Photobiomodulation Therapy on Pain and Range of Motion Following Flexor Tendon Repair

Inclusion Criteria: * Forty-four patients of both genders with age ranged between 20 to 50 years will participate in this study. * All patients with zone II and III flexor tendon injuries, will be suffered from pain following flexor tendon repair surgery. * All patients with zone II and III flexor tendon injuries, will be suffered from limitation of range of motion deficiency following flexor tendon repair surgery * All patients enrolled to the study will have their informed consent. Exclusion Criteria: * A wound in the affected area * Rheumatoid arthritis. * Epilepsy or any psychological disorders * Myelopathy or radiculopathy * exposed hand tendons. * Concomitant finger fractures, joint injuries, replantation or revascularizations, extensor tendon injury or crush injuries. * Impairment of cognitive, perceptual or psychological function that would impede ability to follow verbal instruction. * Multiple injuries to one flexor tendon, simultaneous injuries to bone and extensor tendons, skin loss, noncompliant patients or patients under 10 years, and gross contaminations of wounds. * patients with tendon repair associated with a skin graft, nerve injury, arterial injury, systemic disease (e.g. diabetes mellitus), wound infection,