Airborne-particle abrasion parameters on the quality of titanium-ceramic bonds.
BACKGROUND
Airborne-particle abrasion of titanium is a clinically acceptable method of surface preparation. It is crucial to know the effectiveness of bond strength between the metal substructure and the veneering ceramics after this kind of surface treatment.


OBJECTIVE
The purpose of this study was to determine how the particle size of the abrasive material and pressure affected treated surfaces and the strength of titanium-ceramic bonds.


METHODS
Disks made of titanium (Tritan CpTi grade 1, Dentaurum, 99.5% Ti) were treated in an airborne-particle abrasion process with 50, 110, and 250 μm aluminum oxide (Al2O3) at pressures of 0.2, 0.4, and 0.6 MPa. To characterize the treated surfaces, the following values were measured: roughness, free surface energy, and the quantity of abrasive particles attached to the surface. Subsequently, the strength of the metal-ceramic bond was determined. Apart from the strength tests, fractures were observed to determine the character and fracture location in the course of the strength tests. The results of the experiment were analyzed with 2-way ANOVA and the Tukey HSD test (α=.05).


RESULTS
Both the pressure and the particle size of Al2O3 used in the airborne-particle abrasion affected the strength of the titanium-ceramic bond (P<.05). A statistically significant difference was found between the group subjected to airborne-particle abrasion under a pressure of 0.4 MPa with 110-μm Al2O3 particles and the other experimental groups (P<.05).


CONCLUSIONS
This study demonstrates that the highest bond strength between a ceramic and titanium substructure can be achieved after airborne-particle abrasion at an angle close to 45 degrees with 110-μm Al2O3 particles under 0.4 MPa of pressure.
Doctor of Medicine, Department of Prosthetic Dentistry, Medical University of Lodz, Lodz, Poland.
Marcin
M
Golebiowski
Assistant Professor, Institute of Materials Science and Engineering, Lodz University of Technology, Lodz, Poland. Electronic address: emilia.wolowiec@p.lodz.pl.
Emilia
E
Wolowiec
Clinical Professor, Department of Dental Techniques, Medical University of Lodz and Institute of Materials Science and Engineering, Lodz University of Technology, Lodz, Poland.
Leszek
L
Klimek
D000537:Aluminum Oxide / Q000737:chemistry; D002516:Ceramics / Q000737:chemistry*; D001840:Dental Bonding; D045662:Dental Etching / Q000379:methods*; D003764:Dental Materials / Q000737:chemistry*; D003801:Dental Veneers; D006801:Humans; D006847:Hydrocarbons, Iodinated / Q000737:chemistry; D008422:Materials Testing; D018613:Microscopy, Confocal; D008855:Microscopy, Electron, Scanning; D010316:Particle Size; D011312:Pressure; D033081:Shear Strength; D013314:Stress, Mechanical; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*; D014867:Water / Q000737:chemistry; D017155:Wettability
D003764:Dental Materials; D006847:Hydrocarbons, Iodinated; D014867:Water; C027946:methylene iodide; D014025:Titanium; D000537:Aluminum Oxide