Banca de QUALIFICAÇÃO: ADELIANA GARCIA VERISSIMO

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : ADELIANA GARCIA VERISSIMO
DATE: 07/07/2020
TIME: 14:00
LOCAL: Plataforma zoom
TITLE:

INFLUENCE OF DIFFERENT CAD/CAM WORKFLOWS ON THE ACCURACY OF OCCLUSAL AND PROXIMAL CONTACTS ON LITHIUM DISSILICATE CROWNS

KEY WORDS:

CAD / CAM systems. Lithium disilicate crowns. Occlusion morphology. Occlusal contacts and proximal contacts.

PAGES: 95
BIG AREA: Ciências da Saúde
AREA: Odontologia
SUMMARY:

This in vitro study aimed to evaluate the effect of the digital workflow using chairside and laboratory-based CAD / CAM systems regarding the precision of occlusal and proximal contacts in lithium disilicate crowns. Lithium disilicate crowns were produced (n = 50) and divided into the following groups: CEREC Bluecam (n = 10), CEREC Apollo Di - CAI (n = 10), 3Shape Trios - (n = 10), CEREC InEos X5 - (n = 10) and 3Shape D900 / Wieland-Zenotec (n = 10), being the first three groups chairside CAD / CAM systems and the last two, laboratory-based CAD / CAM systems. For the contacts evaluation, virtual crowns were projected and digital images of occlusal and proximal contacts were captured by the software systems and paired with real crown images after milling and checking the contacts with carbon. The images were randomly inserted into a software and evaluated by 3 blinded and calibrated evaluators. The Kruskal-Wallis Test and the Mann Whitney Post-test with Bonferroni corrections (0,0083) were used for the comparison of the proximal contacts while ANOVA and Tahame Post-test were used for the comparison of the occlusal contacts. After cementation, an evaluation of the interproximal contact points between crown and adjacent teeth, using dental floss was also performed. Occlusal contacts were also analysed. ANOVA test and Tukey's post-test were used for the quantitative analysis of the different systems regarding occlusal contacts and the Chi-square for qualitative assessments. There was a significant difference regarding the distribution of occlusal contacts between the different systems (p <0.001), with a better result in the chairside systems. The qualitative evaluation also showed a significant difference. In clinical analysis of interproximal contacts, using dental floss, 50% of the crowns had contact deficiency, with no contact point. Only the TRIOS system produced 75% of their crowns with satisfactory quality. Within the limitations of the study, it can be concluded that chairside systems showed better fidelity than InLab systems. There was a deficiency in the proximal contacts of 50% of the evaluated crowns and only 3Shape Trios system presented promising results.

BANKING MEMBERS:
Presidente - 1466265 - GUSTAVO AUGUSTO SEABRA BARBOSA
Interna - 1459400 - ADRIANA DA FONTE PORTO CARREIRO
Interna - 2946627 - ERIKA OLIVEIRA DE ALMEIDA