Adaptation of Cantilever Endocrown Fixed Partial Denture: Effect of Design and Material Type

Fatimah M. Abu Alrub, Postgraduate student, Department of Fixed Prosthodontics, Faculty of Dentistry, Mansoura University, EgyptFollow
Nesma M. El-Gohary, Associate professor, Department of Fixed Prosthodontics, Faculty of Dentistry, Mansoura University, Egypt
Walid Al-Zordk, Professor, Department of Fixed Prosthodontics, Faculty of Dentistry, Mansoura University, Egypt

Article Type

Original Article

Section/Category

Restorative Dentistry

Abstract

Objective: The purpose of this in-vitro study was to evaluate the effect of using different material type and different preparation design on marginal and internal adaptation of cantilever endocrown fixed partial denture. Materials and Methods: Fifty-six mandibular first molars were randomly collected and divided into two main groups (n=28) according to preparation design Group B: butt joint and Group C: 1 mm chamfer finish line. Each group will be subdivide into four subgroups (n=7) according to the material type used, sub-group 1: zirconia, sub-group 2: zirconia reinforced lithium silicate (ZLS), sub-group 3: fiber reinforced composite (FRC) and sub-group 4: polyether ketone ketone (PEKK). Marginal and internal adaptation were assessed via triple scan. The specimens were subjected to 10,000 cycles in temperature between 5˚ C and 55˚ C to simulate one year in oral cavity. Also, were subjected to 240,000 repeated load cycles to simulate a wearing period of one year in the oral cavity. The data were statistically analyzed by ANOVA with Tukey post hoc (α=0.05). Results: There was a statistically significant effect of material alone, preparation design alone and their combined effect. Chamfer preparation design achieved better marginal fit than butt joint preparation design, as reflected in reduced mean marginal gaps. PEKK and zirconia showed superior adaptation, ZLS presented larger discrepancies and FRC was acceptable but lowest performance. Conclusion: Preparation design and material type significantly influence endocrown adaptation. Chamfer finish lines design and PEKK demonstrates promising performance for cantilever endocrowns.

Keywords

Endocrown cantilever; ceramic; fiber reinforced composite; polyether ketone ketone; triple scan

How to Cite This Article

Alrub F , El-Gohary N , Al-Zordk W . Adaptation of Cantilever Endocrown Fixed Partial Denture: Effect of Design and Material Type. Mans J Dent. 2025; 12(4):
Available at: https://doi.org/10.61793/2812-5479.1169