Hesham Khalil

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In this article we give a detailed presentation of state event logic which is a modal logic for reasoning about concurrent events and causality between events 8]. State event logic diiers from previous approaches in the following directions: First, events enjoy the same attention as states. In the same way as states can be viewed as models of the formulae(More)
BACKGROUND The purpose of this study was to investigate the reasons for and patterns of extraction of permanent teeth in a subset of the Saudi population. METHODS During a 3-month period, dentists were asked to record, using a specially designed survey form, the reasons for every extraction of a permanent tooth. The reasons for tooth extraction were(More)
BACKGROUND Warfarin is one of the most common oral anticoagulants used to prevent thromboembolic episodes. The benefits of discontinuation of this drug before simple surgical procedures are not clear and this approach could be associated with complications. The aim of this study was to evaluate the risk of bleeding in a series of 35 patients (in cases where(More)
BACKGROUND The purpose of this study is to determine the type and frequency of pathological conditions around third molar teeth among randomly selected patient's records in Oral and Maxillofacial Surgery, College of Dentistry, King Saud University, Riyadh. MATERIALS AND METHODS Totally, 281 patient panoramic radiographs were selected with detectable(More)
Dental implants have been used in a variety of different forms for many years. Since the mid-20(th) century, there has been an increase in interest in the implant process for the replacement of missing teeth. Branemark was one of the initial pioneers who applied scientifically based research techniques to develop an endosseous implant that forms an immobile(More)
The inferior alveolar nerve block is the most common injection technique used in dentistry and many modifications of the conventional nerve block have been recently described in the literature. Selecting the best technique by the dentist or surgeon depends on many factors including the success rate and complications related to the selected technique.(More)
  • Hesham Khalil '& $ % '& $ % ? Forschungsbericht, Hesham Khalil
  • 1997
This paper presents a version of the Situation Calculus with improved capabilities in formalizing and reasoning about nondeterministic actions. Instead of describing the eeects of such actions by posting constraints on their possible outcomes , as is typically done in the common Situation Calculus, we provide means of describing actions by the set of their(More)
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