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Orthopaedic Proceedings
Vol. 94-B, Issue SUPP_XXXVIII | Pages 182 - 182
1 Sep 2012
Thompson GH Ahmadinia K Poe-Kochert C Son-Hing JP
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Purpose

Management of early onset scoliosis (EOS) can be very challenging. Surgery is indicated when orthotics and casting fail. Growing rod instrumentation has become an effective approach in controlling the deformity while allowing spinal growth. However, as with any surgery, there are known complications including failure of the proximal foundation. We analyzed our patients who underwent growing rod instrumentation and identified factors that were correlated with proximal foundation failure.

Method

Our Pediatric Orthopaedic Spine Database (1992–2010) was reviewed for all patients who underwent growing rod instrumentation. Sixty-six patients with EOS were identified and divided into two groups: Group 1 – proximal foundation failure; and Group 2 – no incidents of proximal failure. The two groups were evaluated for differences in age, sex, weight, upper vertebral level in construct, presence of apical fusion, and pre-operative curve magnitude.


Orthopaedic Proceedings
Vol. 94-B, Issue SUPP_XXXVIII | Pages 179 - 179
1 Sep 2012
Thompson GH Liu RW Armstrong DG Levine AD Gilmore A Thompson GH Cooperman DR
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Purpose

The undulating pattern of the distal femur is well recognized. Radiographs do not always represent the full extent of the undulations. With recent increasing use of guided growth technique in the distal femur, it is important to define safe zones for screw placement.

Method

We performed an anatomical study on 26 cadaveric distal femoral epiphyses, ages 3–18 years. High resolution three-dimensional surface scans were obtained with a laser scanner, and were analyzed to determine the absolute height of the central physeal ridge, and the central physeal ridge height with respect to the highest points medially and laterally.