Stability testing after osseointegrated implant surgery without skin thinning in children: case reports after abutment loss.
OBJECTIVE
To evaluate 2 cases of implant loss after osseointegration using low-resonance frequency analysis.


METHODS
Ten children were operated on consecutively with the non-skin-thinning implantation of bone-anchored hearing devices. A capsule report was completed with 2 children who experienced loss of their abutments 3 to 4 weeks after implantation.


METHODS
Eligible children for bone-anchored hearing device implantation were operated on and followed for a total of 1 year. Visits were planned for 1 week, 3 months, 6 months, and 12 months after surgery. Each visit included clinical controls and a stability test with Osstell's resonance frequency analysis measurement, using stability values from 0 to 100 (representing a range of low to high stability, respectively). Of the 10 cases, two were performed as a 2-step, whereas the other 8 were performed as a 1-step non-skin-thinning procedure.


RESULTS
Two of the children (1 two-step and 1 one-step) showed low-resonance measurements of 30 or less after surgery. Both of these children lost their abutments early after surgery. These children had no skin-related problems at the time of abutment loss.


CONCLUSIONS
It may be possible to predict abutment loss in children with primary resonance values lower than 30.
*Department of Otorhinolaryngology, Karolinska University Hospital, Stockholm, Sweden; and †Washington University, St. Louis, Missouri, U.S.A.
Malou
M
Hultcrantz
Aviya
A
Lanis
D001844:Bone Conduction; D002648:Child; D002675:Child, Preschool; D003638:Deafness / Q000601:surgery*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D016348:Osseointegration; D011446:Prospective Studies; D019919:Prosthesis Implantation / Q000009:adverse effects / Q000379:methods*; D012871:Skin Diseases / Q000209:etiology / Q000517:prevention & control*; D053441:Suture Anchors; D016896:Treatment Outcome