Evaluation of Resin-Resin Interface in Direct Composite Restoration Repair

International Conference on Innovative Research - ICIR Euroinvent 2017

Stoleriu, S.^1 ; Andrian, S.^1 ; Pancu, G.^1 ; Nica, I.^1 ; Iovan, G.^1

Odontology, Periodontology and Fixed Prosthodontics Department, Grigore T. Popa University of Medicine and Pharmacy, Faculty of Dental Medicine, Iai, Romania^1

关键词: Bonding agent;    Composite resins;    Composite restorations;    Direct contact;    Dye penetration;    Hybrid composites;    Microleakage;    Study Groups;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/209/1/012078/pdf
DOI  :  10.1088/1757-899X/209/1/012078

来源: IOP

【 摘 要 】

The aim of this study was to evaluate the resin-resin interface when a universal bonding agent was used in two different strategies in direct restoration repair. Two composite resins (a micro-filled hybrid and a nano-filled hybrid) as old restorations that have to be repair, a universal bonding agent and a micro-filled hybrid composite resin (different then that aged) as new material for repair were chosen for the study. Non-aged samples were used as control and aged samples were used as study groups. The universal bonding agent was applied in etch-and-rinse and in self-etch strategies. The interface between old and new composite resins was evaluated by SEM and the microleakage was assessed by scoring the dye penetration. Very good adaptation of the two different composite resins placed in direct contact in non-aged samples was recorded. No gaps or defects were visible and strong resin-resin contact was observed. After aging, enlargement of resin-resin junction were observed in most of the samples and a increased dye penetration was recorded irrespective of the strategy (etch-and-rinse or self-etch) used for bonding agent application.