My father had throat surgery because of cancer in 1974. The cancer has never returned however for the last 10 or more years he has had difficulty in swallowing. He is now 88 years old and in good health considering the sensitive throat. He had an MRI today at the hospital and it was determined that his epiglottis was not functioning properly. It would open sometimes and not other times allowing what he swallowed to go into his lungs. What are his chances in correcting this problem?