Evaluation of airway dimensions and changes in hyoid bone position following class II functional therapy with activator

ULUSOY M. Ç., CANIGÜR BAVBEK N., BALOŞ TUNCER B., TUNCER C., TÜRKÖZ Ç., Gencturk Z.

ACTA ODONTOLOGICA SCANDINAVICA, cilt.72, sa.8, ss.917-925, 2014 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 72 Sayı: 8
  • Basım Tarihi: 2014
  • Doi Numarası: 10.3109/00016357.2014.923109
  • Dergi Adı: ACTA ODONTOLOGICA SCANDINAVICA
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.917-925
  • Anahtar Kelimeler: airway, skeletal Class 2, functional therapy, hyoid bone, BEAM COMPUTED-TOMOGRAPHY, OBSTRUCTIVE SLEEP-APNEA, PHARYNGEAL AIRWAY, 3-DIMENSIONAL ANALYSIS, LATERAL CEPHALOGRAMS, ORTHOPEDIC TREATMENT, MALOCCLUSION, TONGUE, ADVANCEMENT, PROGNATHISM
  • Gazi Üniversitesi Adresli: Evet

Özet

Aim. The aim of this study was to evaluate the long-term effects of Class 2 functional treatment on airway dimensions and positional changes in hyoid bone and compare it with that of an untreated Class 2 control group. Methods. Lateral cephalograms of 16 patients (eight girls, eight boys, mean chronological age = 11.36 +/- 0.77 years) who were treated with activator and 19 patients (11 girls, eight boys, mean chronological age = 12.14 +/- 0.65 years) who served as control were used for linear, angular and area measurements regarding airway track and hyoid bone. Statistics. Intra-group comparisons were performed by paired t-test and Wilcoxon test, whereas independent t-test and Mann Whitney-U were used for inter-group comparisons. Results. During treatment (T2-T1), nasopharyngeal height and nasopharyngeal area increased (p < 0.05) and hyoid bone moved downward (H-SN; p < 0.001) and forward (H-C3; p < 0.01). During retention period (T3-T2); nasopharyngeal (p < 0.01) and oropharyngeal area increased (p < 0.05). H-SN (p < 0.01) and C3-H distances (p < 0.05) increased. Hyoid bone position exhibited significant changes (H-SN, p < 0.001; C3-H, p < 0.01). The increases in C3-H in long-term was more in the activator group than control (p < 0.05). Conclusions. In growing Class 2 patients with mandibular deficiency and airway track without obstructions, functional appliance treatment provided favorable effects on nasopharyngeal and oropharyngeal area throughout the retention period.