I’m in the same situation with my implants and they are saline filled, I was first given silicone but back then the silicone was liquid and it caused so many problems. I lost my breasts after having children and I was only 26, my little breasts looked like deflated balloons and the bras we had weren’t as well made as today. I went through hell with this decision but it’s a long story, I am 74 and due next month for a mammogram but I’m not sure if I will have it, my doctor feels that I should still have one because I’m a cancer patient, I have had ultrasound done on a few occasions but it’s not very thorough because of the density of the implant. I think you’re in a better place because you have the newer silicone that isn’t liquid so even if you have a little opening it won’t leak out into your body, they were specially designed to stop leaks because years ago some women got very sick from the gel going through their body. I have tried years ago to get them removed but they won’t do anything unless I let them put new ones in, I don’t want new implants because it would be absurd, can you imagine an older woman with an older body getting new breasts, it’s like hanging a new chandelier in an old house lol, I don’t think you have anything to worry about with the new ones and good luck with your surgery.