John Cheung

Jan C Cool3
Jim R Van Horn2
Rutger Nijlunsing2
3Jan C Cool
2Jim R Van Horn
2Rutger Nijlunsing
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Although analysis of scoliotic deformity is still studied extensively by means of conventional roentgenograms, computer-assisted digital analysis may allow a faster, more accurate and more complete evaluation of the scoliotic spine. In this study, a new computer-assisted measurement method was evaluated. This method uses digital reconstruction images for(More)
The paraspinal muscles have been implicated as a major causative factor in the progression of idiopathic scoliosis. Therefore, the objectives of this preliminary study were to measure the electromyographic activity (EMG) of the paraspinal muscles to determine its relationship to progression of the scoliotic curve. Idiopathic scoliotic patients were selected(More)
BACKGROUND Paraoxonase (PON) has anti-atherogenic activity due to its protective function against low density lipoprotein (LDL) oxidation. Alteration of enzyme activity due to polymorphisms in the PON genes may influence the development of atheroma and thus affect stroke risk. Three PON genes (PON1, PON2 and PON3) have been identifiedand mapped to(More)
  • Derek Friedrich Petrus van Deurzen, Vanessa Antoinet Bernice Scholtes, Nienke Willemien Willigenburg, Navin Gurnani, Lukas Pieter Eduard Verweij, Michel Pieter Jozef van den Bekerom +23 others
  • 2016
BACKGROUND Optimal treatment of the diseased long head of the biceps (LHB) tendon during rotator cuff repair remains a topic of debate: tenotomy or tenodesis. A recent meta analysis revealed no difference in strength or functional outcome between treatments. The included studies varied in methodological quality, and only two were randomized controlled(More)
INTRODUCTION Hip fractures are a leading cause of mortality and disability worldwide, and the number of hip fractures is expected to rise to over 6 million per year by 2050. The optimal approach for the surgical management of displaced femoral neck fractures remains unknown. Current evidence suggests the use of arthroplasty; however, there is lack of(More)
To determine whether the perception of body posture is altered in idiopathic scoliosis, a simple neurophysiologic experiment through laser line projection was conducted to test this hypothesis in three groups of individuals: 89 children with idiopathic scoliosis (IS), 50 children with congenital scoliosis (CS) and 45 controls without scoliosis. The subjects(More)
Quantitative analysis of 3D spinal deformities includes measurements related to individual vertebrae and measurements related to the overall shape of the spine. For the latter aspect, we propose to build a 3D model of the line that connects all vertebrae centres. We present two methods that allow reconstructing this vertebral body line in a quick and easy(More)
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