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Objective: It has been reported that the incidence of cervical disease in Chinese adults is about 4% to about 16%. The cross section of the cervical form, we will be the direction of bilateral facet called facet joints and the angle formed by the vertical line of the maximum diameter of the cervical vertebrae, that small joint angle. In this study, by the direction of the facet joint angle of 130 adult patients with cervical bilateral joint measurement research to understand the characteristics of normal adult cervical neck to neck 7 species distribution of the facet joints and the degree of variation, and to further explore the angle of cervical spondylosis between the clinical relationship. METHODS: The sample number of cases to 130 cases, selected samples were from the Third Hospital of Hebei Medical Spine Surgery clinical cases. Choose outpatient treatment 30 patients, selected requirements for only a neck, a slight discomfort, no significant pain and numbness in limbs, signs and symptoms and pathological signs except by the clinical and radiographic examination after clear cervical congenital malformations, neck cancer , tuberculosis, fractures, lesions in patients with cervical spondylosis as normal adult group, including 12 males and 18 females, aged 22 to 53 years old, with an average age of 39.7 years. Select outpatient or inpatient cases 100 cases, the inclusion criteria were confirmed by cervical MRI examination and a detailed physical examination and clinical signs and symptoms and diagnosis of patients with cervical, except for cervical cancer, tuberculosis, fractures, and other neck disorders, which we call cases research group, including 71 male and 29 female. Age 32 to 70 years old, with an average age of 52.6 years. Involvement gap including: neck 3,4 segment 13 cases, neck 4,5 segment 58 cases, neck 5,6 segment 75 cases of carotid 6,7 segment 13 cases, which involved 54 cases of a single segment, double The segments involved 33 patients, three stages and involved 13 cases. Scanning methods take various segments of the lower vertebral endplate plane parallel with the normal adult group, the cross-section of the MRI scan gap neck 2 to C7. The first measurement of the secondary measurement will record images entered into the computer, the application of image measurement software to measure the point of view of both sides of all cervical facet joints in MRI-chip measurement tool. Finally, using the SPSS statistical package for statistical analysis of measured data. The results: 1, for the detection of subjective error detection, the main source of error is found to determine the small joints of the upper and lower boundary, but the linear correlation coefficient test results show that both have a strong correlation to determine the boundaries of the vertebral maximum transverse diameter and image. The above results show that the measuring method used in this study has a high repeatability and reliability. 2, normal adult group bilateral cervical facet joints side do small joint angle: segmental cervical plane measurements found that the left and right sides of a small joint angle of the same, but in the left and right sides of the same level The results showed no significant side other advantages. T-test results of the the bilateral joint angle of the same segment in the cervical segment level: the mutual bilateral joint angle comparison results showed that no significant difference in sexual significance (P gt; 0.05). But in normal subjects, the average degree of asymmetry in the bilateral facet angle of about 17.2% in the neck 4,5 segment is particularly evident around in about 32%. Prompted the size of the normal cervical facet joint angle without significantly at different levels of the left and right side of the other advantages. The small joints of the cervical segments angle: compare the different segments of the cervical facet joint angle to each other, found significant angle differences of each segment. Neck 2,3 section, the angle of the cervical facet angle in between 54 to 85 °, i.e. personally and sagittal angle outward angled backward. At the carotid 3,4 level, small the angle of the joint angle in the range of 72 ~ 110 °. Neck 4,5 angle between 78 ~ 117 °, the angle of the neck 5,6 between 86 ~ 120 ° from 3,4 neck to the neck 5,6 segment transition process, small joint angle The gradual increase in the angle of the angle of the horizontal direction, and gradually from posterolateral angled steering or steering angle horizontally forward, that increasingly move outside into a corner. But in carotid 6,7 section, the angle is between 83 ~ 105 °, i.e. to the neck 6,7 vertebral later, due to the gradual shift behavior thoracic, the angle of the joint angle is gradually reduced, was close to the horizontal direction, i.e. small joint angle of the direction of the front outside of gradually reversed coronal adapt to each other, with the small joints of the thoracic spine angle. The transition segment in the neck 4 to 7, the angle of the cervical joint angle changes thought two forms based, whereby the cervical joint angle change is divided into a gradient-type and mutant. 3 clinical relationship of cervical facet joint angle and cervical disease in patients with cervical spondylosis, angle side of the small joints of the diseased segments are within the normal range, while the other side can or not within the normal range. T test results showed no significant correlation asymmetric bilateral facet angle of incidence of cervical spondylosis cervical disease is not a single cervical facet asymmetry caused, which can be considered in all segments of the cervical. Neck the 4,5 and neck 5,6 segment, due to the small joints of the pathological segment angle asymmetry chance than other segments, this segment is also the site of cervical disease involvement may also be considered certain facet asymmetry and cervical disease occurrence. Conclusion: In the normal adult cervical segment joints sudden emergence of joint angle characteristics are not the same. The connection of the upper cervical spine and skull determines the direction of the the adjacent cervical facet angle. The complex movement of flexion and extension of the cervical spine in different directions, rotation, Orbit determine the characteristics of this part of the cervical facet joint angle. Cervical and thoracic the transitional connect decided cervical facet joint angle angle characteristics. Found in the control group of patients with cervical segment joint angle of lesions occur in the normal range, but the the obvious asymmetry corner by the small joints of the same level more easily induced neck disorders in the neck 6 segment is particularly evident. In short, the facet joints is one of the important structures of the spinal column, and plays an important role in maintaining the stability of the spine and activities, the morphology of the cervical articular angle is determined by a special movement characteristics of the cervical spine, small joints angle direction, there is a certain significance in the pathogenesis of cervical spondylosis.
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