Chuchai AnunmanaSirichai KiattavorncharoenManita Woo2024-01-102024-01-10201920192024Thesis (M.Sc. (Implant Dentistry))--Mahidol University, 2019https://repository.li.mahidol.ac.th/handle/20.500.14594/92214Implant Dentistry (Mahidol University 2019)This study aims to evaluate the effect of different ceramic materials and their thicknesses on the implant abutment backgrounds to the final color of restorations. The monolithic and porcelain-veneered zirconia experimental specimens made from three translucent zirconia (Prettau Anterior, Vita YZ ST and Vita YZ HT) were prepared in the disc-shaped A3 shade with two different thicknesses (1 and 1.5 mm) (n=10). Three abutment backgrounds were prepared from the titanium, whiteshaded and yellow-shaded zirconia. The zirconia specimens were placed on different backgrounds and colors (?E) between the experimental and the control specimens measured in the CIELab system. The results showed that the mean ?E values between the two thicknesses were significantly different in every background for all zirconia materials. The ?E values of the zirconia specimens on the yellow zirconia were lower than other abutments in all thicknesses. The mean ?E within the clinically acceptable values (?E<3) was found in some monolithic zirconia specimens on the white-shaded and yellow-shaded abutment while the ?E values were approximately 3 or less in all 1.5-mm-thick porcelain-veneered zirconia groups.viii, 35 leaves ill.application/pdfengผลงานนี้เป็นลิขสิทธิ์ของมหาวิทยาลัยมหิดล ขอสงวนไว้สำหรับเพื่อการศึกษาเท่านั้น ต้องอ้างอิงแหล่งที่มา ห้ามดัดแปลงเนื้อหา และห้ามนำไปใช้เพื่อการค้าDental implantsZirconMaster ThesisMahidol University