Distal movement of upper permanent molars using midpalatal mini-implant

Dental Press Journal of Orthodontics

Sávio Prado¹  Ana de Lourdes Sá de Lira²  Eduardo Franzotti Sant'Anna³  Mônica Tirre Araújo³  Antonio Carlos de Oliveira Ruellas³ 

[1] Universidade Federal do Pará;Universidade Federal do Piauí;Universidade Federal do Rio de Janeiro;

关键词: Movimentação dentária;    Procedimentos de ancoragem ortodôntica;    Palato duro;   

DOI  :  10.1590/S2176-94512013000200006

来源: DOAJ

【 摘 要 】

OBJECTIVE: To assess whether palatal mini-implants are effective as direct anchorage for distal movement of the upper molars. METHODS: It was used an acrylic model of the upper dental arch. After making a groove in the region corresponding to dental alveolus, acrylic teeth were fixed in groove with #7 wax, with the roots being previously immersed in adhesive wax. The orthodontic appliance was placed according to the Edgewise technique and then a mini-implant (SIN, São Paulo, Brazil) was inserted at the site corresponding to the palatal raphe. A 0.019 x 0.025-in stainless steel archwire was made and attached to the upper arch with elastics. A transpalatal arch bar (0.019 x 0.025in) was mounted and two hooks were soldered to it in order to retain chain elastics (Unitek, Brazil) to be connected to the mini-implant under a force of 1.5 N on each side. The maxillary model was immersed in water 40 times and photographed after each immersion, for observation of dental movements. Analysis of variance (ANOVA) and Tukey's test were employed for analyzing the obtained data. RESULTS: Molars displaced distally 3.1 mm, in average, with distal inclination ranging from 3 to 5 mm. CONCLUSIONS: Molar movements occurred due to distal inclination, with a slight rotation and no extrusive effect.

【 授权许可】

Unknown