Abstract:

Objective
 To compare the difference between the measurement results of  the  cervical  pedicle specimens  and CT image，and provide the basis for clinical cervical screw internal fixation operation. Methods Twenty-seven Chinese adult cadaver cervical specimens including C3 to C7 vertebrae were measured by a digital calipers and  CT image，containing pedicle height（PH,PH′）,pedicle width(PW,PW′),total pedicle length(TL,TL′)and two pedicle lengths（PL1,PL2;PL1′，PL2′）.The results of specimens and  CT images were compared. Results Different cervical vertebra in the same side of specimens or CT images,PW(PW′):C3,C4＜C5，C6（P<0.05)，C5，C6＜C7（P<0.01) ； PH(PH′):there were no significant differences；TL,PL1，PL2 (TL′，PL1′,PL2′):there were no marked differences.In the same cervical vertebra of the specimens or CT images,PW(PW′)＜PH(PH′) (P<0.01﹚，PL1(PL1′)＜PL2(PL2′) (P<0.01).Conclusion The results of measurement by CT images are not markedly different from that of specimens. CT image measurement is available before cervical screw internal fixation operation.

Key words: cervical vertebrae;pedicle;anatomy；radiology