future increase of mobile communication subscribers will require a great capacity expansion of the cellular systems. in order to accommodate the increasing number of subscribers, the cell size will have to be much smaller than current size. therefore, it is predictable that the location updating and paging procedures will produce a major part of signaling traffic in these networks. this pape...

Background: The location of the endodontic perforation has shown a strong correlation with healing process and successful outcome. aim this study was to determine prevalence iatrogenic perforations according their affected root surfaces. Materials methods: Over period 7 years, 100 cases were recorded from digital radiographs each case. classified following criteria: (1) – cervical, furcation,...