Evaluation of Marginal and Internal Integrity of Modified Resin-Bonded Fixed Partial Dentures: An In Vitro Study
Journal of Korean Dental Science
;
: 29-34, 2017.
Article
in English
| WPRIM
| ID: wpr-25853
ABSTRACT
PURPOSE:
The purpose of this study was to evaluate the microleakage of various types of resin-bonded fixed partial dentures (RBFPDs) after artificial aging. MATERIALS ANDMETHODS:
Forty models with missing first molar were fabricated using artificial resin teeth and were divided into four groups Group A, conventional RBFPDs design; Group B, modified RBFPDs design; Group C, assembled 3-piece RBFPDs design; and Group D, assembled 3-piece RBFPDs with different occlusal rest positions. Half of the specimens underwent chewing simulation process (240,000 cycles, 50 N load, 1.7 Hz) and thermocycling (temperatures 5℃~55℃, dwelling time 30 seconds) and the remaining 20 specimens didn't receive any treatment. All the specimens were immersed in 2% methylene blue solution for 24 hours to evaluate microleakage, and were sectioned at the middle part of abutment teeth. To evaluate the microleaskage, a dye penetration was calculated.RESULT:
With artificial aging, cyclic loading and thermocycling, a 3-piece RBPFD and a 2-piece RBPFD using original tooth undercuts have significantly lower microleakge (P<0.05) compared to the conventional design of RBPFD and modified RBPFD.CONCLUSION:
Within the limit of this experiment, the assembled RBFPDs exhibited a smaller microleakage than the conventional RBFPDs, implying that the assembled RBFPDs can be more effective for reducing the dislodgement of the RBFPDs.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Tooth
/
In Vitro Techniques
/
Aging
/
Denture, Partial, Fixed, Resin-Bonded
/
Denture, Partial, Fixed
/
Mastication
/
Methylene Blue
/
Molar
Language:
English
Journal:
Journal of Korean Dental Science
Year:
2017
Type:
Article
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