MARGINAL ADAPTATION AND INTERNAL FIT OF ADVANCED LITHIUM DISILICATE (TESSERA) VERSUS LITHIUM DISILICATE (IPS-EMAX CAD) IMPLANT-SUPPORTED HYBRID ABUTMENT CROWNS (AN INVITRO STUDY)
El-kady, Y., Sallam, H., El-Banna, H. (2025). MARGINAL ADAPTATION AND INTERNAL FIT OF ADVANCED LITHIUM DISILICATE (TESSERA) VERSUS LITHIUM DISILICATE (IPS-EMAX CAD) IMPLANT-SUPPORTED HYBRID ABUTMENT CROWNS (AN INVITRO STUDY). EKB Journal Management System, 71(3), 2343-2353. doi: 10.21608/edj.2025.373412.3438
Yara Hossam El-Deen El-kady; Hanaa Sallam; Hayat ibrahim El-Banna. "MARGINAL ADAPTATION AND INTERNAL FIT OF ADVANCED LITHIUM DISILICATE (TESSERA) VERSUS LITHIUM DISILICATE (IPS-EMAX CAD) IMPLANT-SUPPORTED HYBRID ABUTMENT CROWNS (AN INVITRO STUDY)". EKB Journal Management System, 71, 3, 2025, 2343-2353. doi: 10.21608/edj.2025.373412.3438
El-kady, Y., Sallam, H., El-Banna, H. (2025). 'MARGINAL ADAPTATION AND INTERNAL FIT OF ADVANCED LITHIUM DISILICATE (TESSERA) VERSUS LITHIUM DISILICATE (IPS-EMAX CAD) IMPLANT-SUPPORTED HYBRID ABUTMENT CROWNS (AN INVITRO STUDY)', EKB Journal Management System, 71(3), pp. 2343-2353. doi: 10.21608/edj.2025.373412.3438
El-kady, Y., Sallam, H., El-Banna, H. MARGINAL ADAPTATION AND INTERNAL FIT OF ADVANCED LITHIUM DISILICATE (TESSERA) VERSUS LITHIUM DISILICATE (IPS-EMAX CAD) IMPLANT-SUPPORTED HYBRID ABUTMENT CROWNS (AN INVITRO STUDY). EKB Journal Management System, 2025; 71(3): 2343-2353. doi: 10.21608/edj.2025.373412.3438

MARGINAL ADAPTATION AND INTERNAL FIT OF ADVANCED LITHIUM DISILICATE (TESSERA) VERSUS LITHIUM DISILICATE (IPS-EMAX CAD) IMPLANT-SUPPORTED HYBRID ABUTMENT CROWNS (AN INVITRO STUDY)

Egyptian Dental Journal
Volume 71, Issue 3 - Serial Number 4, July 2025, Page 2343-2353  XML PDF (1022.12 K)
Document Type: Original Article
DOI: 10.21608/edj.2025.373412.3438
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Authors
Yara Hossam El-Deen El-kady email orcid 1; Hanaa Sallamorcid 2; Hayat ibrahim El-Bannaorcid 3
1Master’s Candidate, Fixed Prosthodontics Department, Faculty of Dentistry, Cairo University.
2Professor of Fixed Prosthodontics, Faculty of Dentistry, Cairo University
3Lecturer of Fixed Prosthodontics, Faculty of Dentistry, Cairo University
Abstract
Aim: This study aimed to assess the marginal gap and internal fit of implant-supported hybrid abutment crowns (HACs) fabricated from advanced lithium disilicate (CEREC Tessera) and lithium disilicate (IPS e.max CAD).
Materials and Methods: A total of twenty-four HACs were fabricated using a digital workflow from CEREC Tessera and IPS e.max CAD (n=12 per group). Marginal adaptation was evaluated using a stereomicroscope, while internal fit was assessed using the replica technique. The collected data (mean and standard deviation) were statistically analyzed.
Results: A statistically significant difference was observed between the two groups in terms of marginal adaptation (P=0.001), with CEREC Tessera exhibiting a lower marginal gap. However, no statistically significant difference was found between the two tested groups concerning internal fit (P=0.056).
Conclusion: Both CEREC Tessera and IPS e.max CAD hybrid abutment crowns demonstrated clinically acceptable marginal adaptation and internal fit within the established clinical values. These findings support their compatibility for implant-supported restorations.
Keywords
CAD/CAM; Ti-base; Stereomicroscope; Replica technique
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