LOGIN
 
Share Page:
Back

Volume 8 , Issue 2
March/April 1995

Pages 187-194


Characterization of Treated Porcelain Surfaces Via Dynamic Contact Angle Analysis

Phoenix/Shen


PMID: 7575970

Successful porcelain repair requires conditioning of porcelain surfaces. Conditioning is intended to facilitate wetting by repair materials and improve interfacial bonding. The objective of this investigation was to determine the effects of selected surface treatments upon the wettability of a representative feldspathic procelain. Dynamic contact angle analysis and scanning electron microscopy were used to characterize the effects of such treatments. Standardized porcelain specimens were subjected to the following five treatment regiments: (1) control (no treatment); (2) airborne particle abrasion using 50 um aluminum oxide; (3) etching with ammonium bifluoride gel; (4) etching with acidulated phosphate fluoride gel; and (5) etching with hydrofluoric acid gel. Following treatment, specimens were cleansed and dried. Advancing contact angles were quantified using dynamic contact angle analysis. Mean falues and 95% confidence intervals were (in degrees): control, 63.8+-2.7; ammonium bifluoride, 39.4 +-2.0; airborne particle abrading, 29.1+-2.9; acidulated phosphate flouride, 24.9 +- 1.7; and hyudrofluoric acid 16.5 +- 1.2. Significant differences were found between all treatment groups (P=.05). Subsequent scanning electron microscopy examination of treated surfaces indicated lesser contact angles were associated with surfaces displaying deeper and wider grooves. Apparently, the resultant increase in surface area produces increased wettability. It is inferred that an increase insurface area may correspond to enhanced resin porcelain bonding.


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