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Effects of post-core design and ferrule on fracture resistance of endodontically treated maxillary central incisors.
J Prosthet Dent. 2003 Apr; 89(4):368-73.JP

Abstract

STATEMENT OF PROBLEM

Studies concerning the effects of post-core design and ferrule on the fracture resistance of endodontically treated teeth remain controversial.

PURPOSE

The purpose of this study was to investigate in vitro the effects of post-core design and ferrule on the fracture resistance of root canal treated human maxillary central incisors restored with metal ceramic crowns.

MATERIAL AND METHODS

Forty-eight extracted human maxillary central incisors were endodontically treated and divided into 4 groups of 12. The following treatments were evaluated: group A: restored with metal ceramic (porcelain fused to metal [PFM]) crowns as control; group B: 2-mm ferrule/custom cast post-core/PFM crowns; group C: no ferrule/custom cast post-core/PFM crowns; and group D: 2-mm ferrule/prefabricated post and resin core/PFM crowns. Each specimen was subjected to load (N) on the lingual surface at a 135-degree angle to the long axis with a MTS 810 material testing machine until fracture at a crosshead speed of 0.02 cm/min. One-way analysis of variance and nonparametric chi-square test were used to compare the results. A significant analysis of variance result was followed by Newman-Keuls pairwise multiple comparisons (P<.05).

RESULTS

There were significant differences among the 4 groups studied (P<.01). Group B had the highest fracture strength (1793.59 +/- 387.93 N). There was no significant difference among the fracture resistances of the other 3 groups (group A: 958.49 +/- 286.02 N; group C: 992.98 +/- 291.00 N; group D: 994.94 +/- 285.04 N).

CONCLUSION

Within the limitations of this study, not all of the post-core structures tested improved the strength of the endodontically treated teeth. Those prepared with a 2-mm dentin ferrule more effectively enhanced the fracture strength of custom cast post-core restored endodontically treated maxillary central incisors.

Authors+Show Affiliations

Department of Dentistry, Beijing Hospital, Beijing, People's Republic of China. zhiyuel@263.netNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

12690349

Citation

Zhi-Yue, Lu, and Zhang Yu-Xing. "Effects of Post-core Design and Ferrule On Fracture Resistance of Endodontically Treated Maxillary Central Incisors." The Journal of Prosthetic Dentistry, vol. 89, no. 4, 2003, pp. 368-73.
Zhi-Yue L, Yu-Xing Z. Effects of post-core design and ferrule on fracture resistance of endodontically treated maxillary central incisors. J Prosthet Dent. 2003;89(4):368-73.
Zhi-Yue, L., & Yu-Xing, Z. (2003). Effects of post-core design and ferrule on fracture resistance of endodontically treated maxillary central incisors. The Journal of Prosthetic Dentistry, 89(4), 368-73.
Zhi-Yue L, Yu-Xing Z. Effects of Post-core Design and Ferrule On Fracture Resistance of Endodontically Treated Maxillary Central Incisors. J Prosthet Dent. 2003;89(4):368-73. PubMed PMID: 12690349.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of post-core design and ferrule on fracture resistance of endodontically treated maxillary central incisors. AU - Zhi-Yue,Lu, AU - Yu-Xing,Zhang, PY - 2003/4/12/pubmed PY - 2003/7/11/medline PY - 2003/4/12/entrez SP - 368 EP - 73 JF - The Journal of prosthetic dentistry JO - J Prosthet Dent VL - 89 IS - 4 N2 - STATEMENT OF PROBLEM: Studies concerning the effects of post-core design and ferrule on the fracture resistance of endodontically treated teeth remain controversial. PURPOSE: The purpose of this study was to investigate in vitro the effects of post-core design and ferrule on the fracture resistance of root canal treated human maxillary central incisors restored with metal ceramic crowns. MATERIAL AND METHODS: Forty-eight extracted human maxillary central incisors were endodontically treated and divided into 4 groups of 12. The following treatments were evaluated: group A: restored with metal ceramic (porcelain fused to metal [PFM]) crowns as control; group B: 2-mm ferrule/custom cast post-core/PFM crowns; group C: no ferrule/custom cast post-core/PFM crowns; and group D: 2-mm ferrule/prefabricated post and resin core/PFM crowns. Each specimen was subjected to load (N) on the lingual surface at a 135-degree angle to the long axis with a MTS 810 material testing machine until fracture at a crosshead speed of 0.02 cm/min. One-way analysis of variance and nonparametric chi-square test were used to compare the results. A significant analysis of variance result was followed by Newman-Keuls pairwise multiple comparisons (P<.05). RESULTS: There were significant differences among the 4 groups studied (P<.01). Group B had the highest fracture strength (1793.59 +/- 387.93 N). There was no significant difference among the fracture resistances of the other 3 groups (group A: 958.49 +/- 286.02 N; group C: 992.98 +/- 291.00 N; group D: 994.94 +/- 285.04 N). CONCLUSION: Within the limitations of this study, not all of the post-core structures tested improved the strength of the endodontically treated teeth. Those prepared with a 2-mm dentin ferrule more effectively enhanced the fracture strength of custom cast post-core restored endodontically treated maxillary central incisors. SN - 0022-3913 UR - https://www.unboundmedicine.com/medline/citation/12690349/Effects_of_post_core_design_and_ferrule_on_fracture_resistance_of_endodontically_treated_maxillary_central_incisors_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0022391303000052 DB - PRIME DP - Unbound Medicine ER -