title: Digital veneering system enhances microtensile bond strength at zirconia core-veneer interface.
abstract: This study investigated the effect of digital veneering system (DVS) on strengthening the bond between a zirconia core and ceramic veneer. Specimens for Groups 1 (negative control), 2 (positive control), 3, and 4 used conventional porcelain veneering technique on untreated, sandblasted, coloring agent-treated, and modifier-treated zirconia cores respectively. Group 5 used DVS, where glass ceramic veneers—produced by computer-aided milling—were fused to zirconia cores. Microtensile bond strengths (MTBS) at the interface were measured. MTBS results of Groups 1 to 5, expressed in mean (standard deviation), were 28.1 (7.3), 27.8 (6.3), 30.0 (10.2), 32.9 (8.1), and 37.8 (8.1) MPa. The DVS group had significantly higher MTBS than the negative and positive controls (p<0.05). Results showed that DVS enhanced the bond strength between zirconia core and ceramic veneer, indicating that this system could reduce adhesive failure-related complications that frequently occur at the zirconia core-veneer interface.
authors.affiliation: Department of Prosthodontics, School of Dentistry and Dental Research Institute, Seoul National University.
authors.forename: Ki-Yeon
authors.initials: KY
authors.lastname: Kim
authors.forename: Taek-Ka
authors.initials: TK
authors.lastname: Kwon
authors.forename: Tae-Joo
authors.initials: TJ
authors.lastname: Kang
authors.forename: Jae-Ho
authors.initials: JH
authors.lastname: Yang
authors.forename: Shin-Jae
authors.initials: SJ
authors.lastname: Lee
authors.forename: In-Sung
authors.initials: IS
authors.lastname: Yeo
mesh_terms: D000538:Aluminum Silicates / Q000737:chemistry; D002516:Ceramics / Q000737:chemistry; D001840:Dental Bonding; D045662:Dental Etching / Q000379:methods; D003799:Dental Stress Analysis; D003801:Dental Veneers; D008422:Materials Testing; D017680:Potassium Compounds / Q000737:chemistry; D013499:Surface Properties; D013718:Tensile Strength; D015040:Zirconium / Q000737:chemistry
chemical_list: D000538:Aluminum Silicates; D017680:Potassium Compounds; C016447:feldspar; D015040:Zirconium; C028541:zirconium oxide