CAD-CAM systems: precision evaluation of data acquisition and milling equipment

• Grant number: 11/19150-7
• Support Opportunities: Regular Research Grants
• Start date: February 01, 2012
• End date: January 31, 2014
• Field of knowledge: Health Sciences - Dentistry - Dental Materials
• Principal Investigator: Eduardo Piza Pellizzer
• Grantee: Eduardo Piza Pellizzer
• Host Institution: Faculdade de Odontologia (FOA). Universidade Estadual Paulista (UNESP). Campus de Araçatuba. Araçatuba , SP, Brazil
• Associated researchers: Graziela Avila Galhano Logar

Abstract

Objective: 1. Evaluate the influence of three data acquisition system on the marginal fit of CAD-CAM-made crown and bridge cores: a) iTero intra-oral system; b) Cerec BlueCam intra-oral system; c) conventional optic scanner; and 2. Evaluate the accuracy of cores milled in two different equipments: a) Sistema Conexao; b) Cerec InLab. Methodology: A stainless-steel master die will be made, to simulate a three elements bridge. Two external hexagon implants (platform 4.1mm from Conexao) will be place in an epoxy block, simulating a clinical situation of three elements. A PVS impression will be taken of each system and, from them, stone dies. The prep dimensions of the two systems will be transferred to the software as follow (n=10): 1) Direct digital impression using iTero (cadent); 2) Direct digital impression using Cerec BluCam (Sirona); and 3) Scanning of the cast by optical scanner 3s (DWOS). Ten files will be obtained for each system (prep profile and implant position). The DWOS software will be used to design 60 structures prototypes (30 for each condition). The structures will be milled by Conexao CAD/CAM system and the Cerec BlueCam impression will be sent to Cerec InLab for milling. The cores for the teeth-supported bridges will be milled in Zirconia blocks, and the cores for implant -supported bridges will be milled in Cr-CO alloy. The control group will include 10 conventional structures using UCLA abutment with CR-CO belt for the implant-supported system and 10 Ni-Cr structures conventionally made for the teeth-supported system. The marginal gap of 90 structures will be measured in 12 points using a tridimensional optic microscope (Roi, RAM Optical Instrumentation, CA 92606, Irvine) with a digital stage, 250x and 1 ¼m accuracy. After that, the structures will be sectioned in the connection point and the single-crown core marginal gap will be measured. The statistically significant difference, over the initial hypothesis of similarity will be tested by ANOVA . Tukey test will be use to check the interaction of the results, complemented by graphs of the means. (AU)

Scientific publications

(7)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

MELLO, CAROLINE CANTIERI; ARAUJO LEMOS, CLEIDIEL APARECIDO; DE LUNA GOMES, JESSICA MARCELA; VERRI, FELLIPPO RAMOS; PELLIZZER, EDUARDO PIZA. CAD/CAM vs Conventional Technique for Fabrication of Implant-Supported Frameworks: A Systematic Review and Meta-Analysis of In Vitro Studies. International Journal of Prosthodontics, v. 32, n. 2, p. 182-192, MAR-APR 2019. (11/19150-7)

MELLO, CAROLINE C.; SANTIAGO JUNIOR, JOEL F.; LEMOS, CLEIDIEL A. A.; GALHANO, GRAZIELLA A.; EVANGELISTI, EDOARDO; SCOTTI, ROBERTO; VERRI, FELLIPPO R.; PELLIZZER, EDUARDO P.. Evaluation of the accuracy and stress distribution of 3-unit implant supported prostheses obtained by different manufacturing methods. Materials Science & Engineering C-Materials for Biological Applications, v. 102, p. 66-74, SEP 2019. (11/19150-7, 09/16164-7)

JÉSSICA MARCELA DE LUNA GOMES; SANDRA LÚCIA DANTAS DE MORAES; CLEIDIEL APARECIDO ARAUJO LEMOS; RONALDO SILVA CRUZ; HISKELL FRANCINE FERNANDES E OLIVEIRA; EDUARDO PIZA PELLIZZER. Systematic review and meta-analysis of welding procedures in one-piece cast implant-supported frameworks. Brazilian Oral Research, v. 33, 2019-11-25. (11/19150-7)

DE LUNA GOMES, JESSICA MARCELA; DANTAS DE MORAES, SANDRA LUCIA; SANTIAGO JUNIOR, JOEL FERREIRA; ARAUJO LEMOS, CLEIDIEL APARECIDO; GROSSI, MARCIO LIMA; PELLIZZER, EDUARDO PIZA. Evaluation of Marginal Misfit of Implant-Supported Fixed Prostheses Made Using Different Techniques. International Journal of Prosthodontics, v. 32, n. 4, p. 345-348, JUL-AUG 2019. (11/19150-7)

EDUARDO PIZA PELLIZZER1; CAROLINE CANTIERI DE MELLO; JÉSSICA MARCELA DE LUNA GOMES; JOEL FERREIRA SANTIAGO JÚNIOR; CLEIDIEL APARECIDO ARAÚJO LEMOS; FELLIPPO RAMOS VERRI. Vertical and Horizontal Misfit Analysis of 3-unit FDP Fabricated with Different Techniques and CAD/CAM Systems. Brazilian Dental Journal, v. 29, n. 4, p. 342-346, 2018-08-00. (11/19150-7)

MELLO, CAROLINE; SANTIAGO JUNIOR, JOEL FERRARO; GALHANO, GRAZIELA; QUINELLI MAZARO, JOSE VITOR; SCOTTI, ROBERTO; PELLIZZER, EDUARDO. Analysis of Vertical Marginal Adaptation of Zirconia Fixed Dental Prosthesis Frameworks Fabricated by the CAD/CAM System: A Randomized, Double-Blind Study. International Journal of Prosthodontics, v. 29, n. 2, p. 157-160, MAR-APR 2016. (11/19150-7, 12/06311-5)

DE LUNA GOMES, JESSICA MARCELA; DANTAS DE MORAES, SANDRA LUCIA; ARAUJO LEMOS, CLEIDIEL APARECIDO; CRUZ, RONALDO SILVA; FERNANDES E OLIVEIRA, HISKELL FRANCINE; PELLIZZER, EDUARDO PIZA. Systematic review and meta-analysis of welding procedures in one-piece cast implant-supported frameworks. BRAZILIAN ORAL RESEARCH, v. 33, p. 12-pg., 2019-01-01. (11/19150-7)