In vitro evaluation of resistance to sliding in self-ligating and conventional bracket systems during dental alignment.
10.4041/kjod.2012.42.4.218
- Author:
Giancarlo CORDASCO
1
;
Antonino LO GIUDICE
;
Angela MILITI
;
Riccardo NUCERA
;
Giuseppe TRIOLO
;
Giovanni MATARESE
Author Information
1. Department of Orthodontics, School of Dentistry, University of Messina, Messina, Italy. giovannimatarese@virgilio.it
- Publication Type:In Vitro ; Original Article
- Keywords:
Bracket;
Wire
- MeSH:
Elastomers;
Friction;
Ligation;
Models, Theoretical;
Polymers
- From:The Korean Journal of Orthodontics
2012;42(4):218-224
- CountryRepublic of Korea
- Language:English
-
Abstract:
OBJECTIVE: To investigate the resistance to sliding (RS) in self-ligating and conventional ligation bracket systems at 5 different second-order bracket angulations by using low-stiffness alignment wires in a 3-bracket experimental model and to verify the performance of the main RS components in both systems when these wires are used. METHODS: Interactive self-ligating brackets with closed and open slides were used for the self-ligating (SL) and conventional ligation (CL) groups, respectively; elastomeric ligatures (1 mm inner diameter) were used in the latter system. The alignment wire used was 0.014 inch heat-activated NiTi (austenitic finish temperature set at 36degrees C by the manufacturer). A custom-made testing machine was used to measure frictional resistance. Tests were repeated 5 times at every angulation simulated. All data were analyzed statistically. RESULTS: The RS increased significantly with increasing angulation in both SL and CL groups (p < 0.0001). However, the RS values were significantly higher at every angulation (p < 0.0001) in the CL group. CONCLUSIONS: Despite the relevance of the binding phenomenon, ligation forces predominantly affect the RS when low-stiffness alignment wires are used.
