Related Experiment Video
Updated: Aug 2, 2026
19:53
Single-stage Dynamic Reanimation of the Smile in Irreversible Facial Paralysis by Free Functional Muscle Transfer
Published on: March 1, 2015
105.8K
Selective Neurectomy with Regenerative Peripheral Nerve Interface Surgery for Facial Synkinesis
Jeffrey T Gu1, Nishant Ganesh Kumar2, Theodore A Kung2
1Division of Facial Plastic and Reconstructive Surgery, Department of Otolaryngology-Head & Neck Surgery, University of Michigan, Ann Arbor, Michigan, USA.
Facial Plastic Surgery & Aesthetic Medicine
|January 30, 2025
Summary
Regenerative peripheral nerve interfaces (RPNIs) with selective neurectomy (SN) surgery may improve facial function. This approach reduced the need for botulinum toxin treatments post-surgery.
Area of Science:
- Neurosurgery
- Facial Plastic Surgery
- Regenerative Medicine
Background:
- Selective neurectomy (SN) for facial synkinesis often results in free-floating nerve endings.
- Regenerative peripheral nerve interfaces (RPNIs) utilize muscle grafts to create a target for nerve reinnervation.
Purpose of the Study:
- To assess the efficacy of RPNI surgery combined with SN in enhancing postoperative facial function.
- To evaluate the impact on botulinum toxin usage and objective facial movement metrics.
Main Methods:
- Retrospective cohort study comparing SN with and without RPNI.
- Analysis of botulinum toxin dosage/frequency and facial movement metrics (margin to reflex distance, brow movement, smile excursion).
Main Results:
- Patients undergoing RPNI surgery required significantly lower botulinum toxin dosages (72.2 vs. 90.3 units).
- RPNI patients experienced longer intervals between botulinum toxin treatments (5.6 vs. 4.6 months).
- No significant differences were found in objective facial movement metrics.
Conclusions:
- RPNI surgery combined with SN appears to improve facial function.
- This improvement is indicated by reduced reliance on postoperative botulinum toxin for managing facial synkinesis.
