Sanda Koma, Yasunami Noriyuki, Okada Maki, Furuhashi Akihiro, Ayukawa Yasunori
Section of Implant & Rehabilitative Dentistry, Division of Oral Rehabilitation, Faculty of Dental Science, Kyushu University, Fukuoka 812-8582, Japan.
Department of Medical Technology, Kyushu University Hospital, Fukuoka 812-8582, Japan.
Materials (Basel). 2021 Oct 29;14(21):6489. doi: 10.3390/ma14216489.
When taking the final impression for a three-unit fixed partial denture (FPD), the intaglio surface of the pontic of provisional restoration cannot be transferred accurately to that of definitive restoration. The intra- and extra-oral scanning (IEOS) technique, a method for accurately reproducing the submucosal morphology of the superstructure of an implant, has been reported using an intraoral scanner. In the present study, we evaluated the difference between the conventional impression method using impression material and the IEOS technique in reproducing the morphology of the surface of the pontic of a definitive FPD. There was a significant difference in the trueness of the intaglio surface morphology of the pontic between the conventional method and the IEOS technique; however, no significant difference in precision was observed. As a result, the intaglio surface of the pontic of the three-unit FPD could be transferred to definitive restorations more accurately with the IEOS technique than with the conventional method. These results suggest that the IEOS technique can duplicate the intaglio surface of the pontic more reproducibly to the definitive restorations compared with the conventional method.
在制取三单位固定局部义齿（FPD）的终印模时，临时修复体桥体的组织面不能准确转移至最终修复体的组织面。口内和口外扫描（IEOS）技术是一种使用口内扫描仪精确再现种植体上部结构黏膜下形态的方法。在本研究中，我们评估了使用印模材料的传统印模方法与IEOS技术在再现最终FPD桥体表面形态方面的差异。传统方法与IEOS技术在桥体组织面形态的准确性方面存在显著差异；然而，在精确性方面未观察到显著差异。结果，与传统方法相比，使用IEOS技术可以更准确地将三单位FPD桥体的组织面转移至最终修复体。这些结果表明，与传统方法相比，IEOS技术能够更可重复地将桥体的组织面复制到最终修复体上。
