9. Extraorale Verankerung

Williams, Michelle D.; Cook,; Isaacson,; Thom,

doi:10.1055/b-0034-5283

Festsitzende Kieferorthopädische Apparaturen 2000

DOI: 10.1055/b-0034-5283

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9. Extraorale Verankerung

Michelle D. Williams¹,

Cook Cook²,

Isaacson Isaacson³

et al.

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2007

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Effects of Cervical Headgear on Overbite against the Background of Existing Growth Patterns

Godt¹,

Kalwitzki²,

Göz

2007

The Angle Orthodontist

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Objective: To test the questions ''Does cervical headgear treatment necessarily lead to a reduction of overbite?'' and ''Are there differences in treatment results due to different growth patterns or the initial overbite?'' Materials and Methods: Initial and intermediary casts of 247 patients who had been treated exclusively with headgear were analyzed for changes in the occlusal relationship of the first molars and overbite. Orthodontic treatment consisted of the application of cervical headgear with nonangulated external arms applied at a force of 3.5-4.0 N. Only patients showing dental changes of occlusal relationship Ն4 mm during at least a 6-month treatment duration were selected. Growth patterns were identified by the y-axis values measured on lateral cephalograms obtained at study entry. Six groups were formed on the basis of these growth patterns. Results: Headgear treatment induced bite deepening in patients with vertical growth patterns and bite opening in patients with horizontal growth patterns. Further subdivision based on initial overbite revealed bite deepening in patients with small initial overbite and bite opening in patients with large initial overbite. These differences were statistically significant (P Ͻ .05). Only minor changes were observed in patients with an initial overbite of 3-4 mm. Conclusions: Overbite reductions were not dependent on the growth pattern. Orthodontists should expect bite opening in deep-bite situations and bite deepening in open-bite situations. However, initial overbite situations of 3-4 mm should not be expected to change in a significant way.

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Effects of Cervical Headgear on Overbite against the Background of Existing Growth Patterns

Godt¹,

Kalwitzki²,

Göz

2007

The Angle Orthodontist

View full text Add to dashboard Cite

show abstract

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9. Extraorale Verankerung

Cited by 1 publication

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Effects of Cervical Headgear on Overbite against the Background of Existing Growth Patterns

Effects of Cervical Headgear on Overbite against the Background of Existing Growth Patterns

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