Effects of ultrasonic instrumentation with different scaler-tip angulations on the shear bond strength and bond failure mode of metallic orthodontic brackets.
10.4041/kjod.2014.44.1.44
- Author:
Giulio ALESSANDRI BONETTI
1
;
Serena INCERTI PARENTI
;
Daniela Rit IPPOLITO
;
Maria Rosari GATTO
;
Checchi LUIGI
Author Information
1. Department of Orthodontics, University of Bologna, Bologna, Italy. giulio.alessandri@unibo.it
- Publication Type:Original Article
- Keywords:
Bracket;
Bonding;
Oral hygiene;
Ultrasonics
- MeSH:
Adhesives;
Bicuspid;
Humans;
Oral Hygiene;
Orthodontic Brackets*;
Tooth;
Ultrasonics*
- From:The Korean Journal of Orthodontics
2014;44(1):44-49
- CountryRepublic of Korea
- Language:English
-
Abstract:
OBJECTIVE: To evaluate the effects of ultrasonic instrumentation with different scaler-tip angulations on the shear bond strength (SBS) and bond failure mode of metallic orthodontic brackets. METHODS: Adhesive pre-coated metallic brackets were bonded to 72 extracted human premolars embedded in autopolymerizing acrylic resin. The teeth were randomly divided into 3 groups (n = 24 each) to undergo no treatment (control group) or ultrasonic instrumentation with a scaler-tip angulation of 45degrees (45degrees-angulation group) or 0degrees (0degrees-angulation group). SBS was tested in a universal testing machine, and adhesive remnant index (ARI) scores were recorded. The Kruskal-Wallis test and Mann-Whitney U-test were used for statistical analysis. RESULTS: The control group had a significantly higher mean SBS value than the treated groups, which showed no significant differences in their mean SBS values. The ARI scores were not significantly different among the groups. CONCLUSIONS: Ultrasonic instrumentation around the bracket base reduces the SBS of metallic orthodontic brackets, emphasizing the need for caution during professional oral hygiene procedures in orthodontic patients. The scaler-tip angulation does not influence the SBS reduction and bond failure mode of such brackets.
