Oral Health and Dental Management

Effect of mechanical and chemical surface treatments on resin composite repair

26^th Euro Congress and Expo on Dental & Oral Health

December 10-11, 2018 | Rome, Italy

Tara Rasool Hussein Al-Barazanchi, M J German and G McCracken

Newcastle University, UK

Posters & Accepted Abstracts: Oral Health Dent Manag

Abstract:

Statement of the Problem: Repair of fractured resin composite restorations can increase longevity of repaired restoration with minimal intervention compared to replacement. A questionnaire-based study of practitioner in the North East of England suggested that high speed course diamond bur with or without adhesive system is the most widely used method of repair. Aim: The aim of this study is to investigate the surface treatment methods used in clinical practice in vitro. Methodology & Theoretical Orientation: Commercial resin composites were used for the samples (diameter=10mm, thickness=3mm, n=60). Specimens were polymerized for 40s on both faces. Two groups of surface treatments used. Group1: High speed coarse diamond burs were used for 5s with water spray. Group2: As group1, plus etched for 15s washed with water spray for 15s. Then bonding agent applied for 15s and air dried for 3s then light cured for 20s. For each group, fresh composite applied to the treated surface (diameter 5mm and height 6mm) and polymerized for 40s seconds then incubated at 37oC for 24 hours in distilled-water. SBS was measured for each group. Surface roughness of resin composites profiled. Findings: Using coarse diamond in isolation resulted in statistically significantly lower SBS for all resin composites than application of blue bur with etching and bonding for most resin composites. Surface profile of resin composites for Ra showed no significant different between most of the materials as shown in the Table 1 and 2.

Biography :

Tara Rasool Hussein Al-Barazanchi is currently pursuing her PhD at Newcastle University, United Kingdom. Her main topic of research interest is dental materials.

E-mail: t.r.h.al-barazanchi@ncl.ac.uk