Temporomandibular joint disorders (TMDs) range from gross anatomic deformities of the disc and hard tissue to functional disturbances. Traditional treatment of TMDs includes physical therapy, use of appliances, pharmacological, surgical and psychological interventions. However, during the late stage of TMDs, conventional management often results in inadequate relief of symptoms. Stem cell-based tissue regeneration has been studied extensively in joint regeneration, including the Temporomandibular Joint (TMJ). This study aims to review the potential of various human stem cells (HSC) for the regeneration of the TMJ. In vitro studies using human mesenchymal stem cells cultured under different conditions to evaluate regeneration of TMJ related structures were searched on PubMed, EMBASE, Cochrane, and Web of Science up to March 2020. In vitro studies utilized several different types of stem cells under varying conditions. Increased osteogenesis and/ or chondrogenesis were noted with stem cell interventions compared to control groups on Alkaline Phosphatase (ALP) activity, Col-I, Col-II, Col-X, RUNX2, LPL, and Aggrecan mRNA expression. This review emphasizes the potential of stem cell therapies in the regeneration of TMJ-related structures. However, further in vivo studies are required to evaluate the efficacy and safety of these therapies in humans. K E Y W O R D S in vitro, mesenchymal stem cells, review, stem cell therapies, temporomandibular disorders, temporomandibular joint 1 | INTRODUCTION The temporomandibular joint (TMJ) is a complex synovial joint with a unique articulation between the temporal glenoid fossa and the mandibular condyle, which are separated by an articular disc composed of avascular and non-innervated dense fibrous connective tissue with a varying amount of fibrocartilage. The articular disc divides the TMJ cavity into upper and lower chambers. Gliding movement occurs in the upper chamber during the maximal mouth opening, while the lower chamber function primarily as a hinge or rotary movement in the early opening. Because the TMJ has a hinge and sliding movable socket, it is classified as ginglymoarthrodial a joint. The TMJ is surrounded by a fibrous connective tissue capsule attached to muscles and tendons. The capsule is lined by a synovium This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.