The simplest way to create high cheekbones is with facial filers. I actually like to do this with patients considering implants to make sure they like the look before embarking on a surgical procedure.
Hyaluronic acid fillers are easiest and can be reversed if you don't like the result (which almost no one requests). For longer lasting results, Radiesse is the product of choice.
Surgical cheek implants, called malar augmentation is performed with silastic, solid silicone, or Medpor implants that are placed under anesthesia through the mouth. Numerous sizes and shapes are available. For total customization, custom cheek implants can be made that are based on modifying existing sizes or for unusual or asymmetric faces, on a 3-D model of the patient created from a CT scan.