Immediate Surgical Repositioning Following Intrusive Luxation: A Case Report and Review of the Literature

This report presents a case of severe intrusive luxation of mature maxillary lateral incisor in a 10-year-old boy. The intruded tooth was immediately repositioned (surgical extrusion) and splinted within 2 h following injury. Tetracycline therapy was initiated at the time of repositioning and maintained for 10 days. Pulp removal and calcium hydroxide treatment of the root canal was carried out after repositioning. Splint was removed 1 month later. Definitive root canal treatment with gutta percha was accomplished at the second month recall. Clinical and radiographic examination 28 months after the surgical extrusion revealed satisfactory apical and periodontal healing

Effects of Postannealing Process on the Properties of RuO2 Films and Their Performance As Electrodes in Organic Thin Film Transistors or Solar Cells

RuO2 films were deposited on SiO2 (300 nm)/N++Si substrates using radio frequency magnetron sputtering at room temperature. As-deposited RuO2 films were annealed at different temperatures (100, 300, and 500 degrees C) and ambients (Ar, O-2 and vacuum), and the resulting effects on the electrical and physical properties of RuO2 films were characterized. The effect of annealing atmosphere was negligible, however the temperature highly influenced the resistivity and crystallinity of RuO2 films. RuO2 films annealed at high temperature exhibited lower resistivity and higher crystallinity than as-deposited RuO2. To investigate the possibility to use RuO2 film as alternative electrodes in flexible devices, as-deposited and annealed RuO2 films were applied as the source/drain (S/D) electrodes in organic thin film transistor (OTFT), catalytic electrodes in dye sensitized solar cell (DSSC) and as the hole-injection buffer layer (HIL) in organic photovoltaic (OPV). Except for OTFTs (mu approximate to 0.45 cm(2)/(V s) and on/off ratio approximate to 5X 10(5)) with RuO2 S/D electrodes, the DSSC and OPV (3.5% and 2.56%) incorporating annealed RuO2 electrodes showed higher performance than those with as-deposited RuO2 electrodes (3.0% and 1.61%, respectively)clos