An experimental method for in vivo analysis of biomechanical asymmetries of the periodontium
| Autor: | Gernot Heine, Michael Cronau, Henning Dathe, Claudia Hansen, Hans Nägerl, Dietmar Kubein-Meesenburg, Dankmar Ihlow |
|---|---|
| Jazyk: | němčina |
| Rok vydání: | 2003 |
| Předmět: |
Periodontium
Rotation Tooth Movement Techniques Orthodontic Brackets media_common.quotation_subject Finite Element Analysis Orthodontics Anterior crowding Asymmetry Biomechanical Phenomena law.invention 03 medical and health sciences 0302 clinical medicine stomatognathic system law Humans Bicuspid Computer Simulation media_common Physics Widely spaced teeth Signal Processing Computer-Assisted 030206 dentistry Finite element method Elasticity stomatognathic diseases Drive shaft Oral Surgery 030217 neurology & neurosurgery Malocclusion Software |
| Zdroj: | Journal of orofacial orthopedics = Fortschritte der Kieferorthopadie : Organ/official journal Deutsche Gesellschaft fur Kieferorthopadie. 64(5) |
| ISSN: | 1434-5293 |
| Popis: | For analysis of the initial tooth movement in vivo, an optical measuring apparatus with a resolution of 0.001 degree for rotation or 0.5 micron for translation respectively has been developed. Its design is described in detail. Because of its high sensitivity it is experimentally feasible to investigate the biomechanical properties of the periodontium under force application and to determine if it makes any difference whether a tooth is rotated mesially or distally out of its neutral position. For that purpose moments with defined time responses are buccally applied to premolars by means of a cardan shaft and the corresponding rotational angle-time characteristics are recorded. As expected, first measurements show sign symmetry for widely spaced teeth. In the case of pronounced anterior crowding, however, asymmetry seems to occur in such a manner that the force system has to overcome a threshold in order to rotate the tooth distally. Additionally, the periodontium may be subject to a sign-dependent rigidity. In all cases, the movement is limited to some degree. |
| Databáze: | OpenAIRE |
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