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Age, cervical sagittal imbalance cited as risk factors for kyphotic deformity after laminoplasty
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Recently published data indicated advanced age and cervical sagittal imbalance were preoperative risk factors for kyphotic deformity after laminoplasty for cervical spondylotic myelopathy in patients without preoperative cervical kyphotic alignment.
Researchers included 174 consecutive patients who received a double-door laminoplasty (LAMP) for cervical spondylotic myelopathy (CSM) without preoperative kyphotic alignment in a retrospective study. Preoperative cervical lateral radiograph images in the standing position were measured and reassessed during a 1-year follow-up visit.
A LAMP was performed at C2-6 in one patient, at C2-7 in four patients, at C3-6 in 66 patients and at C3-7 in 103 patients, the researchers reported. Nine patients exhibited postoperative kyphotic deformity. Researchers compared the preoperative factors between the kyphotic deformity group (nine patients) and the kyphotic deformity group (165 patients).
“Although the preoperative [Japanese Orthopaedic Association score system for cervical myelopathy] C-JOA scores were not significantly different between the two groups, the postoperative C-JOA scores (P < 0.01) and the recovery rates of the C-JOA scores (P < 0.01) at the 1-year follow-up period in the kyphotic deformity (+) group were inferior to those of the kyphotic deformity (–) group,” researchers wrote in the study.
Using a stepwise logistic regression, researchers found advanced age and cervical sagittal imbalance were risk factors for postoperative kyphotic deformity following LAMP. – by Robert Linnehan
Disclosure: The researchers report no relevant financial disclosures.
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