A mechanical alternative with employment of magnetic force for the tooth desimpactation

Sisenando Itabaiana SOBRINHO, Nelcy Della Santina MOHALLEM, Luiz Cláudio MEIRA-BELO, José Domingos ARDISSON, Sebastiana L. B. LANA

Aim: the present work evaluated a new mechanical alternative to guide the eruption to the oclusal plan of a impacted bicuspid tooth using attractive cobalt-samarium magnets. Methods: the treatment was accomplished in a 11 years old Class I young patient, with a impacted right inferior second premolar. The magnetic system consisted of magnets bonded to the vestibular surface of the impacted tooth and a rigid magnetic pole incrusted in a band and loop container. Previously to the installation of the magnetic system, the magnets were characterized through fluorescence analysis, X rays diffraction and magnetization level. The force/distance relationship used was quantified, the magnets were measured and the buccal magnetic geometry established. Results: the time used in the desimpactation was of 40 days and were necessary two magnetic activations to approach the magnets in this interval. The magnetic option in this clinical case was quite effective so much in relation to the time of treatment as in regard to the comfort proportionated to the patient. The magnets generated a continuous and autonomous force field, not being necessary to use metallic threads as orientation guides in the eruption and nor elastic. Conclusion: this therapeutic possibility will frequently be useful in such deeper desimpactation as the canine teeth ectopics, seen in the daily activity.

Keywords: Magnetic force. Orthodontics. Tooth desimpactation.

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