IRCT20171004036554N3 IRCT 2021-01-06 Tehran University of Medical Sciences Comparison of Surgical Outcomes of Endoscopic and Microscopic Surgery in Patients diagnosed as Otosclerosis Disease Comparison of Surgical Outcomes of Endoscopic and Microscopic Surgery in Patients diagnosed as Otosclerosis Disease 2020-11-09 anticipated 64 Complete https://irct.ir/trial/53312 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Randomization description: The randomization type is blocked randomization. Foursquare blocks of intervention group(A) and control(B) are defined on cards 1-6 (AABB,ABAB,ABBA,BBAA,BABA,BAAB), the cards are placed inside the envelope. Then cards are selected randomly and then the random string is created from the sequence of selected cards. Patients in the intervention and control group are included in the study according to this sequence. N/A Otosclerosis Disease. Intervention 1: Intervention Group: In this group surgery is performed using an Endoscope device that includes an Endoscopic Camera and Lens, through the Auditory Canal. Intervention 2: Control Group: In this group surgery is performed using a Surgical Microscope. This procedure usually requires an incision behind the ear for better access during surgery. Undecided - It is not yet known if there will be a plan to make this available Justification or reason for indecision in sharing IPD is There is no more information.