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Selective Neurectomy with Regenerative Peripheral Nerve Interface Surgery for Facial Synkinesis.

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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.

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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.