MARGINAL ADAPTATION OF CAD / CAM OCCLUSAL VENEERS FABRICATED FROM DIFFERENT MATERIALS WITH TWO DIFFERENT THICKNESSES:(AN IN-VITRO STUDY) | ||||
| Egyptian Dental Journal | ||||
| Volume 71, Issue 1 - Serial Number 4, January 2025, Page 477-486 PDF (829.59 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/edj.2024.315228.3176 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
Shaimaa Salah Abbass   1; rabab mohamed ibrahim 2; Hanaa Sayed Nassar 1
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| 1Department of Fixed Prosthodontics, Faculty of Dentistry, Ahram Canadian University | ||||
| 2Department of Fixed Prosthodontics, Faculty of Dentistry, Cairo University | ||||
| Abstract | ||||
| Abstract Purpose: The purpose of this study was to compare the marginal adaptation of occlusal veneers constructed from lithium disilicate (IPS e-max), Zirconia reinforced lithium silicate (Celtra Duo) and Resin matrix ceramics (Shofu) materials with two restoration thicknesses. Materials and Methods: 42 Human 2nd mandibular molars were fixed into epoxy resin transparent blocks. Teeth preparation for occlusal veneer was done with 0.5 mm chamfer finish line. Samples were randomized equally into 3 groups according to the material: group 1: (IPS e-max CAD), group 2: (Celtra Duo) and group 3: (Shofu Hc). Samples were further subdivided into 2 groups of thickness: subgroup (A) conventional 1.5mm and subroup (B) thin 1mm. Designing was done by Cerec 3D software version 4.5 with omnicam intraoral scanner. CEREC MCXL 4-Axis machine was used for milling of occlusal veneers. Each surface of the occlusal veneer restoration was subjected to stereomicroscope for testing marginal adaptation. Results: The mean marginal gap of tested samples showed the highest marginal gap for thin thickness of IPS E-max CAD group (12.74 ± 3.8μm), and the lowest marginal gap for conventional thickness of Celtra Duo group (7.69 ± 4.24) μm). Comparison between the two tested thicknesses showed non-significant difference as P>0.05. Comparison between the different materials showed significant difference as P<0.05. Conclusion: Celtra Duo group showed the highest marginal adaptation and IPS E-max CAD showed the lowest marginal adaptation. Both conventional and thin occlusal veneer thickness of the three tested materials presented marginal adaptation mean values within the clinical accepted range. | ||||
| Keywords | ||||
| CAD/CAM technology; Ceramic materials. Marginal adaptation; Occlusal veneers | ||||
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