How do I test my skin elasticity in my breasts to prepare for an explant?

Dear VW0481,it is hard to tell for sure without an examination. Skin elasticity  depends mostly on genetics so you can't do much to increase or decrease it. Also, implants size have a great influence on amount of sagging. You might want to consider fat grafting in order to replace some of the lost volume. If you are considering a surgery, I would suggest you to consult a board-certified plastic surgeon. Only after a thorough examination you will get more information and recommendations.Daniel Barrett, MD
Certified, American Board of Plastic Surgery
Member, American Society of Plastic Surgery
Member, American Society of Aesthetic Plastic Surgery

There is no specific test that will address elasticity.  The breast implant volume and the length of time the implants have been in place will influence how much the skin has been stretched.  If the breasts appear droopy or saggy currently then you can anticipate that a lift will be needed in order to improve shape.

In general, the smaller the implant and the less the amount of time it has been since placement, the greater the chance the breasts will return to their preoperative state.  The appearance of the breasts will not be as nice as the appearance of the breasts prior to breast augmentation.  If the breasts had a lot of ptosis or droop prior to the breast augmentation, you may want to consider a lift at the same time as removal.  If you were borderline, then explant and wait for 6 months or so and then reevaluate.