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Progress in Orthodontics
Fig. 6 | Progress in Orthodontics

Fig. 6

From: Stress and movement trend of lower incisors with different IMPA intruded by clear aligner: a three-dimensional finite element analysis

Fig. 6

Stress distribution of lateral incisors with different IMPA during the intrusion by 0.2 mm. The sequence is A (90°), B (95°), C (100°), D (105°), and E (110°). The stress distribution of the lateral incisor was similar to that of the central incisor. I. The von Mises stress distribution of the lateral incisor was similar to that of the central incisor, but the average stress value was larger. II. The minimum principal stress distribution of the lateral incisor was similar to that of the central incisor, the value of compressive stress was smaller, and the distribution on the labial and lingual sides was more symmetrical. III. The minimum principal stress distribution in the PDL of the lateral incisor was concentrated on apex and labial surface, and the average compressive value was larger than that of central incisors

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