To test the effectiveness of a collagen-based treatment for patients complaining of long standing facial nerve axonotmesis, who are following a proprioceptive neuromuscular facilitation protocol (Kabat method), compared to a group only undergoing the Kabat method.
Who can participate
Age range18 Years – 65 Years
SexALL
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Inclusion Criteria:
* patients with a medical diagnosis of long-term unilateral peripheral axonotmesis of the facial nerve
Exclusion Criteria:
* patients with facial palsy caused by central nerve disease;
* patients with a history of recurrent facial palsy;
* patients with a facial skin disease hampering the possibility of injecting the drug; - patients with difficulty in moving their face due to previous plastic surgery or facial surgery;
* patients with systemic diseases that can affect facial electromyography;
* patients deemed inappropriate by the researchers.
* patients with a history of hypersensitivity to any collagen solution constituent or showing pregnancy, lactation, neuromuscular junction disorders (myastenia gravis), peripheral motor neuropathies, or active infections will be also excluded.