Different Laser Frequencies on Neuropathic Outcomes in Patients With Bell's Palsy

Summary

this study was done to compare different laser frequencies on neuropathic outcomes in patients with Bell's palsy.

Conditions

• Neuropathy, Facial
• Bell Palsy
• Laser

Interventions

DEVICE

sham laser therapy

the laser irradiation will be deactivated in the sham laser device by its manufacturer, but its visual light and acoustic functions maintained. The output power of the sham laser's infrared light will be zero mW, will be applied over the eight points over the face

DEVICE

Low-Level Laser Therapy

Low-Level Laser Therapy (LLLT) for 5 min over eight points over the face, with the laser probe in direct contact with the superficial roots of the facial nerve. The parameters will be used wavelength of 830 nano meter, frequency of 1 kilohertz, the duty cycle of 80%, and energy density of 10 J/cm'. During each session, the total energy will be delivered to the patient are 80 Jole.

DEVICE

gallium arsenide diode laser (BTL-5000 laser)

gallium arsenide diode laser (BTL-5000 laser) will be used with infrared probes of 830 nm wavelength and 100 mW output power, average energy density of 10 J/em?, a frequency of 1 kilohertz, and a duty cycle of 80 %. In all cases, the laser will be in direct contact with the superficial roots of the facial nerve on the affected side and will be applied for 2 min and 5 s per point for 8 points with a total energy of 80 J

DEVICE

high intensity laser treatment

High intensity laser therapy treatment with pulsed neodymium doped: yttrium aluminum garnet laser. The apparatus provided the following options: pulsed emission (1,064 nm), very high peak powers (3 kW), high levels of fluency (energy density) (810-1,780 mJ/cm), brief duration (120-150 Ms), low frequency (10-40 Hertz), and a duty cycle of approximately 0.1 %. High intensity laser therapy will be applied with contact and perpendicular to the superficial roots of the facial nerve of the affected side. The time of application will be 7 s/per point with an energy density of 10 J/em'. The total energy delivered to the patient during one session will be 80 joules. The device calculates the number of pulses, energy received for each session, and the total energy delivered to the patient during the treatment session

OTHER

Exercises

Patients in all treatment groups received massage to the facial muscles and facial exercises. The facial exercises may include different facial expressions in front of mirror, applying a resistance to the sound side to reinforce the weakened side. A resisted exercise to the neck muscles was performed in all direction to encourage the movement of the facial muscles as neuromuscular facilitation exercises for facial muscles

Sponsors & Collaborators

• Kafrelsheikh University

  lead OTHER

Study Design

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

SINGLE

Model

PARALLEL

Eligibility

Min Age

18 Years

Sex

ALL

Healthy Volunteers

No

Timeline & Regulatory

Start

2025-12-01

Primary Completion

2026-05-01

Completion

2026-06-15

Countries

• Saudi Arabia

Study Locations