ABSTRACT
Prior to and after removal of the tonsils and adenoids at the ENT clinic in Lucerne, phoniatric and X-ray examinations were performed in 42 children with normal velo-pharyngeal closure. Prior to the operation the velo-pharyngeal closure took place against the adenoid tissue. The surface of contact and the inclinatation of the velum were dependent on the amount of hyperplastic adenoid tissue. The configuration and the mobility of the velum were more important for the post-operative velo-pharyngeal closure than the distance from the pharyngeal wall. 3 months following the operation the velum was reaching the posterior pharyngeal wall. A distinct Passavant ridge was only visible in cases having slight difficulties in the post-operative adaptation of the velo-pharyngeal closure.
