You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Cause of myringosclerosis is and explain in detail?
Grommet inseion is preferred if myringotomy and aspiration combined with medical measures have not helped and fluid recurs, a grommet is inseed to provide continued aeration of the middle ear. It is left in place for weeks or months or till it is spontaneously extruded. Ref - PL DHINGRA diseases of ear nose and throat, 6th edition, page no 65