Silent aspiration...?

My son was diagnosed with dysphagia, I have to thicken his liquids all the time because he has a problem with thin liquids, the thin liquids goes to his lungs not all the time but he did aspirate a few times when they did the swallowing test on him. The doct. told me that this problem usually goes away with time, since he is only 9 months, I am taking him to occupational therapy every week, Can dis problem disapear with time? Does anybody know anything or have had an experience with this problem??

Question- Why OT, when a speech pathologist has a better understanding of the upper aerodigestive tract? Where I come from, OTs do feeding training (getting it to the mouth), not dysphagia therapy.
With that being said, I would NEVER give a patient anything by mouth if silent aspiration was the case. By definition, the patient lacks sensation in the airway and will not reflexively cough up material that is in the airway. This will result in one lung infection after another.
If it was my child, I would insist on a gastrostomy or PEG tube (percutaneous endoscopic gastrostomy) so his airway and lungs would be protected from everything but saliva. I'd seek out a pediatric speech pathologist who specializes in dysphagia and have him/her do the therapy and all further swallowing studies. Effective therapy CAN be done without airway compromise.
He may outgrow this, depending on the reason for the reduced airway sensation; he may just be a bit slow in developing reflexive behaviors.
Hang in there, be patient, and find the right professional to help your kid. Protecting his health is the #1 priority.

should go away in 1 month