In Vitro Stabilizing Effect of a Transforaminal Compared With Two Posterior Lumbar Interbody Fusion Cages
| Autor: | Erich Kast, Annette Kettler, Werner Schmoelz, Lutz Claes, Maria Gottwald, Hans-Joachim Wilke |
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| Rok vydání: | 2005 |
| Předmět: |
Polymers
Biocompatible Materials In Vitro Techniques Polyethylene Glycols Degenerative disc disease Benzophenones Lumbar interbody fusion Materials Testing Physics::Atomic and Molecular Clusters Humans Medicine Orthopedics and Sports Medicine Range of Motion Articular 110300 CLINICAL SCIENCES Orthodontics Lumbar Vertebrae business.industry Neutral zone Background data Ketones medicine.disease 090300 BIOMEDICAL ENGINEERING Biomechanical Phenomena Lateral bending Condensed Matter::Soft Condensed Matter Spinal Fusion Lumbar spine Neurology (clinical) Range of motion business Cage |
| Zdroj: | Spine |
| ISSN: | 0362-2436 |
| DOI: | 10.1097/01.brs.0000186466.01542.8c |
| Popis: | Study Design. An in vitro biomechanical flexibility test on different lumbar interbody fusion cages using monosegmental lumbar spine specimens. Objective. To investigate the stabilizing effect of a transforaminal lumbar interbody fusion (TLIF) cage compared with two established posterior lumbar interbody fusion (PLIF) cages. Summary of Background Data. TLIF using interbody fusion cages is gaining more and more popularity in the treatment of degenerative disc disease. However, only little is known on its biomechanical behavior. Methods. Eighteen intact human lumbar spine segments were tested for flexibility in a specially designed spine tester. Pure moments were applied in the three main planes, and range of motion and neutral zone were determined. Then, TLIF using the sickle-shaped MOON cage (AMT AG), PLIF using the cubic Stryker cages (Stryker Orthopaedics), or PLIF using the threaded BAK cages (Zimmer Spinetech) was carried out and the specimens tested again. Results. The stability after implantation of the MOON TLIF cage did not significantly differ from that after implantation of the cubic Stryker PLIF cages (P > 0.05). In contrast, the threaded BAK PLIF cages had a significantly higher primary stability than both the MOON TLIF and the Stryker PLIF cages in lateral bending, flexion, and extension (P 0.05). Conclusions. In terms of its stabilizing effect, TLIF using the MOON cage can be recommended as an alternative to PLIF using the cubic Stryker cages. Compared with the threaded BAK PLIF cages, however, the MOON TLIF cage provides a lower primary stability in lateral bending, flexion, and extension. |
| Databáze: | OpenAIRE |
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