Cephalometric Analysis of the Velopharyngeal Function

The cephalometric analysis of the velopharyngeal function in terms of the shape and mobility permits quantitative assessment of velopharyngeal insufficiency, contributing to decision making of the therapeutic plan

Assessment of Palatal Fistula Repair Using a Conchal Cartilage Graft

The result of Palatal fistula repair surgery in thirteen patients were assessed. In the present study all of the conchal cartilage implants produced results that were fair or good. The result of using cartilage is satisfactory compared to our previous study. The Usefullenss and advantages of conchal cartilage graft for repair of palatal fistula were discussed. The success of this operation summarized as follows, : 1) Excision of an adequately large conchal cartilage with perichondrium, 2) Air tight shield fixation, 3) Through to Through mattress suturing, 4) Covering the implanted cartilage

XPS characterization of the surface oxide film 316L stainless steel samples that were located in quasi-biological environments

The purpose of this study was to characterize the surface oxide films on 316L austenitic stainless steel located in various environments to estimate the reconstruction of the film in human body. Five kinds of specimens were prepared according to the following methods: polished in deionized water, autoclaved, immersed in Hanks' solution, immersed in cell culture medium, and incubated with cultured cells. X-ray photoelectron spectroscopy (XPS) was performed to estimate the compositions of the surface oxide film and substrate and the thickness of the film. Surface oxide film on 316L steel after polished in water consists of iron and chromium oxides containing small amount of nickel, molybdenum, and manganese oxides. The surface oxide contained a large amount of OH − . Calcium phosphate was formed on/in the film after immersion in the Hanks' solution and medium and incubated with the cells. Sulfate is adsorbed by the surface oxide film and reduced to sulfite and/or sulfate in cell culture medium and with culturing cells. The results in this study suggest that nickel and manganese are depleted in the oxide film and the surface oxide changes into iron and chromium oxides containing a small amount of molybdenum oxide in human body