George W. Knight

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A total of 2,905 pedicle measurements were made from T1-L5. Measurements were made from spinal computerized tomography (CT) scan examinations and individual vertebral specimen roentgenograms. Parameters considered were the pedicle isthmus width in the transverse and sagittal planes, pedicle angles in the transverse and sagittal planes, and the depth to the(More)
STUDY DESIGN Change in lumbar lordosis was measured in patients that had undergone posterolateral lumbar fusions using transpedicular instrumentation. The biomechanical effects of postoperative lumbar malalignment were measured in cadaveric specimens. OBJECTIVES To determine the extent of postoperative lumbar sagittal malalignment caused by an(More)
STUDY DESIGN Human vertebral morphologic data were compiled from anatomic skeletal collections from three museums. OBJECTIVES To quantify the morphometric characteristics of the pedicles of the immature thoracolumbar spine. SUMMARY OF BACKGROUND DATA Little is known of pedicle morphology of the immature spine as related to pedicle screw fixation. (More)
A biomechanical analog of curve progression and orthotic stabilization in idiopathic scoliosis has been developed using the classical theory of curved beam-columns. The interaction of the spinal musculature and other supporting structures is incorporated in the model using an equivalent flexural rigidity. The stability of a given scoliotic curve relative to(More)
Poor prediction of psychomotor performance in dentistry using traditional admissions tests and prior academic performance, as well as the serious consequences of poor performance for both students and faculty, suggest that better predictors are needed. Two tests of waxing skill were incorporated into the first semester freshman dental anatomy course and(More)
For the process of question-guided problem-solving to work successfully, several conditions must exist: 1) presence of valid and reliable criteria for evaluating product (DO) and performance (DP), 2) development of learning resources such as life-sized examples, 3) training sessions in the application of criteria and use of the process for both faculty and(More)
We evaluated the influence of the penetration of wires into the neural canal during segmental wiring in a three-part study. First we examined the anatomy of the thoracic spine, specifically the laminar and interlaminar dimensions, as well as the epidural space. In the second part, we evaluated the depth of penetration of wires into the spinal canal at the(More)
Profundus tendon lacerations were repaired in the central toes of 216 chickens, and the digits were either immobilized in a cast or allowed immediate constrained motion in a tethering splint. The effect of digital motion on the early phases of tendon healing was investigated by comparing the rupture strengths of the two groups during the first 40 days after(More)