Center for Temporomandibular Disorders, Peking University School of Stomatology, Beijing 100081, China;
Center for Temporomandibular Disorders, Peking University School of Stomatology, Beijing 100081, China;
Laboratory of Molecular Biology, Beijing Jishuitan Hospital, Beijing 100083, China;
Laboratory of Oral and Maxillofacial Surgery, Peking University School of Stomatology, Beijing 100081, China;
Center for Temporomandibular Disorders, Peking University School of Stomatology, Beijing 100081, China;
estradiol; cartilage; condyle;