Is it really necessary to wear the strap over the breast implants after breast augmentation to help the implant drop?

Gravity can sometimes do the trick but it is best to actively correct the problem with a bra strap, specially in the very early phase of healing.  Once a capsule is formed the implant cannot be repositioned with outside pressure or gravity.  

Not every patient needs one but they can be helpful for some patients.    If your physician  feels this is the best post op course for you I would follow his/her professional advise.    If you have questions make an appointment with your physician.Good Luck

It is common to use a strap and bra to stabilize the implant in the pocket during healing and prevent unwanted stretching of the pocket.  The strap many also provide some gentle downward pressure on the lower pocket to help stretch it out, but this will also typically  happen over time due to the weight of the implant as the swelling resolves and the tissues themselves relax.  To me it doesn't seem to matter much, as time is the most important ingredient to all of this.  However, I would recommend you follow your surgeons advise.  This is a matter of surgeon preference, so ask your surgeon.