Does hyrax expansion therapy affect maxillary sinus volume? A cone-beam computed tomography report
Imaging Science in Dentistry
;
: 83-88, 2012.
Article
Dans Anglais
| WPRIM
| ID: wpr-145814
ABSTRACT
PURPOSE:
The aim of this study was to investigate the initial effects of maxillary expansion therapy with Hyrax appliance and to evaluate the related changes in maxillary sinus volume. MATERIALS ANDMETHODS:
Thirty patients (20 females, 10 males; 13.8 years) requiring maxillary expansion therapy, as part of their comprehensive orthodontic treatment, were examined. Each patient had cone-beam computed tomography (CBCT) images taken before (T1) and after (T2) maxillary expansion therapy with a banded Hyrax appliance. Multiplanar slices were used to measure linear dimensions and palatal vault angle. Volumetric analysis was used to measure maxillary sinus volumes. Student t tests were used to compare the pre- and post-treatment measurements. Additionally, differences between two age groups were compared with Mann-Whitney U test. The level of significance was set at p=0.05.RESULTS:
Comparison of pre-treatment to post-treatment variables revealed significant changes in the transverse dimension related to both maxillary skeletal and dental structures and palatal vault angle, resulting in a widened palatal vault (p<0.05). Hard palate showed no significant movement in the vertical and anteroposterior planes. Nasal cavity width increased on a mean value of 0.93mm(SD=0.23, p<0.05). Maxillary sinus volume remained virtually stable. No significant age differences were observed in the sample.CONCLUSION:
Hyrax expansion therapy did not have a significant impact on maxillary sinus volume.
Texte intégral:
Disponible
Indice:
WPRIM (Pacifique occidental)
Sujet Principal:
Technique d'expansion palatine
/
Palais osseux
/
Tomodensitométrie à faisceau conique
/
Hyrax
/
Sinus maxillaire
/
Fosse nasale
Limites du sujet:
Femelle
/
Humains
langue:
Anglais
Texte intégral:
Imaging Science in Dentistry
Année:
2012
Type:
Article
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