n. 1  The act or process of dividing. 2  Cell division. 3  The operation of determining how many times one quantity is contained in another; the inverse of multiplication.
Research is looking at implant reconstruction with a tissue expander using a dermal matrix product to cover the implant compared to using skin and muscle to cover the implant. The dermal matrix essentially forms a âslingâ that helps form a pocket and support the lower portion of the implant, holding it in position.
Implants are usually placed as part of a two-stage procedure. 1  In the first stage, the surgeon places a device, called a tissue expander, under the skin that is left after the mastectomy or under the chest muscle (1,2). The expander is slowly filled with saline during periodic visits to the doctor after surgery.