Resistance of Resin-Bonded Ceramic Endocrowns of Different Intracoronal Depths

Purpose: This in-vitro study was conducted to assess the fracture resistance of resin-bonded ceramic endocrowns with different designs at varying intracoronal depths. Materials and Methods: Forty-eight (n = 48) extracted mandibular first molar teeth were randomly divided into four groups (n = 12). In the control group, the specimens remained untreated. Whereas the specimens in the test groups A, B, and C were decapitated 2 mm above the cementoenamel junction (CEJ) and endodontically treated. The test groups were prepared with a butt-joint design in a standardised manner with varying intracoronal depths. Groups A, B, and C were prepared to receive lithium disilicate endocrown with intracoronal cores at 0 mm, 2 mm, and 4 mm, respectively. Crowns were fabricated as a non-anatomical design with a thickness of 3 mm. After ceramic bonding procedures, specimens underwent thermocyclic ageing prior to the fracture resistance test. Specimens were loaded at a 15-degree angle using the Universal Testing Machine and the failure modes were observed. One-way analysis of variance (ANOVA) and Chi-square were utilised for data statistical analyses. Results: Significant statistical results in fracture resistance tests were found in all experimental groups. The highest load was found in group B, followed by group C, and lastly group A (P 0.05). Although endocrowns with no extension had the lowest fracture resistance, they showed a favourable cohesive failure with statistically no significant difference from the control group. Conclusion: In bonded ceramic endocrowns, the fracture resistance is not newcessarily proportional to the intracanal depth. The intrcoronal cores of 4 mm did not show the highest fracture resistance, and their mode of failure was catastrophic compared to endocrowns with no intracoronal extensions.

Object Details

• Location: Deutsche Nationalbibliothek Frankfurt am Main
• Extent: Online-Ressource
• Language: Englisch

References and Relationships

• Bibliographic citation: Resistance of Resin-Bonded Ceramic Endocrowns of Different Intracoronal Depths ; volume:23 ; number:1 ; year:2025 ; pages:51-58 ; Oral health & preventive dentistry ; 23, Heft 1 (2025), 51-58

Contributors, Places and Time

• Creator: Alqarni, Hatem ; Qadoumi, Majd ; AlShehri, Nouf ; AlNowaiser, Norah ; Alaqeely, Razan ; AlHelal, Abdulaziz A. ; Alrabiah, Mohammed ; Alshihri, Abdulmonem ; Alsayed, Hussain

Further information

• DOI: 10.3290/j.ohpd.c_1817
• URN: urn:nbn:de:101:1-2501291211184.740327693149
• Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Last update: 15.08.2025, 7:24 AM CEST