Angle Orthod. 2023 Jan 1;93(1):79-87. doi: 10.2319/011722-55.1.
To investigate and compare the transfer accuracy of five different surgical guides (SGs) for the insertion of orthodontic mini-implants (OMIs) in the anterior palate.
Stereolithographic files of 10 maxillary patient models and their corresponding lateral cephalograms were virtually matched and used for planning the position of two parallel OMIs in the paramedian region of the anterior palate. For each patient model, three 3-dimensional (3D)-printed and two conventional SGs were manufactured from different materials, and a total of 96 OMIs were transferred to the anterior palates of the respective 50 molded resin models. The planned (T0) and the actual (T1) OMI positions were analyzed and compared after superimposition of the digitized models. The deviations between the OMI positions in T0 and T1 were described as the distance between the head and the tip, respectively, of each OMI in millimeters and the deviating angle between the OMI axes for each patient and SG.
The conventionally manufactured SGs of Pattern Resin LS (GC Europe N.V., Leuven, Belgium) showed the highest linear and angular transfer accuracy for the insertion of OMIs. The highest deviations were found with the SGs made of IMPRIMO LC Splint (3D-printed; Scheu-Dental, Iserlohn, Germany) and Memosil 2 (conventional SG; Kulzer, Hanau, Germany).
The 3D-printed SGs did not reach the accuracy of the conventional SGs made of Pattern Resin but may provide sufficient accuracy for palatal OMI placement.
研究并比较 5 种不同的外科导板（SGs）在前 palate 中植入正畸微型种植体（OMIs）的转移精度。
通过虚拟匹配 10 个上颌患者模型的立体光刻文件及其相应的侧位头颅侧位片，用于在前 palate 的正中区域规划两个平行 OMIs 的位置。对于每个患者模型，使用不同材料制造了 3 个 3D 打印和 2 个传统 SG，并将总共 96 个 OMIs 转移到相应的 50 个模制树脂模型的前 palate 上。在数字化模型叠加后，分析和比较计划（T0）和实际（T1）OMI 位置。将 T0 和 T1 中 OMI 位置之间的偏差分别描述为每个 OMI 的头部和尖端之间的距离（以毫米为单位）以及每个患者和 SG 的 OMI 轴之间的偏差角度。
Pattern Resin LS（GC Europe N.V.，Leuven，比利时）制造的传统 SG 显示出插入 OMIs 的最高线性和角度转移精度。IMPIRIMO LC Splint（3D 打印；Scheu-Dental，Iserlohn，德国）和 Memosil 2（传统 SG；Kulzer，Hanau，德国）制造的 SG 出现了最高的偏差。
3D 打印的 SG 没有达到 Pattern Resin 制成的传统 SG 的精度，但可能为 palatal OMI 放置提供足够的精度。
