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Effect of resin-based materials on fracture resistance of endodontically treated thin-walled teeth.
J Prosthet Dent. 2013 May; 109(5):296-303.JP

Abstract

STATEMENT OF PROBLEM

Composite resins are recommended for root reinforcement, but little information exists about self-adhesive resin cements that eliminate the acid etching and bonding steps.

PURPOSE

The purpose of this study was to compare the fracture resistances of teeth restored with 2 different diameters of cast and fiber posts and to evaluate the effectiveness of increasing internal root thickness with 2 resin-based materials to reinforce thin-walled teeth.

MATERIAL AND METHODS

Ninety maxillary incisors were endodontically treated and divided into 9 groups. In the first 4 groups, teeth were restored with tapered end cast (C1.3 and C1.7) and fiber (F1.3 and F1.7) posts of 1.3 and 1.7 mm diameters. In the other 5 groups, the root canals were enlarged to simulate the thin-walled teeth and restored with low viscosity composite resin with fiber posts of 1.3 and 1.7 mm diameters (LF1.3 and LF1.7), self-adhesive resin cement with fiber posts of 1.3 and 1.7 mm diameters (SF1.3 and SF1.7), and cast posts of 4 mm diameter that fit in post spaces (C4). Teeth were loaded to fracture at a 135-degree angle to their long axis. Data were analyzed with 2-way ANOVA and the Tukey HSD test (α=.05).

RESULTS

Significant difference (P<.001) existed between the fracture resistances of the teeth restored with cast (C1.3, 588.4 ±72.7 N) and fiber (F1.3, 375.3 ±53.8 N) posts of 1.3 mm diameter; however, no significant difference was found between 1.3 and 1.7 mm post diameters. The teeth restored with the resin-based materials with fiber posts, groups SF1.3 (331.6 ±135.2 N), SF1.7 (535.7 ±134.4 N), LF1.3 (432.1 ±120.3 N) and LF1.7 (563.8 ±128.8 N), demonstrated fracture resistance values similar to or higher than those of the teeth restored with the fiber posts, groups F1.3 (375.3 ±53.8 N) and F1.7 (461.8 ±98.4 N). The parallel-sided cast posts C4 (799.8 ±228.9 N) of 4 mm diameter demonstrated the highest fracture resistance of all groups (P<.001).

CONCLUSIONS

The fracture resistance of the teeth increased as the elastic modulus of the posts increased but was not affected by small diameter variations of the posts. The resin-based materials were able to preserve and reinforce the remaining tooth structures.

Authors+Show Affiliations

Department of Prosthetics, Faculty of Dentistry, Istanbul University, Istanbul, Turkey. mcbalkaya@yahoo.comNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

23684279

Citation

Balkaya, Mehmet Cudi, and Ilda Sinem Birdal. "Effect of Resin-based Materials On Fracture Resistance of Endodontically Treated Thin-walled Teeth." The Journal of Prosthetic Dentistry, vol. 109, no. 5, 2013, pp. 296-303.
Balkaya MC, Birdal IS. Effect of resin-based materials on fracture resistance of endodontically treated thin-walled teeth. J Prosthet Dent. 2013;109(5):296-303.
Balkaya, M. C., & Birdal, I. S. (2013). Effect of resin-based materials on fracture resistance of endodontically treated thin-walled teeth. The Journal of Prosthetic Dentistry, 109(5), 296-303. https://doi.org/10.1016/S0022-3913(13)60304-2
Balkaya MC, Birdal IS. Effect of Resin-based Materials On Fracture Resistance of Endodontically Treated Thin-walled Teeth. J Prosthet Dent. 2013;109(5):296-303. PubMed PMID: 23684279.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effect of resin-based materials on fracture resistance of endodontically treated thin-walled teeth. AU - Balkaya,Mehmet Cudi, AU - Birdal,Ilda Sinem, PY - 2013/5/21/entrez PY - 2013/5/21/pubmed PY - 2014/2/22/medline SP - 296 EP - 303 JF - The Journal of prosthetic dentistry JO - J Prosthet Dent VL - 109 IS - 5 N2 - STATEMENT OF PROBLEM: Composite resins are recommended for root reinforcement, but little information exists about self-adhesive resin cements that eliminate the acid etching and bonding steps. PURPOSE: The purpose of this study was to compare the fracture resistances of teeth restored with 2 different diameters of cast and fiber posts and to evaluate the effectiveness of increasing internal root thickness with 2 resin-based materials to reinforce thin-walled teeth. MATERIAL AND METHODS: Ninety maxillary incisors were endodontically treated and divided into 9 groups. In the first 4 groups, teeth were restored with tapered end cast (C1.3 and C1.7) and fiber (F1.3 and F1.7) posts of 1.3 and 1.7 mm diameters. In the other 5 groups, the root canals were enlarged to simulate the thin-walled teeth and restored with low viscosity composite resin with fiber posts of 1.3 and 1.7 mm diameters (LF1.3 and LF1.7), self-adhesive resin cement with fiber posts of 1.3 and 1.7 mm diameters (SF1.3 and SF1.7), and cast posts of 4 mm diameter that fit in post spaces (C4). Teeth were loaded to fracture at a 135-degree angle to their long axis. Data were analyzed with 2-way ANOVA and the Tukey HSD test (α=.05). RESULTS: Significant difference (P<.001) existed between the fracture resistances of the teeth restored with cast (C1.3, 588.4 ±72.7 N) and fiber (F1.3, 375.3 ±53.8 N) posts of 1.3 mm diameter; however, no significant difference was found between 1.3 and 1.7 mm post diameters. The teeth restored with the resin-based materials with fiber posts, groups SF1.3 (331.6 ±135.2 N), SF1.7 (535.7 ±134.4 N), LF1.3 (432.1 ±120.3 N) and LF1.7 (563.8 ±128.8 N), demonstrated fracture resistance values similar to or higher than those of the teeth restored with the fiber posts, groups F1.3 (375.3 ±53.8 N) and F1.7 (461.8 ±98.4 N). The parallel-sided cast posts C4 (799.8 ±228.9 N) of 4 mm diameter demonstrated the highest fracture resistance of all groups (P<.001). CONCLUSIONS: The fracture resistance of the teeth increased as the elastic modulus of the posts increased but was not affected by small diameter variations of the posts. The resin-based materials were able to preserve and reinforce the remaining tooth structures. SN - 1097-6841 UR - https://www.unboundmedicine.com/medline/citation/23684279/Effect_of_resin_based_materials_on_fracture_resistance_of_endodontically_treated_thin_walled_teeth_ DB - PRIME DP - Unbound Medicine ER -