Yes, those are the challenges with breast implants and mammograms. Breast implants, especially the older breast implants, are leaking, and if you have the pressure of a mammogram it can cause more leakage and you can rupture the breast implant. The FDA warns against this, and I personally also warn my patients. Ultrasounds seem to be the best screening method for breast implants, and MRI is another option but an expensive option.
However, ultrasound should be a very good alternative, and it is not yet the rule to have that in Canada.