Evaluation of Marginal and Internal Integrity of Modified Resin-Bonded Fixed Partial Dentures: An In Vitro Study.
10.5856/JKDS.2017.10.1.29
- Author:
Sung Hyeon AHN
1
;
Jae Won CHOI
;
Yong Chan JEON
;
Chang Mo JEONG
;
Mi Jung YOON
;
So Hyoun LEE
;
Jung Bo HUH
Author Information
1. Department of Prosthodontics, Dental Research Institute, Institute of Translational Dental Sciences, BK21 PLUS Project, School of Dentistry, Pusan National University, Yangsan, Korea. neoplasia96@hanmail.net
- Publication Type:Original Article
- Keywords:
Artificial aging;
Denture, partial, fixed, resin-bonded;
Microleakage
- MeSH:
Aging;
Denture, Partial, Fixed*;
Denture, Partial, Fixed, Resin-Bonded;
In Vitro Techniques*;
Mastication;
Methylene Blue;
Molar;
Tooth
- From:Journal of Korean Dental Science
2017;10(1):29-34
- CountryRepublic of Korea
- Language:English
-
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 AND METHODS: 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.
