1.Results The serum level of CA199 and CEA of the patients pre-operation were higher than of normalvolunteer (P<0. 01), and they decreased abruptly after operation.
2.Methods:20DLJD patients and 39healthy volunteer with normal occlusion were sele cted as patient and control group respectively. Roentgenograms of cephalometric and cervical spine in posterior -anterior position and in nature head lateral position and a lso body photos were taken.
