Denis classification is used to asses -
Stability of spine
Degree of calcium content
Degree of tumor invasion
Amount of femur head subluxation in dysplastic hips
Ans. is 'a' i.e., Stability of spine Denis Classification for Spinal stability:* In assessing spinal stability, three structural elementsmust be considered:i) The posterior osseoligamentouscomplex (or posterior column) consisting of thepedicles, facet joints, posterior bony arch, interspinousand supraspinous ligaments;ii) The middle column comprising the posterior half of the vertebralbody, the posterior part of the intervertebral disc andthe posterior longitudinal ligament; andiii) The anteriorcolumn composed of the anterior half of the vertebralbody, the anterior part of the intervertebral disc andthe anterior longitudinal ligament.* Allfractures involving the middle column and at least oneother column should be regarded as unstable.* Fortunately,only 10 per cent of spinal fractures are unstableand less than 5 per cent are associated with corddamage.
Spinal Injuries