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Fig. 1 | Journal of Orthopaedic Surgery and Research

Fig. 1

From: Intraarticular bone grafting in atlantoaxial facet joints via a posterior approach: nonstructural or structural—a minimum 24-month follow-up

Fig. 1

An atlantoaxial dislocation without BI managed with posterior nonstructural fusion. Female, 40 years. She sustained myelopathy (JOA score 11) due to atlantoaxial dislocation for 6 months and underwent atlantoaxial facet release, C1-2 fixation, reduction, and intraarticular nonstructural fusion via a posterior approach. At the final follow-up, her JOA score was 16. A–C Preoperative CT slice: right atlantoaxial facet joint (1A), midsagittal (1B, white line indicates Mcrea’s line), and left atlantoaxial facet joint (1C) views showed the relationship of C1 to C2, and there was no BI. DF Immediate postoperative sagittal CT slice: nonstructural grafts (white arrow) within the atlantoaxial facet joints. The height of the joint space was 1.5 mm on the right side (1D) and 1.8 mm on the left side (1F). Midsagittal CT (1E) showed anatomical reduction of the dislocation. GI CT slice at 6 months following surgery: grafts bridged the neighboring facet joints (white arrow) and suggested successful fusion. The height of the joint space was maintained well (1.2 mm on the right side, 1G; 1.5 mm on the left side, 1I). The reduction was maintained well (IH)

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