title: Direct or indirect composite veneers in anterior teeth: which method causes higher tooth mass loss? An in vitro study.
abstract: There is little information in the literature regarding the relationship between preparations made for direct and indirect veneers and the loss of tooth structure required for each technique. This in vitro study sought to quantify the different mass losses from preparation techniques used for direct and indirect veneers. Thirty artificial teeth were weighted using a digital balance and placed in a dental manikin in the position corresponding to the right maxillary central incisor. Five clinicians-all experts in esthetic dentistry-were asked to perform conventional preparations for both a direct composite resin veneer and an indirect ceramic veneer. After preparations, specimens were weighted again in the same digital balance. Teeth undergoing veneer preparations demonstrated a statistically significant mass loss compared to unprepared teeth. Indirect ceramic veneer preparations produced more mass loss than direct composite veneer preparations (P < 0.01).
authors.forename: Alessandra Nunes
authors.initials: AN
authors.lastname: Machado
authors.forename: Fabio Herrmann
authors.initials: FH
authors.lastname: Coelho-de-Souza
authors.forename: Juliana Nunes
authors.initials: JN
authors.lastname: Rolla
authors.forename: Maria Carolina Guilherme
authors.initials: MC
authors.lastname: Erhardt
authors.forename: Flavio Fernando
authors.initials: FF
authors.lastname: Demarco
mesh_terms: D003188:Composite Resins; D003801:Dental Veneers; D006801:Humans; D066298:In Vitro Techniques; D010865:Pilot Projects
chemical_list: D003188:Composite Resins
keywords: ceramic; composite resin; dental cavity preparation; dental veneers; esthetics; tooth structure