By Robert Gunzburg, H. Michael Mayer, Marek Szpalski, Max Aebi
Joint substitute is a logical step within the therapy of serious joint pathologies with irreversible lesions resisting conservative remedy. on the spinal point, arthrodesis turned, very early, the superior of remedy for serious intervertebral disc pathologies. the subsequent logical step was once to check useful substitute, and this step was once taken as early as 1956, whilst the 1st intervertebral implant was once defined. even if, it took many extra years and a superb number of proposed implant designs prior to medical purposes can be attempted.
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Extra info for Arthroplasty of the Spine
2). This tight fit provides immediate antero-posterior and lateral stability. Operative data were compiled on 97 procedures. Results Table 3 summarizes the clinical success results based on relief of preoperative symptoms (as assessed by the patient) and relief of neurological signs (as assessed by the surgeon) for the I-year and 2-year follow-up periods. Of the 46 patients rated for clinical success at I-year follow-up, 40 (87%) were classified as a clinical success (excellent/good/fair). This result is better than the targeted success rate of 85% excellent/good/fair.
6 Free-floating biconvex sliding core encased in concave endplates Center of Nucleus moves dorsally Table 1 Mean range of motion in degrees (±SD) at level L4-L5, + Translation as published by Ahrens et al. 8 SB Charite artificial disc showing rotation and translation physiologic/mechanically unfavorable stresses. Flexion, for instance, combines [7,9]: 1. Upward sliding movement of inferior articular processes 2. Tension of zygapophysial joint capsule 3. Tension of ligaments of intervertebral joint: (i) supraspinous and interspinous ligament, (ii) ligamentum flava 4.
Presented at the 13th Annual Meeting of the North American Spine Society. San Francisco, 28-31 October 33. Saal JS, Saal JA (2000) Management of chronic disco genic low back pain with a thermal intradiscal catheter. Spine 25:382-388 34. Schonmayr R, Busch C, Lotz C, LotzMetz G (1999) Prosthetic disc nucleus implants: the Wiesbaden feasibility study, 2 years follow-up in ten patients. Riv Neuroradiol12 [SuppllJ:163-170 35. Senegas J (2002) Mechanical supplementation by non-rigid fixation in degenerative intervertebral lumbar segments (the Wallis system).