Just wondering is my dental implant suppose to be fully tight after 3 weeks of surgery?

There are many reasons for that. it's my advice to visit your implant dentist. do not touch/feel that implant again and again. if dentist will feel, he may take an x-ray to check the surrounding bone condition.

A bonded tooth will help keep the teeth from shifting, so will an Essex bridge. Both are good temporary measures to hold things in place until you’re ready for your dental implant. They will serve “like a flipper”. I would recommend monitoring the area and if you start noticing shift...

Unless we have X-rays to review it is very difficult to say, what is the cause of the solid lump, but this is unusual post sinus lift surgery.  It could be any of these 1. An exposed implant 2. Exposed graft 3. Perforation of the sinus membrane It is difficult to make out but you...