Effect of abutment tooth location on the accuracy of digital impressions obtained using an intraoral scanner for removable partial dentures
Kazuki Sakamoto, Junichiro Wada, Yuki Arai, Hironari Hayama, Yurika Ishioka, Eung-Yeol Kim, Ryunosuke Kazama, Yusuke Toyoshima, Noriyuki Wakabayashi
Abstract
PURPOSE: To verify the effect of abutment tooth location on the accuracy of digital impressions obtained using an intraoral scanner (IOS) for removable partial dentures (RPDs). METHODS: ) of an individual tooth, and dimensional accuracy (coordinate and linear accuracy) of the IOS data of the target abutment teeth were compared (α=0.05). RESULTS: (P<0.01), and mesial coordinate displacement (P<0.01 and P<0.05 in class II and III models, respectively). Intra-model comparisons showed that #45 in the class II model and #47 in the class III model had significantly inferior linear accuracy (P<0.05 and P<0.01, respectively) and buccal coordinate displacement (P<0.05 and P<0.01, respectively) compared with the other target teeth. CONCLUSIONS: In digital impressions of RPDs, isolation of abutment teeth by mucosal areas can reduce general trueness based on the entire dental arch and mesial tooth displacement, whereas increased distance from the scanning origin can adversely affect local trueness and dimensional accuracy.