Entstehung und orthodontische Behandlung der Klasse-III-Malokklusion

Zusammenfassung

Die Autoren befassen sich mit der Entstehung der Klasse III und des offenen Bisses aus der Sicht der Evolution. Dabei wird die vertikale Entwicklung des Gebisses, mit der Tendenz zur Hyperdivergenz in den Vordergrund gestellt und besonders auf den posterioren Abschnitt der Okklusion verwiesen. Letzterer beeinflusst die Lage der Okklusionsebene wie auch deren Neigung. Ist die Okklusionsebene steil (nach posterior superior geneigt), so entsteht die Klasse II. Bei flacher Okklusionsebene entwickelt sich die Klasse III. Je nach Tonus der Muskulatur kann auch ein offener Biss hinzukommen.

Abstract

The development of a class III open bite is described from an evolutionary point of view. The authors focus on the vertical development of the dentition with its hyperdivergent tendencies. Position and inclination of the occlusal plane are affected primarily by the posterior occlusal vertical dimension. On the basis of a heavily inclined occlusal plane (inclined postero-superiorly) a class II malocclusion will develop, whereas a class III malocclusion will result from a more even occlusal plane. Dependent on growth and strength of the associated muscles an open bite may develop as well.

Schlüsselwörter

Klasse-III-Entstehung - Multiloop-Edgewise-Archwire - posteriore Diskrepanz - posteriores Crowding

Key words

Development of a class III malocclusion - multiloop edgwise archwire - posterior discrepancy - posterior crowding

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