Evaluation of the long-term results with a highly porous hydroxyapatite ceramic for the obliteration of open mastoid cavities.

Introduction Alloplastic and autologous materials are available for the reduction of open mastoid cavities. Highly porous hydroxyapatite matrix material (HMM) is used with stable long-term results in oral and maxillofacial surgery. Its use in middle ear surgery is rare. The literature research on the revision rate in mastoid cavity obliteration shows only few data on long-term results with alloplastic material. Revision rates between 0 and 38 % are reported.

The aim of the study was to analyse the long-term results of HMM in mastoid use.

Methods Patients who underwent tympanomastoid surgery in chronic otitis media between 2005 and 2013 or revision surgery under the aim of open mastoid cavity obliteration with HMM were examined. Patients received computed tomography (CT) and magnetic resonance imaging (MRI) to investigate osseoinduction and osseointegration of HMM and the presence of cholesteatoma.

Results Patients were re-examined after a mean follow-up period of 88.3 months after obliteration of the open mastoid cavity with HMM. At follow-up there was a significantly reduced ABG compared to the preoperative measurement.

1 patients (91 %) received a CT scan and 17 patients (74 %) received an MRI scan.

A total of 17 cases (74 %) required revision surgery. In 4 patients a recurrent cholesteatoma was found during the follow-up examination.

Conclusions HMM leads to insufficient cavity reduction, a high rate of revision surgery and a difficult distinction between recurrent cholesteoma and granulation tissue in CT-scans.

Poster-PDF A-1074.PDF

Publication History

Article published online:
10 June 2020