Evaluation of Root Resorption and Tooth Inclination in Class II Malocclusion Patients Treated with Advansync2 Appliance – A CBCT Study

Abstract

The Advansync2 appliance is known as a tooth-borne fixed functional appliance consisting of bands cemented on permanent first molars in the upper and lower arches, to dissipate orthodontic forces. These fixed functional appliances could cause excessive proclination of the lower incisors, which could lead to inflammatory root resorption. Therefore, the purpose of this study was to evaluate the degree of root resorption and incisor tooth inclination changes in subjects with class II malocclusion who were treated with the Advansync2 appliance. 10 patients (6 males and 4 females ) between the age group of 13-20 years with class II malocclusion treated with Advansyc2 appliance were included. A CBCT of each of these patients was taken before and after the treatment with the Advansync2 appliance and evaluated for the amount of root resorption and tooth inclination in the mandibular incisor tooth region. The measurement of root resorption was made using the axial navigation method. Statistical analysis was done using SPSS software (version 22.0). A paired t-test was used to detect changes in the root length before and after the use of the Advansync2 appliance. Wilcoxon signed-rank test was used to compare the parameters of the angle of inclination as the data was not normally distributed. There was a statistically significant reduction of the mandibular anterior tooth roots by 0.52mm (p =0.01). The angle of inclination for the mandibular incisor region was reduced by 5.73 ° indicative of proclined incisors (p = 0.005).