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.
Placing the Expander. At the time of the initial post mastectomy reconstruction operation, when it is first positioned on the chest wall, the tissue expander is partially filled with saline. Within a few weeks after this surgery, once the patient has healed, expansion can be started as an office procedure.