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The effect of functional appliances on the skeletal pattern
1Orthodontic Department, UMDS, Guy's Hospital, London.
British Journal of Orthodontics
|November 1, 1991
Summary
This review of 26 studies on Andresen and Fränkel appliances shows consistent results. Maxillary advancement is not significantly affected, while mandibular growth shows a slight vertical increase, similar to conventional appliances.
Area of Science:
- Orthodontics
- Craniofacial Development
Background:
- Class II division 1 malocclusion is a common dental issue.
- Orthodontic appliances aim to correct skeletal discrepancies.
Purpose of the Study:
- To review and synthesize findings on Andresen and Fränkel appliances.
- To compare treatment effects with a control group of untreated individuals.
Main Methods:
- Systematic review of 26 cephalometric radiography studies.
- Meta-analysis of combined data.
- Comparison with a control group of untreated Class II division 1 individuals.
Main Results:
- Consistent findings across studies regarding appliance efficacy.
- No significant inhibition of maxillary advancement (slight reduction in SNA angle observed).
- Slight increase in vertical mandibular growth, comparable to conventional appliances.
- Wide individual variation in treatment response.
Conclusions:
- Andresen and Fränkel appliances demonstrate consistent effects on Class II division 1 malocclusion.
- These appliances promote mandibular growth with minimal impact on maxillary advancement.
- Individualized treatment responses necessitate careful patient selection and monitoring.