Influence of drugs on orthodontic tooth movement

The objective of the review was to outline the mechanisms of action and effects of some commonly used drugs on tissue remodeling and orthodontic tooth movement. International literature from 1960-2010 on this topic was searched from Medline. A thorough knowledge about the drugs is mandatory for the dental professionals dealing with patients under orthodontic treatment

effect of inter-arch elastics in correcting asymmetrical dentition

This case report deals with the treatment of a 21 years old male patient who had grossly shifted midline. His chief complaint was the asymmetric appearance of his teeth. Skeletally he represented Class III tendency. On the right side represented Class III canine and molar relationship, on the left side Class II canine relationship. Maxillary midline was shifted 3mm to the right and mandibular midline was shifted 3mm to the left side. Our treatment goals were to correct the midline problem and to achieve ideal overbite and overjet relationship. The treatment plan was non-extraction fixed straight wire therapy. After leveling, heavy elastics were used to correct the buccal relationship and anterior midline problem. The patient was superb in cooperation and the maxillary and mandibular dentition were shifted reciprocally in opposite direction with the help of the elastics. At the end of the orthodontic treatment the facial aesthetics of the patient had improved and midlines had been corrected. Ideal overbite and overjet relationship was achieved. It was concluded that inter-arch mechanics can be used effectively in cooperative patients. In this case report the success of the treatment greatly depended on patient cooperation. The patient was pleased with the overall facial changes and occlusal function

Expansion of the mandibular arch using a trombone appliance / 대한치과교정학회지

OBJECTIVE: This case report describes orthodontic treatment of contracted mandibular arch using a trombone appliance. METHODS: A 14-year-old girl with Class II division 2 malocclusion, retroclined maxillary incisors, and buccally displaced maxillary canines required dental expansion in 3 spatial directions to correct the contracted maxillary and mandibular arches. In the initial phase of treatment, the maxillary arch was expanded and distalized using a quad-helix appliance and cervical headgear. Following the expansion and leveling of the maxillary arch, a trombone appliance was used to expand the mandibular arch. On correction of the mandibular arch and provision of sufficient space to level the mandibular teeth, fixed orthodontic treatment phase was initiated. RESULTS: A trombone appliance proved effective in correcting the contracted mandibular arch. Because of labiolingual and transversal expansion, the mandibular dental arch perimeter was increased by 7.4 mm; the misalignment of the mandibular teeth was corrected successfully. CONCLUSIONS: A trombone appliance may serve as an appropriate clinical alternative for treating moderate mandibular arch crowding caused by the contraction of the dental arch.