Tags

Type your tag names separated by a space and hit enter

Fracture resistance of teeth restored with endocrowns: An in vitro study.
J Esthet Restor Dent. 2020 Jun; 32(4):389-394.JE

Abstract

OBJECTIVE

The objective of this study is to evaluate the fracture resistance and failure mode of endodontically treated teeth restored with lithium disilicate endocrowns of different crown thicknesses.

MATERIALS AND METHODS

A total of 30 endodontically treated permanent mandibular first molars were sectioned horizontally 2 mm above the highest point of the cemento-enamel junction. The specimens were divided into three groups, and each group was restored with lithium disilicate (IPS e-max press) endocrowns of different crown thicknesses (3, 4.5, and 6 mm, respectively). After cementation, specimens were stored in room temperature for 72 hours, followed by subjecting them to compressive strength testing until failure. The fracture loads and the failure mode were recorded. Statistically analysis was performed using one-way analysis of variance.

RESULTS

A statistically significant difference was found in the fracture resistance between the three groups with the highest fracture resistance in the 3 mm group, followed by the 4.5 mm group, and the least in the 6 mm group (P < .05). Most of the failures were accompanied with tooth fracture (90% in 3 mm group, 100% in 4.5 mm group, and 80% in 6 mm group).

CONCLUSIONS

Increasing the crown thickness of the endocrowns reduced the fracture resistance of restored teeth. Minimum fracture loads for all teeth restored with endocrowns were significantly higher than the maximum occlusal forces reported in the literature.

CLINICAL SIGNIFICANCE

Fracture resistance and mode of failure of lithium disilicate (IPS e-max press) endocrowns varies widely between crown thicknesses. Clinicians should be cautious with crown thickness for endocrown restorations.

Authors+Show Affiliations

Prosthodontic Department, King Saud Medical City, Riyadh, Saudi Arabia.Prosthodontic Department, Dar Al Uloom University, Riyadh, Saudi Arabia.Prosthodontic Department, Riyadh Elm University, Riyadh, Saudi Arabia.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31743558

Citation

Turkistani, Ahmed A., et al. "Fracture Resistance of Teeth Restored With Endocrowns: an in Vitro Study." Journal of Esthetic and Restorative Dentistry : Official Publication of the American Academy of Esthetic Dentistry ... [et Al.], vol. 32, no. 4, 2020, pp. 389-394.
Turkistani AA, Dimashkieh M, Rayyan M. Fracture resistance of teeth restored with endocrowns: An in vitro study. J Esthet Restor Dent. 2020;32(4):389-394.
Turkistani, A. A., Dimashkieh, M., & Rayyan, M. (2020). Fracture resistance of teeth restored with endocrowns: An in vitro study. Journal of Esthetic and Restorative Dentistry : Official Publication of the American Academy of Esthetic Dentistry ... [et Al.], 32(4), 389-394. https://doi.org/10.1111/jerd.12549
Turkistani AA, Dimashkieh M, Rayyan M. Fracture Resistance of Teeth Restored With Endocrowns: an in Vitro Study. J Esthet Restor Dent. 2020;32(4):389-394. PubMed PMID: 31743558.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Fracture resistance of teeth restored with endocrowns: An in vitro study. AU - Turkistani,Ahmed A, AU - Dimashkieh,Mohiddin, AU - Rayyan,Mohammed, Y1 - 2019/11/19/ PY - 2019/07/30/received PY - 2019/10/27/accepted PY - 2019/11/20/pubmed PY - 2020/7/28/medline PY - 2019/11/20/entrez KW - endocrowns KW - endodontically treated teeth KW - failure mode KW - fracture resistance KW - lithium disilicate SP - 389 EP - 394 JF - Journal of esthetic and restorative dentistry : official publication of the American Academy of Esthetic Dentistry ... [et al.] JO - J Esthet Restor Dent VL - 32 IS - 4 N2 - OBJECTIVE: The objective of this study is to evaluate the fracture resistance and failure mode of endodontically treated teeth restored with lithium disilicate endocrowns of different crown thicknesses. MATERIALS AND METHODS: A total of 30 endodontically treated permanent mandibular first molars were sectioned horizontally 2 mm above the highest point of the cemento-enamel junction. The specimens were divided into three groups, and each group was restored with lithium disilicate (IPS e-max press) endocrowns of different crown thicknesses (3, 4.5, and 6 mm, respectively). After cementation, specimens were stored in room temperature for 72 hours, followed by subjecting them to compressive strength testing until failure. The fracture loads and the failure mode were recorded. Statistically analysis was performed using one-way analysis of variance. RESULTS: A statistically significant difference was found in the fracture resistance between the three groups with the highest fracture resistance in the 3 mm group, followed by the 4.5 mm group, and the least in the 6 mm group (P < .05). Most of the failures were accompanied with tooth fracture (90% in 3 mm group, 100% in 4.5 mm group, and 80% in 6 mm group). CONCLUSIONS: Increasing the crown thickness of the endocrowns reduced the fracture resistance of restored teeth. Minimum fracture loads for all teeth restored with endocrowns were significantly higher than the maximum occlusal forces reported in the literature. CLINICAL SIGNIFICANCE: Fracture resistance and mode of failure of lithium disilicate (IPS e-max press) endocrowns varies widely between crown thicknesses. Clinicians should be cautious with crown thickness for endocrown restorations. SN - 1708-8240 UR - https://www.unboundmedicine.com/medline/citation/31743558/Fracture_resistance_of_teeth_restored_with_endocrowns:_An_in_vitro_study_ L2 - https://doi.org/10.1111/jerd.12549 DB - PRIME DP - Unbound Medicine ER -