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Quantitative Assessment Protocol for Facial Soft Tissue Volumetric Changes with Stereophotogrammetry
Published on: December 9, 2025
[Soft and hard tissue changes in Class II division 1 patients treated with Tip-Edge plus appliance]
Lu-lu Xu1, Li-li Chen, Juan Xu
1Institute of Stomatology, General Hospital of Chinese PLA, Beijing 100853, China.
Objective:
To investigate the soft and hard tissue changes in Class II division 1 patients treated with Tip-Edge plus technique.
Methods:
Sixteen Class II division 1 patients (7 boys and 9 girls) with mandibular retrusion in permanent dentition were selected and treated with Tip-Edge plus appliance. Lateral cephalometric films were analyzed before and after treatment. The effects were evaluated with Holdaway soft tissues analysis and routine cephalometric analysis methods. The arithmetic mean and standard deviation were calculated for each variable. Paired t-test was performed.
Results:
The average treatment time was 16 months. Normal overjet and overbite were established with retroclination of upper incisors and proclination of lower incisors. U1-NA(°) and U1-NA (mm) decreaed by (15.40 ± 5.31)° and (4.16 ± 1.82) mm (P < 0.01). NLA showed an average increase of (-16.60 ± 5.29)° (P < 0.01). Remarkable soft tissue change was noted after the treatment.
Conclusions:
The profile in Class II division 1 patients could be quickly and efficiently improved after treatment with Tip-Edge plus technique.
