[Effect of masticatory load on oxygen tension in periodontal tissues]

Relationship between the effect of occlusional loading (weak, 10-15 H, and strong, 120-150 H) and oxygen tension (pO2) in periodontal tissues adjacent to the first molar on the working and resting sides was carried out in 57 subjects with different clinical status of the periodontium and with partial secondary adentia. pO2 decreased during exercise, the most pronounced drop (to 12 mm Hg) being observed during intensive exercise. The level of pO2 decreased greater on the resting side and in patients with periodontal diseases. The longest period of pO2 recovery (up to 50 min) was observed after intensive exercise.