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Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie

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10.09.2018 | Original Article

Are morphologic and topographic alterations of the mandibular fossa after fixed functional treatment detectable on tomograms? Visual classification and morphometric analysis

verfasst von: Gero Stefan Michael Kinzinger, Univ.-Prof. Dr. Jörg Alexander Lisson, Dania Booth, Jan Hourfar

Erschienen in: Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie | Ausgabe 6/2018

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Abstract

Aim

The goal was to evaluate if changes in morphology and topography of the mandibular fossa after Functional Mandibular Advancer (FMA) treatment are detectable on tomograms. Furthermore, the suitability of digital tomograms (DT) over magnetic resonance imaging (MRI) for this particular question was investigated.

Materials and methods

In all, 25 patients (14 female, 11 male) with a skeletal class II malocclusion received treatment with a FMA. DTs were available prior to (T1) and after (T2) FMA treatment. A total of 50 temporomandibular joints were investigated. The mandibular fossae were evaluated metrically and visually regarding treatment-induced alterations. A p < 0.05 was set as the level for statistical significance for all tests. Results were compared to the results of a recent MRI study.

Results

Visual inspection of all 50 joints in the DT at T1 and T2 revealed no alterations of the fossa shape in the sagittal plane; 24 patients showed identical morphology of right and left joints. The metrical analysis revealed no significant changes regarding width, depth and ratio thereof between T1 and T2. There also were no bilateral differences. Another 18 different distance measurements between porion, mandibular fossa, articular eminence and pterygoid fossa showed no significant changes. There was no detectable proof of a fossa shift.

Conclusions

No changes in the sagittal plane, mandibular fossa, the articular tubercle, or a possible fossa shift were found in the DT of class II patients after FMA treatment. DT and MRI measurements and the visual inspection revealed identical findings; thus, DT appears to be a valuable research tool for sagittal analysis of mandibular fossa changes.

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Titel: Are morphologic and topographic alterations of the mandibular fossa after fixed functional treatment detectable on tomograms? Visual classification and morphometric analysis
verfasst von: Gero Stefan Michael Kinzinger
Univ.-Prof. Dr. Jörg Alexander Lisson
Dania Booth
Jan Hourfar
Publikationsdatum: 10.09.2018
Verlag: Springer Medizin
Erschienen in: Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie / Ausgabe 6/2018
Print ISSN: 1434-5293
Elektronische ISSN: 1615-6714
DOI: https://doi.org/10.1007/s00056-018-0156-y

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Are morphologic and topographic alterations of the mandibular fossa after fixed functional treatment detectable on tomograms? Visual classification and morphometric analysis

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