title: Class I malocclusion treatment: influence of a missing mandibular incisor on anterior guidance.
abstract: This case report describes the orthodontic treatment of a patient with a deep-overbite Angle Class I malocclusion, agenesis of a mandibular central incisor, and 2 supernumerary teeth, which caused impaction of the mandibular first premolars. The 15-year-old patient also had a convex profile, maxillary dentoalveolar protrusion, and deficiency of space for the correct alignment of teeth. Therefore, treatment consisted of fixed appliance therapy, cervical headgear, extraction of the supernumeraries and the mandibular and maxillary first premolars, and mesiodistal reduction of the maxillary incisors to solve the arch perimeter discrepancy as much as possible with interproximal stripping. This method of treatment significantly improved the patient's facial and dental esthetics and provided a good functional occlusion, despite the absence of a mandibular incisor, which generally impairs achieving adequate incisal guidance.
authors.affiliation: Department of Orthodontics, Bauru Dental School, University of São Paulo, Bauru, Brazil. sergioestelita@yahoo.com.br
authors.forename: Sérgio Estelita C
authors.initials: SE
authors.lastname: Barros
authors.forename: Guilherme
authors.initials: G
authors.lastname: Janson
authors.forename: Fernando César
authors.initials: FC
authors.lastname: Torres
authors.forename: Marcos Roberto
authors.initials: MR
authors.lastname: de Freitas
authors.forename: Renato Rodrigues
authors.initials: RR
authors.lastname: de Almeida
mesh_terms: D000293:Adolescent; D000848:Anodontia / Q000150:complications* / Q000503:physiopathology; D002508:Cephalometry; D003743:Dental Enamel / Q000601:surgery; D003766:Dental Occlusion; D005115:Extraoral Traction Appliances; D005260:Female; D006801:Humans; D007180:Incisor / Q000002:abnormalities* / Q000503:physiopathology; D008311:Malocclusion, Angle Class I / Q000150:complications / Q000628:therapy*; D008334:Mandible; D009971:Orthodontics, Corrective / Q000295:instrumentation / Q000379:methods*; D014081:Tooth Extraction; D014096:Tooth, Supernumerary / Q000150:complications