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Article type: Research Article
Authors: Rhalmi, S. | Odin, M. | Assad, M.; | Tabrizian, M. | Rivard, C.H. | Yahia, L’H.;
Affiliations: Centre de Recherche Pédiatrique, Hôpital Ste‐Justine, 3175 Côte Ste‐Catherine, Montréal (QC) H3T 1C5, Canada | ClinTrials BioResearch (CTBR) Ltd., 87 Senneville Road, Senneville (QC) H9X 3R3, Canada | Groupe de Recherche en Biomécanique/Biomatériaux (GRBB), École Polytechnique de Montréal, C.P. 6079, Succ. “Centre‐Ville”, Montréal (QC) H3C 3A7, Canada
Note: [] Address correspondence to: L’Hocine Yahia, Ph.D. Tel.: +1 514 340 4711, ext. 4378; Fax: +1 514 340 4611; E‐mail: yahia@grbb.polymtl.ca.
Abstract: Porous nickel‐titanium (NiTi) alloys have demonstrated bone attachment as well as tissue ingrowth in the past. However, very few studies have compared porous NiTi soft and hard tissue reactions, and in vitro cell response. We therefore have evaluated the general muscle and bone reaction to porous nickel‐titanium. The latter material was implanted in rabbit tibias and back muscle, and assessed after three, six and twelve weeks of implantation. Porous NiTi specimens did not cause any adverse effect regardless of both implantation site and post‐surgery recovery time. Muscle tissue exhibited thin tightly adherent fibrous capsules with fibers penetrating into implant pores. We observed that attachment strength of the soft tissue to the porous implant seemed to increase with post‐implantation time. Bone tissue demonstrated good healing of the osteotomy. There was bone remodeling characterized by osteoclastic and osteoblastic activity in the cortex. This general good in vivo biocompatibility with muscle and bone tissue corresponded very well with the in vitro cell culture results we obtained. Fibroblasts seeded on porous nickel‐titanium sheets managed to grow into the pores and all around specimen edges showing an another interesting cytocompatibility behavior. These results indicate good biocompatibility acceptance of porous nickel‐titanium and are very promising towards eventual NiTi medical device approbation.
Keywords: Nickel‐titanium, porous implant, cytocompatibity, biocompatibility, tissue ingrowth
Journal: Bio-Medical Materials and Engineering, vol. 9, no. 3, pp. 151-162, 1999
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