International Journal of Oral Health Dentistry 2021;7(3):216–218 Content available at: https://www.ipinnovative.com/open-access-journals International Journal of Oral Health Dentistry Journal homepage: www.ijohd.org Case Report Early intervention of anterior cross bite malocclusion relating to functional class iii malocclusion Amit Bhardwaj 1 , Kratika Mishra 2 , Vaibhav Misra 3 , Anuj Bhardwaj 4, *, Shivani Bhardwaj 5 1 Dept. of Orthodontics, Modern Dental College and Research Centre, Indore, Madhya Pradesh, India 2 Dept. of Orthodontics, Index Institute of Dental Sciences, Indore, Madhya Pradesh, India 3 Dept. of Orthodontics and Dentofacial Orthopaedics, Divya Jyoti Dental College and Research Centre, Modinagar, Uttar Pradesh, India 4 Dept. of Conservative Dentistry and Endodontics, College of Dental Science and Hospital, Rau, Indore, Madhya Pradesh, India 5 Dept. of Prosthodontics, College of Dental Science and Hospital, Rau, Indore, Madhya Pradesh, India ARTICLE INFO Article history: Received 15-06-2021 Accepted 19-08-2021 Available online 24-09-2021 Keywords: Removable appliance Expansion screw Unilateral crossbite ABSTRACT This case report describes the treatment of a13-year-old boy with anterior dental cross bite, unilateral cross bite and constricted maxillary arch with removable appliance to bring the teeth into a normal position. A removable acrylic appliance with a bite plate incorporating an expansion screw was used to correct the anterior dental cross bite and align the incisors. This is an Open Access (OA) journal, and articles are distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as appropriate credit is given and the new creations are licensed under the identical terms. For reprints contact: reprint@ipinnovative.com 1. Introduction The origin of anterior crossbites could be either dental or skeletal. The etiology of anterior dental crossbites is due to the abnormal axial inclination of the maxillary anterior teeth. Anterior skeletal crossbites are associated with a skeletal problem, such as mandibular prognathism and midface deficiency. 1 The incidence of anterior dental cross bite is 4-5% and is usually as a result of ectopic eruption or palatal malposition of the maxillary incisors 2 resulting from a lingual eruption path. Other etiological factors include trauma to the primary maxillary incisors resulting in lingual displacement of the permanent tooth buds; presence of supernumerary anterior teeth; crowding in the incisor region, an over-retained, necrotic or pulpless deciduous tooth or root; delayed * Corresponding author. E-mail address: dranuj_84@yahoo.co.in (A. Bhardwaj). exfoliation of the primary incisors; and odontomas. 2–5 2. Case Presentation A 13-year-old boy was referred to the orthodontic clinic with the chief complaint of irregularly placed upper front teeth and an unaesthetic appearance of the maxillary central incisors that were behind the lower anterior teeth. No relevant medical and dental history, and the patient did not have a family history of Class-III malocclusion. Pre-treatment extra-oral on smiling (Figure 1) shows unilateral crossbite of 21 with respect to 31, constricted maxillary arch. On intra-oral examination (Figure 2) the permanent maxillary left central incisors were in crossbite, and constricted maxillary arch. The patient was in early- mixed dentition and had a Class-I molar relationship on both sides, with a 2 mm overjet and 80% overbite. The maxillary dental midline was coincident with the facial midline; however, the mandibular dental midline deviated https://doi.org/10.18231/j.ijohd.2021.043 2395-4914/© 2021 Innovative Publication, All rights reserved. 216