This study will evaluate, in an adult population (n=448) previously diagnosed with gingivitis and/ or periodontitis, the tooth loss rate and its potential associated factors such as diabetes, smoking, bruxism, cardiovascular diseases, and also the effect of supportive periodontal therapy on these factors, with an up to 50 years of follow-up period.

Significant results of the present study will help in the future reduction of tooth loss among periodontally involved patients.

Inclusion Criteria:

• Age > 20 years.
• Patients diagnosed with generalized chronic periodontitis or gingivitis.
• At least 10 years of follow-up after 1st visit.
• All treatments and recall sessions were done by the same operator at the same specialized dental clinic.

Exclusion Criteria:

• Patients with healthy periodontal status.
• Patients with orofacial anomalies and syndromes.
• Patients receiving periodontal treatments by different operators.
• Patients receiving periodontal treatments at different clinics.
• Patients receiving bisphosphonate therapy.
• Patients receiving chemotherapy or radiotherapy.
• Patients receiving a hormonal therapy.
• Patients with a history of refractory periodontitis or repeated abscess formation.
• Patients with debilitating diseases that could impair the immune system (HIV/AIDS, cancer, or autoimmune diseases).

ID gender

Patients diagnosed with generalized chronic periodontitis or gingivitis.