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Fig. 1 | BMC Musculoskeletal Disorders

Fig. 1

From: Association between anterior bone loss and anterior heterotopic ossification in hybrid surgery

Fig. 1

A 51-year-old woman who underwent contiguous 2-level hybrid surgery at C4-C6. b and c Preoperative dynamic radiographs show that a loss of intervertebral disc height and decrease of segmental mobility occurred at C5–6. Thus, fusion was performed at C5–6 and cervical disc arthroplasty was performed at C4–5. e and f The immediate and 6-month postoperative lateral radiographs show the peri-prosthesis bone loss was found at the replacement level. e, f, g, and h The measurement method for the degree between the prosthesis position and posterior vertebral line. The postoperative lateral radiographs obtained at 1 week, 6 months, 12 months, and 55 months after surgery show the progression of implant subsidence

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