Roland D Donk

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OBJECTIVE To investigate the number of subsidences of inserted cervical carbon fiber cages and to define predictive factors for subsidence. METHODS All patients treated for a cervical herniated disc and fusion with a cervical carbon fiber cage between January 2002 and December 2003 were retrospectively identified. The radiological examinations were(More)
OBJECT The authors evaluate the effects of implantation of a carbon fiber cage after anterior cervical discectomy (ACD) on the height of the foramen and the angulation between endplates of the disc space. METHODS Thirteen consecutive patients who were scheduled for standard microscopic ACD and interbody fusion underwent thin-slice (1.5 mm) spiral(More)
OBJECTIVE A meta-analysis was performed to evaluate whether a beneficial clinical effect of cervical disk prostheses over conventional cervical diskectomy with fusion exists. METHODS A literature search was completed ending February 4, 2009, that included the abstract books of recent major spine congresses. All studies reported the results of single-level(More)
OBJECTIVE AND IMPORTANCE Cervical arthroplasty is a relatively new method to maintain motion after cervical anterior discectomy. Two cases are presented in which bony fusion occurred around a cervical disc prosthesis. CLINICAL PRESENTATION A 30-year-old man and a 49-year-old woman underwent a right-sided anterior cervical discectomy because of pain in the(More)
  • Huub J Meijerink, Marco Barink, +4 authors Maarten C de Waal Malefijt
  • 2007
BACKGROUND A medialization of the femoral component in a total knee arthroplasty (TKA) causes abnormal patellar tracking, which could result in patellar instability, pain, wear, and failure. Previous reports defined medialization in relation to the neutral position of the femoral component, but omitted to compare it to the anatomical position of the(More)
Postinjury cervical spine instability typically requires surgical treatment in the acute or semiacute stage. The authors, however, report on three patients with older (> 8 weeks) untreated bilateral cervical facet dislocation. In two patients they attempted a classic anterior-posterior-anterior approach but failed. The misalignment in the second stage of(More)
BACKGROUND PROCON was designed to assess the clinical outcome, development of adjacent disc disease and costs of cervical anterior discectomy without fusion, with fusion using a stand alone cage and implantation of a Bryan's disc prosthesis. Description of rationale and design of PROCON trial and discussion of its strengths and limitations. METHODS/DESIGN(More)
Cervical artificial discs are frequently implanted. Clinical data are frequently presented. However, biomechanical data are scarce. The literature is extensively reviewed following general rules for systemic review. The manufacturers of cervical artificial discs are requested for information. Only 10 articles were suitable for review. Together with some(More)
OBJECTIVE The Neck Disability Index (NDI) is a patient self-assessed outcome measurement tool to assess disability, and that is frequently used to evaluate the effects of the treatment of neck-related problems. In individualized medicine it is mandatory that patients can interpret data in order to choose a treatment. A change of NDI or an absolute NDI is(More)
Study Design/Objective. A single-centre, prospective, non-comparative study of 25 patients to evaluate the performance and safety of the Memory Metal Minimal Access Cage (MAC) in Lumbar Interbody Fusion. Summary of Background Data. Interbody fusion cages in general are designed to withstand high axial loads and in the meantime to allow ingrowth of new bone(More)