[The effect of various orthodontic treatment technics on the gingiva].

Out of a group of 30 patients aged from 11 to 15 years, 10 each were treated with either fixed appliances, or removal plates, or by functional orthodontics. Prior to the beginning of the treatment, and one week and six weeks thereafter, pocket depth, SB index, sulcus fluid flow rate, and OH index were recorded. The inflammatory symptoms of the gingiva were shown to be a function of the OH index. Moreover, the OH index grew worse during orthodontic treatment, especially in the group with fixed appliances.