Title Page
Contents
ABSTRACT 9
Ⅰ. INTRODUCTION 11
Ⅱ. MATERIALS AND METHODS 12
1. Study Population 12
2. Surgical Procedure 13
3. Radiologic Evaluation 13
4. Statistical Analysis 15
Ⅲ. RESULTS 16
1. Demographic Parameters 16
2. Clinical Outcomes 18
3. Radiographic Outcomes 20
Ⅳ. DISCUSSION 27
Ⅴ. CONCLUSION 30
REFERENCES 31
ABSTRACT(Korean) 36
Table 1. Characteristics of patients who developed DJK* after surgery 17
Table 2. Demographics of the DJK* and non-DJK groups 17
Table 3. Clinical outcomes for each period in both groups 19
Table 4. Comparison of radiologic parameters between the DJK and non-DJK groups 21
Table 5. Differences in cervical parameters before and after surgery 24
Table 6. Differences in cervical parameters immediately postoperatively and at the final follow-up 24
Table 7. Multivariable stepwise logistic regression analysis results for factors influencing DJK after posterior cervical spinal fusion surgery. 26
Figure 1. Standard lateral cervical X-ray before and immediately after surgery Standard lateral cervical X-ray before (A) and immediately after surgery (B).... 14
Figure 2. T1 slope, cervical lordosis, segmental lordosis and sagittal vertical axis values preoperatively, postoperatively, and at the final follow-up. Final... 22
Figure 3. CL, SL, T1 slope increased and C2–7 SVA decreased immediately but eventually returned to preoperative values (A). Changes to T1 slope, CL,... 23
Figure 4. Algorithm of DJK development. DJK: distal junctional kyphosis, T1s: T1 slope, CL: cervical lordosis (C2–7), SL: segmental lordosis of operation,... 25