Comparison of Dental Stone Models and Their 3D Printed Acrylic Replicas for the Accuracy and Mechanical Properties
Marta Czajkowska,
Ewa Walejewska,
Łukasz Zadrożny,
Monika Wieczorek,
Wojciech Święszkowski,
Leopold Wagner,
Eitan Mijiritsky,
Jarosław Markowski
Affiliations
Marta Czajkowska
Laryngology Department, School of Medicine in Katowice, Medical University of Silesia in Katowice, 40-027 Katowice, Poland
Ewa Walejewska
Faculty of Materials Science and Engineering, Warsaw University of Technology, 02-507 Warsaw, Poland
Łukasz Zadrożny
Department of Dental Propaedeutics and Prophylaxis, Medical University of Warsaw, 02-006 Warsaw, Poland
Monika Wieczorek
Faculty of Materials Science and Engineering, Warsaw University of Technology, 02-507 Warsaw, Poland
Wojciech Święszkowski
Faculty of Materials Science and Engineering, Warsaw University of Technology, 02-507 Warsaw, Poland
Leopold Wagner
Department of Dental Propaedeutics and Prophylaxis, Medical University of Warsaw, 02-006 Warsaw, Poland
Eitan Mijiritsky
Department of Otolaryngology, Head and Neck and Maxillofacial Surgery, Tel-Aviv Sourasky Medical Center, Sackler Faculty of Medicine, Tel-Aviv 6139001, Israel
Jarosław Markowski
Laryngology Department, School of Medicine in Katowice, Medical University of Silesia in Katowice, 40-027 Katowice, Poland
This study was conducted to test possibilities of application of 3D printed dental models (DMs) in terms of their accuracy and physical properties. In this work, stone models of mandibles were cast from alginate impressions of 10 patients and scanned in order to obtain 3D printed acrylic replicas. The diagnostic value was tested as matching of model scans on three levels: peak of cusps, occlusal surface, and all teeth surfaces. The mechanical properties of acrylic and stone samples, specifically the impact strength, shore D hardness, and flexural and compressive strength were investigated according to ISO standards. The matching of models’ surfaces was the highest on the level of peaks of cusps (average lack of deviations, 0.21 mm) and the lowest on the level of all teeth surfaces (average lack of deviations, 0.64 mm). Acrylic samples subjected to mechanical testing, as expected, showed higher mechanical properties as compared to the specimens made of dental stone. In the present study we demonstrated that 3D printed acrylic models could be ideal representatives in the case of use as a diagnostic tool and as a part of medical records. The acrylic samples exhibited not only higher mechanical properties, but also showed better accuracy comparing to dental stone.
