|
KMID : 0362120200420030213
|
|
Journal of Technologic Dentistry
2020 Volume.42 No. 3 p.213 ~ p.219
|
|
|
Evaluation of surface treatment methods on the bond strength of veneer ceramic to the zirconia core
|
|
Lee Gwang-Young
Hong Min-Ho
|
|
|
Abstract
|
|
|
Purpose: This study aimed to identify the impact of physical surface roughing with a polishing tool onto the pre-sintering yttria-stabilized tetragonal zirconia polycrystals (TZP) core and liner treatment for chemical bonding on the bond strength of TZP core and veneering ceramic.
Methods: Overall, 80 specimens were classified into two groups (non-liner, NL; and usingliner, UL ) depending on the use of liner, and these two groups were then subclassified into four groups depending on the polishing tool used. (1) Non-liner groups: NS, non-liner+stone point; NC, non-liner+carbide bur; NP, non-liner+paper cone point; NT, non-liner+silicon point. (2) Using-liner groups: US, using-liner+stone point; UC, using-liner+carbide bur; UP, usingliner+ paper cone point; UT, using-liner+silicon point. The pre-sintering surface roughing values and shapes were observed, and after burning up the veneering ceramic, the shear bond strength was measured using a universal testing machine. For significance testing, a oneway analysis of variance and Tukey’s multiple comparison test were conducted. An optical microscope was used to observe the fracture plane, and the following results were obtained.
Results: Surface roughness NP (4.09±0.51 μm) represented a higher value than other groups (p<0.001). In shear bond strength, NS (35.21±1.44 MPa) of the NL group showed the highest bond strength (p<0.001). The UL group did not show a statistically significant difference between groups (p=0.612).
Conclusion: Our study findings reveal that the bond strength of TZP core and veneering ceramic was improved by pre-sintering physical surface treatment than by chemical bonding with liner surface treatment.
|
|
|
KEYWORD
|
|
|
Bond strength, Liner, Veneering ceramic, Zirconia
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|