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العنوان
Effect Of Coloring Technique And External Surface Treatment On Esthetic Outcome Of Full-Contour Zirconia Restorations\
المؤلف
Foudah, Sara Mahanny Ibrahim Sobieh.
هيئة الاعداد
باحث / Sara Mahanny Ibrahim Sobieh Foudah
مشرف / Tarek Salah Morsi
مشرف / Amr Saleh El-Etreby
مناقش / Amr Saleh El-Etreby
تاريخ النشر
2014.
عدد الصفحات
155p. :
اللغة
الإنجليزية
الدرجة
الدكتوراه
التخصص
Periodontics
تاريخ الإجازة
1/1/2014
مكان الإجازة
جامعة عين شمس - كلية طب الأسنان - بناء جسور وتركيبات
الفهرس
Only 14 pages are availabe for public view

from 155

from 155

Abstract

direction then fired in Programat P300 furnace Ivoclar Vivadent (IV),
Schaan, FL. While for Subgp P specimens were polished with a sequence of
three diamond burs ; coarse, medium and fine (K0262 Dialite ZR intra-oral
adjustment finishing and polishing system. Brasseler (Br) USA) followed by
applying diamond polishing paste (Zi- polish, bredent, GmbH & Co.KG (br))
with application brush (Wheel Brush Rodeo. (br)) which is double loaded with
natural horse hair. Each step was done for 60 seconds with a total of 4 mins. per
sample. Finally for Subgp PG polished with the same sequence of the polishing
kit without use of diamond paste and then the glaze was applied by the same
described manner. Accelerated aging in a steam autoclave (M 11 ultraclave
autoclave. Midmark USA. (MD)) for 8 consecutive cycles in 134°C 2 bar
pressure.
Measurements for color reproduction of shade A2 (Δ E) were done using
(VITA Easyshade Compact (VT)) spectrophotometer while for translucent
parameter TP and opalascent parameter OP a laboratory spectrophotometer with
integrating sphere (Cary 5000 UV- vis-NIR Agilent Technologies (AT) Inc.,
Santa Clara, CA,USA ) was used.
The results of color reproduction with VITA Easyshade Compact (VT)
were: GP I showed significantly lower Δ E than GP II regardless of surface
finish and aging process. Subgp P showed lowest ΔE values followed by Subgp
G with no statistical significance, and the significantly highest ΔE values were
for Subgp PG in all conditions. Aging had no effect on color reproduction.
Results of translucency and opalescence as measured with Cary 5000 UVvis-
NIR (AT) showed that: coloring technique had no effect on translucency nor
opalescence. Aging, regardless coloring technique and surface finishing
procedure, decreased (TP) values led to a less translucent material and increased (OP) values significantly. For surface finish inverse relation between their effect
on TP and on OP values as; while Subgp P showed the highest TP value
regardless of other variables, it showed the lowest OP values. The exact opposite
was with Subgp G where the lowest TP values and highest OP values were
reported. Subgp PG was in between in all tested conditions.