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The microbiological profile of the bone-anchored hearing system.

Poster
Authors Martin L Johansson
Margarita Trobos
Omar Omar
Sofia Jonhede
Hanna Peters
Maria Hoffman
Peter Thomsen
Malou Hultcrantz
Published in 7th International Symposium on Bone Conduction Hearing and Related Technologies (OSSEO), At Miami beach, FL, USA
Publication year 2019
Published at Institute of Clinical Sciences, Department of Biomaterials
Language en
Subject categories Biomaterials Science, Microbiology in the medical area

Abstract

Purpose The aim of this study was to evaluate methods for bacterial sampling and to acquire insight into the role of the microbiota on the clinical outcome of BAHS. Methods and Materials For the identification and quantification of colonising bacteria, 3 sampling techniques from 3 different compartments were evaluated: (i) retrieval of abutments, (ii) sampling of the peri-abutment exudate using paper-points and, (iii) sampling of the peri-abutment soft tissue using a biopsy punch. Results Quantification of viable bacteria was possible from all three compartments. At baseline the soft tissue was mainly colonised by anaerobic bacteria. Anaerobic bacteria and Staphylococcus spp. were subsequently detected in all three compartments at 3 and 12 months. During the one-year follow-up, the common skin coloniser Staphylococcus epidermidis was present at the implant site in most patients whereas Staphylococcus aureus was present in half of the patients. Several associations between clinical and microbiological parameters were found. Conclusion This study confirmed a suitable study design, sampling and analytical methodology to quantitate, describe and isolate the bacterial species associated to BAHS. Characterising the microbiota present at different sites surrounding BAHS as well as elucidating their associations with clinical parameters and host response markers may have relevance for the outcome following implantation.

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