Repair Bond Strength of a Resin Composite to Plasma-Treated or UV-Irradiated CAD/CAM Ceramic Surface

Abstract

Abstract:The aim of this study was to investigate whether atmospheric-pressure plasma (APP) or ultraviolet (UV) irradiation could alter the hydrophilicity of a computer-aided design/computer-aided manufacturing (CAD/CAM) glass ceramic surface, and thereby enhance the repair bond strength between the ceramic and a resin composite. Forty-eight leucite-reinforced glass ceramic discs were treated with 40% phosphoric acid and randomly assigned into one of six groups: Group 1, control; Group 2, treated with a mixture of Clearfil SE Bond primer (SEP) and Clearfil Porcelain Bond Activator (PBA); Group 3, subjected to APP irradiation for 10 s; Group 4, subjected to UV irradiation for 60 min; Group 5, APP irradiation followed by SEP/PBA; and Group 6, UV irradiation followed by SEP/PBA. After treatment, discs were bonded with resin composite using Clearfil SE Bond and stored in water at 37 • C for 1 week. We then tested how these treatments affected the microtensile bond strength (µTBS) and measured changes in the water contact angle (CA). Samples from Group 2 showed the highest µTBS (44.3 ± 6.0 MPa) and CA (33.8 ± 2.3 • ), with no significant differences measured between Groups 1, 3, and 4 (p < 0.05). Furthermore, the additional treatments of APP or UV before SEP/PBA had no effect (Group 5, p = 0.229) or a reduced effect (Group 6, p = 0.006), respectively, on µTBS. Overall, APP or UV irradiation before SEP/PBA treatment did not enhance the repair bond strength.

Influence of commercial adhesive with/without silane on the bond strength of resin-based composite repaired within twenty-four hours

“…Silane is recommended for enhancing the bonding capacity between silica-based ceramics and resin through the existence of hydroxyl and organofunctional groups in silane, which respectively bond to silica and resin. 37 However, silane can not only act as an adhesion promoter but also increasing the wettability and bond strength. 38 Beautifil II, composed of a multifunctional glass filler and S-PRG filler based on a nano-hybrid type fluroboroaluminosilicate glass, at a filler loading of 83.3 wt%, 39 was the target for chemical reaction with silane in ceramic restoration.…”

UV-Mediated Photofunctionalization of Indirect Restorative Materials Enhances Bonding to a Resin-Based Luting Agent

“…The preparation of restorations' inner surfaces is a critical step in which high pressurized particle abrasion or strong acids (i.e., hydrofluoric acid—HF) can be used [ 23 , 24 ]. However, in Japan, hydrofluoric acid cannot be used by dental clinicians since a 3-year-old child patient died of acute drug intoxication from hydrofluoric acid in 1982 when fluoride solution was misplaced by the acid [ 25 ]. Thus, nowadays, dentists cannot buy HF acid, and they rely on the dental technician for the HF application.…”

“…Thus, nowadays, dentists cannot buy HF acid, and they rely on the dental technician for the HF application. Alternatively, the dentist would use phosphoric acid to etch before the silane coating is applied [25][26][27]. More recently, a hypersaturated solution of zirconium oxide particles in sodium hydroxide and water has been introduced and showed an effective decontamination potential to clean zirconium surface by removing its organic contents [28][29][30]).…”

The Effect of Different Surface Treatments on the Color Stabilities of Lithium Disilicate Material

“…Whereas, phosphoric acids are relatively safer and do not produce any compounds that decrease the bond strength and are non-washed easily ( 34 ). Phosphoric acid may minimally roughen surfaces ( 34,37 ), but can neutralize the alkalinity of the absorbed water layer on the ceramic surface, thus contributing to the chemical activity of the ceramic primer that is subsequently applied ( 33 ). It has been reported that bond strength between ceramic and cement may increase when phosphoric acid is used with ceramic primer ( 34 ).…”