After orthodontic treatment in the non-extraction group, the left and right corners of the mouth showed a positive trend, showing outward protrusion (cheilion left (ChL) = 0.42 mm, cheilion right (ChR) = 0.42 mm).
← all excerpts
Three dimensional quantitative study of soft tissue changes in nasolabial folds after orthodontic treatment in female adults.
2
—
—
The sentences
The present study found that no matter whether a tooth was extracted, the NLFs had a negative trend after orthodontic treatment, and it was more obvious in the extraction group than in the non-extraction group, which may be due to the retraction of anterior teeth in the extraction group.