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Proceedings Paper

The effect of the abutment occlusal convergence angles on the accuracy of digital and conventional impressions
Author(s): Anca Jivanescu; Raul Rotar; Andrei Gavrilovici; Cristiana Pricop; Luciana Goguta
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Paper Abstract

Digital impressions were introduced in order to overcome some inconveniences related to conventional impression materials.The aim of this in vitro study is to determine and evaluate the way the abutment geometry influences the accuracy of both, digital and conventional impressions. Crown preparations with occlusal convergence angles (0,6,10 and 20 degrees) were created from 4 resin maxillary right incisors.Each preparation was scanned using a high resolution scanner (reference scanner) and saved in stereolithography (STL) format. Then the prepared resin teeth were scanned (PlanScan group) using an intraoral scanner and saved in STL format as well.A number of three conventional polyvinyl siloxane (PVS) impressions were made from each preparation, which were poured with Type IV dental stone and scanned using the same intraoral scanner (PVS group). All STL files were compared using metrology software (Geomagic Studio 2013), in terms of trueness and precision. Based on the findings in this study, it may be concluded that the accuracy of digital impressions is superior to conventional methods, but the difference between them is not significant.

Paper Details

Date Published: 10 August 2018
PDF: 8 pages
Proc. SPIE 10831, Seventh International Conference on Lasers in Medicine, 1083106 (10 August 2018); doi: 10.1117/12.2280203
Show Author Affiliations
Anca Jivanescu, Univ. of Medicine and Pharmacy Victor Babes Timisoara (Romania)
Raul Rotar, Univ. of Medicine and Pharmacy Victor Babes Timisoara (Romania)
Andrei Gavrilovici, Univ. of Medicine and Pharmacy Victor Babes Timisoara (Romania)
Cristiana Pricop, Univ. of Medicine and Pharmacy Victor Babes Timisoara (Romania)
Luciana Goguta, Univ. of Medicine and Pharmacy Victor Babes Timisoara (Romania)


Published in SPIE Proceedings Vol. 10831:
Seventh International Conference on Lasers in Medicine
Carmen Todea M.D.; Adrian Podoleanu; Virgil-Florin Duma, Editor(s)

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