Participants
Patients who underwent type-1 tympanoplasty due to COM between January 2013 - December 2018 enrolled in the study. Only patients with conductive hearing loss and simple pars tensa perforation of the tympanic membrane were included in the study. Patients with PCG, ICG, and WsCCG grafts, patients older than 18 years of age, patients with air conduction threshold less than 50 dB, and patients with bone conduction threshold less than 20 dB were included in the research. Also, the patients aged < 18 years old, patients with cholesteatoma, tympanosclerosis, an ossicular chain defect, bilateral chronic otitis media, adhesive otitis or retraction pockets, pars flaccida perforations, total or subtotal perforations were eliminated.