The adequacy of the nasopharyngeal airway has been found to be related to craniofacial development in that obstruction of the airway by excess adenoidal tissue, nasal septal deformity or other abnormal morphology in the area is associated with characteristic changes in craniofacial morphology. The present study investigated the differences in nasal airway resistance, (to include the laminar and turbulent components), craniofacial morphology and head posture between a control group and an anomaly group exhibiting full transverse cusp bilateral crossbites and further investigated the changes that occurred in these parameters when the anomaly group was treated using rapid maxillary expansion. The method error of both the measurement system for cephalometry and nasal airway resistance was tested by duplicate determinations and subsequent statistical analysis, as was the method error of the operator. All the variables in the study were found to be reproducible without systematic error and with a very small method error. The results of the rhinomanometric readings showed that there were significant differences in nasal airway resistance between the control and anomaly samples, and that significant changes in nasal airway resistance occurred in the anomaly subjects when they were treated with rapid maxillary expansion. However when head posture was investigated, no significant differences in craniocervical angulation were discovered between the control and anomaly samples, or between the anomaly sample before and after treatment. The craniofacial morphology values, measured using lateral cephalometric radiographs and postero-anterior radiographs, were found to exhibit some significant differences between the control and anomaly subjects, and to exhibit some significant changes where the anomaly sample was treated with rapid maxillary expansion.

The effect of rapid maxillary expansion on nasal airway resistance, craniofacial morphology and head posture

The present paper describes the craniofacial form of subjects with maxillonasal dysplasia and reports its occurrence in two siblings who also have cleft palate and mandibular retrognathia....

Maxillonasal dysplasia, mandibular retrognathia and cleft palate.

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Maxillonasal dysplasia, mandibular retrognathia and cleft palate.