Effect of Storage Media on the Marginal Adaptation and Elemental Analysis of PEEK and TESSERA Vonlays

Document Type : Original Article

Authors

1 MSC Student, Fixed Prosthodontics, Minia University, Minia and Nahda University, Benisweif

2 Professor, Fixed Prosthodontics, Faculty of Dentistry, Cairo University, Dean of the Faculty of Dentistry, King Salman International University.

3 Assistant Professor, Lecturer of Fixed Prosthodontics, Faculty of Dentistry, Minia University

Abstract

Abstract
Aim: Evaluation of the effect of storage media on the marginal adaptation and elemental analysis of PEEK and TESSERA vonlays.
Materials and Methods: 24 vonlays were constructed. Samples were divided into two groups according to the material of construction (n=12). Group A was fabricated of CEREC Tessera™ blocks and Group B was constructed of breCAM.BioHPP bredent milling disk. Each group was subdivided into two subgroups (n=6) according to storage media they were subjected to: Subgroup (P1) was immersed in acidic media and Subgroup (P2) was immersed in artificial saliva. The samples were subjected to thermal aging. Marginal adaptation was measured after cementation using a stereomicroscope. Samples were analyzed using an environmental EDX. Testing procedures were performed before and after immersion in storage media.
Results: The statistical analysis for PEEK, TESSERA revealed no significant changes in marginal gap in artificial saliva for PEEK (p=0.506) for TESSERA (p=0.489), but a significant change was observed in acidic media for PEEK (p=0.012). for TEESERA (p=0.018) The marginal adaptation values and ranges differ between TESSRA and PEEK, suggesting material-specific responses. PEEK consistently demonstrated higher marginal adaptation values compared to TESSRA, both before and after immersion. PEEK and TEESERA elemental analysis results showed substantial elemental composition modifications in multiple elements in acidic media.
Conclusion: This study concluded that PEEK, TESSERA showed statistically significant difference, indicating substantial variations in marginal adaptation and elemental analysis between the two materials across both artificial saliva and acidic media.

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Egyptian Dental Journal
Volume 71, Issue 2 - Serial Number 4
Fixed Prosthodontics, Removable Prosthodontics and Dental Materials
April 2025
Pages 1577-1591

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