C1:C2 ratio is a potential tool assessing atlas fracture displacement and transverse ligament injury
Conclusions: A C1:C2 ratio >1.10 on plain radiographs showed a sensitivity of 80% in detecting atlas fractures with associated TL injury. All patients with a ratio of ≥1.15 had TL rupture subsequently confirmed by an advanced modality. A ratio calculation on radiographs is a potentially useful method of describing atlas lateral mass displacement.
Level of evidence: Level III
Source: Journal of Craniovertebral Junction and Spine - Category: Orthopaedics Authors: Peny Lin Tim Chung-Hsien Chuang Joseph F Baker Source Type: research
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