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Single-stage Dynamic Reanimation of the Smile in Irreversible Facial Paralysis by Free Functional Muscle Transfer

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Published on: March 1, 2015

Dynamic smile evaluation in different skeletal patterns.

Noshi Siddiqui, Pradeep Tandon, Alka Singh

The Angle Orthodontist

|May 17, 2016

Summary

This summary is machine-generated.

Skeletal patterns significantly influence dynamic smile characteristics. Increased incisal display during smiling is primarily linked to upper lip elevation, not solely vertical skeletal or dental factors.

Keywords:

Dynamic smile Skeletal pattern Vertical dimension

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Systematic Assessment of Mammalian Skull Specimens for Dental and Temporomandibular Joint Pathology

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Published on: August 22, 2022

Area of Science:

Dentistry
Orthodontics
Facial Aesthetics

Background:

Skeletal patterns significantly influence facial morphology and smile aesthetics.
Understanding the relationship between skeletal patterns and dynamic smile parameters is crucial for orthodontic and aesthetic treatments.

Purpose of the Study:

To evaluate dynamic smile characteristics across different skeletal patterns (horizontal, average, vertical).
To correlate vertical smile parameters with underlying skeletal and dental factors.

Main Methods:

150 participants (16-25 years) were categorized into horizontal, average, or vertical skeletal patterns using cephalometric measurements (SN-MP, FMA, Jarabak ratio).
Videographic smile analysis included measurements of upper lip length, maxillary incisal display, interlabial gap, intercommisural width, change in upper lip length, and smile arc.
Statistical analyses included two-way ANOVA, post hoc tests, chi-square tests, and correlation analyses.

Main Results:

Vertical skeletal patterns showed significantly increased upper lip length, maxillary incisal display, and interlabial gap compared to horizontal patterns.
Intercommisural width was significantly decreased in the vertical pattern. Flat smile arcs were more common in the horizontal pattern.
Positive correlations were observed between N-Me, U1-PP, and change in upper lip length with vertical smile parameters.

Conclusions:

Distinct skeletal patterns are associated with characteristic dynamic smile features.
Upper lip length does not solely account for increased incisal display during smiling.
Increased incisal display during smiling is more strongly associated with upper lip elevation than with vertical skeletal and dental factors.