Optical Coherence Tomography (OCT) for the evaluation of internal adaptation of class V resin restorations on Dentin

摘要

Internal adaptation of adhesive restorations affects their longevity. In a clinical setting, the dentists use visual and tactileexamination to evaluate marginal adaptation, while radiographs provide somewhat reliable information about adaptationor secondary caries present. For class V restorations located on the vestibular (buccal) surfaces, none of the tools availablecan provide any information about the internal adaptation or the presence of secondary caries. OCT has been proven to bea useful tool for non-destructive assessment of internal adaptation of adhesive restorations. This paper is evaluating theuse of a new high-resolution handheld OCT prototype with a pen-shaped intraoral tip and an imaging depth of 8mm toexamine the internal adaptation and the presence of demineralization under resin restorations on the vestibular dentinsurface.The Axsun OCT system helped evaluate the internal adaptation of composite restorations, differentiate between healthyand demineralised dentin, adhesive, and restoration layers. OCT provided a unique visualization and characterization ofinternal structures as well as non-contact assessment of marginal adaptation.