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  Patronage of the Polish Society of Audiology and Phoniatrics

vol 13. no 2. June 2014  

 Original articles
Evaluation of BAHA implants stability in children
Wiesław Konopka, Józef Mierzwiński, Małgorzata Strużycka, Małgorzata Śmiechura, Renata Pepaś, Maria Drela

Introduction. Correct osseointegration capable of ensuring
good implant stability and direct conduction of the sound to the
cochlea is one of the pre-requisites for successful treatment of
hearing loss using bone-anchored hearing aids (BAHA).
Aim. To analyze the progression of osseointegration in infants
implanted with BAHA with regard to bone thickness, time elapsed
since surgery and type of cranial bone malformation.
Materials and methods. The study subjects comprised 24
children between 5 to 16 y.o., 17 boys and 7 girls, implanted
with BAHA at the ENT Departments. The implants were placed
unilaterally to the right (14 cases) and to the left (10 cases)
side. Implant stability quotient (ISQ) values were recorded
using resonance frequency analysis on an Ostel apparatus at
time of implantation and at the time of removal of the external
dressing at 7-10 days 5-6 weeks during the first adjustment of
the sound processor, and at the time of the follow-up visit six
months after surgery.
Results. No statistically significant differences were detected
between the stability results during each visit between the
groups of children with and without craniofacial bone malformations.
Significantly higher implant stability values were
recorded in the group of children with 4-5 mm bone thickness
during tests performed immediately after surgery in the older
children; the difference was noted only for the intraoperative
Conclusions. Bone thickness measurement during the surgery
is a major element and it may affect the decision about sound
processor startup. Within the studied group, the patients with
craniofacial bone malformations did not require longer time
since surgery till sound processor startup.

keywords: implant BAHA, dzieci, stabilność, BAHA implant, stability, children

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