Dynafix Titanium
DYNAFIX is a system used to stabilize the lumbo-sacral spine. The device must be implanted in the interspinous space, maintaining partial mobility at the fixed level and reducing forces on the posterior joints.
The device implantion results in openning the foramen, lordosis partial alteration, and restauring the intervertebral disc function.
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INTENDED USE:
- Unstable spine;
- Disc hernia at one or more levels;
- Recurrent disc hernia;
- Degenerative or iatrogenic disc disease;
- Lumbar stenosis;
- Chronic and untreatable lumbar pain due to Facet Joint Syndrome;
- Chronic and untreatable lumbar pain due to disc disfunction and,
- Conditions affecting L5-S1 level (both from facet or disc origin).
SPECIAL USE:
- Biomechanical compensation at arthrodesis adjacent levels and,
- Facet arthrosis.
ADVANTAGES:
- Safe, quick and cost effective procedure;
- Partial mobility;
- Reduced forces on posterior joints;
- Hyperlordosis is reduced;
- The foramen is kept opened;
- Adjacent disc degeneration is prevented;
- Future surgical options on the treated segment and,
- Possibility of implantation at L5-S1 level.
- Retains all capsule-synovial elements re-aligning joint fibres.
- Forces relief on the disc due to intradiscal pressure reduction.
- Prevention of disc overload and arthrodesis adjacent facet syndrome.
REFERENCES
• The effects of an interspinous implant on intervertebral disc pressures, Swanson, K; Lindsey, D; Zu Cherman, J; Scott, A - Spine: Volume 28, Number 1, January 2003 PP 26-32
• Prelimimary design and experimental studies of a novel implant, Minns, RJ; Walsh WK - Spine: Volume22, 1997 PP 1819 - 1827
• Biomecanics of spine stabilization, Benzel, EC - Thieme - AANS Publications - USA, 2001
• Moglichkeiten Zur Kostenoptimierten im plantatauswahl in der wirbelsaulenchi rurgie, Vieweg, U - Zentralblatt Fur Nerochirurgie - 4/03 - 64, Jahrgang 2003 - Seite 159-165
• Minimally Invasive Spine Surgery - Mayer, HM - Springer - Berlin, 2000
• Study of a Semi-rigid interspinous “U” fixation system - 106 patients over six years, SA Mani, J - Journée de Neurochirurgie Du Rachis - Lyon, France - 2000
• Interspinous process distraction (IPD) “X-Stop” for treatment of intermittent neurogenic claudication - Report St. Francis Medical Technologies 2003 (www.sfmt.com)
• The “U” system for treatment of lumbar spine di seases - report - Journée de Neurochirurgie Du Rachis - bor deaux, France 2003
• Bandscheibendedingte erkrankungen - Kramer. J Georg Thieme Verlag, Stuttgart, 1990
• Journées Du Rachis De Paris - Saillant, G; Deburge, A - Sauramps - Imprimerie Lienhart, Paris 2002
• Surgical management of low back pain - Res Nik, DK; Haid, RW - AANS Publications - USA 2001
• Joint Structure and Function: a comprehensive analysis - Norkin, C; Levangie, P - A. Davis Company, USA 2001
• LA Chirurgie de La Hernie Discale Lombaire - Comparaison entre méthode endoscopique et à ciel ouvert - Blamoutier, A - CMC Volney, Rennes, France 2003
• Keyhole concept in neurosurgery - With endoscope - assisted microsurgey and case studies, Perneczky, A; Muller-Forell. W; Van Lindert, E; Fries, G - Thieme - Stuttgart 1999
• Endoscopic anatomy for neurosurgery - Perneczky, A; Tschabitscher, M; Resch, K D M - Thieme - Stuttgart, 1993
• Minimally invasive surgery of the spine - Supplement to Neurosurgery - Fessler, RG - Guest Editor - Vol 51, Supplement 2 - November 2002
• Dynamic stabilization in the treatment of low back pain due to degenerative disorders semgupta D. K. In the Lumbar Spine; 3º EO; Charter 38 - Lippincott WW - May 2004
• Samani J. Etude dún systeme semi-rigide de fixation inter-epineux “U”. Fixano, 2000
• Kaech DL, Fernandez C, Lombardi-Weber D. The interspinous “U”: a new restabilization device for the lumbar spine. Spine Restabilization Procedures, 355. 2002
• Kaech DL, Fernandez C, Haninec P. Expériences préliminaires avec lé “U” interépineux. Special Gieda, 403
• Ribas A. Interspinous “U” system - early clinical experience. Spineweek 2004, 186. 2004
• Ribas A. “Dynamic stabilization using Dynafix - Analysis of 100 cases” - Neuroclinic Bolletin, August, 2004
• Ribas, Antonio "Lumbar Arthroplasty With Dynafix - Clinical Experience with 218 Implants" - Proceedings of the 13th World Congress of Neurological Surgery - Marrakesh, Marocco - June, 2005 - Medimond Ed. - INDEXED - Volume ISBN 88- 7587- 160- 4
• Ribas, Antonio " Clinical Experience in Three Years Using Dynafix - a Dynamic Interspinous Process Distraction System" - oral presentation - Proceedings of The World Spine III , Rio de Janeiro, Brazil - August, 2005
• Ribas, Antonio - "Disk Regeneration After Lumbar Arthroplasty With Dynafix" - Proceedings of The 20 th North American Spine Society - Philadelphia, PA, USA - September, 2005.
Literature
 Diskogemic low back pain – the pathogenesis and disk rescue with Dynafix system.
APLAR, 1-5 August 2006, Kuala Lumpur, Malaysia | A Ribas 1, 2 , J Ruttermann 2, R Oertmüller 2.
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