Top all on 4 implant feels loose? My top implant isn’t secure and moves slightly. (Photo)

All fixed implant prostheses should be stable and remain without any movement. The best way to confirm that there is no movement is, removing the prosthesis and checking the implant prosthetic parts (multiunit abutments, prosthetic screws and finally implants) whether they are unscrewed or not. If the prosthesis is fitting onto the implants passively, there should be no movement. If you feel any movement, this needs to be taken care of to avoid further complications such as prosthetic screw fracture, prosthesis fracture and even implant fracture

Movements can be because of various reasons which depend on if you have healing abutments or you have screw in Temporary teeth in your mouth. Various causes: 
1. Screw loosening in your healing abutment screw although implants are secure.
2. Screw loosening in your screw-in temporary/ permanent prosthesis screw if you have put too much pressure. Or direct load is coming on the implant screw 
3. Multiunit abutment have become loose due to extra load on your temporary prosthesis
4. Implants itself have become loose and not anchored or fused with the bone during healing or they are still in healing stage.

First three types can be checked and managed in an inconsequential manner but the fourth type needs to be reviewed and kept on follow up. I would advice you to visit your dentist as early as possible. Hope that information helps.

Hi @squareeyes
You should definitely experience no looseness of any type of implant treatment, including All-on-4. When did you have your implants placed? Sometimes over time, the screw(s) attaching your prosthetic teeth to the implants may be coming loose or may have broken, and more rarely a connecting abutment between the implants and teeth may come loose. Both of these issues can be corrected easily, but if left unattended can lead to more irreversible problems. For an implant to be loose itself, it would usually involve some degree of pain or discomfort, or inflammation - that would indicate a failure. In any case, it's very important to have it professionally assessed as soon as possible. If you felt brushed off, just call again and ask for the dentist to review it. Hope that helps.
*This is general information only. Please see an experienced implant dentist in your area for a proper assessment.