Accuracy of Master Casts Generated Using Conventional and Digital Impression Modalities: Part 2—The Full Arch Dimension

Applied Sciences

Hosain Al-Mansour¹  Maryam Hassan Mugri²  Nasser M. Alqahtani³  Saurabh Jain⁴  Fatimah H. Alsurayyie⁴  Mohammed E. Sayed⁴  Fuad Al-Sanabani⁴  Bandar M. A. Al-Makramani⁴  Fawzia Ibraheem Shaabi⁴  Abdulkarim Hussain Alshehri⁴  Walaa Magdy Ahmed⁵  Yasir Yahya Akkam⁶  Hanan Ibrahim Hakami⁷  Dalea Mohammed Bukhary⁸ 

[1] Department of Dental Implant, Riyadh Dental Center, King Saud Medical City, Riyadh 12746, Saudi Arabia;Department of Maxillofacial Surgery and Diagnostic Sciences, College of Dentistry, Jazan University, Jazan 45142, Saudi Arabia;Department of Prosthetic Dental Science, College of Dentistry, King Khalid University, Abha 61413, Saudi Arabia;Department of Prosthetic Dental Sciences, College of Dentistry, Jazan University, Jazan 45142, Saudi Arabia;Department of Restorative and Aesthetic Dentistry, Faculty of Dentistry, King Abdulaziz University, Jeddah 21589, Saudi Arabia;Isawiyah General Hospital, Qurayat 77413, Saudi Arabia;Ministry of Health, Jazan 45142, Saudi Arabia;Oral and Maxillofacial Prosthodontics Department, Faculty of Dentistry, King Abdulaziz University, Jeddah 21589, Saudi Arabia;

关键词: accuracy;    alginate;    impression;    intraoral scanner;    polyvinyl siloxane;    digital impression;   

DOI  :  10.3390/app12042148

来源: DOAJ

【 摘 要 】

The aim of this study was to evaluate the accuracy of master casts generated by conventional (putty and light body consistencies polyvinyl siloxane and alginate) and digital impression techniques on a typodont master model with full-arch-prepared abutment teeth. The null hypotheses tested were as follows: (1) no statistically significant differences in accuracy between casts made by the two impression modalities and the typodont master model at each of the four locations (horizontal straight, horizontal curved, horizontal cross arch, and vertical), and (2) no statistically significant differences in dimensions measured at each of the four locations between the casts generated using the conventional and digital impression techniques. For the conventional technique, 10 impressions each were made for the typodont model using polyvinyl siloxane and alginate impression materials, and the casts were poured. For the digital technique, the typodont model was scanned 10 times using a TRIOS-3 3Shape intraoral scanner, and the casts were printed. The measurements for the horizontal (anteroposterior and cross arch) and vertical dimensions were made using a stereomicroscope and the accuracy of fabricated casts was expressed as the percentage of deviation from the typodont master model’s values. A one-way ANOVA and Tukey’s test (p < 0.05) were used to analyze the data. In the current study, the only measurement that did not exceed 0.5% in dimensional change was with the stone casts produced by both the 3M ESPE PVS and Kromopan alginate impression materials at the HAPC dimension. The casts generated by impressions made using the 3M ESPE PVS impression material were the most accurate, whereas the casts generated by making digital impressions using the TRIOS-3 3Shape intraoral scanner were the least accurate among the three tested groups. The greatest number of distortions above 0.5% (at all dimensional locations) was produced by the digital models printed using the ASIGA 3D printer.

【 授权许可】

Unknown