This study aims to demonstrate patient benefit abutment-free devices, compare the results of the two abutment-free devices, and examine complication rates.
A retrospective chart review was conducted for the first eleven Sophono implanted patients and for the first six patients implanted with the BAHA Attract at our institution. Subsequently, we analyzed patient demographics, audiometric data, clinical course and outcomes.
Average improvement for the BAHA Attract in pure-tone average (PTA) and speech reception threshold (SRT) was 41 dB hearing level (dBHL) and 56 dBHL, respectively. Considering all frequencies, the BAHA Attract mean improvement was 39 dBHL (range 32–45 dBHL). The Sophono average improvement in PTA and SRT was 38 dBHL and 39 dBHL, respectively. The mean improvement with Sophono for all frequencies was 34 dBHL (range 24–43 dBHL).
Significant improvements in both pure-tone averages and speech reception threshold for both devices were achieved. In direct comparison of the two separate devices using the chi-square test, the PTA and SRT data between the two devices do not show a statistically significant difference (p-value 0.68 and 0.56, respectively). The complication rate for these abutment-free devices is lower than that of those featuring the transcutaneous abutment, although more studies are needed to further assess this potential advantage.