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Fracture Resistance and Failure Pattern of Endodontically Treated Teeth Restored with Computer-aided Design/ Computer-aided Manufacturing Post and Cores: A Pilot Study.
J Contemp Dent Pract. 2019 Jan 01; 20(1):56-63.JC

Abstract

AIM

To evaluate the fracture resistance and failure pattern of custom made computer-aided design & computer-aided manufacturing (CAD/CAM) post and cores using a fiber reinforced composite material (FRC) and a high-density-polymer.

MATERIALS AND METHODS

Thirty extracted mandibular second premolars were selected, endodontically treated and prepared to receive the posts. The specimens were randomly divided into three groups (n = 10) according to each material: group 1 (RXP) : fiber posts (Rely X, 3M-ESPE) with composite core build-up (Filtek Bulk Fill Posterior, 3M-ESPE) as a control group; group 2 (BLC): one-piece milled post and core from fiber reinforced composite blocks (Trilor, Bioloren); and group 3 (AMC): one-piece milled post and core from hybrid ceramic disks (Ambarino, Creamed). All the posts were cemented using a self-adhesive resin cement (Rely X U200, 3M ESPE). Fracture resistance was tested using a universal testing machine, failure patterns were then observed visually and radiographically then evaluated under SEM. Data was analyzed using One-way analysis of variance (ANOVA) followed by Tamhane post-hoc test in order to determine significant differences among groups (α = 0.05).

RESULTS

The mean fracture resistance values were: 426.08 ± 128.26 N for group 1 (R X P), 367.06 ± 72.34N for group 2 (BLC), and 620.02 ± 54.29N for group 3 (AMC). Statistical analysis revealed that group 3 (AMC) had the highest mean load to fracture in comparison to the other groups (p = 0.000). failures were cohesive in group 2 and 3 and mixed in group 1 with no catastrophic failures reported in all groups.

CONCLUSION

All systems evaluated presented sufficient mean load-to-failure values for endodontically treated teeth restorations. CAD/CAM post and cores made from high-density-polymer showed a better performance than prefabricated fiber posts.

Authors+Show Affiliations

Department of Prosthodontics, Faculty of Dental Medicine, Lebanese University, Beirut, Lebanon, Mobile: 09613695576, e-mail: ritayeid@yahoo.com.Department of Pediatrics and Preventive Dentistry, Faculty of Dental Medicine, University of Belgrade, Serbia.Department of Restorative Dentistry and Endodontics, Faculty of Dental Medicine Lebanese University, Beirut, Lebanon.Department of Prosthodontics, Silwaidi Dental Center, Abu Dhabi, Digital Dentistry Unit, Faculty of Dental Medicine, Lebanese University, Beirut, Lebanon.Department of Medical Biotechnologies, Division of Fixed Prosthodontics, University of Siena, Siena, Italy.Research Center, Faculty of Dental Medicine, Lebanese University, Beirut, Lebanon.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31102396

Citation

Eid, Rita, et al. "Fracture Resistance and Failure Pattern of Endodontically Treated Teeth Restored With Computer-aided Design/ Computer-aided Manufacturing Post and Cores: a Pilot Study." The Journal of Contemporary Dental Practice, vol. 20, no. 1, 2019, pp. 56-63.
Eid R, Juloski J, Ounsi H, et al. Fracture Resistance and Failure Pattern of Endodontically Treated Teeth Restored with Computer-aided Design/ Computer-aided Manufacturing Post and Cores: A Pilot Study. J Contemp Dent Pract. 2019;20(1):56-63.
Eid, R., Juloski, J., Ounsi, H., Silwaidi, M., Ferrari, M., & Salameh, Z. (2019). Fracture Resistance and Failure Pattern of Endodontically Treated Teeth Restored with Computer-aided Design/ Computer-aided Manufacturing Post and Cores: A Pilot Study. The Journal of Contemporary Dental Practice, 20(1), 56-63.
Eid R, et al. Fracture Resistance and Failure Pattern of Endodontically Treated Teeth Restored With Computer-aided Design/ Computer-aided Manufacturing Post and Cores: a Pilot Study. J Contemp Dent Pract. 2019 Jan 1;20(1):56-63. PubMed PMID: 31102396.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Fracture Resistance and Failure Pattern of Endodontically Treated Teeth Restored with Computer-aided Design/ Computer-aided Manufacturing Post and Cores: A Pilot Study. AU - Eid,Rita, AU - Juloski,Jelena, AU - Ounsi,Hani, AU - Silwaidi,Munir, AU - Ferrari,Marco, AU - Salameh,Ziad, Y1 - 2019/01/01/ PY - 2019/5/19/entrez PY - 2019/5/19/pubmed PY - 2019/10/30/medline KW - Fiber reinforced composite KW - Fracture resistance Laboratory test. KW - High-density polymer KW - One-piece post and core SP - 56 EP - 63 JF - The journal of contemporary dental practice JO - J Contemp Dent Pract VL - 20 IS - 1 N2 - AIM: To evaluate the fracture resistance and failure pattern of custom made computer-aided design & computer-aided manufacturing (CAD/CAM) post and cores using a fiber reinforced composite material (FRC) and a high-density-polymer. MATERIALS AND METHODS: Thirty extracted mandibular second premolars were selected, endodontically treated and prepared to receive the posts. The specimens were randomly divided into three groups (n = 10) according to each material: group 1 (RXP) : fiber posts (Rely X, 3M-ESPE) with composite core build-up (Filtek Bulk Fill Posterior, 3M-ESPE) as a control group; group 2 (BLC): one-piece milled post and core from fiber reinforced composite blocks (Trilor, Bioloren); and group 3 (AMC): one-piece milled post and core from hybrid ceramic disks (Ambarino, Creamed). All the posts were cemented using a self-adhesive resin cement (Rely X U200, 3M ESPE). Fracture resistance was tested using a universal testing machine, failure patterns were then observed visually and radiographically then evaluated under SEM. Data was analyzed using One-way analysis of variance (ANOVA) followed by Tamhane post-hoc test in order to determine significant differences among groups (α = 0.05). RESULTS: The mean fracture resistance values were: 426.08 ± 128.26 N for group 1 (R X P), 367.06 ± 72.34N for group 2 (BLC), and 620.02 ± 54.29N for group 3 (AMC). Statistical analysis revealed that group 3 (AMC) had the highest mean load to fracture in comparison to the other groups (p = 0.000). failures were cohesive in group 2 and 3 and mixed in group 1 with no catastrophic failures reported in all groups. CONCLUSION: All systems evaluated presented sufficient mean load-to-failure values for endodontically treated teeth restorations. CAD/CAM post and cores made from high-density-polymer showed a better performance than prefabricated fiber posts. SN - 1526-3711 UR - https://www.unboundmedicine.com/medline/citation/31102396/Fracture_Resistance_and_Failure_Pattern_of_Endodontically_Treated_Teeth_Restored_with_Computer_aided_Design/_Computer_aided_Manufacturing_Post_and_Cores:_A_Pilot_Study_ DB - PRIME DP - Unbound Medicine ER -