Related Experiment Video
Updated: May 24, 2026
Measuring Maxillary Posterior Tooth Movement: A Model Assessment using Palatal and Dental Superimposition
Published on: February 23, 2024
[Occlusal contacts during protrusion and lateral movements after orthodontic treatment]
Weiwei An1, Bangkang Wang, Yuxing Bai
1Dept. of Orthodontics, School of Stomatology, Capitol Medical University, Beijing 100050, China.
Objective:
To observe the occlusal contacts during protrusion and lateral movements in adolescent patients after orthodontic treatment.
Methods:
Sixteen adolescent patients who achieved normal dentition after orthodontic treatment were selected as experimental group and 17 healthy adolescents and young adults with normal occlusion were selected as control group. The occlusal contacts during protrusion and lateral movements in the two groups were recorded with T-Scan II system and compared.
Results:
The prevalence of occlusal interferences in the posterior segment in the experimental group was high and most of them were on the second molars. The value of disclusion time during left lateral movements, right lateral movements and protrusion in the experimental group were (1.504 +/- 0.681), (1.532 +/- 0.913), (1.358 +/- 0.791) s. The value of disclusion time during left lateral movements, right lateral movements and protrusion in the control group were (0.470 +/- 0.059), (0.483 +/- 0.045), (0.482 +/- 0.047) s. The results in the experimental group were significantly longer than those of control group (P < 0.01).
Conclusion:
Although the patients achieved normal dentition after orthodontic treatment, their disclusion time were longer than those in healthy adolescents and young adults with normal occlusion.
Related Concept Videos
01:15Teeth
In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin and...
01:21Tooth Anatomy
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or grinding food.
01:26Assessment of the Mouth
Mouth Inspection
The inspection begins with visually examining the mouth for symmetry, color, and size.
01:11Oral Cavity
Teeth: The teeth are the hardest structures in our bodies. Humans have two sets of teeth throughout their lifetime: deciduous (baby) teeth and permanent teeth. Each tooth consists of several parts: the crown (visible part), the root (embedded in the jaw), enamel (hard outer...