Research Papers: Therapeutic

Micrometric precision of prosthetic dental crowns obtained by optical scanning and computer-aided designing/computer-aided manufacturing system

[+] Author Affiliations
Flávio Domingues das Neves

Federal University of Uberlândia, Department of Occlusion, Fixed Prostheses and Dental Materials, Av. Pará, 1720, Bloco 4LA sala 4LA-42, Campus Umuarama, 38405-320, Uberlândia, Minas Gerais, Brazil

Thiago de Almeida Prado Naves Carneiro

Federal University of Uberlândia, Department of Occlusion, Fixed Prostheses and Dental Materials, Av. Pará, 1720, Bloco 4LA sala 4LA-42, Campus Umuarama, 38405-320, Uberlândia, Minas Gerais, Brazil

Célio Jesus do Prado

Federal University of Uberlândia, Department of Occlusion, Fixed Prostheses and Dental Materials, Av. Pará, 1720, Bloco 4LA sala 4LA-42, Campus Umuarama, 38405-320, Uberlândia, Minas Gerais, Brazil

Marcel Santana Prudente

Federal University of Uberlândia, Department of Occlusion, Fixed Prostheses and Dental Materials, Av. Pará, 1720, Bloco 4LA sala 4LA-42, Campus Umuarama, 38405-320, Uberlândia, Minas Gerais, Brazil

Karla Zancopé

Federal University of Uberlândia, Department of Occlusion, Fixed Prostheses and Dental Materials, Av. Pará, 1720, Bloco 4LA sala 4LA-42, Campus Umuarama, 38405-320, Uberlândia, Minas Gerais, Brazil

Letícia Resende Davi

Federal University of Uberlândia, Department of Occlusion, Fixed Prostheses and Dental Materials, Av. Pará, 1720, Bloco 4LA sala 4LA-42, Campus Umuarama, 38405-320, Uberlândia, Minas Gerais, Brazil

Gustavo Mendonça

University of Michigan, School of Dentistry, Department of Biologic and Material Sciences, Division of Prosthodontics, 1011 N. University, Ann Arbor, Michigan 48109-1078, United States

Carlos José Soares

Federal University of Uberlândia, Department of Operative Dentistry and Dental Materials, Av. Pará, 1720, Bloco 4LA sala 4LA-42, Campus Umuarama, 38405-320, Uberlândia, Minas Gerais, Brazil

J. Biomed. Opt. 19(8), 088003 (Aug 11, 2014). doi:10.1117/1.JBO.19.8.088003
History: Received March 30, 2014; Revised June 23, 2014; Accepted July 14, 2014
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Abstract.  The current study evaluated prosthetic dental crowns obtained by optical scanning and a computer-aided designing/computer-aided manufacturing system using micro-computed tomography to compare the marginal fit. The virtual models were obtained with four different scanning surfaces: typodont (T), regular impressions (RI), master casts (MC), and powdered master casts (PMC). Five virtual models were obtained for each group. For each model, a crown was designed on the software and milled from feldspathic ceramic blocks. Micro-CT images were obtained for marginal gap measurements and the data were statistically analyzed by one-way analysis of variance followed by Tukey’s test. The mean vertical misfit was T=62.6±65.2μm; MC=60.4±38.4μm; PMC=58.1±38.0μm, and RI=89.8±62.8μm. Considering a percentage of vertical marginal gap of up to 75μm, the results were T=71.5%, RI=49.2%, MC=69.6%, and PMC=71.2%. The percentages of horizontal overextension were T=8.5%, RI=0%, MC=0.8%, and PMC=3.8%. Based on the results, virtual model acquisition by scanning the typodont (simulated mouth) or MC, with or without powder, showed acceptable values for the marginal gap. The higher result of marginal gap of the RI group suggests that it is preferable to scan this directly from the mouth or from MC.

Figures in this Article
© 2014 Society of Photo-Optical Instrumentation Engineers

Citation

Flávio Domingues das Neves ; Thiago de Almeida Prado Naves Carneiro ; Célio Jesus do Prado ; Marcel Santana Prudente ; Karla Zancopé, et al.
"Micrometric precision of prosthetic dental crowns obtained by optical scanning and computer-aided designing/computer-aided manufacturing system", J. Biomed. Opt. 19(8), 088003 (Aug 11, 2014). ; http://dx.doi.org/10.1117/1.JBO.19.8.088003


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