[The influence of continuous magnetic field on periodontal tissues under overdentures].
BACKGROUND
Last remained teeth with reduced alveolar support do not have long-term prognosis, which is the reason for prolonging the life and thus providing a stable support of overdenture. The data from literature point out that static magnetic field has certain possibilities in resolving such problems.


OBJECTIVE
Having in mind the pathogenetic factors which cause the reduction of the alveolar ridge and periodontal problems in our population, as well as osteoblastic and antiinflamatory activity, the aim of this investigation was to assess the effect of static magnetic field on periodontal tissue under the overdenture.


METHODS
The investigation involved 38 partially edentulous patients, of both sexes and similar oral status who were bearers of a lower complete overdenture and upper classic complete denture as antagonist restoration. In the base of the lower overdenture the micromagnets were installed in the region of the remained teeth, which had static concentrated field of 60-80 mT power. The evaluation was done after 3, 6 and 12 months using the method of light densitometry. Periodontologic analysis was performed by standard and modified periodontologic tests.


RESULTS
In patients with overdentures, after exposure to a magnetic field, the density of bone was not significantly changed, but the use of ANOVA disclosed changes in the observed interval. The tendency of increased density of the alveolar part of the observed region was noted. The region of the corresponding tooth of the contralateral side without magnetic influence showed decreased density of this region in the observed intervals. Plaque index and gingival index were improved underthe influence of the magnetic field, while after 6 and 12 months following the magnet insertion statistically significant changes were confirmed. The magnetic devices did not show any influence on the level of the gingival margin and junction epithelium.


CONCLUSIONS
Static magnetic field is to be considered as a noninvasive procedure which is recommended to patients with reduced number of teeth and alveolar support.
Brković-Popović
Snezana
S
Stamenković
Dragoslav
D
Stanisić-Sinobad
Darinka
D
Rakocević
Zoran
Z
Zelić
Obra
O
D016301:Alveolar Bone Loss / Q000628:therapy*; D015519:Bone Density; D003828:Denture, Overlay; D005260:Female; D006801:Humans; D055909:Magnetic Field Therapy; D008297:Male; D010519:Periodontium; D010948:Viral Plaque Assay