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Nowadays, endoscopic transcanal otosurgery with confident steps is becoming a practice. Obviously, any new method of intervention needs to be repeatedly tested by the surgeon before it is used on the patient. This is why dissection work is so important and popular. Working on biomaterial sets itself several tasks training manual skills of working with an endoscope and an instrument in the middle ear cavities, stage-by-stage training for performing specific interventions, detailed analysis and repetition of anatomy and topography of structur