Main Instructor Yi-Hao Lee
Department / Institution Orthodontic Department, Kaohsiung Chang Gung Memorial Hospital, Kaosiung, Taiwan
Classification Case report
Orthodontic treatment alone or a combined orthodontic and surgical approach are both alternative treatments for the same Class III malocclusion. Rather than malocclusion, profile is always the principal concern by the patient. To achieve the coordination, comprehensive evaluation must be done.
A 14-year-old female patient processed Class III malocclusion on mild skeletal Class III base, undergoing falling accident last year. She suffered from traumatic impact over her lower jaw, causing her lower right central incisor root fracture. After one year follow-up of traumatic sequelae, tooth vitality and temporomandibular joint was stable. The perception by her and her mom of the relatively proclined lower incisor and anterior cross bite are then the main concern. This case report presented full mouth fixed appliance, facilitated by extraction of lower right central incisor, to correct her anterior cross bite and maintain the acceptable profile. Lower dental midline was set up between lower left central incisor and right lateral incisor. Lower right canine substitution was carried out. After 48 months of total treatment duration, anterior cross bite correction and acceptable buccal interdigitation were achieved.
「Discussion and Summary」
There are some established cephalometric yardsticks for “surgery or not” decision making to be taken in a more objective. In addition to skeletal and dental aspect, soft tissue landmarks also served as reference points.
An Adolescent Female Patient with Class III Malocclusion Treated by Lower Incisor Extraction and Lower Canine Substitution