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, Pages 2343-2353 PDF (1022.12 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/edj.2025.373412.3438 | ||
| Authors | ||
| Yara Hossam El-Deen El-kady* 1; Hanaa Sallam2; Hayat ibrahim El-Banna3 | ||
| 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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