light transmission through three types of translucent zirconia

نویسندگان

m. abdo tabrizi dept. of restorative dentistry, school of dentistry, shahid beheshti university of medical sciences, tehran, iran

f. babaki dept. of restorative dentistry, school of dentistry, gilan university of medical sciences, gilan, iran.

a. ghassemi dept. of restorative dentistry, school of dentistry, shahid beheshti university of medical sciences, tehran, iran.

a. najafi dept. of restorative dentistry, school of dentistry, shahid beheshti university of medical sciences, tehran, iran.

چکیده

objective: zirconia cores have limited light transmittance and data are scarce on light transmission through zirconia cores with and without the veneering ceramic.   methods: in this in vitro study, disc-shaped specimens (11.5 mm in diameter and 0.4 (0.05) mm in thickness) were fabricated of three types of zirconia namely mamut, heany and zirkonzahn (n=5). a disc-shaped specimen (11.5 mm in diameter and 0.65 (0.05) mm in thickness) of veneering ceramic (cerabien zr, kuraray, noritake, japan) was also fabricated. the intensity of light transmitted through the zirconia specimens with and without the veneering ceramic was recorded using a light curing unit (led, sdi radii plus, australia) and its respective radiometer (led radiometer, sdi, australia). data were analyzed using repeated measures anova and tukey’s hsd test.   results: a significant difference was noted in light transmission among different types of zirconia before and after veneering. after veneering, light transmission decreased in all specimens and the reduction in light transmission in zirkonzahn group was significantly greater than that in heany and mamut groups (p<0.001).   conclusion: veneered zirconia systems have limited translucency and ceramic veneering significantly decreases light transmission through zirconia.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Light Transmission through Three Types of Translucent Zirconia

  Objective: Zirconia cores have limited light transmittance and data are scarce on light transmission through zirconia cores with and without the veneering ceramic.   Methods: In this in vitro study, Disc-shaped specimens (11.5 mm in diameter and 0.4 (0.05) mm in thickness) were fabricated of three types of zirconia namely Mamut, Heany and ZirkonZahn (n=5). A disc-shaped specimen (11.5 mm in d...

متن کامل

Light transmission through a translucent fiber post.

This study is a quantitative assessment of the luminous energy transmitted through different translucent fiber posts. After embedding the posts in black resin, the blocks were submitted to sequential cuts in a precision machine, and depths of 16 mm, 12 mm, 8 mm, and 4 mm were assessed for light transmission with a digital photometer. The quantitative analysis showed significant differences betw...

متن کامل

New High - Translucent Cubic - Phase – Containing Zirconia

Fabricating all-ceramic restorations with minimal or no application of a secondary phase while maintaining esthetics has been a sought-after goal of the dental profession. The objective has been development of a monolithic material with optical properties similar to the natural tooth without the need for layering porcelain. This article examines some of the newer cubic zirconia materials used i...

متن کامل

Less Light Transmitted Through Zirconia Copings Translucency of Zirconia Copings Made With Different

Background: There is increased use of all-ceramic crowns in place of ceramo-metal crowns in restorative practices. The difference in properties of different ceramics will affect the final esthetics of the restoration, and we need to consider this, especially when restoring anterior teeth. This article compares and analyzes translucency levels of different zirconia-based ceramic CAD/CAM systems....

متن کامل

Effects of Aging on Mechanical and Optical Properties of Translucent and Opaque Zirconia

Background and Aim: This study evaluated the effect of hydrothermal aging on opti-cal and mechanical properties of opaque and translucent zirconia. Materials and Methods: For the biaxial flexural strength (BFS) test, 40 sintered opaque and translucent disc-shaped zirconia, and for the assessment of surface rough-ness and optical properties, 20 specimens were fabricated and artificially aged in...

متن کامل

Effect of different semimonolithic designs on fracture resistance and fracture mode of translucent and high-translucent zirconia crowns

Purpose The aim of this study was to describe different designs of semimonolithic crowns made of translucent and high-translucent zirconia materials and to evaluate the effect on fracture resistance and fracture mode. Methods One hundred crowns with different designs were produced and divided into five groups (n=20): monolithic (M), partially veneered monolithic (semimonolithic) with 0.3 mm b...

متن کامل

منابع من

با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید


عنوان ژورنال:
journal of dental school, shahid beheshti university of medical sciences

جلد ۳۳، شماره ۲، صفحات ۱۲۳-۱۳۰

میزبانی شده توسط پلتفرم ابری doprax.com

copyright © 2015-2023