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[Influence of post-core on the strength of endodontically treated and crowned teeth].
Zhonghua Kou Qiang Yi Xue Za Zhi. 2002 Jan; 37(1):43-6.ZK

Abstract

OBJECTIVE

To investigate the influence of post-core structure on the strength of endodontically treated and crowned teeth with or without a 2.0 mm dentine ferrule.

METHODS

A total of 60 recently extracted human maxillary central incisors were endodontically treated and randomly divided into five groups of 12. They were given following treatments: Group A, endodontically treated; Group B, endodontically treated and crowned (PFM); Group C, cast metal post-core with 2.0 mm dentine ferrule and crowned (PFM); Group D, cast metal post-core with no dentine ferrule and crowned (PFM); Group E, prefabricated post and composite core with 2.0 mm dentine ferrule and crowned (PFM). All specimens were stored at 100% humidity at room temperature for 30 days before testing. Each specimen was in a special jig on the MTS 810 universal material testing machine and subjected to a load at a 135-degree angle to the long axis until failure, with crosshead speed of 0.02 cm/minute. Analysis of variance followed by the Newman-Keuls pairwise multiple comparison tests was used to compare the results.

RESULTS

There was a statistically significant difference between different restorative methods. The cast metal post-core with 2.0 mm dentine ferrule and crowned teeth had the highest fracture strength (1793.59 +/- 387.93N), followed by endodontically treated intact teeth (1466.68 +/- 240.11N). No significant difference in the fracture strength was found among the other three groups (958.49 +/- 286.02N; 992.98 +/- 291.00N; 994.94 +/- 285.04 N). There was a statistically significant difference in the fracture resistance between crowned teeth with and without 2.0 mm dentine ferrule (P < 0.01).

CONCLUSIONS

Not all post-core structure could improve the strength of endodontically treated teeth. The dentine ferrule can effectively improve the fracture resistance of endodontically treated and crowned teeth.

Authors+Show Affiliations

Department of Dentistry, Beijing Hospital, Beijing 100730, China.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

English Abstract
Journal Article

Language

chi

PubMed ID

11955361

Citation

Lu, Zhiyue, et al. "[Influence of Post-core On the Strength of Endodontically Treated and Crowned Teeth]." Zhonghua Kou Qiang Yi Xue Za Zhi = Zhonghua Kouqiang Yixue Zazhi = Chinese Journal of Stomatology, vol. 37, no. 1, 2002, pp. 43-6.
Lu Z, Zhang Y, Zhang W, et al. [Influence of post-core on the strength of endodontically treated and crowned teeth]. Zhonghua Kou Qiang Yi Xue Za Zhi. 2002;37(1):43-6.
Lu, Z., Zhang, Y., Zhang, W., & Wang, M. (2002). [Influence of post-core on the strength of endodontically treated and crowned teeth]. Zhonghua Kou Qiang Yi Xue Za Zhi = Zhonghua Kouqiang Yixue Zazhi = Chinese Journal of Stomatology, 37(1), 43-6.
Lu Z, et al. [Influence of Post-core On the Strength of Endodontically Treated and Crowned Teeth]. Zhonghua Kou Qiang Yi Xue Za Zhi. 2002;37(1):43-6. PubMed PMID: 11955361.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - [Influence of post-core on the strength of endodontically treated and crowned teeth]. AU - Lu,Zhiyue, AU - Zhang,Yuxing, AU - Zhang,Weihong, AU - Wang,Mengtao, PY - 2002/4/17/pubmed PY - 2002/5/17/medline PY - 2002/4/17/entrez SP - 43 EP - 6 JF - Zhonghua kou qiang yi xue za zhi = Zhonghua kouqiang yixue zazhi = Chinese journal of stomatology JO - Zhonghua Kou Qiang Yi Xue Za Zhi VL - 37 IS - 1 N2 - OBJECTIVE: To investigate the influence of post-core structure on the strength of endodontically treated and crowned teeth with or without a 2.0 mm dentine ferrule. METHODS: A total of 60 recently extracted human maxillary central incisors were endodontically treated and randomly divided into five groups of 12. They were given following treatments: Group A, endodontically treated; Group B, endodontically treated and crowned (PFM); Group C, cast metal post-core with 2.0 mm dentine ferrule and crowned (PFM); Group D, cast metal post-core with no dentine ferrule and crowned (PFM); Group E, prefabricated post and composite core with 2.0 mm dentine ferrule and crowned (PFM). All specimens were stored at 100% humidity at room temperature for 30 days before testing. Each specimen was in a special jig on the MTS 810 universal material testing machine and subjected to a load at a 135-degree angle to the long axis until failure, with crosshead speed of 0.02 cm/minute. Analysis of variance followed by the Newman-Keuls pairwise multiple comparison tests was used to compare the results. RESULTS: There was a statistically significant difference between different restorative methods. The cast metal post-core with 2.0 mm dentine ferrule and crowned teeth had the highest fracture strength (1793.59 +/- 387.93N), followed by endodontically treated intact teeth (1466.68 +/- 240.11N). No significant difference in the fracture strength was found among the other three groups (958.49 +/- 286.02N; 992.98 +/- 291.00N; 994.94 +/- 285.04 N). There was a statistically significant difference in the fracture resistance between crowned teeth with and without 2.0 mm dentine ferrule (P < 0.01). CONCLUSIONS: Not all post-core structure could improve the strength of endodontically treated teeth. The dentine ferrule can effectively improve the fracture resistance of endodontically treated and crowned teeth. SN - 1002-0098 UR - https://www.unboundmedicine.com/medline/citation/11955361/[Influence_of_post_core_on_the_strength_of_endodontically_treated_and_crowned_teeth]_ L2 - http://journal.yiigle.com/LinkIn.do?linkin_type=pubmed&amp;issn=1002-0098&amp;year=2002&amp;vol=37&amp;issue=1&amp;fpage=43 DB - PRIME DP - Unbound Medicine ER -