fracture resistance of teeth restored with cast post and core: an in vitro study
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ID: 239231
2012
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Abstract
Context: Influence of luting agent, design of tooth preparation for cast posts on tooth resistance to fracture. Aim: To evaluate fracture resistance of teeth restored with cast posts and cores with or without cervical ferrule and cemented with zinc phosphate, glass ionomer, or resin cement. Materials and Methods: Sixty single-rooted maxillary first premolars of similar sizes were selected. Biomechanical preparation and post space preparation for cast post was done for all samples and then they were divided into two groups (n=30). Cervical ferrule preparation was done for Group A, and Group B was prepared without any cervical ferrule. Both groups were further divided into three subgroups (1, 2, and 3; n=10) Cast posts for subgroups 1, 2, and 3 were cemented with zinc phosphate, glass ionomer, and resin cement, respectively. A shearing load was applied to indented buccal cusp of specimens at an angle of 45° in universal testing machine at a cross-head speed of 1 mm/min until fracture. Results: Specimens with ferrule (Group A) had significantly higher shear bond strength values (mean 1503.37 N) than specimens without ferrule (Group B) (mean 1052.09 N). Conclusion: Inclusion of ferrule in tooth preparations for posts increased the fracture resistance regardless of the luting agent.
| Reference Key |
mankar2012journalfracture
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|---|---|
| Authors | ;S Mankar;N S Mohan Kumar;J V Karunakaran;S Senthil Kumar |
| Journal | sexuality and culture |
| Year | 2012 |
| DOI |
10.4103/0975-7406.100200
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| URL | |
| Keywords | Keywords not found |
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