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  • Title: Changes in nasal volume after surgically assisted bone-borne rapid maxillary expansion.
    Author: Deeb W, Hansen L, Hotan T, Hietschold V, Harzer W, Tausche E.
    Journal: Am J Orthod Dentofacial Orthop; 2010 Jun; 137(6):782-9. PubMed ID: 20685533.
    Abstract:
    INTRODUCTION: The purposes of this study were to detect, locate, and examine the changes in transverse nasal width, area, and volume from bone-borne, surgically assisted rapid maxillary expansion (SARME) with the Dresden distractor by using computer tomography (CT). METHODS: Sixteen patients (average age, 28.7 years) underwent axial CT scanning before and 6 months after SARME. They also underwent CT fusion on specific bony structures. The nasal bone width was examined in the coronal plane. The cross-sectional images of the nasal cavity were taken of the area surrounding the apertura piriformis, the choanae, and in between. We calculated cross-sectional areas and nasal volume according to these data. RESULTS: All but 2 patients had an increase in nasal volume of at least 5.1% (SD, 4.6%). The largest value of 35.3% (SD, 45.8%) was measured anteriorly on the nasal floor, decreasing cranially and posteriorly. This correlated with the V-shaped opening of the sutura palatina. There was no significant correlation between increase in nasal volume and transversal expansion. CONCLUSIONS: Because most of the air we breathe passes over the lower nasal floor, SARME is likely to improve nasal breathing.
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