The Relationship Between Lumbar Facet Joint Morphology Assessmen And Isthmic Spondylolisthesis

Object:The purpose of this study is to evaluat the correlate of facet joint morphologyparameters with spondylolysis through measurement of related morphological parametersof lumbar vertebral facet joint between spondylolysis group and control group.Materials and Methods:Fifty cases including spondylolysis of L5and normal without lumbar diseasesrespectively were divided into spondylolysis group and control group, who underwentconventional spiral CT volume scanning of lumbar spine. And then thin reconstruction andmultiple planar reconstruction (MPR) were performed. The correlation of relatedmorphological parameters of lumbar vertebral facet joint and spondylolysis was estimatedby the measurements of related morphological parameters of corresponding vertebra facetjoint between the two groups. The chosen of spondylolysis group and control group mustbe observe the following principles:1. Spondylolysis group: the ages between of20-60,spondylolysis of L5,and Exclude spondylolisthesis, lumbar vertebral degeneration, jointsdegeneration, history of spinal trauma, surgery and congenital malformations.2: controlgroup: Age, gender composition ratio the same as case group, all kinds of normal lumbardisease-free.Statistieal analysis:Statistical analysis was performed by using SPSS17.0statistical software.The unpaired t-test was used to compare the measurerment databetween two groups.The Pearson’ s correlation coefficients were used to comparethe association among the parameters.Result:1. Compared with control group(42.34±8.69,1.39±0.17),there were no significantlydifference in the Facet Joints Orientation(FJO)(42.56±8.96) and the Transverse ArticularDimension(TAD)(1.37±0.13) between spondylolysis group and control group(p>0.05).2. Compared with control group(4.20±4.33,0.06±0.06),the Facet Joints Tropism(FJT)(6.96±4.97) and the Transverse Dimensions Tropism(TDT)(0.11±0.09) of spondylolysis group was significantly greater than control group(P<0.01).3. Compared with control group (2.88±0.35,0.68±0.08),The Interfacet Distanee(IFD)(3.30±0.31)and Interfacet Distance Index(ID)(0.76±0.07) of L4in spondylolysis group wassignifieantly greater than in the control group(P<0.01).But no significant difference wasobserved in Vertebral Body Transverse Breadth(BD) and Vertebral Body Height(BH)between spondylolysis group and control group(P>0.05).4. Compared with control group(85.74±2.91),the Pedicle-Facet Angle(PFA)(92.10±3.72) of spondylolysis group was significantly greater than control group(P<0.01).5. Compared with control group(0.615±0.103,0.537±0.101),there were nosignificantly difference in the Isthmic Transverse Breadth(0.616±0.071)and Vertebral PlateThickness (0.569±0.101) between spondylolysis group and control group(p>0.05).6. Therefore there were correlations among these parameters by using the Pearsoncorrelation analysis.Conclusion:1. There were no significantly difference in the Facet Joints Orientation, TransverseArticular Dimension, Vertebral Body Transverse Breadth, Vertebral Body Height, IsthmicTransverse Breadth and Vertebral Plate Thickness between spondylolysis group and controlgroup. there is no necessary relationship between these anatomical structures and thedevelopment of spondylolysis.2-4. The Facet Joints Tropism, Transverse Dimensions Tropism, InterfacetDistanee,Interfacet Distance Idex and Pedicle-Facet Angle in spondylolysis group wassignificantly greater than control group(P<0.01).Anatomical abnormalities among canlead to the occurrence and development of spondylolysis.5. there were correlations among these parameters by using the Pearson correlationanalysis.Spondylolysis may be caused by more abnormal anatomic structure which wereinfluced and interacted mutually.