Silicone in one breast, saline in the other?

I had a skin-sparing mastectomy last fall, R breast, and a tissue expander inflated to 450 mL.  For my implant surgery (in a week from today), I plan to have a small implant in the L breast for symmetry/consistency.  My plastic surgeon plans to use a silicone round implant for the R (mastectomy) side, and an inflatable round saline implant on the L side, under the muscle.  The saline on the L side is so that, during surgery, it can be inflated to a size that best matches the R breast.  She says it won’t feel any different.  I’m not convinced this is the way to go.  Is this a viable approach that plastic reconstruction surgeons use?  Is there a better approach?  Thank you for any information you can provide!


F, 59, British Columbia