A Comparative Study to Evaluate the Amount of Adhesive remnant on the teeth after the removal of orthodontic brackets which have been polymerized with LED curing units. In- vitro Study

Authors

  • Fakhr Abdulrazak Tishreen University
  • Abd alkarim Hassan Tishreen University

Abstract

Aim:  the  purpose  of  this  study  was  to  compare  the adhesive remnant index of  orthodontic  metallic  brackets  photo-activated with High Intensity light emitting diode(LED) and Traditional light  emitting diode on brackets bonding at different exposure times.

Material and Methods: A light-curing adhesive paste

Light Bond ®,Resiliance Orthodontic Products,Inc.USA) )

was used to bond brackets using different curing times.

Sixty human permanent bicuspid extracted for orthodontic purposes were obtained and randomly divided into 3 groups (n=20). The first group was bonded using a conventional light-emitting diode (LED) (1200 mW/cm2) for 20 seconds, which served as a control group. The other two groups were bonded with a high-intensive light-emitting diode LED (3200 mW/cm2) for 6 and 2 seconds ,respectively. After storage in distilled water for 24 h, a universal testing machine was used to apply an occlusal shear force directly to the enamel-bracket interface at a speed of 0.5 mm/minute. The Adhesive Remnant Index (ARI) was assigned at fractured specimens.

Results: Mean results and standard deviations for the groups were: group I (20s) = 19.8 MPa ,group II (6s)= 15.2 MPa ,

 group III (2s) = 12.2 MPa. One-way analysis of variance detected statistically significant differences in bond strength between group I and group II (P=0.029).

And between group I and group III (P=0.001).but no significant difference was observed in the bond strengths between group II and group III (P=0.153).

Chi-square analysis also detected differences in the adhesive remnant scores.

Conclusions: Reducing exposure time significantly decreased mean values of SBS, even with the use of a high-power LED unit.

Reduction in time also affect the amount of adhesive remnant,(less exposure time more adhesive remnant).

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Published

2023-05-18

How to Cite

1.
العبدالرزاق ف, عبد الكريم حسن. A Comparative Study to Evaluate the Amount of Adhesive remnant on the teeth after the removal of orthodontic brackets which have been polymerized with LED curing units. In- vitro Study. Tuj-hlth [Internet]. 2023May18 [cited 2024Nov.24];45(2):369-82. Available from: https://journal.tishreen.edu.sy/index.php/hlthscnc/article/view/14645

Issue

Vol. 45 No. 2 (2023): Tishreen University Journal for Research and Scientific Studies - Health Sciences Series

Section

Master student researches

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