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Updated: Jun 8, 2026
Quantitative Assessment Protocol for Facial Soft Tissue Volumetric Changes with Stereophotogrammetry
Published on: December 9, 2025
[The soft tissue change of Angle's Class II division 1 malocclusion patients with vertical growth pattern after tooth
Ming-Hui Peng1, Qiu-ju Meng, Lei-chang Wang
1Shanghai Luwan Dental Clinic, Shanghai 200023, China.
Objective:
This study is to evaluate the soft tissue change of Angle's Class II division 1 malocclusion patients with vertical growth pattern after tooth extraction orthodontic treatment, and to provide experimental results to help to make orthodontic treatment plan and treatments.
Methods:
38 Angle's Class II division 1 malocclusion patients with vertical growth pattern and with tooth extraction orthodontic treatment were included in this study. The pre- and post-treatment cephalometric X-rays were made and 26 measurement items were measured. The change value of pre- and post-treatment, youngsters and adults were compared.
Results:
TUL-EP, TLL-EP, upper and lower lip position, Stoms-Stomi, U1-Ptm were reduced after treatment. Upper lip sulcus and flange thickness, upper and lower lip length, upper and lower lip inclination angle, nasolabial angle, Z angle, mentolabial sulcus inclination angle were enlarged after treatment. The upper lip sulcus thickness, lower lip length and A'-Ptm of adolescent were enlarged, but adult were on the contrary. The change of upper lip length, mentolabial sulcus inclination angle and U1-Ptm between adolescent and adult was statistically different.
Conclusion:
The best treatment period of patients with Angle's Class II division 1 malocculsion with vertical growth pattern was in the rapid growth and development period of adolescent.
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