[Displacement of the hinge angle point in a Class II malocclusion; 1 case report during treatment with a Bern activator (an interim report)].
In the context of a global examination of the effects of the activator therapy of Herren in class-II malocclusion, the position of the hinge axis points was studied in a group of 12 consecutive cases (9 boys and 3 girls). The hinger axis was recorded immediately before and in the course of the treatment, using a standardised recording method. After 1 mm change in occlusal relationship, the hinge axis points were located about 2 mm caudally of the tattooed zero point. When the change in occlusal relationship step by step had reached 3, 5 and 7 mm, and even after 6 months of retention, the hinge axis points had moved back by about 1 mm in a cranial direction, but remained still about 1 mm caudally of point zero. In a sagittal direction, a facial dislocation of about 1 mm was found no sooner than after a 6-months retention time. A study on reproducibility was used to ensure the statistical proof of these results.
D000202:Activator Appliances; D000293:Adolescent; D002648:Child; D003766:Dental Occlusion; D003768:Dental Occlusion, Centric; D005260:Female; D006801:Humans; D008297:Male; D008310:Malocclusion / Q000473:pathology*; D008312:Malocclusion, Angle Class II / Q000473:pathology* / Q000628:therapy; D009967:Orthodontic Appliances; D009968:Orthodontic Appliances, Removable; D014087:Tooth Movement Techniques
Die Verlagerung der Hingeachsenpunkte bei Klasse-II/1-Fällen im Verlauf der Behandlung mit dem Berner Aktivator (ein vorläufiger Bericht).