Publications by authors named "J Heyer"

Case: A pediatric patient with focal fibrocartilaginous dysplasia (FFCD) developed angular deformity and growth arrest despite standard guided growth management. The patient underwent implant-mediated guided growth for proximal tibia varus deformity which recurred; subsequently, a physeal bar of the medial proximal tibia was diagnosed, which progressed to physeal arrest.

Conclusion: Treatment options for FFCD-associated angular deformity include observation and guided growth.

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Article Synopsis
  • The study explores the relationship between traditional radiographic measurements of shoulder asymmetry and new surface topographic measurements, suggesting these relationships will be weak.
  • Data was collected from a registry of patients with idiopathic scoliosis, focusing on ST scanning along with standard radiographic evaluation methods.
  • Results showed that while the ST-based AC angle showed moderate-to-strong correlations with some radiographic measures, other ST measurements exhibited weak or no correlation, indicating a complex relationship between the two measurement types.
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More than 13 million children are born preterm annually. Prematurity-related mortality accounts for 0.9 million deaths worldwide.

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Introduction: Early-onset scoliosis (EOS) refers to spinal curvature exceeding ten degrees in the coronal plane in patients under 10 years old. When non-operative management fails to control the curvature, surgical intervention may be indicated. In younger patients, growth-friendly instrumentation may be necessary to allow for continued spinal growth while controlling the curve, which includes magnetically control growing rods (MCGR).

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Historically, pedicle screw accuracy measurements have relied on CT and expert visual assessment of the position of pedicle screws relative to preoperative plans. Proper pedicle screw placement is necessary to avoid complications, cost and morbidity of revision procedures. The aim of this study was to determine accuracy and precision of pedicle screw insertion via a novel computer vision algorithm using preoperative and postoperative computed tomography (CT) scans.

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