How to distinguish between black triangle and Mao Mao rain in the correction process

1, gap size and position: black triangle usually has a large gap between teeth, exceeding 0. 5 mm or wider, and as the teeth incline inward, the gingival position of two adjacent teeth contracts inward. Wind and rain in Mao Mao are small gaps, generally less than 0. 5 mm, the position is also different, on one side or upper part of the crown.

2, shape and color: the black triangle gap is large, usually deep into the tooth flesh, you can see the black or dark triangle gap, which has obvious visual impact. The gap between the wind and the rain in Mao Mao is very small, usually light in color and irregular in shape, so it is difficult to be noticed.

3, gum health: the black triangle is often related to gum health. If the gap is large, it will lead to gum inflammation and other problems, which need timely treatment. Wind and Mao Mao rain have relatively little influence on gingival health, and usually do not need special treatment.