Year : 2022

Volume : Volume 13

Issue : Issue 5

Address for correspondence :
: Mohammad Shahid Masroor
mmsid.824@gmail.com

Abstract

Background: Deep bite treatment can be done by the intrusion of incisor teeth, extrusion of posterior teeth or combination of both, up righting of posteriors or flaring of anterior teeth3.Intrusion of incisors is a preferred method to treat deep bite in many patients because it is a stable treatment and it doesn’t affect the vertical dimension of face. Also, situations including elongated incisors with gummy smile could be better much better treated by incisor intrusion. Treatment of deep bite by intrusion consists of different techniques like K-SIR, j-headgear, RCS, Ricketts utility arch, Burstone arch, Connecticut intrusion arch, vertical loops, implants and three-piece arch2. Materials and Methods: A total of 30 patients who were undergone orthodontic treatment were randomly selected for the study in 3 groups of 10 each. The pre and post CBCT of lower incisor intrusion of the patient was taken to measure the root resorption of different methods. Results: Result were tabulated and statistically formulated as per standard protocol. Result will be tabulated and statically analyzed. The mean value and standard deviation (SD) will be calculated for every variable will be measured in 3D models. Paired t-test will be performed to compare the values in the T1 and T2 stages. One-way analysis of variance (ANOVA) with Duncan’s multiple comparison test will be performed to assess the differences in the amount (T1-T2, ΔT) and ratio (ΔT/T1) of changes in the root length. In multiple comparisons, the mandibular anterior teeth are allocated into group 1 (mandibular central incisors) and group 2 (mandibular lateral incisors). Conclusion: The present study indicates that when the same intrusion force was applied with the 4 maxillary anterior teeth being intruded as a segment either with a base-arch or miniscrews, the degree of labial tilting and intrusion of the anterior teeth increased in both treatment groups, and to a greater extent in the miniscrew group. The degree of labial alveolar bone thickness and bone height decrease were also greater in the miniscrew group. The degree of change in labial inclination and intrusion should be taken into account during upper incisor intrusion, as these factors may increase the risk of alveolar bone loss.

Keywords: Deep bite, Intrusion, Mini screw, Utility arch, RCS arch, CBCT, Lower incisor intrusion