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The effect of ferrule on the fracture mode of endodontically treated canines restored with fibre posts and metal-ceramic or all-ceramic crowns.
J Dent. 2012 Apr; 40(4):276-85.JD

Abstract

OBJECTIVES

The aim of this study was to evaluate the fracture mode of endodontically treated canines (ETC) restored with glass-fibre posts (GFP) and either metal-ceramic (MC) or all-ceramic (AC) crowns, in the presence or absence of 2 mm ferrule height.

METHODS

Fifty recently extracted human maxillary canines were endodontically treated and randomly divided into 5 groups of 10 specimens each. Four groups (with or without ferrule) were restored with GFP, composite cores and either MC or AC crowns. The fifth group with intact ETC served as control. Teeth were loaded to fracture at a 135° angle to their long axis, at a cross-head speed 0.5 mm/min. The fracture modes were divided through optical microscopy to repairable and irreparable. Statistical analysis was performed by means of the Fisher's Exact test.

RESULTS

All groups presented brittle fracture following bending deformation. Irreparable root fractures were the primary fracture mode independently of ferrule. The percentages (%) of repairable fractures were not statistically significant different amongst the MC and AC restored teeth independently of ferrule. However the 2 mm ferrule was associated to a higher percentage of repairable fractures, especially in teeth restored with AC crowns.

CONCLUSIONS

The percentage (%) of repairable fractures was higher in all-ceramic compared to metal-ceramic ETC and in restorations with ferrule, although the differences were not statistically significant.

CLINICAL SIGNIFICANCE

This in vitro study supports evidence that neither the type of crown restoration nor the presence of ferrule affects statistically significantly the mode of fracture of ETC restored with GFP.

Authors+Show Affiliations

Department of Fixed Prosthesis and Implant Prosthodontics, School of Dentistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Randomized Controlled Trial

Language

eng

PubMed ID

22265988

Citation

Fragou, Theodora, et al. "The Effect of Ferrule On the Fracture Mode of Endodontically Treated Canines Restored With Fibre Posts and Metal-ceramic or All-ceramic Crowns." Journal of Dentistry, vol. 40, no. 4, 2012, pp. 276-85.
Fragou T, Tortopidis D, Kontonasaki E, et al. The effect of ferrule on the fracture mode of endodontically treated canines restored with fibre posts and metal-ceramic or all-ceramic crowns. J Dent. 2012;40(4):276-85.
Fragou, T., Tortopidis, D., Kontonasaki, E., Evangelinaki, E., Ioannidis, K., Petridis, H., & Koidis, P. (2012). The effect of ferrule on the fracture mode of endodontically treated canines restored with fibre posts and metal-ceramic or all-ceramic crowns. Journal of Dentistry, 40(4), 276-85. https://doi.org/10.1016/j.jdent.2012.01.002
Fragou T, et al. The Effect of Ferrule On the Fracture Mode of Endodontically Treated Canines Restored With Fibre Posts and Metal-ceramic or All-ceramic Crowns. J Dent. 2012;40(4):276-85. PubMed PMID: 22265988.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The effect of ferrule on the fracture mode of endodontically treated canines restored with fibre posts and metal-ceramic or all-ceramic crowns. AU - Fragou,Theodora, AU - Tortopidis,Dimitrios, AU - Kontonasaki,Eleana, AU - Evangelinaki,Evangelia, AU - Ioannidis,Konstantinos, AU - Petridis,Haralampos, AU - Koidis,Petros, Y1 - 2012/01/11/ PY - 2011/10/05/received PY - 2011/12/27/revised PY - 2012/01/02/accepted PY - 2012/1/24/entrez PY - 2012/1/24/pubmed PY - 2012/8/14/medline SP - 276 EP - 85 JF - Journal of dentistry JO - J Dent VL - 40 IS - 4 N2 - OBJECTIVES: The aim of this study was to evaluate the fracture mode of endodontically treated canines (ETC) restored with glass-fibre posts (GFP) and either metal-ceramic (MC) or all-ceramic (AC) crowns, in the presence or absence of 2 mm ferrule height. METHODS: Fifty recently extracted human maxillary canines were endodontically treated and randomly divided into 5 groups of 10 specimens each. Four groups (with or without ferrule) were restored with GFP, composite cores and either MC or AC crowns. The fifth group with intact ETC served as control. Teeth were loaded to fracture at a 135° angle to their long axis, at a cross-head speed 0.5 mm/min. The fracture modes were divided through optical microscopy to repairable and irreparable. Statistical analysis was performed by means of the Fisher's Exact test. RESULTS: All groups presented brittle fracture following bending deformation. Irreparable root fractures were the primary fracture mode independently of ferrule. The percentages (%) of repairable fractures were not statistically significant different amongst the MC and AC restored teeth independently of ferrule. However the 2 mm ferrule was associated to a higher percentage of repairable fractures, especially in teeth restored with AC crowns. CONCLUSIONS: The percentage (%) of repairable fractures was higher in all-ceramic compared to metal-ceramic ETC and in restorations with ferrule, although the differences were not statistically significant. CLINICAL SIGNIFICANCE: This in vitro study supports evidence that neither the type of crown restoration nor the presence of ferrule affects statistically significantly the mode of fracture of ETC restored with GFP. SN - 1879-176X UR - https://www.unboundmedicine.com/medline/citation/22265988/The_effect_of_ferrule_on_the_fracture_mode_of_endodontically_treated_canines_restored_with_fibre_posts_and_metal_ceramic_or_all_ceramic_crowns_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0300-5712(12)00011-5 DB - PRIME DP - Unbound Medicine ER -