The study aims to compere mandibular splint versus botox injection in lateral pterygoid on cervical muscle activity in patients with temporomandibular disorders
Age from 18-40 years old.
Both sexes.
Duration of the disease is more than 3 months.
Anterior mandibular disc displacement with reduction will be included.
Neurological or musculoskeletal diseases that affect cervical spine other than mandibular disc displacement (eg: cervical spondylosis, spondylolisthesis, and cervical disc injuries)
Bilateral anterior mandibular disc displacement patients.
Musculoskeletal disorders such as severe arthritis, cervical spine surgery or contractures of fixed deformity, leg length discrepancy.
women during pregnancy and lactation.