RESUMO
Dr. William Ben Johnson introduced the contemporary use fo core-carrier technology for root canal obturation in the late 1970s. This technology has undergone multiple enhancements since its commercial introduction in the early 1990s and has provided a unique clinical treatment regimen for clinicians globally. However, the very roots and evolution of this technique can be traced to the later 1800s, exhibiting a torturous and fragmented history until Dr. Johnson's creativity and impetus brought it the the forefront of root canal obturation techniques. Dr. Johnson received the Inventor of the Year award in Oklahoma for these innovative accomplishments.
Assuntos
Guta-Percha/história , Materiais Restauradores do Canal Radicular/história , História do Século XIX , História do Século XX , Humanos , Oklahoma , Obturação do Canal RadicularAssuntos
Guta-Percha/uso terapêutico , Materiais Restauradores do Canal Radicular/uso terapêutico , Obturação do Canal Radicular/métodos , Fenômenos Químicos , Cavidade Pulpar/anatomia & histologia , Restauração Dentária Permanente , Adesivos Dentinários/química , Guta-Percha/química , Guta-Percha/história , História do Século XVII , História do Século XIX , História do Século XX , Humanos , Fenômenos Mecânicos , Transição de Fase , Materiais Restauradores do Canal Radicular/química , Materiais Restauradores do Canal Radicular/história , Autocura de Resinas Dentárias/métodos , Propriedades de Superfície , Temperatura de TransiçãoRESUMO
Among all the publications of the hundred-years-old Fogorvosi Szemle, there are only a few that deal with dental materials relative to other areas of dentistry. However, even this small number of articles reveals the change and advancement of dental materials and technologies.
Assuntos
Materiais Dentários , Jornalismo em Odontologia/história , Publicações Periódicas como Assunto/história , Ligas Dentárias/história , Revestimento para Fundição Odontológica/história , Cimentos Dentários/história , Implantes Dentários/história , Materiais para Moldagem Odontológica/história , Materiais Dentários/história , Porcelana Dentária , Estética , História do Século XX , História do Século XXI , Humanos , Hungria , Resinas Sintéticas/história , Materiais Restauradores do Canal Radicular/históriaRESUMO
Twenty-five silver cones were removed from teeth which had been treated endodontically from 3 months to 20 years previously. Examination by the scanning electron microscope revealed that these cones were moderately to severely corroded. The corrosion patterns were described as ranging from pitting to deep crater formation with globular or spherical agglomerations. Examinations with the electron probe showed sulfur peaks on the corroded portions of the cones. X-ray diffraction analyses indicated that the chemical compounds formed were silver sulfides, silver sulfates, silver carbonates, and silver amine sulfate amide hydrates. Tissue culture studies indicated that the corrosion products were highly cytotoxic. The mechanisms for the formation of the corrosion products have been postulated as being due to plastic deformations and metal transfer to the silver cones, plus contact of the silver with tissue fluids.
