Banca de QUALIFICAÇÃO: LARA BEATRIZ NASCIMENTO DINIZ

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : LARA BEATRIZ NASCIMENTO DINIZ
DATE: 09/06/2026
TIME: 15:30
LOCAL: DEPARTAMENTO DE ODONTOLOGIA
TITLE:

Influence of the Light-Curing Protocol and Adhesive System on the Durability of Resin Cement Bonding to Dentin

KEY WORDS:

Dentin-Bonding Agents; Curing Lights; Resin Cements

PAGES: 29
BIG AREA: Ciências da Saúde
AREA: Odontologia
SUMMARY:

The present study aims to evaluate the influence of different photoactivation protocols and adhesive system aging on the bond strength of resin cement to dentin. Eighty sound bovine incisors will be used, and their crowns will be embedded in acrylic resin and ground until exposure of the buccal dentin surface. The samples will be randomly distributed into groups (n = 10) according to the adhesive system used (Tetric N Bond or Excite DSC – Ivoclar Vivadent) and the adhesive photoactivation protocol (with or without prior photoactivation). After dentin conditioning and adhesive application according to the manufacturers’ recommendations, resin cement cylinders of Variolink Esthetic DC (Ø 2 mm × 2 mm) will be fabricated on the dentin surface and light cured. Half of the groups will be subjected to thermocycling (10,000 cycles between 5°C and 55°C). Subsequently, shear bond strength testing will be performed using a universal testing machine (Odeme Dental Research), followed by failure mode analysis under stereomicroscopy and scanning electron microscopy (SEM). Nanoleakage analysis by SEM/EDS and qualitative evaluation of the adhesive interface degree of conversion by Raman spectroscopy will also be carried out. The obtained data will be analyzed using the Shapiro–Wilk test, two-way ANOVA, and Tukey’s test (5%). Therefore, based on previous studies and current evidence on the topic, it is expected that improved adhesive properties, such as higher shear bond strength, will be achieved through optimized dental adhesive photoactivation protocols. Such findings are essential to fill gaps in literature, contribute to the scientific advancement of dentin adhesion, and clarify strategies to ensure improved clinical performance of these materials.

COMMITTEE MEMBERS:
Presidente - 1640419 - RODRIGO OTHAVIO DE ASSUNCAO E SOUZA
Interno - 1031499 - LAERCIO ALMEIDA DE MELO
Interna - 1678126 - PATRICIA DOS SANTOS CALDERON