.0、7.0和8.0mm的外径。通过在4个部分缺牙模型中准备总共20个植入物截骨术并将实际截骨术的尺寸与使用手术引导器预测的值进行比较来评估引导器的准确性。使用7.5毫米塞子和7.0毫米或8.0毫米牙冠导向器进行截骨术。锥形束计算机断层扫描（CBCT）用于获取图像，以分析截骨-牙齿中远侧距离，预计为3.0或5.5毫米，取决于位置；骨间切开术中远端距离，预计为3.0毫米；截骨深度，预计为11.5毫米。1样本t检验用于确定下颌骨模型的CBCT图像上的预测值与引导截骨术的测量值之间是否存在显着差异，并进行独立t检验以比较3.0和5.5mm截骨-牙齿距离的结果（α=0.05）。截骨间近远端距离（P=0.516）和截骨深度（P=0.847）的预测值与实际值之间的差异无统计学意义。实际截骨-牙齿近端距离与预测值3.0(P=0.000)和5.5mm(P=0.001)有显著差异,具有较高的0.46和0.60mm的平均差异，分别。设计的导向器在实现最佳线性截骨间近远距离和截骨深度方面具有很高的准确性。获得的平均值是临床上可接受的。
