Tianjin University of Traditional Chinese Medicine Tianjin China;
Tianjin University of Traditional Chinese Medicine Tianjin China;
Tianjin University of Traditional Chinese Medicine Tianjin China;
Tianjin University of Traditional Chinese Medicine Tianjin China;
Stomatological Hospital Tianjin Medical University Tianjin China;
Chronic periodontitis; Oral health; Self-management; Surveys and questionnaires;