Am I at risk for developing mastitis if I move forward with breast implants?

Dear zoom2,
If you are considering a surgery, I would suggest you to consult a board-certified plastic surgeon. Only after a thorough examination you will get more information and recommendations.
Daniel Barrett, MD
Certified, American Board of Plastic Surgery
Member, American Society of Plastic Surgery
Member, American Society of Aesthetic Plastic Surgery

Your history is important to relay to your surgeon. I have had patients with a similar history who have had no problems with their recovery after breast augmentation surgery.Dr. Ted Eisenberg, Board Certified Plastic Surgeon and Author

Implants are placed with meticulous sterile technique to minimize any risk of infection. For patients with a history of mastitis, I prefer to avoid incisions through the breast tissue and use incisions along the crease and place the implants below the muscle away from the breast tissue. Since it has been 6 years since your last infection, it is unlikely that you will have issues if the breast implants are placed carefully!Johnson C. Lee, MD
Board-Certified Plastic Surgeon
IG: @drjohnsonlee

It does not sound like the placement of implants will cause you to have mastitis, but I would recommend the surgery be done through the lower breast fold instead of an incision in the area of the nipple.