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[Experimental studies of chondrosynthesis for the larynx]
R Siegert1, E Zimmermann, H Weerda
1Klinik für Hals-, Nasen- und Ohrenheilkunde, Medizinischen Universität zu Lübeck.
Unlabelled:
The aim of this study was to develop and investigate techniques for stabilising and reconstruction of defects in the larynx similar to osteosynthesis.
Material And Methods:
(1) 400 extrusion forces of sutures and various screws (Howmedica) in thyroid cartilage of fresh cadavers were measured. (2) A new screw specially designed for cartilage was developed. (3) A new technique for stabilising cartilage with a screw nut made out of bone was developed.
Results:
The extrusion forces correlate with the calcification of the laryngeal skeleton depending on the investigated area of the thyroid cartilage and the type of suture and screws that are used, respectively. Besides the increased extrusion forces the advantages of chondrosynthesis are the possibility of axial stabilisation and of exact bridging of defects with or without implants.