The efficacy of laser glazing on microstructural, topographical and optical properties of all-ceramicveneers /
Sara Salah Hegazy
The efficacy of laser glazing on microstructural, topographical and optical properties of all-ceramicveneers / فاعلية التزجيج بالليزر على الأشكال المجهرى والخصائص السطحية والبصرية لقشرة الخزفيات Sara Salah Hegazy ; Supervised Azza Mohamed Abdelzaher Hashem , Shaymaa Ibrahim Habib - Cairo : Sara Salah Hegazy , 2015 - 80 P. : charts , facsimiles ; 25cm
Thesis (M.Sc.) - Cairo University - Faculty of Oral and Dental Medicine - Department of Dental Materials
This study was designed to set up proper laser parameters including laser type, power intensity and time of application for glazing of a particular glass-ceramic. The effect of laser glazing of the glass-ceramics on structural, morphological and the topographical characteristics; roughness and hardness, and consequently optical properties was investigated, evaluated and compared with the recommended glazing technique. Two commercially available lithium disilicate ceramics; IPS E-max press and IPS E-max CAD, were used and fabricated by two different techniques: conventional lost wax (Injectable heat pressed) and machinable Computer Aided Design / Computer Aided Manufacturing (CAD/CAM) techniques.A total number of 100 samples;50 for each material, (5mm diameter and 2 mm thickness) were fabricated. After discs fabrication, two glazing techniques were adopted to the ceramic samples namely; conventional glazing and laser glazing. Conventional glazing was conducted according to the manufacturer's instructions. Meanwhile, for laser glazing, CO₂ laser device was used where specimens were subjected to 20 watt Power using, 200 J Energy and 10 seconds application time repeated three times with a resting period of 10 seconds between each application. Ceramic samples were then evaluated and characterized using X-Ray Diffraction analysis and scanning electron microscope. Surface roughness evaluation before and after glazing was conducted using white light Profilometry. In addition, microhardness was measured using Vickerss microhardness tester. Finally, color change measurement was done using Spectrophotometer
All-ceramicveneers Dental Ceramics Laser glazing
The efficacy of laser glazing on microstructural, topographical and optical properties of all-ceramicveneers / فاعلية التزجيج بالليزر على الأشكال المجهرى والخصائص السطحية والبصرية لقشرة الخزفيات Sara Salah Hegazy ; Supervised Azza Mohamed Abdelzaher Hashem , Shaymaa Ibrahim Habib - Cairo : Sara Salah Hegazy , 2015 - 80 P. : charts , facsimiles ; 25cm
Thesis (M.Sc.) - Cairo University - Faculty of Oral and Dental Medicine - Department of Dental Materials
This study was designed to set up proper laser parameters including laser type, power intensity and time of application for glazing of a particular glass-ceramic. The effect of laser glazing of the glass-ceramics on structural, morphological and the topographical characteristics; roughness and hardness, and consequently optical properties was investigated, evaluated and compared with the recommended glazing technique. Two commercially available lithium disilicate ceramics; IPS E-max press and IPS E-max CAD, were used and fabricated by two different techniques: conventional lost wax (Injectable heat pressed) and machinable Computer Aided Design / Computer Aided Manufacturing (CAD/CAM) techniques.A total number of 100 samples;50 for each material, (5mm diameter and 2 mm thickness) were fabricated. After discs fabrication, two glazing techniques were adopted to the ceramic samples namely; conventional glazing and laser glazing. Conventional glazing was conducted according to the manufacturer's instructions. Meanwhile, for laser glazing, CO₂ laser device was used where specimens were subjected to 20 watt Power using, 200 J Energy and 10 seconds application time repeated three times with a resting period of 10 seconds between each application. Ceramic samples were then evaluated and characterized using X-Ray Diffraction analysis and scanning electron microscope. Surface roughness evaluation before and after glazing was conducted using white light Profilometry. In addition, microhardness was measured using Vickerss microhardness tester. Finally, color change measurement was done using Spectrophotometer
All-ceramicveneers Dental Ceramics Laser glazing