Assuntos
Infecções Oportunistas Relacionadas com a AIDS/diagnóstico , Infecções Oportunistas Relacionadas com a AIDS/epidemiologia , Programas de Rastreamento/métodos , Avaliação das Necessidades/organização & administração , Toxoplasmose/diagnóstico , Toxoplasmose/epidemiologia , Infecções Oportunistas Relacionadas com a AIDS/prevenção & controle , Adulto , Côte d'Ivoire/epidemiologia , Estudos Transversais , Feminino , Humanos , Masculino , Programas de Rastreamento/economia , Vigilância da População , Estudos Soroepidemiológicos , Toxoplasmose/prevenção & controleRESUMO
We report here the results of a histological assessment of the initial healing response following implantation into the dog mandible of a porous-surfaced, titanium alloy endosseous dental implant. Two implants were placed in edentulous areas on each side of the mandible of each dog and covered with a full-thickness mucoperiosteal flap. The implant sites on one side of the mandible were allowed to head for four weeks, while those on the other side were allowed to head for eight weeks before the animals were killed. Histological specimens were obtained and assessed both qualitatively and by computer-assisted morphometry. All but one of the 24 implants were well-tolerated and healed with a variable ingrowth of bone into the porous-surface geometry. The histomorphometric measurements revealed that bone ingrowth had reached a plateau by four weeks of initial healing.
Assuntos
Processo Alveolar/anatomia & histologia , Ligas Dentárias , Implantação Dentária Endóssea , Titânio , Ligas , Processo Alveolar/fisiologia , Animais , Computadores , Tecido Conjuntivo/anatomia & histologia , Tecido Conjuntivo/fisiologia , Implantação Dentária Endóssea/instrumentação , Implantação Dentária Endóssea/métodos , Planejamento de Dentadura , Cães , Feminino , Aumento da Imagem , Mandíbula/anatomia & histologia , Mandíbula/fisiologia , Mandíbula/cirurgia , Osteogênese , Propriedades de Superfície , Fatores de Tempo , CicatrizaçãoRESUMO
A new endosseous dental implant system incorporating a porous-surface geometry with a tapered, truncated-cone shape was placed bilaterally in edentulous areas of dog mandibles in a two-stage procedure. All implants had been stabilized by bone ingrowth by the time of the second procedure (insertion of a transgingival collar and implant-supported bridge). The transgingival collar had a porous-surface geometry on its apical one-third, and was meant to encourage gingival connective tissue ingrowth and attachment, but in fact provided an excellent milieu for bacterial contamination. As a consequence, many of the implants showed clinical and radiographic signs of impending failure by eight months. Only those implants for which the porous coat, including that of the transgingival collar, was completely submerged in bone were observed to be successful. This study reports on the radiographic and clinical assessment of this implant system in dogs during the period of function.
Assuntos
Processo Alveolar/anatomia & histologia , Ligas Dentárias , Implantação Dentária Endóssea , Titânio , Ligas , Processo Alveolar/diagnóstico por imagem , Animais , Reabsorção Óssea/diagnóstico por imagem , Reabsorção Óssea/patologia , Implantação Dentária Endóssea/instrumentação , Implantação Dentária Endóssea/métodos , Índice de Placa Dentária , Planejamento de Dentadura , Prótese Parcial Fixa , Cães , Feminino , Masculino , Doenças Periodontais/diagnóstico por imagem , Doenças Periodontais/patologia , Índice Periodontal , Radiografia , Propriedades de SuperfícieRESUMO
1. The safety of a carbon haemoperfusion column, Haemocol, has been studies in beagle dogs. 2. only minor changes in physiology, haematology and plasma chemistry were detected, except those associated with an improvement in clinical status. 3. It is concluded that haemoperfusion through this column is a safe and simple procedure, which merits evaluation in the treatment of severe drug overdose in man.