Porous nitinol vs. titanium intervertebral fusion implants: Computer tomography, radiological and histological study of osseointegration capacity
✍ Scribed by M. Assad; F. Likibi; P. Jarzem; M. A. Leroux; C. Coillard; Ch.-H. Rivard
- Publisher
- John Wiley and Sons
- Year
- 2004
- Tongue
- English
- Weight
- 307 KB
- Volume
- 35
- Category
- Article
- ISSN
- 0933-5137
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✦ Synopsis
Abstract
The functionality of a new metallic interbody fusion implant manufactured out of porous nitinol (PNT) was evaluated in sheep and compared to a conventional titanium intervertebral cage packed with autologous iliac crest bone. Both device types were implanted at two non‐contiguous intervertebral lumbar sites. The objective was to evaluate the osseointegration capacity after 3, 6 and 12 months of implantation in the presence of these two implant types subjected to the same mechanical loads. Two‐dimensional radiolology, computer tomography, and histology were used as techniques of parameters evaluation. The results indicated that PNT obtained a better intervertebral osseointegration capacity compared to the TiAlV cage. The functional difficulties of the titanium implant were related to its instability at the implantation site possibly due to a biofunctionality problem. The biocompatibility of both implants seemed however comparable.