[Reconstruction of the facial skull using implant retained prostheses]. / Die Rekonstruktion des Gesichtsschädels mit implantatgetragener Epithetik.

Reconstructive surgery does not always provide for sufficient functional, cosmetic und esthetic results of bone defects, loss of soft tissues and sense organs. 57 patients were treated by the "Bochum study group for oro-facial rehabilitation" from 1990 to 1992 using implant-retained prostheses. The advantages of the "Snap-Button-System" used for retention are presented.

[Individual adjustment of tracheal valves in voice prosthesis patients with morphologically aberrant stoma relations]. / Individuelle Anpassung von Trachealklappen bei Stimmprothesenträgern mit morphologisch ungünstigen Stomaverhältnissen.

We present a new method of individual tracheal valve fitting for laryngectomized patients with voice prosthesis. In cases with morphologically poor tracheostoma the adhesion of the tracheal cannula or valve ring might be impaired by reduced contact surface to the skin. In some cases obligatory circumferential occlusion leads to stretching and higher tension of the adhering ring. Our technique of individual fitting with a silicon adapter permits airtight, tension-free adherence of tracheal valves, or, if desired, facilitation of stoma-closing with a finger, when the tracheostoma is deformed or too big.

[Experimental study of airflow in the main nasal cavity of the human using a nose model]. / Experimentelle Untersuchung der Strombahnen in der Nasenhaupthöhle des Menschen am Nasen-Modell.

Airflow patterns of nasal cavities in a human nasal fossa model were examined in this study. Our 1:1 model of the whole nose (both nasal fossae were moulded) gives a good insight into all parts of the nasal cavities. Staining of flow paths visualised that the main stream of air flow passes through the inferior nasal duct in inspiration and expiration. All regions of the nasal fossa were reached by fluid movements and could be marked with staining solution. Under static conditions laminar flow without turbulent profiles was seen in all sections of the nasal cavities. This technique of detection of flow characteristics in the nasal cavities provides a good tool for further research on flow and deposition characteristics of aerosols.