The effectivenessand long-term stability of overbite
correction with incisor intrusion mechanics.
Class II division 2 patient usually present with decresed lower face height where lower incisors super erupt giving rise to deep overbite tendency associated with exaggerated curve of Spee6.
Skeletal and dentoalveolar features in patients with deep overbite malocclusion.
This concept especially as applied to deep overbite patients, has been supported by others9 and produces variable results with regards to maintaining a level curve after treatment.4,10 It has been suggested that the deciduous dentition has a curve of Spee ranging from flat to mild, whereas the adult curve of Spee is more pronounced.11 The development of curve of Spee probably results from combination of factors including eruption of teeth, growth of orofacial structures, and development of neuromuscular system.12
Orthodontic correction of overbite often involves leveling the curve of Spee by anterior intrusion, posterior extrusion, or a combination of these actions.
Vertical planes With regards to the vertical relationship, five patients from the study group and three from the control group exhibited a deep bite (overbite < 0 mm).
The effect of dental overbite on eustachian tube dysfunction in Iranian children.
As for the moderate overbite; the subjects were divided as 78.2% and 21.8% for adolescents and adults respectively, while severe overbite was present in 87.5% of adolescents and 12.5% of adults (Table 3).
This observation was in agreement with Helm and Petersen20, who observed remarkable stability of all malocclusion traits by age except for overbite and mandibular crowd-ing which tended to increase in frequency.