Representative photomicrographs of periodontal tissue regeneration. The mock-PDLCs + BME-10X group, the hOPG-PDLCs + BME-10X group, and the PDLCs + BME-10X group showed more newly formed alveolar bone, periodontium and new cementum-like tissue. a hOPG-PDLCs + BME-10X, b mock-PDLCs + BME-10X, c PDLCs + BME-10X, and d BME-10X