<s>[INST] I got new dentures and it was awesome to be able to eat things I hadnt been able to in a long time. But the new dentures made my jaw and mouth feel tired and heavy.  Unfortunately I also got very ill and was not able to go back to the denturist.  About a month ago I was eating my dinner and all of a sudden I could no longer chew. My bottom jaw fell really heavy and like jelly.  I was finally able to go back last week and they filed them down but they still feel too heavy and I still cant chew for any length of time because my jaw wont work properly.  I dont have any pain but when i chew my jaw does click. [/INST] Hello, Welcome to Chat Doctor .com.  I had read your query thoroughly and gone every bit of it.  It seems to me because of muscle spasm you are feeling heaviness of jaws.  As you had a jaw relationship developed during the past period without dentures and your muscles got developed as per it. Now when you started wearing dentures, new jaw relations will take some time to develop.  You need to wear dentures intermittently for some period only during eating and other important occasions. Also apply hot cotton on the place 2-3 times daily 10 minutes for each time.  Avoid too hard food.  Also keep you dental prosthesis clean to avoid fungal infections.  If it is painful and annoying you can take oral muscle relaxants like colchicine or cholorozozaxone.  Hope my answer will help you, and you will be healthy soon. Please write to us if you need any further help. Regards Chat Doctor.  </s>