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- Title
FRACTURE RESISTANCE OF WEAKENED ROOT STRUCTURE REINFORCED BY TWO TYPES OF COMPOSITE RESIN AND ENDODONTIC SEALER.
- Authors
A. M., Ahmad; W. Z., Wan Bakar; A., Husein
- Abstract
Objective: To compare the fracture resistance of reinforced weakened root canals by two different types of composite resin (auto-cured and light-cured) in teeth apically seal by two different types of sealer (experimental nano hydroxyapatite containing sealer and AH26 silver free sealer). Materials and Method: The crowns of 112 sound human permanent maxillary central incisors were transversely sectioned leaving 13 mm root length. Canal preparation done using step back technique and half of the sample were seal with AH26 silver sealer and the other half with nano hydroxyapatite sealer. Enlarged post space was prepared for both groups to weaken it before each group were randomly divided into two and finally achieved four groups (1, 2, 3 and 4). Roots in group 1 and 3 were reinforced using light-cured composite resin (Z100) while group 2 and 4 using autocured composite resin (Alpha-Dent). A titanium post was cemented and the root mounted in the resin block for mechanical test. The tooth loaded in 130° degree with long axis of the tooth in the universal testing machine until fracture. Results: The mean load to fracture and SD for groups 1, 2, 3 and 4 was 599.89 N (124.62), 572.08N (158.01), 549.29 N (116.77) and 532.46N (105.97) respectively. A one-way ANOVA and post hoc test indicate that there is no significant difference between the four groups in mean of load to fracture at p>0.05. Discussion and Conclusion: The combinations of any two materials (Z100, Alpha-Dent) and two sealers (new nano hydroxyapatite, AH26 silver free) in the reinforcement of the weakened endodontically treated tooth give the similar results of the fracture resistance. Alpha-Dent auto-cured composite resin and experimental nano hydroxyapatite epoxy resin sealer could be used to reinforce the structurally compromised root.
- Subjects
DENTAL pulp cavities; DENTAL resins; SURFACE sealers; HYDROXYAPATITE coating; ENDODONTICS
- Publication
Malaysian Journal of Medical Sciences, 2008, p79
- ISSN
1394-195X
- Publication type
Article