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Effect of core bonding on fatigue failure of compromised teeth.
Int J Prosthodont. 2002 Mar-Apr; 15(2):175-8.IJ

Abstract

PURPOSE

This study determined the effect of bonding a composite core on the number of load cycles to cement failure for teeth restored with complete crowns.

MATERIALS AND METHODS

Ten extracted human maxillary central incisors were divided into two groups of five each. The tooth roots were at least 11 mm long, allowing an 8-mm post. Under copious irrigation, each tooth was cut to a flat plane 1 mm coronal to the buccal cementoenamel junction, perpendicular to the long axis of the tooth. The canal space was prepared to a final diameter of 1.25 mm, 8 mm deep. Each tooth was rebuilt with a 050 Parapost and Corestore. Final preparation height was 7 mm, including a 1-mm ferrule. For group 1, the core was bonded to the dentin using autocured Scotchbond Multipurpose Plus. For group 2, the core was not bonded. Following crown cementation, all teeth were subjected to a fatigue load of 4 kg at a rate of 280 cycles per minute.

RESULTS

One tooth with a bonded core failed at 19,880 cycles, and the other four in this group did not fail after 100,000 cycles. All of the teeth without a bonded core failed at a cycle count of less than 100. The Mann-Whitney nonparametric test showed a significant difference between the two groups (P < .01).

CONCLUSION

Bonding of a composite core to dentin prior to crown cementation provided a significantly stronger crown retention under fatigue loading.

Authors+Show Affiliations

National Yang-Ming University School of Dentistry, Taipei, Taiwan.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

11951808

Citation

Hsu, Yu Bin, et al. "Effect of Core Bonding On Fatigue Failure of Compromised Teeth." The International Journal of Prosthodontics, vol. 15, no. 2, 2002, pp. 175-8.
Hsu YB, Nicholls JI, Phillips KM, et al. Effect of core bonding on fatigue failure of compromised teeth. Int J Prosthodont. 2002;15(2):175-8.
Hsu, Y. B., Nicholls, J. I., Phillips, K. M., & Libman, W. J. (2002). Effect of core bonding on fatigue failure of compromised teeth. The International Journal of Prosthodontics, 15(2), 175-8.
Hsu YB, et al. Effect of Core Bonding On Fatigue Failure of Compromised Teeth. Int J Prosthodont. 2002 Mar-Apr;15(2):175-8. PubMed PMID: 11951808.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effect of core bonding on fatigue failure of compromised teeth. AU - Hsu,Yu Bin, AU - Nicholls,Jack I, AU - Phillips,Keith M, AU - Libman,Warren J, PY - 2002/4/16/pubmed PY - 2002/8/7/medline PY - 2002/4/16/entrez SP - 175 EP - 8 JF - The International journal of prosthodontics JO - Int J Prosthodont VL - 15 IS - 2 N2 - PURPOSE: This study determined the effect of bonding a composite core on the number of load cycles to cement failure for teeth restored with complete crowns. MATERIALS AND METHODS: Ten extracted human maxillary central incisors were divided into two groups of five each. The tooth roots were at least 11 mm long, allowing an 8-mm post. Under copious irrigation, each tooth was cut to a flat plane 1 mm coronal to the buccal cementoenamel junction, perpendicular to the long axis of the tooth. The canal space was prepared to a final diameter of 1.25 mm, 8 mm deep. Each tooth was rebuilt with a 050 Parapost and Corestore. Final preparation height was 7 mm, including a 1-mm ferrule. For group 1, the core was bonded to the dentin using autocured Scotchbond Multipurpose Plus. For group 2, the core was not bonded. Following crown cementation, all teeth were subjected to a fatigue load of 4 kg at a rate of 280 cycles per minute. RESULTS: One tooth with a bonded core failed at 19,880 cycles, and the other four in this group did not fail after 100,000 cycles. All of the teeth without a bonded core failed at a cycle count of less than 100. The Mann-Whitney nonparametric test showed a significant difference between the two groups (P < .01). CONCLUSION: Bonding of a composite core to dentin prior to crown cementation provided a significantly stronger crown retention under fatigue loading. SN - 0893-2174 UR - https://www.unboundmedicine.com/medline/citation/11951808/Effect_of_core_bonding_on_fatigue_failure_of_compromised_teeth_ DB - PRIME DP - Unbound Medicine ER -