The effect of surface treatment on the shear bond strength of luting cement to a glass-infiltrated alumina ceramic.
OBJECTIVE
The aim of this study was to evaluate the effect of three different surface treatments on the bond strength of four different luting cements--three bis-GMA-based resin cements and a compomer cement--to In-Ceram.


METHODS
Eight In-Ceram samples were used for each experimental group. The samples were randomly assigned three treatment conditions: (1) etching for 90 seconds with 5% hydrofluoric acid gel, (2) sandblasting (110-micron Al2O3), and (3) tribochemical silica coating. All samples were silanated following the surface treatment. The luting cements were bonded to In-Ceram specimens using Teflon tubes. All samples were thermocycled for 5,000 cycles altering between 5 and 55 degrees C with 30-second dwell times. The shear bond strength values were measured in a universal testing machine with a cross-head speed of 1 mm/min. Analysis of variance was used to analyze data.


RESULTS
The mean bond strengths varied between 1.2 and 24.7 MPa.


CONCLUSIONS
Shear bond strength of compomer cement following tribochemical silica coating was significantly lower in comparison to resin cements. Luting of In-Ceram with various resins provided varying degrees of bond strengths that were significantly increased by the tribochemical silica-coating system.
Ozcan
M
M
Department of Prosthodontics, Faculty of Dentistry, Marmara University, Istanbul, Turkey. mutluozcan@hotmail.com
Alkumru
H N
HN
Gemalmaz
D
D
D000537:Aluminum Oxide; D020770:Compomers; D001840:Dental Bonding; D003738:Dental Cements; D003776:Dental Porcelain; D006858:Hydrofluoric Acid; D008422:Materials Testing; D019279:Resin Cements; D012821:Silanes; D013499:Surface Properties; D013718:Tensile Strength
D020770:Compomers; D003738:Dental Cements; D019279:Resin Cements; C076811:Rocatec; D012821:Silanes; D003776:Dental Porcelain; C070870:In-Ceram; D000537:Aluminum Oxide; D006858:Hydrofluoric Acid