How long to wear spanx after Tummy Tuck?

Postoperative instructions after a tummy tuck (or any surgery) vary from plastic surgeon to plastic surgeon. In my practice, patients with prolonged swelling are encouraged to wear their support garments until the swelling subsides. Some of those patients have told me they feel uncomfortable at the end of the day without the support. I would be surprised if the stomach muscles became dependent on the garment. Patients in my practice who have used abdominal support garments for longer periods of time have been able to transition off wearing them without any problems. 

Surgeons vary in terms if their aftercare following tummy tuck procedure. Wearing the garment/binder for 4-6 weeks after surgery is almost standard. Beyond that point, the decision to wear it, remains individualized. Best is to consult with your surgeon. However, healing from tummy tuck surgery is a 6 months' process. I have seen patients wearing it that long for comfort.