Banca de QUALIFICAÇÃO: BRUNA KATHERINE GUIMARÃES CARVALHO

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : BRUNA KATHERINE GUIMARÃES CARVALHO
DATE: 22/06/2022
TIME: 10:00
LOCAL: PLATAFORMA REMOTA
TITLE:

Stabilizing splints manufatured by digital method: in vitro microbiological test and fracture resistance.

KEY WORDS:

Stabilizing splints; CAD/CAM; Fracture resistance; Microbiological adhesion.

 

 

PAGES: 57
BIG AREA: Ciências da Saúde
AREA: Odontologia
SUBÁREA: Clínica Odontológica
SUMMARY:

The technologies improvement that reduces clinical work time and preserves the immediate acquisition of stabilizing splints was possible by CAD/CAM and many gaps about these device behavior about mechanical and biological variables are unknown. Thus, the objective of this project was to verify if the resins used in digital technology of milled and printed stabilizer splints can influence fracture resistance and microorganism adhesion, in relation to the resin applied in manufacture of conventional thermopolymerizable splints. The method included mechanical and microbiological steps, each one composed by Conventional (CG) (n=30), Milled (MG) (n=30) and Printed (PG) (n=30) groups, according to the method of preparation, each one having three subgroups (n=10) that varied the specimen thickness from 1 to 3 mm. In the mechanical step, the samples, in the form of 65 mm bars, were tested for fracture resistance in a universal testing machine, with load cell of 500 kgf and speed of 1 mm/min; in the microbiological step, the shape was in form of 15 mm diameter discs, subjected to micro-organism adhesion to the surface with exposure to S. mutans and kept for 24 hours at 35 °C in oven for successive CFU counting. Data were stored in SPSS 22.0 and statistical analysis used ANOVA and Tukey's post hoc. The results of microbiological step did not show statistical differences between the groups (p>0.005), however PG presented a profile of lower surface adhesion. For the mechanical phase, ANOVA had identified differences between the groups (p≤0,005), showing CG and MG had presented better results. Tukey´s post hoc had considered difference between MG and PG (p=0,031), listing MG as superior. It was observed the digital technic is reliable, especially when the milled mode is individualized.

 

COMMITTEE MEMBERS:
Presidente - 2946627 - ERIKA OLIVEIRA DE ALMEIDA
Interno - 1466265 - GUSTAVO AUGUSTO SEABRA BARBOSA
Externa ao Programa - 3138832 - MARIA REGINA MACEDO COSTA - null