Cosnparative Study Between Transpedicular Sc:revvs IFixadon \Vith Bony Fusion and Posterior Lumbar •J1tterbody Fusion Using Cages ln•Lumbar Spondylolisthesis

Abstract

Tile tcrn1 spondylolistilcsis was derived from the Greek roots spomlylos, meaning a vertebra and olisthy, meaning to slip. It is defined as tile forward displacement of om; vertebral hody llll another, that fn.:quently occurs in the lumbosacral region, it occurs in 5% of the adult population (Kilian, n854)o

Tile most widely recognized classification syst.em subdivides spondylolisthesis into isthmic, degenerative, dysplastic, traumatic and pathologic type in addition to the postsurgical type (Wiltse ct al., n 976).

Most cases with spondylolisthesis arc asymptomatic. Although, the various types of spondylolisthesis differ as regard to. cause age, sex and pathology, several clinical presentations arc common to all types including back pain, radicular pain, deformity in the form of palpable step, kyphosis or scoliosis and gait disturbances (McPhee1 199m.

Plain radiographs anteroposterior, lateral, dynamic and oblique views lumbosacral spine are excellent initial step in the evaluation of displacetnents. Traction-compression is more accurate for selecting the changes in the slip. In addition to myelography, computed tomography and magnetic resonance (Ciucker and Rothnnan, 1985).

Radiological assessment of cases includes the amount of slip, slip a11 le and lumbar index is import<•.nt for