Comparative Evaluation of Rate of Intrusion and Amount of Periapical Root Resorption with Temporary Anchorage Devices and Connecticut Intrusion Arch in Adult PopulationA Prospective Interventional Study

Introduction: Deep bite is a complaint where there is an increase the in the vertical overlap between the upper and lower arch front teeth. Deep bite is a relatively short face with a square gonial angle and flat mandibular plane are related to the skeletal dimensions that influence this condition. An untreated, deep overbite leads to the problems such as: abnormally increased wear and harm to the teeth, periodontal complains issues with occluding and chewing food, headaches and Temporomandibular Disorders (TMD), painful sores or ulcers, loss of tooth structure and tooth itself. There are various treatment modalities which aid in correction of these anomalies. Such as: mini screw implants Temporary Anchorage Devices (TADs) and various intrusion arches.

Need of the Study: Due to the paucity of evidence regarding rate of intrusion and the correlation of root resorption with use of bilateral TADs and Connecticut Intrusion Arch (CIA), with the aid of Cone Beam Computed Tomography (CBCT), the present study will be conducted to provide an insight into the efficacy of both treatment modalities to correct deep bite and identify which of the two modalities provide less damage to the root and surrounding structure.

Materials and Methods: The following prospective interventional study will be conducted in the Department of Orthodontics and Dentofacial Orthopaedics, Sharad Pawar Dental College, Sawangi, Meghe, Wardha, Maharashtra, India. The duration of study will be two years. A sample of 20 patients will be split into two groups to perform the study. Bilateral TADs will be implanted in group A, while CIA will be placed in group B to allow for the intrusion of front teeth. All the patients will be started with initial levelling and alignment using MBT 0.022” bracket prescription. After leveling and alignment miniscrew implants (TADs) will be placed in the labial cortical plates in between the lateral and canine bilaterally in Group A and CIA will be placed in patients allotted to Group B. CBCT records will be collected in the following time intervals: Before applying intrusion mechanics (T0), After one month of applying intrusion mechanics (T1), three months after applying intrusion mechanics; (T2) six months after applying intrusion mechanics (T3). Rate of intrusion and amount of root resorption will be assessed and compared between these time intervals.

Expected Outcome: The rate of intrusion using different intrusion mechanics have been assessed by other studies, however, they have not been correlated with the amount of root resorption caused by these technique. Therefore, the present study intends to evaluate and compare the rate of intrusion and the amount of root resorption of maxillary anterior teeth using TADs and CIA and thereby assessing better modality in correction of deep bite.