Comportamento do polímero de mamona (Ricinus communis) em ossos de codorna domésticas (Coturnix japonica)

Abstract

In arthopedic surgery thera are.frequentlysituations in that the surgeon faces severa bone losses caused by high-energy trauma, tumors of infections. Repairing these losses require knowledge about fillingmateriais. Those materiais can be biological, synthetic or metallic, with emphasis in bony grafts and biomaterial implants. The increase of the use of birds as pets is leading to an increasing number of clinicaland surgical cases related to this taxon, where fractures are the most commonly observed surgical problems. The objective of this study was to evaluate clinical, radiological,macroscopic and microscopic effects of the polyurethane derived from castor oU(Ricinus communis) polymer,when implanted in the humerus of domestic quails (Cotumixjaponica).There were used twenty male and female quails, randomly distributedin four groups of tive individuais.The birds received the implantsin the left hurnerus, being submitted to daily physical examination during the postoperative period, immediate and biweekll radíological examination, and maaoscopic and microscopicevaluation at the 15 ,30th, 60thand 90thdays. Clinically,there were not observed local, regional or systemic changas. Radiologically, it was observed increase in local density with no signs of changes in bone or adjacent tissue, as well as in the air sacs. Macroscopicanalysis revealed that the polyurethane derived trom castor oi!polymerwas not absorbed in none of the four groups, remaining implanted within the pneumatic bone. Its resistance, however, have changed. Microscopic examination evidenced minimum inflammatoryreadion, slight fibrosis around the implants, and osteo-integration with presence of trabeculi and bone marrow inside the implants. Concluding, implants of polyurethane derived trom castor oil polymer are biocompatiblein quails, with occurrence of osteo-integration, and can be used in orthopedic surgery in this species.