Abstract
BackgroundTo compare the fluorescence-aided and conventionally excavated dentin with microhardness and shear bond strength(SBS) tests.Material and MethodsTwenty-four teeth with dentin caries were bisected through the center of the lesion into two halves. Forty-eight dentin specimens were embedded and mounted in an acrylic resin. All carious tissue was removed and classified as caries free using conventional visual tactile criteria. Then half of the specimens(n=24) were reinspected with fluorescence-aided caries excavation light(FACE) (FaceLight, W&H Dentalwerk, Bürmoos GmbH, Austria). Specimens were subjected to microhardness and shear bond strength testings. The fracture mode analysis was also performed. The data were compared with Student’s t test and Chi-square test.ResultsResidual caries was observed in 2 out of 24 conventionally excavated specimens with FACE inspection(p>0.05). Mean Vickers hardness of the dentin was 61.5±5 in the FACE group and 70.3±3 kg/mm2 in the conventionally excavated group(p>0.05). The mean SBS value of FACE group was 11.42±1.63 MPa and 18.27±1.43 MPa in conventionally excavated group. There was no statistically significant difference between conventional and FACE groups for microhardness and SBS tests(p>0.05). There were also no significant differences on the fracture mode distributions of the groups(p>0.05).ConclusionsFACE method could be considered as a promising technique for removing infected dentin. Key words:FACE, conventional excavation, residual caries detection, shear bond strength, microhardness.
Highlights
Caries excavation has been still regarded as a confusing procedure for the dental practitioners
Microhardness tests, based on the induced permanent surface deformation that remains after removal of the load [17,18], has been used in in vitro studies to differentiate the sound and carious dentin or the effects of various types of treatments on dental hard tissues
The optical evaluation of Knoop and Vickers indenter impressions are subjective when transparent materials used such as tooth hard tissues, at lower loads, tha data variation errors increase at small measurement and viscoelastic materials exhibit a time dependent elastic recovery leading to additional variations [22]
Summary
Caries excavation has been still regarded as a confusing procedure for the dental practitioners. The demineralized affected dentin, which can remineralize in time, could be sacrificed during the conventional excavation [5,6,7] Since this sensation is highly subjective, dye staining has been developed to make this procedure more objective by indicating only demineralized tissues [8,9]. Fluorescence aided caries excavation (FACE), a novel caries excavation system has been claimed to be an objective method in the removal of infected dentin [12]. The aim of this study was to evaluate the microhardness and shear bond strength (SBS) of dentin, after inspected by FACE and to compare this technique with the visual-tactile method. To compare the fluorescence-aided and conventionally excavated dentin with microhardness and shear bond strength(SBS) tests. Conclusions: FACE method could be considered as a promising technique for removing infected dentin
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
