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:: Volume 28, Issue 4 (Winter 2011) ::
J Dent Sch GYEAR__, 28(4): 207-213 Back to browse issues page
The evaluation of the effect of two preparation design: shoulder and Heavy chamfer in IPS e.max Press restorations – In vitro
Ezzatollah Jalalian Corresponding Author: Dr. * , Maryam Esmaeili Dr., Maryam Eliasi Dr., Golsa Keshavarzi Dr.
Associate Professor , Dr.E.Jalalian@dentaliau.ir
Abstract:   (5857 Views)

Background and Aim: Marginal integrity in all ceramic restorations is one of the important elements of the success rate. According to the importance of design preparation in the marginal integrity, in this in-vitro study, decided to compare the marginal integrity between 2 different types of the marginal preparation: shoulder and classic chamfer in IPS e.max press restoration.

Methods & Material: This experimental research has been done in vitro with the single blind technique. One standard die with 7mm height, 5mm diameter was prepared by the milling machine. the preparation design consists half shoulder 90 degree & in the other half classic chamfer, with 1mm depth in both of them & 10 degree tapering and then crowns were made of IPS e.max press & after cementation, were ground at the buccolingually direction. Then they were coated by gold &observed under SEM. The data assessed by T-Test.

Results: A difference between 2 types of marginal preparation was significant (p<0.05). Marginal gap in shoulder preparation was 15.45±0.79 & in classic chamfer site was 13.78±0.52.

Conclusion: The marginal fitness in the classic chamfer preparation was better than shoulder preparation in all ceramic restorations.

J Dent Sch 2011 28(4): 207-213

Keywords: Shoulder, Classic chamfer, Marginal integrity, IPS e.max press
Full-Text [PDF 327 kb]   (1209 Downloads)    
Type of Study: Original Article | Subject: Special
Received: 2010/12/20
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Jalalian E, Esmaeili M, Eliasi M, Keshavarzi G. The evaluation of the effect of two preparation design: shoulder and Heavy chamfer in IPS e.max Press restorations – In vitro. J Dent Sch. 2011; 28 (4) :207-213
URL: http://jds.sbmu.ac.ir/article-1-846-en.html

Volume 28, Issue 4 (Winter 2011) Back to browse issues page
مجله دانشکده دندانپزشکی دانشگاه علوم پزشکی شهید بهشتی Shahid Beheshti University Dental Journal
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