Unfortunately, "Plastic Surgery" does not mean "scarless surgery."  In fact, much of what we do as plastic surgery involves removing excess skin, lifting, and thightening.  
However, plastic surgeons are highly trained and specialized in meticulous incision technique and wound closure.  Tension free closure of all anatomic layers, correct placement of sutures, and suture technique are critical factors for optimizing the scar quality.  
There are many factors which play into optimal healing some of which the plastic surgeon can control and some fall outside of our control.  Factors such as genetics, allergies, suture reactions, nutrition, and post operative care are equally important.
Healing after plastic surgery and be a simple straightforward process but can also be a long and arduous process.  If incision complications arise, it is our job to guide you through the healing process, take care of any issues, and work with you to help you body to heal.  

Sutures

Sutures are the surgical "needle and thread" we use to close your incisions.  The sutures vary in strength or thickness and and type of material.  
Sutures are placed in multiple layers to remove tension from the incision.  Generally for deeper wounds, sutures are placed into the fascia, the dermis, and the superficial skin.  The dermis is the skin layer under the epidermis or top layer.  This is divided into two layers:  reticular (deep) and papillary (superficial) dermis.  Skin sutures are generally placed into the reticular dermis and then skin for a two layer closure.