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Related Experiment Video

Updated: May 27, 2026

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

A simple objective evaluation and grading for facial paralysis outcomes.

¹Otolaryngology, Shimizu Hospital, Nishikyo Kyoto, Japan. kasafuji@aol.com

Acta Oto-Laryngologica

|November 8, 2011

Summary

A new objective measuring box provides easy and accurate assessment of facial paralysis outcomes, including lip shift and eye width changes. This practical tool aids in routine clinical evaluation of facial dysfunction.

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Area of Science:

Reconstructive Surgery
Facial Plastic Surgery
Otolaryngology

Background:

Facial paralysis outcome assessment often relies on subjective visual evaluation.
Objective and quantifiable methods are needed for accurate grading of facial dysfunction.

Purpose of the Study:

Introduce a novel, simple, and objective method for evaluating lip-shift angle and eye-width narrowing after facial paralysis.
Develop a practical tool for routine clinical use in assessing facial synkinesis, contracture, and deviation.

Main Methods:

Utilized a simple measuring box to record lip-shift angle and eye-width narrowing in 30 adult controls and 30 patients with facial paralysis.
Determined standard deviations for lip-shift and eye-width changes in controls.
Assessed patients for synkinesis, contracture, and lip deviation using the measuring box.

Main Results:

Established normative data for lip-shift and eye-width narrowing in healthy individuals.
Proposed a new grading system based on deviations exceeding 2 standard deviations (SDs) or residual lip deviation.
Demonstrated the measuring box's ability to provide simultaneous and objective data.

Conclusions:

A simple measuring box offers an objective and practical method for assessing facial paralysis outcomes.
This technique provides data as easily as visual assessments but with enhanced objectivity.
The method is suitable for routine clinical application in any setting.