Background and aim: According to the frequent tooth loss at molar sites and necessity to replace them, the purpose of this study was to evaluate the short term clinical and radiographic outcomes of fresh molar sockets immediately implanted, with tapered Wide platform implants.Materials and Methods: 10 patients with the mean age of 46 were treated with the immediate implantation of 12 Wide diameter and Wide platform implants in the molar sites.Following the atraumatic extraction of molars and preservation of the interradicular septum, implantswere placed. Immediately after the insertion of healing abutment, implant primary stability was tested with the Periotest and the crestal bone level was estimated with the periapical long-cone radiographs.Four months later patients were recalled for final evaluations, the crestal bone loss was measured and the periotest values were judged with the Wilcoxon test.Results: All 12 implants were reported with no pain, infection and continuous radiographic lucency.The average PTV1 and PTV2 reported were -4.9±0.99 and -4.6±1.37 (-2 to -7).The difference between PTVs wasn' t statistically significant (P>0.05).The average crestal bone loss was 0.54±0.96.Conclusion: Successful results were achieved with Wide diameter and Wide platform implants with the appropriate case selection and surgical technique.

Background and Aim: Considering the important role of molars in masticatory function and in order to prevent rapid residual ridge resorption in the postextraction phase, it is necessary to replace these teeth in an appropriate way as soon as possible. This study was conducted to evaluate the outcome of immediate tapered Wide platform implants instead in molar sockets one year following loading in a private clinic in year 1388- 89.Materials &Methods: This descriptive study was carried on 12 samples of first and second molars of 10 patients with average of 46±4.71 years, which had referred on year 1387. Immediately after extraction, tapered platform implants were placed. One year following loading, the stability of implants was evaluated by means of periotest. Clinical evaluation was based on: pain, infection and pus drainage. In order to determine crestal bone changes parallel periapical radiographs were taken. Data were analyzed by t- test.Results: None of the samples showed pain, infection, pus drainage or continues radiolucency. The average PTV (Perio Test Value) was -2.81±1.6 with average of -1 to -6 was indicator of no mobility in implants. The average crestal bone change was 0.22±0.01 mm.Conclusion: Installation of tapered Wide platform implants at the time of molar extraction maybe successful with ideal case selection and proper surgical procedure.

In this paper, a new ultra Wide band (UWB) filter with Wide stop band, based on metamaterial structures is presented. At first, a new metamaterial unit cell including interdigital capacitor and short-circuited stub is repented. inductance and decreasing the right handed capacitance of the structure, two stable poles in the unit cell, which called resonator, are produced. Finally, by cascading five introduced resonators, an UWB filter with pass band from 2. 8 GHz to 13. 2 GHz and stop band from 14. 7GHz to17 GHz is presented. The total size of the proposed filter is 30mm 8. 85mm so that its size is more smaller in comparison with many other existing UWB filters.

Current differential based Wide area protection (WAP) has recently been proposed as a technique to increase the reliability of protection systems. It increases system stability and can prevent large contingencies such as cascading outages and blackouts. This paper describes how power differential protection (PDP) can be used within a WAP and shows that the algorithm operates correctly for all types of system faults whilst preventing unwanted tripping, even if the data has been distorted by CT saturation or by data mismatches caused by delays in theWAP data collection system. The PDP algorithm has been simulated and tested on an Iranian 400kV transmission line during different fault and system operating conditions. The proposed operating logic and the PDP algorithm were also evaluated using simulation studies based on the Northern Ireland Electricity (NIE) 275 kV network. The results presented illustrate the validity of the proposed protection.