A qualitative approach on marginal adaptation of conditioned dental infrastructures using optical coherence tomography

Ceramic prosthesis performed through additive and subtractive technologies, lead to superior esthetic results towards metal-ceramic prosthesis. Ceramic veneers can be bonded to dental preparations with different types of cement. 100 ceramic veneers were performed on a preparation at the central maxilar incisor. The veneers were treated with different methods for obtaining a superior adhesion to dental structures. The veneers were devided into five groups and treated by (1) sandblasting, (2) sandblasting and then conditioned with HFA 9, 6% (hidrofluoric acid), (3)sandblasting with HFA (hidrofluoric acid) 5, 5%, (4) HFA 9, 6% (hidrofluoric acid), (5) HFA 5, 5% (hidrofluoric acid). After conditioning, the surfaces were investigated by Scanning Electronic Microscopy technology (SEM). The aim of this study was to analyze the quality of marginal adaptation and gap width of Empress veneers using en-face optical coherence tomography. The results prove the importance of investigation the marginal adaptation after every veneer bonding