10-year Follow-up of a Wide Diameter Bone Anchored Hearing Implant

The control implant included the previous generation as-machined titanium Baha® flange fixture (diameter 3.75mm; length 4mm) with 6mm conically shaped abutment.

The test implant and the implant used for the 3-week loading trial included the wide diameter titanium implant (diameter 4.5mm; length 4mm) with 6mm rounded, apically converging titanium abutment developed by Cochlear Bone Anchored Solutions AB (Mölnlyncke, Sweden). This system with an additional minor change to the internal abutment connection design was later commercialized under the name Cochlear™ Baha® BIA300 Implant with abutment. In addition to the difference in abutment shape and the wider diameter, the test implant incorporates small-sized threads at the implant neck and the moderately rough TiOblast™ (Dentsply, Mölndal, Sweden) surface on the intraosseous part of the implant6-8.

Loading the implant at 3 weeks after implantation (instead of 6 weeks after implantation)