Effect of Different Ferrule Length on Fracture Resistance of Endodontically Treated Teeth: An In vitro Study
Journal Title: Journal of Clinical and Diagnostic Research - Year 2017, Vol 11, Issue 4
Abstract
Introduction: A ferrule has been described as a key element of tooth preparation when using a post and a core. It is a vertical band of tooth structure at the gingival aspect of crown preparation. It lessens the stress transmission to the root which is due to forces from posts or bending during seating of the post. The incorporation of a ferrule can help to withstand the forces of occlusion, preserve the hermetic seal of the luting cement, and minimize the concentration of stresses at the junction of post and core. Aim: To evaluate and compare the effect of ferrule length on fracture resistance of endodontically treated mandibular premolar teeth, restored with prefabricated glass fiber post luted with resin cement, composite core and a full coverage metal crown. Materials and Methods: Forty freshly extracted mandibular premolars were treated endodontically. They were randomly divided into four groups according to their ferrule height: 3 mm, 2 mm, 1 mm and 0 mm (no ferrule). All specimens were restored with prefabricated glass fibre posts (Reforpost, Angelus) and composite resin (Filtek™ Z250xt). Standardized preparation was done on each specimen to receive a cast metal crown. The specimens were thermocycled and compressive static load at a crosshead speed of 1 mm/min was applied at an angle of 30° on lingual incline of buccal cusp of the crown until failure occurred. The load (N) at failure and mode of failure were recorded. Statistical analysis was performed with Kruskal Wallis test. Result: Fracture resistance values among the groups was found to be statistically significant (p<0.001). The 3 mm ferrule group had significantly higher failure load (971.99+133.07) compared to 2 mm (848.84+109.60), 1 mm (714.64+133.89) and 0 mm ferrule groups (529.36+119.95). More favourable failure modes were observed in almost all groups. Conclusion: The results of this study showed that fracture resistance of endodontically treated teeth increases as ferrule length increases.
Authors and Affiliations
Sushil Kar, Arvind Tripathi, Chavi Trivedi
Keywords
Related Articles
- EP ID EP340061
- DOI 10.7860/JCDR/2017/24669.9675
- Views 94
- Downloads 0
Renal Clear Cell Sarcoma - Anaplastic Variant: A Rare Entity
Clear Cell Sarcoma of Kidney (CCSK) is known for its morphologic diversity, aggressive behaviour, tendency to recur and metastasis to bone. Amongst the various morphologic subtypes, anaplastic CCSK is associated with wor...
Erythrocytes and Platelets: A Critical Analysis of their Ontogenic Relationship through Automated Parameters
Introduction: Erythrocytes and platelets share an intimate development history, due to which special interest is centered on their relationship. Mature Red Blood Cells (RBCs) and platelets show a similar physiological rh...
Pathological and Biochemical Evaluation of Toxic Effects of Repeated Administration of Jasada Bhasma (Zinc Ash Formulation) in Wistar Albino Rats
Introduction: Jasada Bhasma is the well known potent zinc formulation commonly used in ‘Ayurveda’ medicine system. Its extensive usage in the health care sector is proved to be successful in the treatment of certain illn...
Massive Benign Phyllodes Tumour of Breast Complicating Pregnancy
Phyllodes tumour of the breast, earlier called cystosarcomaphyllodes, is a rare fibroepithelial breast neoplasm that occurs in all age groups from adolescents to elderly. Phyllodes tumour occurring during pregnancy and a...
Management of Inflammatory Bowel Disease and Pregnancy using Prophylactic Low Dose Low Molecular Weight Heparin and Corticosteroids
The circulating nonspecific immune complexes, complement system peptides and auto-antibodies may induce inflammatory/ thrombotic events at the placenta and impairment of endometrial receptivity as well as disturbed fetal...