Former Resident, Advanced Prosthodontics Program, The Ohio State University College of Dentistry, Columbus, Dublin, Ohio.
Department of Prosthodontics, Istanbul Okan University Faculty of Dentistry, Istanbul, Turkey.
Clin Implant Dent Relat Res. 2019 Oct;21(5):987-994. doi: 10.1111/cid.12821. Epub 2019 Jul 25.
Whether stitching the palate during intraoral digital scans of implants would improve, scanning accuracy is unclear.
Evaluate the effect of stitching the palate and the scan body position on the trueness (distance and angular deviation) and precision of digital scans in a completely edentulous situation.
An edentulous maxillary model with four parallel dental implant analogs was fabricated and intraoral scan bodies were attached. The entire surface was scanned using an industrial scanner to generate a master reference model digital scan (MRM-DS). Digital scans of the master model were made using an intraoral scanner and the resulting scans were divided into two groups [stitched palate (S) and unstitched palate (U)]. All test scans were converted to STL files and superimposed over the MRM-DS.
For trueness, scan body position had a significant effect on distance (P < .001) and angular (P < .001) deviation values. In terms of precision, no significant difference was found in distance (P = .051) and angular deviations (P = .36) between stitched and unstitched techniques.
The accuracy and precision of digital scans of edentulous maxillary arch was similar independent of stitching or unstitching the palate. Position of the implant had a significant effect on trueness.
在种植体的口腔内数字扫描中缝合腭部是否会提高扫描精度尚不清楚。
评估在完全无牙情况下缝合腭部和扫描体位置对数字扫描准确性（距离和角度偏差）和精密度的影响。
制作一个带有四个平行种植体模拟体的无牙上颌模型，并附着口腔内扫描体。使用工业扫描仪对整个表面进行扫描，生成主参考模型数字扫描（MRM-DS）。使用口腔内扫描仪对主模型进行数字扫描，将生成的扫描分为两组[缝合腭部（S）和未缝合腭部（U）]。所有测试扫描均转换为 STL 文件，并与 MRM-DS 叠加。
在准确性方面，扫描体位置对距离（P < .001）和角度（P < .001）偏差值有显著影响。在精密度方面，缝合和未缝合技术之间在距离（P =.051）和角度偏差（P =.36）方面均无显著差异。
无论缝合或不缝合腭部，无牙上颌弓的数字扫描的准确性和精密度相似。种植体的位置对准确性有显著影响。
