© 1988 by European Orthodontic Society
The development of the pharyngeal space and lymphoid tissue on the posterior nasopharyngeal wallan assessment with regard to heritability
Karolinska Institutet Huddinge, Sweden
*King's College Dental School London
1H Billing Dept of Orthodontics, Karolinska Institutet School of Dentistry Box 4064, Huddinge, Sweden
A study was made on 19 monozygotic and 23 dizygotic twin pairs to examine the extent to which genetic factors determine pharyngeal space variations. Heritability quotients were determined for four variables expressing soft and hard tissue pharyngeal space. Findings obtained indicate that genetic factors have a considerable influence on the size of pharyngeal space, the thickness of the posterior nasopharyngeal wall and the nasopharyngeal airway.
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