In vivo evaluation of porous hydrogel pins to fill osteochondral defects in rabbits

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• 作者：Tú ; lio Pereira Cardoso^a ; ^{tuliopcardoso@gmail.com} ; André ; Petry Sandoval Ursolino^a ; Pamela de Melo Casagrande^a ; Edie Benedito Caetano^a ; Daniel Vinicius Mistura^b ; Eliana Aparecida de Rezende Duek^a
• 关键词：Articular cargilage ; Hydrogels/chemistry ; Rabbits
• 刊名：Revista Brasileira de Ortopedia (English Edition)
• 出版年：2017
• 出版时间：January-February 2017
• 年：2017
• 卷：52
• 期：1
• 页码：95-102
• 全文大小：1888 K
• 卷排序：52

文摘

This experimental study aimed to evaluate the biological performance of poly (l-co-D, l-lactic acid)-co-trimetilene carbonate/poly (vinyl alcohol) (PLDLA-co TMC/PVA), hydrogel scaffolds, as an implant in the filling (and not in the repair) of osteochondral defects in New Zealand rabbits, assessing the influence of the material in tissue protection in vivo.MethodsTwelve rabbits were divided into groups of nine and 16 weeks. In each animal, an osteochondral defect was created in both medial femoral condyles. In one knee, a hydrogel scaffold was implanted (pin group) and in the other, the defect was maintained (control group). A histological analysis of the material was performed after euthanasia.ResultsThe condyles of the pin group showed no inflammatory reaction and were surrounded by a fibrous capsule. The control group presented higher bone growth in the areas of the defect, but with disorganized articular cartilage, evident fibrosis, bone exposure, atrophy, and proliferation of synovial membrane.ConclusionThe hydrogel pins are promising in filling osteochondral defects, generally do not cause inflammatory reactions, and are not effective in the repair of osteochondral defects.