|
KMID : 0362319950200010351
|
|
Journal of Korean Academy of Operative Dentistry
1995 Volume.20 No. 1 p.351 ~ p.361
|
|
|
A study on the shear bond strength of the composite resin according to the surface treatment of the blaeached enamel
|
|
|
|
|
Abstract
|
|
|
The purpose of this study was to evaluate the shear bond strength of the composite resin bonded on the bleached enamel surface according to its surface treatment.
90 extracted human premolars were divided into six groups. : enamel unbleached (control group) and enamel bleached with 15% carbamide peroxide for 2 weeks (experimental groups: 1, 2, 3, 4 and 5). The surface of bleached enamel in all experimental
groups
was treated by following manners.
Experimental group1 : catalase immersion for 3 mimutes.
Experimental group 2: catalase immersion ofr 15 mimutes.
Experimental group 3: artifical saliva immersion for 1 hour.
Experimental group 4 : artificial saliva immersion for 48 hours.
Experimental group 5: surface reduction of the bleached enamel about 0.5mm-1mm with superfine diamond bur.
Composite resin molds(3mm height, 3mm diameter) were bonded to the untreated enamel and treated. The shear bond strengths of composite resin bonded to enamel of each specimen were tested with universal testing machine at a crosshead speed of
5mm/min and
500Kg in full scale and analyzed statistically.
@ES The following results were obtained :
@EN 1. Control group had the highest shear bond strength with 19.92±5.14MPa and experimental group 5 had the lowest shear bond strength with 11.15±4.23MPa.
2. Control group showed significant differences in shear bond strength with experimental group 1(P<0.05).
3. Control group showed significant differences in shear bond strength with experimental group 5(P<0.05).
4. Experimental group 4 showed significant differences in shear bond strength with experimental group 5(P<0.05).
5. Experimental group 3 showed no significant differences in shear bond strength with experimental group 4(P<0.05).
|
|
|
KEYWORD
|
|
|
|
|
|
FullTexts / Linksout information
|
|
|
|
|
Listed journal information
|
|
|