ABSTRACT
The objective of this in vitro study was to compare the microleakage of a flowable low-shrinkage-stress resin composite--in a Class II fatigue-loading design when used as a 4 mm dentin replacement--to a conventionally layered silorane-based resin composite. Eighty standardized 4 mm deep cavities, divided into 4 subgroups, were restored with the 2 tested materials. Half of the restorations were submitted to mechanical loading, and all of the restorations were prepared for microleakage evaluation. The evaluation of the marginal adaptation to dentin was performed with scanning electron microscopy. The results showed that both silorane-based composite groups had higher rates of microleakage in comparison to the low-shrinkage-stress resin composite groups.
Subject(s)
Composite Resins/standards , Dental Leakage/etiology , Composite Resins/therapeutic use , Dental Caries/surgery , Dental Marginal Adaptation , Dental Restoration, Permanent/methods , Dental Restoration, Permanent/standards , Dental Stress Analysis , Humans , In Vitro Techniques , Microscopy, Electron, Scanning , Silorane Resins/standards , Silorane Resins/therapeutic useABSTRACT
Traditionally, deep carious lesions are treated by removal of all carious tissue, which may lead to pulp exposure. To minimize this risk, conservative carious tissue removal techniques have been proposed, including partial removal and stepwise excavation. However, there is no consensus in the literature about which is the better technique. Thus, the aim of this article is to describe and discuss the main techniques for carious tissue removal, according to scientific evidence. It was observed that both stepwise excavation and partial carious tissue removal presented lower pulp exposure rates and higher success rates. Clinical Relevance: Clinicians must be aware that conservative carious tissue removal techniques, such as stepwise excavation and partial carious tissue removal, present lower pulp exposure rates and higher success rates than traditional methods.
