Publications by authors named "E Daou"
Comparison of Ceramic Bonding to Cobalt-Chromium, Zirconia and Nickel-Chromium Alloys Fabricated Using of Various Techniques.
J Biomed Mater Res B Appl Biomater
January 2025
The purpose of this study was to evaluate the characteristics of the ceramic bonding to cobalt-chromium (Co-Cr) alloys fabricated by casting, milling, and additive manufacturing, compared with zirconia and nickel-chromium. One hundred specimens (N = 100), prepared with the dimensions of 25 × 3 × 0.5 mm, were assigned to five groups (n = 20): presintered milled Co-Cr (Group M), additively manufactured Co-Cr (Group SLM), cast Co-Cr (Group C), presintered zirconia (Group Zi), and cast Ni-Cr (Group Ni).
View Article and Find Full Text PDFWe aimed to evaluate ceramic-alloy interface and emphasize the alteration of alloy microstructure after ceramic layering. Thirty-two discs made from a ceramic-alloy combination of pre-sintered cobalt-chromium (CoCr), cast CoCr, cast nickel-chromium (NiCr), or pre-sintered zirconia were prepared with eight discs in each group. Four specimens were examined as manufactured and four were ceramic-layered.
View Article and Find Full Text PDFDoes the choice of the measuring technique affect the comparison of fit between zirconia and cobalt-chromium prostheses?
J Indian Prosthodont Soc
April 2024
Article Synopsis
- The study aimed to compare the fit of presintered zirconia and cobalt-chromium dental prostheses using various imaging techniques like microcomputed tomography (μCT), scanning electron microscopy (SEM), and a stereomicroscope (SM).
- Twenty-four dental prostheses were analyzed, with half made of Co-Cr and half of zirconia, to evaluate their fit on metal abutments through three different measuring methods.
- Results indicated that the measurement technique significantly affected the outcomes, with Co-Cr prostheses fitting better than zirconia when assessed through SEM and SM, while μCT provided similar results to SEM but was more precise than SM.
Does the Build Orientation Parameter Affect the Fit of Fixed Partial Dentures Fabricated by Additive Manufacturing?
Int J Prosthodont
February 2024
Purpose: This in vitro study evaluated the adaptation of cobalt-chromium (Co-Cr) fixed dental prostheses (FDPs) fabricated by selective laser melting (SLM) with different build angles.
Materials And Methods: Maxillary right first premolars and first molars from a typodont were prepared with 1-mm chamfer, 2-mm occlusal reduction, and total taper of 8 degrees to receive three-unit FDPs. After framework design, data were sent to a laser machine, and 30 specimens were fabricated from Co-Cr metal powder by SLM.
Statement Of Problem: Selective laser melting has been increasingly used in the fabrication of metal-ceramic prostheses. The longevity of the prostheses depends on the strength of the metal-ceramic bond, which may differ with the framework manufacturing technique.
Purpose: The purpose of this in vitro study was to compare the bond strength of ceramic to cobalt-chromium (Co-Cr) alloys fabricated by different manufacturing methods.