ISSN: 7027-2221

Author : R. Al-Tuma, Rawof

Enamel surface damage after Use of self-etched Flowable composite and conventional orthodontic bonding systems "An in vitro study"

Rawof R. Al-Tuma

karbala journal of pharmaceutical sciences, Volume 7, Issue 11, Pages 116-123

Background: This study aims to evaluate enamel surface damage and the site of bond failure after
using of two materials with each has different adhesive techniques. One of them is self-etch (7th
generation bonding system) while the other with three steps conventional technique(5th generation
bonding system).
Materials and methods: eighty premolars, extracted for orthodontic purposes, were divided into 4
groups of 20. The enamel surfaces were examined with 10X magnifying lens. Two types of
bracket (stainless steel and ceramic) was bonded and debonded in each group using ligature wire
cutter. The three steps adhesives was conventional orthodontic bracket adhesive of Oromco
company, the self-etch flowable adhesive was Vertise flow flowable composite of Kerr company
;After debonding, the enamel surfaces were inspected under a stereomicroscope to determine the
predominant site of bond failure and adhesive remnant index. Then stereomicroscope was used to
evaluate enamel surface damage after the removal of residual adhesive.
Results: The reduction in enamel surface damage showed a statistically non-significant with the
use of self-etched flowable adhesive in both ceramic and stainless steel brackets groups. The
amount of the adhesive remained on the tooth surface significantly increase for groups that
bonded with self-etched flowable adhesive in both stainless steel and ceramic brackets. The
predominant failure site in self-etch flowable adhesive was between enamel and bracket for both
types of brackets.
Conclusion: The enamel surface damage that results from debonding of conventional orthodontic
adhesives was non significantly higher than that found with self-etch flowable adhesive for both
metal and ceramic brackets "used in this study"