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Applied Anatomical Study On Technique Of Pedicle Screw Placement In C3,C4 And C5

Posted on:2012-04-28Degree:MasterType:Thesis
Country:ChinaCandidate:Y LvFull Text:PDF
GTID:2154330332499891Subject:Clinical Medicine
Abstract/Summary:PDF Full Text Request
Objective: C3~C5 pedicle anatomy to measure, more in-depth understanding of their anatomy, and provide clinically relevant data to help choose the right pedicle screw.Meanwhile, C3~C5 accurate entry points selected, find the constant reference system into the nail and nail into the direction of measurement and the angle between the selected reference system to determine the most appropriate direction into the screw, as a cervical pedicle screw setinto the guidelines.Methods: Jilin University Department of Anatomy, House, provided a full set of 20 specimens of cervical dried bone (excluding deformities, fractures and pathological destruction of specimens.)Specimens, regardless of gender, age, height, weight and so on.Whichever is C3~C5 60 vertebrae specimens.On both sides of 60 specimens were hand pedicle into snails.Transverse process to take root through the midpoint of a horizontal line through the articular process with the outside vertical edge of the third and foreign, is the intersection of two lines into the screw entrance point.Select the appropriate diameter and length of the screw, along the direction of the axis into the pedicle so that the pedicle screw axis and the axis of overlap (along the horizontal or sagittal pedicle sawn specimens can be seen at the screwIn the pedicle axis.)Remove the screws and Kirschner wires instead of screws inserted in the axis of the screw channel, use the protractor measurement: the screw axis in the horizontal plane and the rear outer side of the isthmus forming the horizontal angle (E angle); screw axis in the sagittal plane andAfter the isthmus formed by the side of the vertical angle (F horn).Using vernier caliper measurements: the narrowest pedicle height (PH); pedicle narrowest width (PW); pedicle screw path length (FSC).Statistical analysis of data using SPSS software.Results:(1) the same segment in the cervical spine, pedicle height greater than the width of the (PH> PW), a difference by t test (P <0.05).(2) the different segments in the cervical, pedicle width (PW) values are similar, the t test C3~C5 pedicle width (PW) no difference (P> 0.05).(3) in the cervical different segments, length of the screw channel (FSC) values are similar, the t test C3~C5 length of the screw channel (FSC) no difference (P> 0.05).(4) C3~C5 horizontal angle (E) were 95.10°±3.96°, 86.60°±3.35°, 84.60°±4.95°; vertical angle (F) were 71.25°±4.54°, 69.90°±5.06°, 76.15°±5.11°.C3~C5 has a decreasing trend of horizontal angle, vertical angle is not found to have increasing or decreasing trend.(5) entry points and over the lower edge of the superior articular process maximum and minimum horizontal distance A C3 is 6.12mm and 1.76mm, C4 for the 4.72mm and 1.58mm, C5 to 6.14mm and 2.16mm; entry points andblock off the back of the vertical side of the sagittal plane from the maximum and minimum value of B and C3 to 5.74mm 2.28mm, C4 for the 4.94mm and 1.66mm, C5 to 5.22mm and 2.12mm, from the data, entry points andfacet and the lateral distance from the lower edge of the block on the back of the vertical distance is not constant, and did not find that there is a pattern.Conclusion: C3~C5 segment pedicle screw fixation hand, the superior articular process of internal and external fate into three equal parts, and for vertical, take-off "isthmus" foreign third of the root of the vertical and transversehorizontal line intersecting the midpoint, the intersection of the entrance point.Taken in the horizontal angle of C3 95.10°±3.96°, vertical angle of 71.25°±4.54°, horizontal angle to take in the C4 86.60°±3.35°, vertical angle of 69.90°±5.06°, horizontal angle to take in the C5 84.60°±4.95°, verticalangle of 76.15°±5.11°.Select a diameter of 3.0mm, a length of 20mm or 22mm screw safety, objective and reliable.
Keywords/Search Tags:Cervical vertebra, pedicle, screw, anatomic
PDF Full Text Request
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