Orthodontic Treatment in the Rehabilitation of Congenitally Maxillary Lateral Incisors Agenesis with Multiple Maxillary Anterior Diastema Bunga Fatmah and Ida Bagus Narmada Department of Orthodontic, Faculty of Dental Medicine, Universitas Airlangga, Surabaya, Indonesia ABSTRACT The maxillary lateral incisor is the second most common congenitally absent tooth. This is a case of a 25-year-old with maxillary lateral incisors agenesis, multple maxillary anterior diastema. Pre-adjusted technique was used, gingivectomy and frenectomy to release tooth movement. Patent’s profle was straight, interdental relatonship was class I, enlarged space of maxillary lateral incisors, space was replaced by prostheses. The treatment of maxillary lateral incisors agenesis responsible for orthodontc, periodontc and prosthodontc achieved a pleasant aesthetc and functon. Key Words: agenesis, pre adjusted technique, lateral incisors INTRODUCTION Tooth agenesis, one of the most common developmental dental anomalies in humans, is the congenital absence of one or more teeth. 1,2 Te reported incidence of permanent tooth agenesis varies from 1.6 to 9.6%, excluding third molars, which occurs in 20% of the population. 2,3 It usually afects maxillary lateral incisors, mandibular central and lateral incisors with the common missing teeth in Asian population being the mandibular incisors. 4 Maxillary lateral incisors agenesis afects approximately 2% of the population. 5 Te maxillary lateral incisors agenesis has a great aesthetic and functional impact for the anomaly patient, as well as for health professionals, making the treatment plan a great challenge. 6 Maxillary lateral incisors agenesis (MLIA) is the most common congenitally missing permanent tooth condition in the maxillary anterior region (esthetic zone). It has been found that females are more afected than males, 5 and bilateral MLIA are more frequently reported than unilateral cases. 7 Te multiplicity of tooth agenesis theories suggests a multifactorial etiology that involves genetic regulation and environmental factors. 8 Maxillary lateral incisors agenesis whether unilateral or bilateral may afect the self-esteem and social relationships of the afected individual. Maxillary lateral incisors agenesis may cause a variety of esthetic and functional problems; their absence may cause a diastema between the central incisors, spacing between permanent incisor and canine, mesial migration of canines, midline shift in case of a unilateral missing tooth. 5,9 Te options available to the clinician are the possibility of space closure with mesial repositioning of canines, followed Paper presented at the Joint Scientfc Meetng in Special Care Dentstry, July 5, 2019, Amerta Room, 4th Floor, main campus of Universitas Airlangga, Surabaya, Indonesia. Corresponding author: Ida Bagus Narmada Department of Orthdontc Faculty of Dental Medicine Universitas Airlangga Jl. Mayjen. Prof. Dr. Moestopo No. 47 Surabaya 60132 – Indonesia Email: dr_narmada@yahoo.com VOL. 53 NO. 6 2019 ACTA MEDICA PHILIPPINA 539 CASE REPORT