ABSTRACT
Transposition of the maxillary canine and the lateral incisor is a complex dental anomaly to treat. The difficulty increases if the treatment aims to correct the transposition. These case reports describe 2 patients with transposition of the maxillary lateral incisor and canine. The first case involves bilateral incomplete transpositions, and the second is a complete transposition. The radiographic appearance of the canine was similar in the 2 patients. However, the treatments were distinct because of the 3-dimensional positions of the teeth. The first case involved palatally placed lateral incisor roots. To prevent resorption of the lateral incisors, the canines were moved into position buccally. In the second case, the lateral incisor root had a buccal position, and the canine crown was tractioned palatally. The position of the lateral incisor root was critical when electing the correct treatment and mechanics for each patient.
Subject(s)
Cuspid/abnormalities , Incisor/abnormalities , Oral Surgical Procedures/methods , Orthodontics, Corrective/methods , Tooth Root/abnormalities , Adolescent , Child , Cuspid/diagnostic imaging , Cuspid/surgery , Female , Humans , Incisor/diagnostic imaging , Incisor/surgery , Male , Malocclusion, Angle Class I/diagnostic imaging , Malocclusion, Angle Class I/surgery , Malocclusion, Angle Class I/therapy , Maxilla , Radiography, Panoramic , Tooth Root/surgeryABSTRACT
OBJECTIVE: To investigate the use of bonded molar tubes (BMTs) by specialist orthodontists. DESIGN: Prospective postal questionnaire. SETTING: Ireland. PARTICIPANTS: Registered members of the Orthodontic Society of Ireland. METHODS: A questionnaire was posted to registered members of the Orthodontic Society of Ireland. It investigated demographics, pattern of use, reasons for use and techniques for placement of BMTs. RESULTS: A 74% response rate was obtained. In more than 80% of cases, BMTs were used on first and second permanent molars by 52% and 33% of orthodontists respectively. BMT usage was adopted by 97% of respondents in the previous decade. Direct bonding was used by all for BMT placement. Etch times for molars, compared to other teeth, increased from 15 to 30 seconds by 51% of orthodontists. Of the respondents, 97% used light-cured adhesives and 17% used self-etching primers. Molar tube holders were preferred by 54% for placement. Only with a history of epilepsy, were bands preferred to BMTs. BMTs were regarded as more cost-effective than molar bands by 66% of responding clinicians. CONCLUSIONS: Specialist orthodontists preferred BMTs to bands on first permenent molars. Direct bonding was favoured using a 30-second etch, a light-cured primer and adhesive with specialized molar tube holders. BMTs were perceived to be more cost-effective than molar bands.
