Pengaruh Penambahan Bubuk Nanokitosan Pada Bahan Profilaksis Terhadap Kekuatan Geser Perlekatan Braket Ortodonti

Abstract

Failure of bracket attachment to enamel surface is a common problem in fixed orthodontic treatment. Previous research has stated that the incidence of this failure is multifactorial, but it is largely associated with incorrect bonding procedure. This study was aimed to investigate the effect of different concentrations of nanochitosan powder added to prophylaxis paste on the shear bond strength of stainless steel bracket attachments. The study included three groups with a control group without nanochitosan powder and two experimental groups where 1% and 3% nanochitosan were added to prophylaxis paste. Twenty-seven extracted mandibular first/second premolar (n=9) were bonded to stainless steel brackets following a standardized procedure. The samples were immersed in artificial saliva and stored in an incubator at 37oC for 7 days. Shear bond strength was assessed by using Universal Testing Machine. Data were analyzed using one-way ANOVA test. Results: The shear bond strength mean values in control group is 5,04±0,22 MPa, 1% nanochitosan is 6,51±0,21 MPa, and 3% nanochitosan is 7,88±0,41 MPa. Stastistical analysis showed a significant difference among the groups (p<0,05). Nanochitosan powder added to prophylaxis paste significantly enhances the shear bond strength of stainless steel bracket attachments.