Nine years after a breast reduction there should not be a problem having your breasts enlarged with breast implants. The blood supply should have adequately reestablished to allow for a safe good result. You should consult with a Board Certified Plastic Surgeon to guide you through the process. There a several other issues that you should have addressed. What is the shape of your breast, where are and of what quality are your scars, where are your nipple areola complexes located and what size implants you desire. All these need to be considered before scheduling surgery.