Role of myofibroblasts in normal and pathological periodontal wound healing.

Myofibroblasts represent specific subpopulations of cells with important roles in tissue remodeling in both health and disease. They are not usually found in resting healthy tissues. However, they increase in number during the proliferative phase of wound healing. In these conditions, myofibroblasts secrete and organize different molecular components of the extracellular matrix that with time will reconstitute and hopefully regenerate the damaged tissue. Importantly, these cell populations must be eliminated after wound healing has been completed. However, deficiencies in their differentiation or the persistence of this cell population has been associated with the development of delayed wound healing and fibrosis, respectively. In the present review, we analyze the involvement of myofibroblasts in periodontal wound healing and their potential contribution to tissue homeostasis and disease.