Light transmittance and surface roughness of a feldspathic ceramic CAD-CAM material as a function of different surface treatments

BMC Oral Health

Research Article

Seda Cengiz¹  İbrahim Duran²  Betül Evmek²  İdris Kavut²  Çağrı Ural²  Emir Yuzbasioglu³ 

[1] Department of Prosthodontics, Faculty of Dentistry, Bülent Ecevit University, Zonguldak, Turkey;Department of Prosthodontics, Faculty of Dentistry, Ondokuz Mayıs University, Samsun, Turkey;Department of Prosthodontics, School of Dentistry, Istanbul Medipol University, Ataturk Bulvari, No:27, 34083, Istanbul, Unkapani, Fatih, Turkey;Biomaterials and Translational Dental Research Laboratory, Regenerative and Restorative Medicine Research Center (REMER), Istanbul Medipol University, Istanbul, Turkey;

关键词: CAD-CAM blocks;    Feldspathic ceramic;    Light-transmission;    Laser treatment;   

DOI  :  10.1186/s12903-016-0245-5

 received in 2016-03-30, accepted in 2016-07-02,  发布年份 2016

来源: Springer

【 摘 要 】

BackgroundThe aim of the present study was to determine the effect of different surface treatments on light transmission of aesthetic feldspathic ceramics used in CAD-CAM chairside restorations.MethodsForty eight feldspatic ceramic test specimens were prepared from prefabricated CAD-CAM blocks by using a slow speed diamond saw. Test specimens were prepared and divided into 4 groups (n = 12). In the control group, no surface treatments were applied on the feldspathic ceramic surfaces. In the hydrofluoric acid group, the bonding surfaces of feldspathic ceramics were etched with 9.5 % hydrofluoric acid. In the sandblasting group the feldspathic ceramic surfaces were air-abraded with 30-μm alumium oxide (Al2O3) particles and Er:YAG laser was used to irradiate the ceramic surfaces. The incident light power given by the LED device and the transmitted light power through each ceramic sample was registered using a digital LED radiometer device. Each polymerization light had a light guide with 8-mm-diameter tips. Light transmission of feldspathic ceramic samples was determined by placing it on the radiometer and irradiating the specimen for 10 s at the highest setting for each light polymerization. All specimens were coated with gold using a sputter coater and examined under a field emission scanning electron microscope. Surface roughness measurement each group were evaluated with 3D optical surface and tactile profilometers.ResultsOne-way ANOVA test results revealed that both surface conditioning method significantly affect the light transmittance (F:412.437; p < 0.001) and the surface roughness values (F:16.386; p < 0.001). Al2O3 and Er-YAG laser application reduced the light transmission significantly (p < 0.05).ConclusionsThe laser and Al2O3 applications reduced the light transmission of 1.5 mm thickness feldspathic ceramic material below the value of 400 mW/cm2 which is critical limit for safe polymerization.

【 授权许可】

CC BY   
© The Author(s). 2016