Abstract:

Purpose: This study is aimed at comparing the functional results of the hydroxyapathite partial oxycular replastic protection (HA-PORP), hydroxyapathite bone cement (HA-BC), otogreft incous interposition (OII) methods used in the reconstruction of isolated incous defects. Method: The research is retrospective. Patients are divided into 3 groups according to the method of oxycloplasty used: HA-PORP, HA-BC, and OII. Patients with only middle ear risk index (MRI) ≤2 were included in the study in order to ensure the homogenity of the groups. The patient’s sociodemographic characteristics, pre- and postoperative odyological findings and the success of the surgery were assessed and compared between groups. Results: there were 26 patients in the HA-PORP group, 20 in the HA-BC group and 28 in the OII group. The postoperative odyometric measurement time was estimated at an average of 22.7 ± 6.3 months. In all patients, the pre-operative pure sound average (SSO) was 46.5 ± 11.6 dB, the air bone range (HKA) 32.6 ± 9.4 dB, the postoperative SSO 26.7 ± 7.1 dB, the HKA 14.3 ± 6.6 dB, and the HKA earnings were 14.2 ± 6.4 dB. After the operation, the HKA was detected at 88.5% of patients in the HA-PORP group, at 85.0% in the HA-BC group, at 85.7% in the OII group at 20 dB and below, but there was no statistically meaningful difference between the groups (p=0.932). The HKA earnings in the HA-BC group are 20.9 ± 10.2 dB and 14.5 ± 10.0 in the OII group, with a significant average of 4.2 ± 1 in the HA-BC group according to the OII group. 9 dB more HKA gain was detected (p= 0.038, CI95%: 0.2 - 8.2 dB). The result: in the reconstruction of isolated ink defects, the HA-BC technique was found to be more advantageous than the OII technique. However, in general, all three techniques have similar results. For successful outcomes after oxycloplasty, other factors such as the state of the middle ear, the surgical experience, the front tube function should also be taken into account.

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