Objective: To compare the outcomes of the stapedotomies performed using Teflon prostheses with 0.4 mm and 0.6 mm diameters.
Materials and Methods: Pre- and postoperative audiograms of 52 participants, who had undergone stapedotomy, were evaluated retrospectively. Participants were divided into two groups according to the diameter of the prosthesis used for their surgery: Group 1 (0.4 mm) and Group 2 (0.6 mm). Air conduction (AC) pure tone thresholds at 250, 500, 1k, 2k, 4k and 6k Hz, and air-bone gaps (ABG) at 500, 1k, 2k, and 4k Hz, as well as pure tone averages (PTA), were compared within and between groups.
Results: The hearing gain, in terms of AC thresholds and ABGs, were statistically significant within both groups for each frequency (p<0.05). Pre- and post-operative PTAs and ABGs were similar between the groups (p>0.05). Whereas the preoperative AC thresholds were similar between the groups at all frequencies, postoperative AC thresholds of 0.6 mm group were better than 0.4 mm group at 2000 Hz (p<0.05). However, postoperative AC thresholds were similar between the groups at all frequencies other than 2000 Hz (p>0.05).
Conclusion: The outcomes of the stapedotomies with 0.4 and 0.6 mm Teflon prostheses were similar to each other in terms of postoperative hearing gain, pure tone averages, and air-bone gap. However, only at 2000 Hz, air conduction thresholds were found to be better in patients with 0.6 mm prosthesis, comparing to the ones with 0.4 mm.