By Robert Gunzburg, H. Michael Mayer, Marek Szpalski, Max Aebi
Joint substitute is a logical step within the remedy of critical joint pathologies with irreversible lesions resisting conservative treatment. on the spinal point, arthrodesis grew to become, very early, the choicest of therapy for critical intervertebral disc pathologies. the subsequent logical step used to be to check sensible alternative, and this step was once taken as early as 1956, whilst the 1st intervertebral implant was once defined. although, it took many extra years and an excellent number of proposed implant designs prior to scientific purposes will be attempted.
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This is applied to the Ti surface in an electrochemical process that results in: 1. lm 2. The retention of the open-cell structure of the Ti coating 3. A mechanically strong bond, which is necessary to cope with the stresses applied on the coating during implantation translation . The position of the instantaneous axis of rotation (IAR) point is not constant, and changes depending on the joint position. This important aspect of spinal biomechanics is replicated in the functional motion of the SB Charite, due to its three-component set-up, which incorporates a floating sliding core, whose convex surfaces are encased in the concave cavities of the metal endplates (Fig.
49-40-539950, Fax: +49-40-5383309 History, design and biomechanics of the LINK S8 Charite artificial disc Abstract The SB Charite I artificial disc was developed in 1982 by Schellnack and Buttner-Janz and modified as the Mark II version in 1984. Both types were manufactured in the former German Democratic Republic (GDR). Today's design, the SB Charite III, was first produced by LINK in 1987. Five sizes of the artificial disc in various angulations are available today, with a double coating of titanium/calciumphosphate.
However, the results seem to not always justify these decisions. 2 years) were treated with fusion for degenerative disorders of the lumbar spine. The diagnoses are listed in Table 1. Spinal fusion was performed in all patients; in 91 cases it was combined with segmental decompression. 8%, posterior lumbar interbody fusion (PUF) in 3% Table 1 Diagnosis for spinal fusion (n=134) n Diagnosis a 82 29 Degenerative disc disease Degenerative spondylolisthesis Failed back (following discectomy) Total 23 134 aSpinal stenosis was an additional diagnosis in 91 of the patients Fig.