Bitter Kerstin, Paris Sebastian, Hartwig Christian, Neumann Konrad, Kielbassa Andrej M
Department of Operative Dentistry and Periodontology, University School of Dental Medicine, Charité-Universitätsmedizin Berlin, Germany.
Dent Mater J. 2006 Sep;25(3):493-502. doi: 10.4012/dmj.25.493.
The aim of this study was to evaluate the shear bond strengths of pre- and untreated resin core materials to lithium disilicate ceramics. Bond strengths to dental hard tissues served as controls. Ceramic cubes (IPS-Empress II) were luted either with a one-step (Variolink II/Excite DSC) or multiple-step total etching bonding system (Tetric Flow/Syntac Classic) to ground surfaces of human enamel, dentin, and resin core materials (Clearfil Core, Multicore). Resin core materials were additionally pretreated with hydrofluoric acid (HF) or were silica-coated (CoJet System). Shear bond strengths were determined after 24-hour water storage (n=10) and thermocycling (TC) (n=10; 2000 cycles, 5-55 degrees C, 30 seconds). Bond strengths to enamel, dentin, and silica-coated composites were significantly higher compared to untreated and HF-pretreated composites (p<0.05; Tukey B). Indeed, silica coating of the composite resins significantly increased the bond strength to ceramics (p<0.05; Tukey B). Due to the lower bond strength values of ceramics to untreated composite resins (as compared to enamel and dentin), any indication for a resin core build-up prior to the preparation of a ceramic restoration should be considered carefully.
本研究的目的是评估预处理和未处理的树脂核材料与二硅酸锂陶瓷之间的剪切粘结强度。与牙体硬组织的粘结强度作为对照。将陶瓷方块（IPS-Empress II）用一步法（Variolink II/Excite DSC）或多步法全酸蚀粘结系统（Tetric Flow/Syntac Classic）粘结到人类牙釉质、牙本质和树脂核材料（Clearfil Core、Multicore）的磨面上。树脂核材料另外用氢氟酸（HF）预处理或进行硅涂层处理（CoJet系统）。在水储存24小时后（n = 10）和热循环（TC）后（n = 10；2000次循环，5 - 55摄氏度，30秒）测定剪切粘结强度。与未处理和HF预处理的复合材料相比，与牙釉质、牙本质和硅涂层复合材料的粘结强度显著更高（p < 0.05；Tukey B检验）。实际上，复合树脂的硅涂层显著提高了与陶瓷的粘结强度（p < 0.05；Tukey B检验）。由于陶瓷与未处理复合树脂的粘结强度值较低（与牙釉质和牙本质相比），在制备陶瓷修复体之前进行树脂核堆积的任何指征都应仔细考虑。
