No. Plastic surgery is also called cosmetic surgery. Basically, it's surgery that specializes in the reconstruction, altering, or modification of the body. For example: breast implants, chin...
Plastic surgery is needed for reconstruction of the shape of parts of the human body which might be affected by trauma, burns or iatrogenic causes. Also, plastic surgery can be performed for...
They mean the same thing, although plastic surgery will sometimes be referred to as reconstructive surgery (procedures that corrects defects on the face or body) as well.