Home Subscription Services
 
   

 
The Journal of Adhesive Dentistry
JAD Home Page
About the Editor
Editorial Board
Submit
Author Guidelines
Submission Form
Reprints / Articles
Permissions
Advertising
Advertising
MEDLINE Search
 
 
 
 
 
FacebookTwitterYouTube
Quintessence Publishing: Journals: JAD

 

The Journal of Adhesive Dentistry

Edited by Jean-François Roulet

ISSN (print) 1461-5185 • ISSN (online) 1757-9988

Publication:

May/June 2012
Volume 14 , Issue 3



Pages: 207 - 213
PMID: 22282751
DOI: 10.3290/j.jad.a22710
Back
Share Abstract:

Ultramorphological Evaluation of the Dentin Acid-Base Resistant Zone of Two-step Self-etching Systems After Long-term Storage in Water

Ichikawa, Chiaki / Nikaido, Toru / Inoue, Go / Sadr, Alireza / Tagami, Junji

Purpose: To evaluate the morphological changes in the acid-base resistant zone (ABRZ) at the resin/dentin interface after long-term storage in water. Materials and Methods: Two-step self-etching adhesive systems, Clearfil SE Bond (SE) and Clearfil Protect Bond (PB) (Kuraray Medical) were used. Human dentin disk sandwiches with resin composite were prepared, sectioned, and embedded in epoxy resin. The specimens were stored in water for 1 day, 1, 3 or 6 months, and then subjected to demineralizing solution and 5% NaOCl. The specimens were finally sectioned again, polished, argon-ion etched, and observed with SEM. Results: The outer lesion (OL) thickness at 1 day ranged from 10 to 15 Ám but increased to approximately 30 Ám after 6 months, suggesting gradual loss of dentin stored in water. A lower electron density was noted in the adhesives at the locations that were exposed to water. The ABRZs were observed clearly in all groups; the thickness of the ABRZ at the mid-point of the OL gradually decreased with time for SE. For PB, the thickness was stable up to 1 month, but decreased after 3 months. The bottom of the ABRZ in SE formed a right angle with dentin; in contrast, in PB, it sloped down toward dentin with a broadening bottom. Conclusions: Water storage resulted in changes both in the dentin substrate and the adhesive layer. An ABRZ was observed beneath the hybrid layer after long-term storage in water in both SE and PB. The ABRZ was thicker and relatively more stable in PB, probably due to fluoride release. Keywords: fluoride, acid-base resistant zone, recurrent caries, hybrid layer, self-etching adhesive system

Full Text PDF File | Order Article

 

 
  © 2014 Quintessence Publishing Co Inc
 

Home | Subscription Services | Books | Journals | Multimedia | Events | Blog
Terms of Use | Privacy Policy | About Us | Contact Us | Advertising | Help | Sitemap | Catalog