Effect of eccentric load cycling on microleakage of Class V flowable and packable composite resin restorations

Class V composite restorations are subject to the stresses that induce non-carious cervical lesions. This study evaluated the effect of eccentric oblique load on microleakage of restorations. Class V cavities were randomly prepared on the buccal surfaces of 40 recently extracted premolars and restor...

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Bibliographic Details
Published inOperative dentistry Vol. 26; no. 6; p. 603
Main Authors Jang, K T, Chung, D H, Shin, D, García-Godoy, F
Format Journal Article
LanguageEnglish
Published United States 01.11.2001
Subjects
Analysis of Variance
Bicuspid
Bite Force
Composite Resins - chemistry
Dental Cavity Preparation
Dental Leakage
Dental Marginal Adaptation
Dental Stress Analysis
Elasticity
Humans
Materials Testing
Statistics, Nonparametric
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Summary:Class V composite restorations are subject to the stresses that induce non-carious cervical lesions. This study evaluated the effect of eccentric oblique load on microleakage of restorations. Class V cavities were randomly prepared on the buccal surfaces of 40 recently extracted premolars and restored with composite resin according to manufacturers' directions. Teeth were randomly assigned to one of four treatment groups with 10 teeth per group: (1) flowable resin (Revolution) without load cycling; (2) packable resin (Prodigy Condensable) without load cycling; (3) flowable resin with load cycling (200,000 cycles) and (4) packable resin with load cycling (200,000 cycles). All teeth were then immersed in 2% methylene blue solution for 24 hours after thermocycling (500 cycles). Dye penetration was measured (scores 0-3). The results indicated that adding load cycling significantly increased microleakage (p < 0.05). No significant differences in microleakage were observed for flowable resin vs packable resin. Gingival margins had significantly more microleakage (p < 0.05) than occlusal margins.
ISSN:0361-7734