PESQUISA VETERINÁRIA BRASILEIRA

Abstract in English:

ABSTRACT.- Ferro D.G. & Gioso M.A. 2009. [Clinical study of effectiveness of an Anorganic Bone Matrix and Cell-Binding Peptide (ABM/P-15), PepGen-P15®: Application in advanced periodontal lesions of dogs.] Estudo clínico da aplicação de matriz inorgânica de osso associado a peptídeo sintético de adesão celular (MIO/P-15), PepGen P-15®, em lesões periodontais avançadas de cães. Pesquisa Veterinária Brasileira 29(2):109-116. Laboratório de Odontologia Comparada, Departamento de Cirurgia, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, Av. Prof. Dr. Orlando Marques de Paiva 87, São Paulo, SP 05508-900, Brazil. E-mail: deferro@usp.br The development of biologic modalities designed to enhance bone regeneration and wound healing of specific periodontal sites continues to be a challenge and has been accomplished through the cell binding activity of Type-I collagen. These have been provided by a synthetic cell biding peptide (P-15), associated to a anorganic bone matrix (ABM) to form ABM/P-15. The aim of this study was to evaluate the attachment loss and periodontal pocket response in teeth after 3 and 6 months with ABM/P-15 graft application. Twenty one dogs from the Veterinary Hospital, University of São Paulo, were anesthetized in order to accomplish periodontal treatment and 132 teeth faces with attachment loss were treated. From these, 36.4% (48 faces) received cell binding peptide and 63.6% (84 faces) compounded the control group that received conventional treatment (muco-gingival flap and root planning). The procedure was documented by intra-oral radiography and all periodontal probings were photographed. After 3 and 6 months, the animals were re-anesthetized in order to accomplish new photography, radiography and periodontal probing exams. The 48 attachment loss faces that received graft material exhibited 40% of regeneration rate after 6 months. The control faces did not change their attachment level. The palatal face presented the better regeneration rates (40%) and the canines and molars teeth showed the better responses (57.14% and 65%, respectively). There was no post-surgical infection related to absence of oral home care. It can be concluded that ABM/P-15 helps a more rapidly periodontal structure re-attachment and regeneration, including alveolar bone. Its application was easy and practical, and the post-surgical complications incidence was low. Nevertheless, more work is necessary to evaluate the amount and the quality of formed bone and periodontal ligament.

• Veterinary dentistry periodontal disease animal graft animal bone implant bone regeneration type I Collagen P-15 cell-binding peptide dog

Abstract in Portuguese:

ABSTRACT.- Ferro D.G. & Gioso M.A. 2009. [Clinical study of effectiveness of an Anorganic Bone Matrix and Cell-Binding Peptide (ABM/P-15), PepGen-P15®: Application in advanced periodontal lesions of dogs.] Estudo clínico da aplicação de matriz inorgânica de osso associado a peptídeo sintético de adesão celular (MIO/P-15), PepGen P-15®, em lesões periodontais avançadas de cães. Pesquisa Veterinária Brasileira 29(2):109-116. Laboratório de Odontologia Comparada, Departamento de Cirurgia, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, Av. Prof. Dr. Orlando Marques de Paiva 87, São Paulo, SP 05508-900, Brazil. E-mail: deferro@usp.br The development of biologic modalities designed to enhance bone regeneration and wound healing of specific periodontal sites continues to be a challenge and has been accomplished through the cell binding activity of Type-I collagen. These have been provided by a synthetic cell biding peptide (P-15), associated to a anorganic bone matrix (ABM) to form ABM/P-15. The aim of this study was to evaluate the attachment loss and periodontal pocket response in teeth after 3 and 6 months with ABM/P-15 graft application. Twenty one dogs from the Veterinary Hospital, University of São Paulo, were anesthetized in order to accomplish periodontal treatment and 132 teeth faces with attachment loss were treated. From these, 36.4% (48 faces) received cell binding peptide and 63.6% (84 faces) compounded the control group that received conventional treatment (muco-gingival flap and root planning). The procedure was documented by intra-oral radiography and all periodontal probings were photographed. After 3 and 6 months, the animals were re-anesthetized in order to accomplish new photography, radiography and periodontal probing exams. The 48 attachment loss faces that received graft material exhibited 40% of regeneration rate after 6 months. The control faces did not change their attachment level. The palatal face presented the better regeneration rates (40%) and the canines and molars teeth showed the better responses (57.14% and 65%, respectively). There was no post-surgical infection related to absence of oral home care. It can be concluded that ABM/P-15 helps a more rapidly periodontal structure re-attachment and regeneration, including alveolar bone. Its application was easy and practical, and the post-surgical complications incidence was low. Nevertheless, more work is necessary to evaluate the amount and the quality of formed bone and periodontal ligament.

Abstract in English:

With the aim of determining possible collagen changes in Cara inchada, investigations of gingiva and interdental periodontium of eight diseased and eight healthy calves were performed. Findings included degeneration and loss of superficial layers of marginal and crevicular epithelia and proliferation of the junctional epithelium into the lamina propria, which was infiltrated mainly by eosinophilic granulocytes. The collagen in affected areas was edematous and collagen I was less dense then the surrounding connective tissue, which resembled that of the control specimens. Osteofibtotic changes were observed in the alveolar bone. Cause and effect relationship between the changes in epithelium, connective tissues and alveolar bone are discussed with reference to allergic reactions, the integrity and metabolism of collagen and osteodystrophia fibrosa. The fact that collagen in non-infiltrated parts displayed normal structural and staining ·properties leads to the conclusion that the collagen changes in Cara inchada are of a secondary nature.

• Periodontal disease Cara inchada cattle histology collagen gingiva periodontium

Abstract in Portuguese:

Foram realizados estudos histológicos da gengiva e do periodôncio interdentário de oito bezerros afetados pela "cara inchada" e de oito outros sadios, a fim de verificar possíveis alterações do colágeno nessa doença. As alterações observadas consistiram em degeneração e perda das camadas superficiais dos epitélios marginais externo e interno da gengiva, bem como invasão da lâmina própria, que estava infiltrada principalmente por granulócitos eosinófilos, pelo epitélio juncional. O colágeno nas áreas afetadas encontrava-se edemaciado, e. o colágeno tipo I estava menos denso que o tecido conjuntivo circunvizinho, lembrando o das espécimes de controle. No osso alveolar foram observadas alterações osteofibróticas. As relações de causa e efeito, entre as alterações no epitélio, tecido conjuntivo e osso alveolar, são discutidas em relação às reações alérgicas, à integridade e ao metabolismo do colágeno e à osteodistrofia fibrosa. O fato de que o colágeno, nas partes não infiltradas, estava normal tanto estruturamente como em relação às propriedades tintoriais, leva a concluir que as alterações do colágeno, na "cara inchada", são de natureza secundária.

• Doença peridentária "cara inchada" bovinos histologia colágeno gengiva periodôncio