Banca de DEFESA: Helton Costa Reis

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : Helton Costa Reis
DATE: 25/07/2023
TIME: 14:00
LOCAL: Plataforma Teams
TITLE:

"Evaluation of the bond strength of fiberglass posts by pull-out test, after using Sodium Thiosulfate and Ascorbic Acid to reverse dentin deproteinization"

KEY WORDS:

"Fiber Post, Ascorbic Acid, Antioxidants, Dental Materials"

PAGES: 100
BIG AREA: Ciências da Saúde
AREA: Odontologia
SUMMARY:

"The use of fiberglass posts can be indicated in large losses of tooth structure, in endodontically treated teeth. The adhesion of the post to the root canal can be altered with the irrigating solution prior to the cementation of these retainers, and the use of oxidizing agents prior to this stage has shown good results regarding this process. The present study aimed to evaluate the bond strength of fiberglass posts, through the pull-out test, after the use of Sodium Thiosulfate and Ascorbic Acid to reverse the deproteinization of the dentin. 92 endodontically treated single-rooted bovine teeth were used for this study, divided into four groups with different irrigation protocols, and after cementing the fiberglass posts and performing the pullout resistance test. The data obtained were submitted to statistical analysis, using the KruskalWallis test with a significance level of 0.05, showing a statistically significant difference between the four tested groups, with a higher mean adhesive strength in the group irrigated with 10% Ascorbic Acid after deproteinization with 5% NaOCL. The use of antioxidant agents prior to cementation of fiberglass posts can contribute to the reversal of deproteinization of dentin, and consequently improve bond strength."

BANKING MEMBERS:
Externa à Instituição - SANDRA BARBOSA MORAES DE ALMEIDA - USP
Presidente - 3157955 - LEONARDO FERNANDES DA CUNHA
Interna - 1877052 - LILIANA VICENTE MELO DE LUCAS REZENDE
Externo ao Programa - 1843167 - LUCAS FERNANDO TABATA