Title: 0271 - Effect of the Bite Jumping Appliance on Pharyngeal Airway Dimensions


Vincenzo D'Antò (Presenter)
University of Naples Federico II

Roberto Rongo, University of Naples Federico II
Paola Festa, Bambino Gesù Childrens' Hospital
Giulio Alessandri Bonetti, University of Bologna
Angela Galeotti, Bambino Gesù Childrens' Hospital
Ambra Michelotti, University of Naples Federico II


Objectives: To investigate the effects of the Sander II Bite Jumping Appliance (BJA) treatment on the pharyngeal airway passage (PAP) of growing subjects with Class II division 1 malocclusion due to mandibular retrusion.

Methods: Thirty-four skeletal Class II malocclusion subjects (21 males, 13 females; mean age 11.1±1.2 years) with mandibular retrusion were treated by means of BJA. The control group consisted of thirty-four skeletal Class II malocclusion untreated subjects (25 males, 9 females; 10.4±1.2 years). The effect of BJA appliance was evaluated on lateral cephalograms recorded prior-to (T0) and after the period of observation (T1) (14.8±5.8 months) and the changes in the BJA group were compared with the changes in the control group subjects. The data distribution was evaluated by means of Shapiro-Wilk test. Student’s t-test and Mann-Whitney U test were used for statistical analysis according to the distribution of the data. P-value of 0.05 was considered statistically significant.

Results: The depth of the oropharynx and the hypopharynx did not increase significantly in the treatment group as compared to the control group (P=0.314; P = 0.509). The tongue height (th) increased significantly in the BJA group, compared to pre-treatment values (th=2.8±3.7; P < 0.001) and to the control group (P = 0.038).

Conclusions: The pharyngeal dimensions increased both in treated and untreated subjects. Upper airway changes did not significantly vary in patients treated with BJA compared to control subjects.

Disclosure Statement:
The submitter must disclose the names of the organizations with which any author have a relationship, the nature of the relationship, and the clinical or research area involved. The following is submitted: NONE