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Fracture resistance of root canal-treated molars restored with ceramic overlays with/without different resin composite base materials: an in vitro study.
Odontology. 2022 Jul; 110(3):497-507.O

Abstract

The objective of the study was to evaluate the effect of different restorative protocols on fracture resistance of root canal-treated molars. 48 mandibular first molars were used and divided into six groups (n = 8); G1 (negative control): teeth kept intact. G2 (positive control): teeth had root canal treatment and standard MOD cavity preparations but kept unrestored. G3: prepared as G2 and directly restored with VitaEnamic ceramic overlays (CO). G4: as G3, but the pulp chamber was restored first with smart dental restorative (SureFil SDR flow = SDR) bulk-fill flowable composite base. G5: as G3, but the pulp chamber was restored first with SonicFill (SF) bulk-fill composite base. G6: as G3, but the pulp chamber was restored first with a fiber-reinforced composite (FRC) base. All samples were subjected to thermocycling between 5 °C and 55 °C in a water bath for a total of 2000 cycles with 10 s dwell time. Then specimens were individually mounted on a computer-controlled testing machine with a load cell of 5 kN, and the maximum load to produce fracture (N) was recorded. Data were analyzed using one-way ANOVA followed by Tukey's post hoc test (P = 0.05). There was a significant difference between the groups (P < 0.001). Teeth restored with FRC and ceramic overlays had the highest load-bearing capacity. Pulp chamber restoration with either FRC or SDR before ceramic overlay fabrication provided significantly better tooth reinforcement than ceramic overlay alone (P < 0.001). Fracture modes were analyzed to determine the type of fracture as repairable or catastrophic, where FRC + CO and SDR + CO groups had favorable fracture modes that were mostly repairable. When restoring root canal-treated molars with overlays, the pulp chamber should be sealed with either FRC or SDR to ensure the best possible fracture resistance. The clinical relevance of the study is that a new simple restorative protocol is presented to enhance the survival of root canal-treated molars using ceramic overlays.

Authors+Show Affiliations

Department of Conservative Dentistry, Faculty of Dentistry, The British University, Al Shorouk city, Egypt. mohamed.haridy@bue.edu.eg. Department of Conservative Dentistry, Faculty of Dentistry, Cairo University, Cairo, Egypt. mohamed.haridy@bue.edu.eg.Department of Conservative Dentistry, Faculty of Dentistry, The British University, Al Shorouk city, Egypt.Department of Endodontics, Faculty of Dentistry, The British University, Al Shorouk city, Egypt.Department of Endodontics, Faculty of Dentistry, The British University, Al Shorouk city, Egypt. Department of Endodontics, Faculty of Dentistry, Ain Shams University, Cairo, Egypt.Central Interdisciplinary Ambulance in the School of Dentistry, University of Münster, Münster, Germany.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

35064356

Citation

Haridy, Mohamed F., et al. "Fracture Resistance of Root Canal-treated Molars Restored With Ceramic Overlays With/without Different Resin Composite Base Materials: an in Vitro Study." Odontology, vol. 110, no. 3, 2022, pp. 497-507.
Haridy MF, Ahmed HS, Kataia MM, et al. Fracture resistance of root canal-treated molars restored with ceramic overlays with/without different resin composite base materials: an in vitro study. Odontology. 2022;110(3):497-507.
Haridy, M. F., Ahmed, H. S., Kataia, M. M., Saber, S. M., & Schafer, E. (2022). Fracture resistance of root canal-treated molars restored with ceramic overlays with/without different resin composite base materials: an in vitro study. Odontology, 110(3), 497-507. https://doi.org/10.1007/s10266-021-00682-5
Haridy MF, et al. Fracture Resistance of Root Canal-treated Molars Restored With Ceramic Overlays With/without Different Resin Composite Base Materials: an in Vitro Study. Odontology. 2022;110(3):497-507. PubMed PMID: 35064356.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Fracture resistance of root canal-treated molars restored with ceramic overlays with/without different resin composite base materials: an in vitro study. AU - Haridy,Mohamed F, AU - Ahmed,Hend S, AU - Kataia,Mohamed M, AU - Saber,Shehabeldin M, AU - Schafer,Edgar, Y1 - 2022/01/22/ PY - 2021/08/27/received PY - 2021/12/08/accepted PY - 2022/1/23/pubmed PY - 2022/6/9/medline PY - 2022/1/22/entrez KW - Bulk-fill composite KW - Ceramic overlay KW - Endocrowns KW - Fiber-reinforced composite KW - Fracture modes KW - Fracture resistance KW - Overlay KW - SonicFill SP - 497 EP - 507 JF - Odontology JO - Odontology VL - 110 IS - 3 N2 - The objective of the study was to evaluate the effect of different restorative protocols on fracture resistance of root canal-treated molars. 48 mandibular first molars were used and divided into six groups (n = 8); G1 (negative control): teeth kept intact. G2 (positive control): teeth had root canal treatment and standard MOD cavity preparations but kept unrestored. G3: prepared as G2 and directly restored with VitaEnamic ceramic overlays (CO). G4: as G3, but the pulp chamber was restored first with smart dental restorative (SureFil SDR flow = SDR) bulk-fill flowable composite base. G5: as G3, but the pulp chamber was restored first with SonicFill (SF) bulk-fill composite base. G6: as G3, but the pulp chamber was restored first with a fiber-reinforced composite (FRC) base. All samples were subjected to thermocycling between 5 °C and 55 °C in a water bath for a total of 2000 cycles with 10 s dwell time. Then specimens were individually mounted on a computer-controlled testing machine with a load cell of 5 kN, and the maximum load to produce fracture (N) was recorded. Data were analyzed using one-way ANOVA followed by Tukey's post hoc test (P = 0.05). There was a significant difference between the groups (P < 0.001). Teeth restored with FRC and ceramic overlays had the highest load-bearing capacity. Pulp chamber restoration with either FRC or SDR before ceramic overlay fabrication provided significantly better tooth reinforcement than ceramic overlay alone (P < 0.001). Fracture modes were analyzed to determine the type of fracture as repairable or catastrophic, where FRC + CO and SDR + CO groups had favorable fracture modes that were mostly repairable. When restoring root canal-treated molars with overlays, the pulp chamber should be sealed with either FRC or SDR to ensure the best possible fracture resistance. The clinical relevance of the study is that a new simple restorative protocol is presented to enhance the survival of root canal-treated molars using ceramic overlays. SN - 1618-1255 UR - https://www.unboundmedicine.com/medline/citation/35064356/Fracture_resistance_of_root_canal_treated_molars_restored_with_ceramic_overlays_with/without_different_resin_composite_base_materials:_an_in_vitro_study_ DB - PRIME DP - Unbound Medicine ER -