Alternative Title印象体の直接光学計測によるCAD/CAMクラウンの適合精度
Note (General)CAD/CAM crowns are generally fabricated by laboratory optical scanning of the definitive cast to obtain the morphology of the dentition and abutment tooth. This method requires skilled operations for making the stone cast and mounting it on an articulator. Laboratory scanners using the blue light-emitting diode (LED) have been developed that can measure both the stone cast and dental impression with high speed and precision. They can measure dental impressions even with deep and narrow shapes quickly and reliably. When fabricating CAD/CAM crowns based on the direct measurements of triple impressions using these laboratory scanners, there is no need to produce a definitive cast and mount it on an articulator. Consequently, errors caused by stone expansion and cast mounting are eliminated. However, there are no reports on the fitting accuracy of CAD/CAM crowns fabricated using direct triple impression measurements. The purpose of this study was to evaluate the fitting accuracy of composite resin CAD/CAM crowns fabricated from the laboratory scanning of silicone impressions (SI). Twelve CAD/CAM crowns each were fabricated for a maxillary left central incisor and a mandibular right first molar from SI and conventional definitive casts (DC). The fitting gaps of the incisal edge or occlusal surface, axial surface, and marginal regions were measured. The paired t-test was used for statistical comparison. No significant differences were observed in the fitting accuracy between the crowns fabricated using CAD/CAM from DC and those from SI in any part of the abutment teeth (p ＞ 0.05). These results indicate that there are no issues concerning the clinical application of CAD/CAM crowns fabricated from SI scans.
2019年度
Collection (particular)国立国会図書館デジタルコレクション > デジタル化資料 > 博士論文
Date Accepted (W3CDTF)2022-02-06T04:33:19+09:00
Data Provider (Database)国立国会図書館 : 国立国会図書館デジタルコレクション