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Resistance to fracture of endodontically treated teeth restored with different post systems.
J Prosthet Dent. 2002 Apr; 87(4):431-7.JP

Abstract

STATEMENT OF PROBLEM

Very little is known about the resistance to fracture of endodontically treated teeth restored with newly developed esthetic post systems. Purpose. This in vitro study compared the effect of 1 titanium and 3 esthetic post systems on the fracture resistance and fracture patterns of crowned, endodontically treated teeth.

MATERIAL AND METHODS

A total of 40 recently extracted human maxillary canines with their crowns removed were endodontically treated. Four groups of 10 specimens were formed. Teeth were restored with titanium, quartz fiber, glass fiber, and zirconia posts and numbered as groups 1, 2, 3, and 4, respectively. All posts were cemented with Single Bond dental adhesive system and dual-polymerizing RelyX ARC adhesive resin cement. All teeth were restored with composite cores, and metal crowns were fabricated and cemented with glass ionomer cement. Each specimen was embedded in acrylic resin and then secured in a universal load-testing machine. A compressive load was applied at a 130-degree angle to the long axis of the tooth until fracture, at a crosshead speed of 1 mm/min. One-way analysis of variance and a Tukey test were used to determine the significance of the failure loads between groups (P<.001). A non-parametric chi(2) test was conducted for evaluation of the mode of failure (P<.001).

RESULTS

The mean failure loads (kg) were 66.95, 91.20, 75.90, and 78.91 for groups 1 to 4, respectively. Teeth restored with quartz fiber posts (group 2) exhibited significantly higher resistance to fracture (P<.001) than the other 3 groups. Teeth restored with glass fiber and zirconia posts (groups 3 and 4) were statistically similar (P>.05). Fractures that would allow repair of the tooth were observed in groups 2 and 3, whereas unrestorable, catastrophic fractures were observed in groups 1 and 4 (P<.001).

CONCLUSION

Within the limitations of this study, significantly higher failure loads were recorded for root canal treated teeth restored with quartz fiber posts. Fractures that would allow repeated repair were observed in teeth restored with quartz fiber and glass fiber posts.

Authors+Show Affiliations

Departmentof Prosthtic Dentistry, Faculty of Dentistry, University of Istanbul, Turkey. bakkayan@yahoo.comNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

12011860

Citation

Akkayan, Begüm, and Turgut Gülmez. "Resistance to Fracture of Endodontically Treated Teeth Restored With Different Post Systems." The Journal of Prosthetic Dentistry, vol. 87, no. 4, 2002, pp. 431-7.
Akkayan B, Gülmez T. Resistance to fracture of endodontically treated teeth restored with different post systems. J Prosthet Dent. 2002;87(4):431-7.
Akkayan, B., & Gülmez, T. (2002). Resistance to fracture of endodontically treated teeth restored with different post systems. The Journal of Prosthetic Dentistry, 87(4), 431-7.
Akkayan B, Gülmez T. Resistance to Fracture of Endodontically Treated Teeth Restored With Different Post Systems. J Prosthet Dent. 2002;87(4):431-7. PubMed PMID: 12011860.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Resistance to fracture of endodontically treated teeth restored with different post systems. AU - Akkayan,Begüm, AU - Gülmez,Turgut, PY - 2002/5/16/pubmed PY - 2002/8/14/medline PY - 2002/5/16/entrez SP - 431 EP - 7 JF - The Journal of prosthetic dentistry JO - J Prosthet Dent VL - 87 IS - 4 N2 - STATEMENT OF PROBLEM: Very little is known about the resistance to fracture of endodontically treated teeth restored with newly developed esthetic post systems. Purpose. This in vitro study compared the effect of 1 titanium and 3 esthetic post systems on the fracture resistance and fracture patterns of crowned, endodontically treated teeth. MATERIAL AND METHODS: A total of 40 recently extracted human maxillary canines with their crowns removed were endodontically treated. Four groups of 10 specimens were formed. Teeth were restored with titanium, quartz fiber, glass fiber, and zirconia posts and numbered as groups 1, 2, 3, and 4, respectively. All posts were cemented with Single Bond dental adhesive system and dual-polymerizing RelyX ARC adhesive resin cement. All teeth were restored with composite cores, and metal crowns were fabricated and cemented with glass ionomer cement. Each specimen was embedded in acrylic resin and then secured in a universal load-testing machine. A compressive load was applied at a 130-degree angle to the long axis of the tooth until fracture, at a crosshead speed of 1 mm/min. One-way analysis of variance and a Tukey test were used to determine the significance of the failure loads between groups (P<.001). A non-parametric chi(2) test was conducted for evaluation of the mode of failure (P<.001). RESULTS: The mean failure loads (kg) were 66.95, 91.20, 75.90, and 78.91 for groups 1 to 4, respectively. Teeth restored with quartz fiber posts (group 2) exhibited significantly higher resistance to fracture (P<.001) than the other 3 groups. Teeth restored with glass fiber and zirconia posts (groups 3 and 4) were statistically similar (P>.05). Fractures that would allow repair of the tooth were observed in groups 2 and 3, whereas unrestorable, catastrophic fractures were observed in groups 1 and 4 (P<.001). CONCLUSION: Within the limitations of this study, significantly higher failure loads were recorded for root canal treated teeth restored with quartz fiber posts. Fractures that would allow repeated repair were observed in teeth restored with quartz fiber and glass fiber posts. SN - 0022-3913 UR - https://www.unboundmedicine.com/medline/citation/12011860/Resistance_to_fracture_of_endodontically_treated_teeth_restored_with_different_post_systems_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0022391302201390 DB - PRIME DP - Unbound Medicine ER -