LOGIN
 
Share Page:
Back

Volume 13 , Issue 4
July/August 2000

Pages 275-281


One-Piece Castings in Fixed Prosthodontics: A Study of Marginal Adaptation Using Computerized SEM Images

Gaetano Calesini, MD, DDS/Giovanni Battista Bruschi, MD, DDS/Agostino Scipioni, MD, DDS/Costanza Micarelli, DDS/Antonello Di Felice, CDT


PMID: 11203642

Purpose: To determine if the typical mechanical resistance of one-piece castings can be maintained with an elevated level of marginal precision, the authors evaluated 10 consecutive castings obtained using their normal laboratory techniques for one-piece castings. Materials and Methods: For the evaluation of the marginal precision of the castings, a new method that uses a scanning electronic microscope (SEM) integrated with a computerized measuring system was developed. This method proved to be precise and reliable. A total of 3,564 measurements at 3003 was made of the vertical marginal openings of 10 castings structured with 3 abutments and 2 pontics (casting length 43 mm, mean weight 10.4 g). Results: The mean of such measurements of the marginal openings was 22 Ám, although if 2 castings that were judged to be clinically unsuitable when produced are excluded, the abovementioned average is 16 Ám. Conclusion: The proposed casting technique can offer one-piece castings of higher quality, with a level of precision that introduces a new reference standard in the marginal accuracy of these castings in fixed prostheses.


Full Text PDF File | Order Article

 

 
Get Adobe Reader
Adobe Acrobat Reader is required to view PDF files. This is a free program available from the Adobe web site.
Follow the download directions on the Adobe web site to get your copy of Adobe Acrobat Reader.

 

© 2017 Quintessence Publishing Co, Inc

IJP Home
Current Issue
Ahead of Print
Archive
Author Guidelines
About
Accepted Manuscripts
Submission Form
Submit
Reprints
Permission
Advertising
Quintessence Home
Terms of Use
Privacy Policy
About Us
Contact Us
Help