title: In vivo biocompatibility of an aliphatic crosslinked polyurethane in rabbit.
abstract: A cage implantation technique has been adopted in a rabbit animal model to investigate the biocompatibility of an aliphatic crosslinked polyurethane based on hexamethylene diisocyanate (HDI). In this study, four cages are represented; the cage containing the candidate polyurethane material, biomedical grade polyurethane (Tecoflex), the commercial grade polyvinylchloride (PVC), and an empty cage which were implanted subcutaneously in rabbits. Exudates were aspirated from these cages at 4, 7, 14, and 21 days postimplantation. Exudates were analyzed for variations in proteins, cell counts, and extracellular enzymes. Results with the four types of cage implants showed that the candidate polyurethane caused an inflammatory response comparable to that caused by medical-grade Tecoflex and the empty cage control.
authors.affiliation: Division for Technical Evaluation of Biomaterials, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, India.
authors.forename: M
authors.initials: M
authors.lastname: Jayabalan
authors.forename: N S
authors.initials: NS
authors.lastname: Kumar
authors.forename: K
authors.initials: K
authors.lastname: Rathinam
authors.forename: T V
authors.initials: TV
authors.lastname: Kumari
mesh_terms: D000469:Alkaline Phosphatase / Q000378:metabolism; D000818:Animals; D003485:Cyanates / Q000737:chemistry; D004055:Differential Thermal Analysis; D004586:Electrophoresis; D005122:Exudates and Transudates / Q000378:metabolism; D017953:Isocyanates; D007958:Leukocyte Count / Q000187:drug effects; D008247:Lysosomes / Q000201:enzymology; D008422:Materials Testing; D011140:Polyurethanes / Q000737:chemistry / Q000633:toxicity*; D011143:Polyvinyl Chloride / Q000633:toxicity; D019736:Prostheses and Implants; D011506:Proteins / Q000378:metabolism; D011817:Rabbits
chemical_list: D003485:Cyanates; D017953:Isocyanates; D011140:Polyurethanes; D011506:Proteins; C015262:1,6-hexamethylene diisocyanate; D011143:Polyvinyl Chloride; D000469:Alkaline Phosphatase