A Cephalometric Evaluation of Oropharyngeal Airway Changes Duing Twin-Block Appliance Treatment
| Main Authors: | M. J. Trenouth, S. R. Desmond |
|---|---|
| Format: | Article |
| Terbitan: |
, 2016
|
| Subjects: | |
| Online Access: |
https://zenodo.org/record/581958 |
Daftar Isi:
- Introduction: The research hypothesis under test was that functional orthopaedic treatment with the Twin-block appliance increases the oropharyngeal airway as well as correcting the jaw relationships in class II division 1 patients. Method: 20 cases, 10 male, 10 female. Age range: 11-18 years, average treatment time 9.4 months were randomly selected from the records of a previously completed prospective trial. Cephalometric radiographs taken before and after treatment were analysed. p, the shortest distance between the soft palate and posterior pharyngeal wall and t, the shortest distance between the tongue and the posterior pharyngeal wall were measured. Results: There was a statistically significant increase in both p and t after Twin-block appliance treatment (p=0.000). A control group selected from normative data matched individually for age and sex and treatment time showed no change over the same growth period. Conclusions: In Class II division 1 malocclusion, the oropharyngeal airway is already reduced compared to Class I and Class II. Treatment involving premolar extraction and incisor retraction further reduces the airway as does headgear and is contraindicated. Functional appliance treatment is the method of choice as it enlarges the oropharyngeal airway reducing the potential for obstructive sleep apnoea.