Degenerative retrolisthesis: is it a compensatory mechanism for sagittal imbalance

Study Design: Retrospective analysis of a prospectively collected patient database. Objective: to investigate the spinopelvic morphology and global sagittal balance of degenerative retrolisthesis, and to determine whether retrolisthesis is a result of spinopelvic morphology or a compensatory mechanism of global sagittal balance. Summary of Background Data: We investigated the spinopelvic morphology and global sagittal balance of patients with a degenerative retrolisthesis or anterolisthesis. A total of 269 consecutive patients with a degenerative spondylolisthesis were included in this study. There were 95 men and 174 women with a mean age of 64.3 years (SD 10.5; 40 to 88). A total of 106 patients had a pure retrolisthesis(R group), 130 had a pure anterolisthesis (A group), and 33 had both (R+A group). Results: A backward slip was found in the upper lumbar levels (mostly L2 or L3) with an almost equal gender distribution in both the R and R+A groups. The pelvic incidence and sacral slope of the R group were significantly lower than those of the A (both p < 0.001) and R+A groups (both p < 0.001). The lumbar lordosis of the R+A group was significantly greater than that of the R (p = 0.025) and A groups (p = 0.014). The C7 plumb line of the R group was located more posteriorly than that of the A group (p = 0.023), but was no different from than that of the R+A group (p = 0.422). The location of C7 plumb line did not differ between the three groups (p = 0.068). The spinosacral angle of the R group was significantly smaller than that of the A group (p < 0.001) and R+A group (p < 0.001). Conclusions: Our findings imply that there are two types of degenerative retrolisthesis: one occurs primarily as a result of degeneration in patients with low pelvic incidence, and the other occurs secondarily as a compensatory mechanism in patients with an anterolisthesis and high pelvic incidence.

Author dc:creator

• 김, 제중

Contributors dc:contributor

• 전, 창훈
• 대학원 의학과
• 107716

• spinopelvic morpgology
• sagittal balance
• degerative retrolistesis
• anterolisthess
• pelvic incidience
• 척주골반 형태
• 시상균형
• 척추 후방전위증
• 척추 전방전위증
• 골반 입사각

Language dc:language

en

Identifier

http://dcoll.ajou.ac.kr:9080/dcollection/jsp/common/DcLoOrgPer.jsp?sItemId=000000019034
000000019034

OAI identifier oai:identifier

oai:repository.ajou.ac.kr:201003/11850