How will hot saunas affect implants?

Hello! I have been hearing more and more about possibility that sauna can melt the implants. I would realy appreciate a proffesional either to confirm or debunk this. Hot sauna (over 200 F) and cold plunge were my routine almost everyday but I have stopped since I heard about a possibility to melt my implants. I have done mine in May of 2020, 750cc each of "gummy bear". Thank you