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Archive | 1979

Fresh immature articular cartilage allografts

Cleber Antonio Jansen Paccola; Camilo André Mércio Xavier; Renato Pinto Gonçalves

SummaryThe integration of immature cartilage allografts to knee joints of both normal rabbits and those submitted to arthritis through papain was studied for a period of up to 9 months.Two types of grafts were compared: chondral—constituted only by cartilage, and osteochondral—cartilage plus a thin layer of subchondral bone.The integration of the grafts was analyzed through inspection of the articular surface and histologic sections.The viability of the grafts was checked through the incorporation of 35SO4 on the chondral matrix.The following conclusions were drawn:(1)A large member of the grafted cartilages were well accepted without histological evidence of immunological rejection, and metabolically active 9 months after transplantation.(2)The chondral graft was found to be superior to the osteochondral one regarding the integration, but both showed tendency to degeneration with time.(3)The presence of arthritis previously induced by papain affected the integration of the grafts causing a higher percentage of degeneration on the grafted cartilage.ZusammenfassungÜber einen Zeitraum bis zu 9 Monaten wurde die Integration unreifer Knorpel-Allotransplantate in den Kniegelenken normaler Ratten und solcher, bei denen mittels Papain Arthritis hervorgerufen wurde, beobachtet.Es wurde ein Vergleich zwischen zwei Transplantatarten aufgestellt: 1. chondralen — bestehend aus nur einem Knorpel und 2. osteochondralen — bestehend aus einem Knorpel plus einer dünnen Schicht aus subchondralem Knochen.Die Integration der Transplantate wurde analysiert durch Inspektion der Gelenkoberfläche und der histologischen Abschnitte.Die Lebensdauer der Transplantate wurde durch Eingeben von 35SO4 in die Knorpelmatrize getestet.Folgende Schlußfolgerungen wurden gezogen:1.Ein Großteil der Knorpeltransplantate wurde gut aufgenommen, ohne histologischen Beweis für immunologische Abwehr, und war metabolisch noch nach 9 Monaten aktiv.2.Das chondrale Transplantat integrierte sich besser als das osteochondrale, beide neigten jedoch mit der Zeit zu Degenerationserscheinungen.3.Die zuvor mittels Papain hervorgerufene Arthritis beeinträchtigte die Integration der Transplantate und rief einen größeren Prozentsatz an degenerierten Knorpeltransplantaten hervor.


Archives of Orthopaedic and Trauma Surgery | 1982

The Use of Decalcified Granulated Homologous Cortical Bone Matrix in the Correction of Diaphyseal Bone Defect

José Batista Volpon; Camilo André Mércio Xavier; Renato Pinto Conçalves

SummaryIn order to investigate an alternative way to correct diaphyseal bone defects, granulated decalcified homologous cortical bone was used as a graft.Because of the suitable anatomic arrangement, the forearm of rabbits was chosen as an experimental model of bone defect. A 2 cm long bone cylinder was removed from the diaphysis of both radii preserving the periosteum. The artificial bone defect was filled with granular decalcified bone on the right side. The left side was used as control and kept empty or filled with undecalcified granular bone.The 18 animals were sacrificed in batches, 3, 6, and 9 weeks after the operation.New bone formation was followed by X-rays, routine histology and incorporation of calcein blue, xylenol orange and tetracycline.In the decalcified granular bone grafts new bone formation was already detected at the first week and 9 weeks after the graft operation there was a well developed cylindric ossicle, in 89% of the cases. In some cases a medullary canal was present.No bone formation was found neither in the empty defects nor in the ones filled with undecalcified granular bone grafts.ZusammenfassungZur Untersuchung einer Alternative für die Auffüllung diaphysärer Knochendefekte wurde homologe Kortikalis als entkalktes Knochengranulat implantiert.Wegen der günstigen anatomischen Bedingungen wurde der Vorderlauf des Kaninchens als experimentelles Modell gewählt. Ein 2 cm langes Knochensegment wurde aus den Diaphysen beider Speichenknochen unter Erhaltung des Periosts reseziert. Am rechten Vorderlauf wurde der künstliche Knochendefekt mit entkalktem Knochengranulat aufgefüllt. Auf der linken Seite wurde zur Kontrolle der Defekt leer gelassen oder mit unentkalktem Knochengranulat aufgefullt.Die Tiere wurden gruppenweise 3, 6 und 9 Wochen nach der Operation getötet.Die Knochenneubildung wurde im Röntgenbild, durch Standard-Histologie und durch Markierung mit Kalzein-Blau, Xylenol-Orange und Tetracyclin überprüft.In den Implantaten aus entkalktem Knochengranulat wurde bereits in der ersten Woche Knochenneubildung festgestellt und nach 9 Wochen fand sich in dem Defekt ein gut entwickeltes zylindrisches Knochenregenerat in 89% der Fälle. In einigen Fällen war sogar eine Markhöhle vorhanden.Aber auch in den Defekten, die leer gelassen oder mit unentkalktem Knochengranulat aufgefüllt worden waren, ließ sich Knochenbildung erkennen.


Revista De Saude Publica | 1978

Incidência de fraturas, exceto de crânio, no município de Ribeirão Preto, SP (Brasil) nos anos de 1969 - 1970: I - Distribuição segundo a causa externa, tempo e lugar de ocorrência

Camilo André Mércio Xavier; José da Rocha Carvalheiro

The incidence of fractures in the county of Ribeirao Preto in the state of Sao Paulo, Brazil was analyzed in 1969 and 1970. The annual fracture rates were 13.50 and 12.72 per 1,000 residents, respectively. Falls were the main cause of fracture cases (41.6% in 1969 and 51% in 1970). Regarding other eventualities, fractures resulting from traffic accidents were less common than those of industrial origin. In relation to the place of accident, the majority of fractures occurred in the street. However, if we consider residential and peridomiciliary accidents together, they exceed the number of street accidents. There was no special month predominance in both years of the survey. Sundays showed slight excess in number of fracture cases. Afternoon is by far the time of greater occurrence of fractures.Descreve-se a incidencia de fraturas, exceto de crânio, na populacao residente no municipio de Ribeirao Preto, SP, Brasil, nos anos 1969 e 1970. Observaram-se, nesses anos, 2.635 e 2.709 fraturas, respectivamente, correspondendo a coeficientes de 13,50 e 12,72 por 1.000 habitantes. As quedas representaram a causa externa mais frequente, com 41,6% em 1969 e 51,0% em 1970. O ambiente familiar (residencia e peri-domicilio) e o local de ocorrencia da maioria das fraturas. O periodo vespertino e aquele em que se da a maioria dos acidentes que, embora tenham uma leve tendencia de concentrar-se ao redor do domingo, nao parecem exibir um padrao uniforme em funcao da epoca do ano.


Archives of Orthopaedic and Trauma Surgery | 1979

Fresh immature articular cartilage allografts. A study on the integration of chondral and osteochondral grafts both in normal and in papain-treated knee joints of rabbits.

Cleber Antonio Jansen Paccola; Camilo André Mércio Xavier; Renato Pinto Gonçalves


Revista Brasileira De Ortopedia | 1989

Microdensitometria em radiografias de perfuraçöes osseas

Mário Jefferson Quirino Louzada; José B. Portugal Paulin; Camilo André Mércio Xavier; Victório Valeri


Archives of Orthopaedic and Trauma Surgery | 1982

The use of decalcified granulated homologous cortical bone matrix in the correction of diaphyseal bone defect. An experimental study in rabbits.

Jos B. Volpon; Camilo André Mércio Xavier; Renato Pinto Conalves


Revista Brasileira De Ortopedia | 1991

Banco de osso: organizaçäo e utilizaçäo clínica no Hospital das Clínicas da FMRP/USP

Helton Luiz Aparecido Defino; Carlos H. Flora de Castro; Eder Balliari; Nei Campelo Cabral; Cleber Antonio Jansen Paccola; Camilo André Mércio Xavier


Archives of Orthopaedic and Trauma Surgery | 1979

A Study on the Integration of Chondral and Osteochondral Grafts Both in Normal and in Papain-Treated Knee Joints of Rabbits

Cleber Antonio Jansen Paccola; Camilo André Mércio Xavier; Renato Pinto Gonçalves


Revista Brasileira De Ortopedia | 1994

Uma variaçäo do acesso cirúrgico lateral direto ao quadril: estudo em cadáver

Ronaldo S Lima; Camilo André Mércio Xavier; José Batista Volpon


Revista Brasileira De Ortopedia | 1987

Embolia gordurosa: apresentaçäo de caso

Helton Luiz Aparecido Defino; Gláucia M Landell; José Barbieri Neto; Camilo André Mércio Xavier

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Fernando Milton da Cunha

Universidade Federal de Minas Gerais

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Guaracy Carvalho Filho

Faculdade de Medicina de São José do Rio Preto

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