Can denture rocking back and forward be stopped?

There are three options to stop the rocking and breaking of the denture. The first solution would be to make a new prosthesis that covers the palate, because Locator attachments, which I assume these are, have a freedom of movement that can contribute to the rocking and subsequent breaking. Covering the palate will add to the denture support and stability, allowing the attachments to act as they were designed for retentive purposes. The second solution, which would be more costly but allow for an open palate, would be to fabricate a prosthesis with a milled bar. This design would add significantly to the denture stability and retention but still be removable. The last option, which would be the most costly, would be to fabricate a Diem design prosthesis which would consist of a permanently fixed bar retained denture that is not removable. Both the second and third solutions require that the prosthesis be shortened in order to follow the A-P spread rule unless additional implants are added distally. You have not included an image of your current denture, but I suspect that the breakage occurs because the denture extends too far back.

Comments above by Dr. St Germain are accurate and all inclusive.

First of all, there is no such thing as an "implant specialist". There are specialists who do implants, and there are general dentists who do implants. Your implants seem to be well placed. This is a prosthetic problem. The breakage is because the denture base is not strong enough. It is advisable to use a cast metal base for removable implant prosthesis. This prevents breakage. The rocking of the denture implies a lack of fit. The implants and the implant attachments should secure the denture, that is, give it retention so it doesn't easily come out. Four implants should definitely be enough to provide adequate retention. But a removable appliance still must fit against the underlying gum. I also believe that full palatal coverage rather than a horseshoe design will increase the stability of the prosthesis.

You need to look for a prosthodontist. I agree, the implants look reasonably placed but the prosthetic design is poor. Locator overdenture attachements and a plastic horseshoe will do exactly what you are describing; perform poorly, rock and break. A bar retained overdenture with a metal reinforced horseshoe denture is a start as is a fixed restoration (ala the diem mentioned above). Go to an experienced reconstructive dentist (prosthodontist) to get a correctly fabricated prosthesis. You will pay a little more but you'll get it done right the first time.

Hello You need to get a balanced and strong prosthesis. The best for you would be to get a fixed screw retained prosthesis. Best of luck

I have the same issue with my implant supported dentures. 6MDI upper, 4MDI lower. Both rock forward & backward. They have been remade numerous times, all with same results, and I won't mention Aspen Dental as the place I unfortunately chose for my dental work. Best of luck in getting satisfactory results. When I can afford it, I will be seeking a Prostodontist myself.

I had DDS do my denture implants , 4 implant rods up top & 2 on bottom but he put wrong size rod in bottom right side .,, it’s a mini rod , won’t stay on at all ,,, what to do ?? Thanks