Resistance to cyclic fatigue andfracture of structurally compromised root restored with three different postand core systems / 实用医学杂志
The Journal of Practical Medicine
; (24): 1425-1427, 2015.
Article
in Zh
| WPRIM
| ID: wpr-462986
Responsible library:
WPRO
ABSTRACT
Objective To compare the fracture resistances of teeth restored with 3 different posts-core and failure modes. Methods 54lower premolarsendodontically treated teeth were selected for thisstudy and divided into three groups randomly (without ferrule, 1 mm ferrule and 2 mm ferrule). Each group was then divided into 3 sub-groups (6 teeth in each group) and restored with cast post-core, glass fiberpost-core, andceramic post-core respectively. After thermocycling specimens , the fracture resistance was measured using a cyclic fatigue testing machine. Data were analyzed with 2-way ANOVA (α = 0.05). Results Fiber post-core group exhibited significantly higher resistance to fracture compared with groups of cast post-core and ceramic post-core (P<0.05). Preparing dentin ferrules increased significantly fatigue resistance (P < 0.05). Conclusions Glassfiber posts were able to preserve and reinforce the remaining tooth structures. Dentin ferrule preparation is necessary to enhancefractureresistance.
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Index:
WPRIM
Language:
Zh
Journal:
The Journal of Practical Medicine
Year:
2015
Type:
Article