assessment of marginal gap and fracture resistance of emax and tessera anterior endocrown (an invitro study )

Document Type : Original Article

Authors

1 Demonstrator of fixed Prosthodontics, Faculty of Dentistry, Deraya University

2 Professor of Fixed Prosthodontics, Faculty of Dentistry, Cairo University.

3 Lecturer of Fixed Prosthodontics, Faculty of Dentistry, Minya University.

Abstract

Aim: The purpose of this study is to assess the efficiency of anterior endocrowns constructed of Tessera and Emax CAD lithium disilicate for restorative dental applications through comparison of their marginal gaps and fracture resistance.
Material and Method: Twenty-four lately extracted upper central incisors of humans They were selected from the outpatient clinic of the surgical department at Minya University's Faculty of Dentistry. The material used to manufacture the endocrowns the teeth were placed haphazardly into two equal groups. (n = 12). Within each group, two equal groups were created for separate tests: Tessera and Emax CAD. The teeth were ready for an endocrown restoration, and CAD/CAM technology was used to create the endocrowns. Using a stereomicroscope, marginal gaps were assessed at different stages both before and after cementation. In order to assess fracture resistance, the specimens were compressed until they fractured. To assess the fracture resistance and marginal gaps between the two groups, statistical analysis was done.
Results: Both before and after cementation, the Tessera and Emax CAD groups' total marginal gaps did not differ significantly, according to the data. However, A considerable difference in fracture resistance was found., whereas Emax CAD exhibited more resistance in contrast to Tessera. The improved mechanical characteristics, chemical makeup, and microstructure of Emax CAD are responsible for its increased resistance to fracture.
Keywords: CAD/CAM technology, Emax CAD, endocrowns, feldspathic ceramics, fracture resistance, lithium disilicate, marginal gaps, restorative dental materials, Tessera.

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Egyptian Dental Journal
Volume 70, Issue 4 - Serial Number 4
Fixed Prosthodontics, Removable Prosthodontics and Dental Materials
October 2024
Pages 3569-3580

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