To clarify the role of mechanical factors in the pathogenesis of the ossification of the posterior longitudinal ligament (OPLL), we investigated the cervical posture of 32 patients with OPLL and 18 patients with cervical spondylotic myelopathy (CSM) in their daily life.
All patients were examined directly in our hospital.
Patients with OPLL maintained their carvical spine in the anterior flexed position significantly longer than patients with CSM.
We concluded that mechanical factors are important aspects in the pathogenesis of OPLL.
