Original scientific paper
Possibilities for Treatment of Impacted Teeth by the Application of Permanent Magnets
Cvetko Mišolić
; Steiermärkische Gebietskrankenkasse Josef-Pongratz - Platz 1 8011 Graz
Želimir Muretić
; Stomatološki fakultet Sveučilišta u Zagrebu Gundulićeva 5, Zagreb, Hrvatska
Abstract
Traditional surgical-orthodontic treatment of impacted teeth has certain disadvantages, which has lead to the recent investigations o f this problem. The present investigation was undertaken with the aim o f establishing whether Sm - Co5 magnets, o f a dimension applicable in the oral cavity, are a worthy source of extrusional force; suggesting the optimal position of magnetic segments during the treatment procedure of the impacted tooth; objectifying the direction of tooth movement during the procedure, and concluding the eventual clinical applicability of the investigated procedure. The sample consisted of 4 pairs o f cylindrical magnets, o f different dimensions (4x4, 5x2, 5x4 and 5.85x6 mm) and volume, whose magnetic field was directed parallelly with the longitudinal axis. Changes in intensity o f the magnetic force within the magnetic field were analyzed by dynamometry, within original construction. In the simulated procedure
in vitro the direction o f movement of an impacted tooth was observed on an acrylic model o f the upper jaw with the application of a natural tooth with an attached inner magnet and a conventional orthodontic plate to support the outer magnet.Results indicate that the measured values of forces o f magnets of suitable dimensions, are adequate - for extrusion of the impacted tooth. The intensity o f the force depends on the distance of the magnets and their dimensions. When the gap between the magnets is increased the intensity of the magnetic force drops significantly at the start of shorter distances. Four basic positions for the magnet were established and the direction o f movement of the impacted tooth, within the magnetic field, is predictable in each phase o f the procedure. The results acquired in this study indicate the clinical applicability.
Keywords
magnets; permanent magnets; impacted teeth; magnetic force; extrusion of teeth
Hrčak ID:
97863
URI
Publication date:
15.6.1998.
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