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Full-Text Articles in Dentistry
Effect Of Increased Implant Crown Height On Fracture Strength Of Ips-E.Max Cad Hybrid Abutment Crown: An In-Vitro Study, Mohammad Mehdi Imani-Emadi
Effect Of Increased Implant Crown Height On Fracture Strength Of Ips-E.Max Cad Hybrid Abutment Crown: An In-Vitro Study, Mohammad Mehdi Imani-Emadi
Student Theses, Dissertations and Capstones
Introduction: The use of a secondary titanium insert has a beneficial influence on the stability of ceramic abutments and appears to be clinically useful for premolar and molar single-tooth replacements. Available titanium inserts in the market produced by Sirona, have a single height of 4.6mm with various platform diameters for different implant systems. The aim of this in-vitro study was to determine the fracture strength of IPS-e.max CAD hybrid abutment crowns with various crowns heights by simulating cyclic masticatory loads in vitro. Materials and Methods: Forty conical AstraTech EV dental implants, 4.2 mm in diameter and 9.0 mm in length …
Comparison Of Cutting Efficiency Of Different Rotary Instruments, On Two Different Ceramic Materials Using Electric And Air-Turbine Dental Hand-Pieces, Salam Hetou
Student Theses, Dissertations and Capstones
Objective. This study compared the cutting efficiency of different diamond rotary cutting instruments on twoceramic materials when used with an electric handpiece versus an air-turbine handpiece. The amount of surface roughness exhibited by an electric hand-piece was also evaluated in comparison with an air-turbine hand-piece, when used to cut through ceramic restorative materials in a simulated crown removal procedure. Materials and Methods.One-hundred and sixty ceramic specimens were fabricated from lithium disilicate (IPS e.max Press, Ivoclar Vivadent, Amherst, NY) and zirconium oxide (ZirCAD, Ivoclar Vivadent, Amherst, NY) with standardized dimensions (5mm x 2mm x 20mm). Samples were divided into eight groups …
Effect Of Prophylactic Pastes On Surface Roughness And Gloss Of Esthetic Dental Restorative Materials, Thani Alsharari
Effect Of Prophylactic Pastes On Surface Roughness And Gloss Of Esthetic Dental Restorative Materials, Thani Alsharari
Student Theses, Dissertations and Capstones
Objective: To evaluate the average surface roughness (Ra) and gloss (GU) of four different commonly used ceramics, four resin composites and human enamel after application of four different types of prophylactic pastes. Material and methods: A total of two hundred and forty specimens, composed of four types of ceramics and four types of resin composites were prepared to test the hypothesis. Twenty specimens were assigned to the first two ceramic groups: Lithium disilicate (LiSi2), and Feldspathic ceramic (FP). The third ceramic group, Zirconia (Zi) included one-hundred and twenty specimens divided into two groups of sixty specimens each (IPS e.max ZirCAD …