Personally, I do not think you need cheek implants, however, what you have is classified as a Type 2 deformity on The Binder Scale. As per The Binder Scale, you would benefit from submalar implants. Here is the actual definition from the scale:
"Type II deformity: Atrophy of the midfacial soft tissues in the submalar area with adequate malar development is seen in the type II deformity. Patients with this deformity have wide or flat faces and benefit from the placement of a submalar implant."
You could also do a combination malar/submalar implant (used for a type 4 deformity), but many times the results are not good. Cheek implant surgery is a very tricky one.
Have you done any research? What surgeons have you looked into?
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