Ionomerzement in der Cochlear-Implant-Chirurgie

 

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Zusammenfassung

Ionomerzement ist ein neues Knochenersatzmaterial, das sich, nachdem es sich als Ossikelersatz in der Mittelohr-, Schädelbasis- und plastisch rekonstruktiven Chirurgie bewährt hat zur Fixierung des “internal receiver” und der Elektrode eines Cochlear-Implant-Systems eignet. Das Material bindet ohne Hitzeentwicklung ab, bleibt über etwa 5 Minuten verarbeitungsfähig und bietet sich so als Alternative zu herkömmlichen Verfahren zur Fixierung von Cochlear-Implant-System-Teilen an der Gehörgangshinterwand und der Kalotte an.

Summary

Ionomer-based cement is a new bone replacement material. After promising results have been obtained with this material in middle ear and skull base surgery as well as in plastic reconstructive surgery, this material can be used to fix a cochlear implant system (internal receiver as well as the electrode) to the temporal bone. This material is formed via a reaction of a glass powder with a polycarboxylic acid. The cement has a manipulation period of about 5 minutes. After setting, the cement is well tolerated by tissue and has the additional advantage of being biocompatible and permanently stable in a biological environment. The cement and the acid are commercially available as a two-component capsulated system. In cochlear implant surgery this material is used to achieve a stable attachement of the internal receiver to the temporal bone. Displacement and damaging of the internal receiver and the electrode are prevented.