The prevalence of proximal and distal junctional kyphosis following isola instrumentation and arthrodesis for adolescent idiopathic scoliosis

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dc.contributor.author Hollenbeck, Steven
dc.date.accessioned 2006-06-30T20:08:26Z
dc.date.available 2006-06-30T20:08:26Z
dc.date.issued 2006-06-30T20:08:26Z
dc.identifier.uri http://hdl.handle.net/2271/147
dc.description Musculoskeletal Room G027 Dykes 10:36 AM Abstract 203 en
dc.description.abstract Junctional kyphosis may be a common finding in patients that undergo spinal instrumentation and fusion since there is an abrupt transition between fixed and mobile spinal segments. This excess motion may occur at either the proximal or distal end of the fixed spine. Previous studies have documented that the prevalence of proximal junctional kyphosis (PJK), at a minimum of two years after posterior instrumentation and arthrodesis on adolescent idiopathic scoliosis patients, is 27% and 26% when looking at scoliosis of mixed pathology in adulthood. Studies looking at distal junctional kyphosis (DJK) have reported 14% prevalence in posterior instrumentation and arthrodesis of adolescent idiopathic scoliosis, while only 7% following anterior instrumentation and arthrodesis. DESIGN: Proximal and distal sagittal angulation measurements, and global sagittal plumb measurements were performed on standing radiographs obtained pre-operatively, and at the latest follow-up on 174 patients who underwent posterior and anterior instrumentation and arthrodesis. RESULTS: At latest follow- up, 13 of 141 patients (9.2%) developed PJK following posterior instrumented arthrodesis with an average measurement of +16.2º (range 11-23º). One of 29 patients (3.5%) developed PJK following anterior instrumented arthrodesis. Five of 145 patients (3.4%) developed DJK following posterior arthrodesis and no patients developed DJK following anterior arthrodesis. Average DJK in patients affected was +7.6º (range 5-10º). Proximal junctional kyphosis did not lead to positive global sagittal alignment compared to patients without PJK. CONCLUSION: Proximal junctional kyphosis following posterior arthrodesis occurred less in this cohort than previous literature reports. Distal junctional kyphosis was less common in both posterior and anterior groups. PJK did not lead to an increase in global sagittal alignment. en
dc.description.sponsorship Glattes, Chris Orthopedic Surgery en
dc.format.extent 3080192 bytes
dc.format.mimetype application/vnd.ms-powerpoint
dc.language.iso en_US en
dc.subject proximal junctional kyphosis en
dc.subject distal junctional kyphosis en
dc.subject adolescent idiopathic scoliosis en
dc.title The prevalence of proximal and distal junctional kyphosis following isola instrumentation and arthrodesis for adolescent idiopathic scoliosis en
dc.type Presentation en

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