Soft Tissue Dynamics in Orthodontic Treatment
Summary
Orthodontic interventions exert controlled forces on teeth and supporting bone, yet it is the response of the overlying soft tissues that ultimately shapes facial aesthetics and function. Soft tissue dynamics encompass changes in lip position, thickness and curvature, as well as alterations around the chin and nasolabial region. Advances in three-dimensional imaging and computational modelling have revealed how incisor retraction, premolar extractions and arch expansion translate into measurable shifts in soft tissue landmarks. Patient-specific factors—including baseline tissue thickness, skeletal pattern, age and sex—influence the degree and direction of tissue adaptation. A comprehensive understanding of these interactions enables clinicians to forecast facial profile changes more accurately, to personalise biomechanical strategies and to achieve harmonious outcomes that resonate across diverse populations.
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Soft Tissue Dynamics in Orthodontic Treatment publication trend
The graph below shows the total number of articles in soft tissue dynamics in orthodontic treatment across all publications each year (not limited to Nature Index journals).
Technical terms
Cone-beam computed tomography (CBCT): A three-dimensional radiographic technique providing volume data for precise measurement of hard and soft tissue structures.
Geometric morphometric analysis: A statistical shape analysis method that quantifies morphological variation using Cartesian coordinates of anatomical landmarks.
Soft tissue point A/B: The most anterior point of the upper/lower soft tissue overlying the respective skeletal landmark, used to assess anteroposterior facial changes.
SAL (Upper lip curvature): A novel angle measurement between subnasale, labrale superius and a constructed reference line to quantify upper lip profile convexity.
PBL (Lower lip curvature): A corresponding angle measurement for the lower lip, defined by labrale inferius, soft tissue pogonion and a reference line to assess lower lip contour.
References
- Three-Dimensional Digital Image Analysis of Skeletal and Soft Tissue Points A and B after Orthodontic Treatment with Premolar Extraction in Bimaxillary Protrusive Patients. Biology (2022).
- Hard and soft tissue shape variation and changes in Class II division 1 malocclusion during orthodontic treatment: a geometric morphometric analysis. BMC Oral Health (2023).
- Change of Lip Curvature Through Extraction and Non-Extraction Orthodontic Treatment. Applied Sciences (2024).
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