D'haese Rani, Vrombaut Tom, Hommez Geert, De Bruyn Hugo, Vandeweghe Stefan
Oral Health Sciences, Faculty of Medicine and Health Sciences, Ghent University, 9000 Ghent, Belgium.
Dental Faculty, Radboud University Medical Hospital, 6525 GA Nijmegen, The Netherlands.
J Clin Med. 2021 Jan 20;10(3):391. doi: 10.3390/jcm10030391.
The aim of this in vitro study is to evaluate the accuracy of implant position using mucosal supported surgical guides, produced by a desktop 3D printer.
Ninety implants (Bone Level Roxolid, 4.1 mm × 10 mm, Straumann, Villerat, Switzerland) were placed in fifteen mandibular casts (Bonemodels, Castellón de la Plana, Spain). A mucosa-supported guide was designed and printed for each of the fifteen casts. After placement of the implants, the location was assessed by scanning the cast and scan bodies with an intra-oral scanner (Primescan, Dentsply Sirona, York, PA, USA). Two comparisons were performed: one with the mucosa as a reference, and one where only the implants were aligned. Angular, coronal and apical deviations were measured.
The mean implant angular deviation for tissue and implant alignment were 3.25° (SD 1.69°) and 2.39° (SD 1.42°) respectively, the coronal deviation 0.82 mm (SD 0.43 mm) and 0.45 mm (SD 0.31 mm) and the apical deviation 0.99 mm (SD 0.45 mm) and 0.71 mm (SD 0.43 mm). All three variables were significantly different between the tissue and implant alignment ( < 0.001).
Based on the results of this study, we conclude that guided implant surgery using desktop 3D printed mucosa-supported guides has a clinically acceptable level of accuracy. The resilience of the mucosa has a negative effect on the guide stability and increases the deviation in implant position.
本体外研究旨在评估使用桌面3D打印机制作的黏膜支持式手术导板时种植体位置的准确性。
将90颗种植体（骨水平Roxolid，4.1毫米×10毫米，士卓曼，瑞士维勒拉特）植入15个下颌模型（BoneModels，西班牙卡斯特利翁德拉普拉纳）。为这15个模型分别设计并打印了一个黏膜支持式导板。植入种植体后，使用口腔内扫描仪（Primescan，登士柏西诺德，美国宾夕法尼亚州约克）对模型和扫描体进行扫描，以评估种植体位置。进行了两项比较：一项以黏膜为参考，另一项仅使种植体对齐。测量了角度、冠向和根尖向偏差。
组织对齐和种植体对齐时种植体的平均角度偏差分别为3.25°（标准差1.69°）和2.39°（标准差1.42°），冠向偏差分别为0.82毫米（标准差0.43毫米）和0.45毫米（标准差0.31毫米），根尖向偏差分别为0.99毫米（标准差0.45毫米）和0.71毫米（标准差0.43毫米）。组织对齐和种植体对齐之间的所有三个变量均存在显著差异（<0.001）。
基于本研究结果，我们得出结论，使用桌面3D打印的黏膜支持式导板进行引导种植手术具有临床上可接受的准确性水平。黏膜的弹性对导板稳定性有负面影响，并增加种植体位置的偏差。
