Ho-Joong Kim

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BACKGROUND CONTEXT To our knowledge, no large series comparing the risk of vertebral artery injury by C1-C2 transarticular screw versus C2 pedicle screw have been published. In addition, no comparative studies have been performed on those with a high-riding vertebral artery and/or a narrow pedicle who are thought to be at higher risk than those with normal(More)
STUDY DESIGN In vitro experiment using rabbit nucleus pulposus (NP) cells seeded in atelocollagen scaffolds under the stimulation of growth factors. OBJECTIVE To demonstrate the effect of anabolic growth factors in rabbit NP cells cultured in atelocollagen type I and type II. SUMMARY OF BACKGROUND DATA Atelocollagen provides intervertebral disc (IVD)(More)
Patients desire less pain and faster recovery of range of knee motion after total knee arthroplasty (TKA). While minimal invasive surgery (MIS) TKA appears to meet these needs, concerns exist regarding component malpositioning. Navigation systems can reduce the incidence of component misalignment. The present prospective randomized study compared limited(More)
STUDY DESIGN Retrospective study. OBJECTIVES To investigate the overall surgical outcome of lumbar fusion surgery in patients with Parkinson disease (PD). SUMMARY OF BACK GROUND DATA: Poor bone quality and muscular dysfunction are important clinical manifestations connected with musculoskeletal diseases in PD patients. These secondary changes caused by PD(More)
STUDY DESIGN Prospective randomized controlled trial. OBJECTIVE The aim of this study was to monitor the quality control of robot-assisted pedicle screw fixation accuracy by using a cumulative summation (CUSUM) test at the initial stage of its application. SUMMARY OF BACKGROUND DATA Although robot-assisted pedicle screw fixation reduces screw(More)
The presence of degeneration alters the stress within that particular degenerated disc. Therefore, the state of degeneration of the disc at the level adjacent to a single level fusion would influence the rate of subsequent further degeneration of that same adjacent disc. Therefore, the purpose of this study was to investigate the biomechanical effect of the(More)
PURPOSE The purpose of this study was to investigate the effects of unilateral pedicle screw fixation on the fusion segment and the superior adjacent segment after one segment lumbar fusion using validated finite element models. MATERIALS AND METHODS Four L3-4 fusion models were simulated according to the extent of decompression and the method of pedicle(More)
The advancement of next-generation nanocarriers as drug delivery platforms will require the incorporation of these useful properties, through which adverse side effects of chemotherapy drugs can be avoided and overall treatment and diagnosis improved. As such, a variety of nanoparticle-based delivery systems have already been widely investigated and(More)
The purpose of this study is to investigate the change in biomechanical milieu following removal of pedicle screws in instrumented single level lumbar arthrodesis. Using a validated finite element (FE) model of the intact lumbar spine (L2–5), two scenarios of L3–4 lumbar fusion were simulated: posterolateral fusion (PLF) at L3–4 using pedicle screws (PLF(More)
STUDY DESIGN A prospective case control study. OBJECTIVES To investigate the risk of a fall by using functional mobility tests in patients with lumbar spinal stenosis (LSS) via a comparison with patients with knee osteoarthritis (KOA). SUMMARY OF BACKGROUND DATA LSS is a degenerative arthritic disease in the spine that results in decreasing function,(More)