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The Use of T1 Sagittal Angle in Predicting Cervical Disc Degeneration

Authors
 Bong-Seok Yang  ;  Su-Keon Lee  ;  Kyung-Sub Song  ;  Sang-Pil Yoon  ;  Geun Jang  ;  Chae-Chul Lee  ;  Seong-Hwan Moon  ;  Hwan-Mo Lee  ;  Seung-Hwan Lee 
Citation
 Asian Spine Journal, Vol.9(5) : 757-761, 2015 
Journal Title
 Asian Spine Journal 
ISSN
 1976-1902 
Issue Date
2015
Abstract
STUDY DESIGN: Retrospective evaluation. PURPOSE: To analyze the effect of T1 slope on degree of degeneration in patients with cervical disc degeneration. OVERVIEW OF LITERATURE: The T1 slope is well known parameter that may be very useful in evaluating sagittal balance. There are no reports on the analysis of the relationship between T1 slope and cervical disc degeneration. We hypothesized that T1 slope has an effect on the degree of cervical degeneration. METHODS: Sixty patients who had cervical spine magnetic resonance imaging (MRI) in our orthopedic clinic were enrolled. Patients were divided into two groups according to T1 slope. Radiologic parameters obtained from radiography and cervical spine MRI were compared between low T1 slope group (≤25) and high T1 slope group (>25). RESULTS: Among low T1 slope group, average degeneration grade of each cervical segment was 2.65 in C2-3, 2.50 in C3-4, 2.62 in C4-5, 3.23 in C5-6, and 2.81 in C6-7. And that of high T1 group was 2.35 in C2-3, 2.32 in C3-4, 2.59 in C4-5, 2.79 in C5-6, and 2.32 in C6-7. Grade of degeneration of low T1 group was significantly higher, as compared with high T1 group in C5-6 (p=0.028) and C6-7 (p=0.009). Percentage of high grade degeneration of more than grand III was 65.4% in low T1 group and 32.4% in high T1 group (p=0.018). Risk of high grade degeneration of C6-7 was significantly higher in low T1 group (odds ratio, 5.63; 95% confidence interval, 1.665-19.057; p=0.005). CONCLUSIONS: Patients with low T1 slope had higher grade of degeneration regardless of age and gender. Low T1 slope is a potential risk factor of cervical spondylosis especially in the C6-7 cervical segment.
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/141714
DOI
10.4184/asj.2015.9.5.757
Appears in Collections:
1. Journal Papers (연구논문) > 1. College of Medicine (의과대학) > Dept. of Orthopedic Surgery (정형외과학교실)
Yonsei Authors
문성환(Moon, Seong Hwan) ; 이환모(Lee, Hwan Mo)
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