Associations between vitamin D levels and periodontal attachment loss.

Objectives: Periodontitis is accompanied by attachment loss and alveolar bone resorption. Vitamin D (VD) deficiency was closely associated with bone loss or osteoporosis. The study aims to investigate the potential relationship between different VD levels and severe periodontal attachment loss in American adults.

Association of vitamin K, fibre intake and progression of periodontal attachment loss in American adults.

Background: Periodontitis-related attachment loss is accompanied by mucosal bleeding and inflammatory lesions. Dietary vitamin K and fibre intake are known to be correlation factors of haemostasis and anti-inflammation, respectively.

Objective: To explore the association between severe periodontal attachment loss and vitamin K or fibre intake in American adults.