牙周病为一种世界性疾病,是成人失牙的主要原因。大量证据表明,细菌及其产物是龈炎和牙周炎的主要病原因子。由于近年来厌氧菌培养技术的进步,发现了许多以 Periodontal disease is a worldwide disease, is the main reason for adult tooth loss. There is ample evidence that bacteria and their products are the major causative agents of gingivitis and periodontitis. Due to the progress of anaerobic culture in recent years, many have been found