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. 2001;25(1):40-2.
doi: 10.1007/s002640000201.

Orientation and tropism of lumbar facet joints in degenerative spondylolisthesis

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Orientation and tropism of lumbar facet joints in degenerative spondylolisthesis

L Y Dai. Int Orthop. 2001.

Abstract

The orientation and tropism of the lumbar facet joints at L4-5 level was assessed by magnetic resonance imaging (MRI) in 53 patients with degenerative L4-5 spondylolisthesis and 53 age- and sex-matched normal control subjects. The degree of disc degeneration at the L4-5 level and of vertebral slip on lateral radiographs was also evaluated. Patients with degenerative spondylolisthesis had more sagittally orientated facet joints (P < 0.01) and more significant facet joint tropism (P < 0.05) than normal control subjects. For patients with degenerative spondylolisthesis, the facet joint tropism was significantly correlated with the degree of disc degeneration (P < 0.05). The results suggest that morphological abnormalities of the lumbar facet joints are a predisposing factor in the development of degenerative spondylolisthesis.

L'orientation et la divergence des facettes articulaires postérieures à l'étage L4-L5 ont été étudiées par IRM chez 53 patients porteurs d'un spondylolisthésis dégénératif et chez 53 patients témoins d'âge et de sexe correspondants. L'atteinte du disque L4-L5 et le glissement vertébral ont aussi été évalués. Chez les patients atteints de spondylolisthésis dégénératif, les facettes sont plus sagittales (P<0.01) et plus divergentes (P<0.05) que dans le groupe témoin et cette divergence est corrélée avec le degré de dégénérescence discale (P<0.05). Ces résultats suggèrent que les anomalies morphologiques des facettes articulaires lombaires prédisposent au développement du spondylolisthésis dégénératif.

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