[The application of the asymmetry index in assessment of mandible size in difficult diagnostic case].
BACKGROUND
Recognised and unrecognised bone diseases including maxilla and/or mandible may have influance on formation of malocclusions. In first stages of diseases the patients are directed or report for orthodontic treatment which starting need additional examinations mainly pantomographic views. In spite doing necessary additional examinations sometimes we can't recognise disorder like patient presented in our study. Then we can observate and if changes will begin disturbing the function--surgical intervention.


OBJECTIVE
Establishment of orthodontic treatment plan and explanation if during three years the dimension of asymmetry resulting from wrong growth right and left part of mandible and the estimation the rate of changes happening in this time.


METHODS
In study we used the own asymmetry index to estimate the patient's pantomographic views who reported for orthodontic treatment because of occlusion disorders, facial asymmetry and discomfort of mastication and speech. The telerentgenographic lateral views in right and posterior-anterior (PA) projection were also done. We measured and estimated the own asymmetry index on pantomographic views.


RESULTS
The radiographs reveal the asymmetry of left part of mandible. The comparative analysis of pantomographic views enables the estimation of changes happening in time and the telerentgenographic lateral views, PA and computer tomography (CT) confirm changes which increase the asymmetry.


CONCLUSIONS
The asymmetry index is the instrument which enable the estimation of growth changes in mandible with unsteady aetiology and histopathological unrecognised, allow determine the growth rate and facilitate the permanent control the dimension of mandible asymmetry.
Syryńska
Maria
M
Katedra i Zakład Ortodoncji Pomorskiej Akademii Medycznej w Szczecinie al. Powstańców Wlkp. 72, 70-111 Szczecin.
Szyszka
Liliana
L
Post
Marcin
M
D000328:Adult; D002508:Cephalometry / Q000295:instrumentation / Q000379:methods; D005146:Facial Asymmetry / Q000000981:diagnostic imaging* / Q000209:etiology*; D005260:Female; D006801:Humans; D008310:Malocclusion / Q000150:complications* / Q000000981:diagnostic imaging*; D008334:Mandible / Q000002:abnormalities* / Q000000981:diagnostic imaging* / Q000254:growth & development; D011862:Radiography, Panoramic; D014057:Tomography, X-Ray Computed