Implants
MINOR
The test implant, used in groups B and C, included the wide-diameter titanium implant (diameter, 4.5 mm; length, 4 mm) with 6-mm rounded, apically converging titanium abutment developed by Cochlear Bone Anchored Solutions AB (Mölnlyncke, Sweden). With an additional minor change to the internal abutment connection design, this system was later commercialized under the name Cochlear Baha BIA300 Implant and Abutment. The control implant, used in group A, included the previous-generation as-machined titanium Cochlear Baha flange fixture (diameter, 3.75 mm; length, 4 mm) with 6-mm conically shaped abutment from the same manufacturer. 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 implant (