Format

Send to

Choose Destination
Angle Orthod. 2015 Jul;85(4):673-7. doi: 10.2319/012914-80.1. Epub 2014 Sep 24.

Debris and friction of self-ligating and conventional orthodontic brackets after clinical use.

Author information

1
a  Resident, Department of Orthodontics, Brazilian Association of Dentistry, Belém, Pará, Brazil.
2
b  Graduate student, Department of Orthodontics, School of Dentistry, Federal University of Pará, Belém, Pará, Brazil.
3
c  Associate Professor, Department of Orthodontics, School of Dentistry, Federal University of Pará, Belém, Pará, Brazil.

Abstract

OBJECTIVE:

To compare the degree of debris and friction of conventional and self-ligating orthodontic brackets before and after clinical use.

MATERIALS AND METHODS:

Two sets of three conventional and self-ligating brackets were bonded from the first molar to the first premolar in eight individuals, for a total of 16 sets per type of brackets. A passive segment of 0.019 × 0.025-inch stainless steel archwire was inserted into each group of brackets. Frictional force and debris level were evaluated as received and after 8 weeks of intraoral exposure. Two-way analysis of variance and Wilcoxon signed-rank test were applied at P < .05.

RESULTS:

After the intraoral exposure, there was a significant increase of debris accumulation in both systems of brackets (P < .05). However, the self-ligating brackets showed a higher amount of debris compared with the conventional brackets. The frictional force in conventional brackets was significantly higher when compared with self-ligating brackets before clinical use (P < .001). Clinical exposure for 8 weeks provided a significant increase of friction (P < .001) on both systems. In the self-ligating system, the mean of friction increase was 0.21 N (191%), while 0.52 N (47.2%) was observed for the conventional system.

CONCLUSION:

Self-ligating and conventional brackets, when exposed to the intraoral environment, showed a significant increase in frictional force during the sliding mechanics. Debris accumulation was higher for the self-ligating system.

KEYWORDS:

Friction; Orthodontic brackets; Self-ligating brackets

PMID:
25251040
DOI:
10.2319/012914-80.1
[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Allen Press, Inc.
Loading ...
Support Center