The researchers in this study set out to do just that by investigating what goes wrong with people's permanent dental prostheses in Libya. One hundred patients from the clinic in Gharyan, Libya, who had come in complaining of problems with their fixed dental prostheses were included in the study, and the reasons for their failure were categorized using Manappallil's system. Failures in Class 3 accounted for 30% of all failures, Class 4 for 24%, Classes, 2, and 4 for 8%, Classes 5 and 6 for 15%, and Class 6 for 11%. Class 1 for 8%, Class 2 for 12%, Class 4 for 24% Class 5 for 15 % and Class 6 for 11%. Unserviceable restorations due to poor margins were indicated as the most common cause of failure in class 3 failures in the current study. Keywords: Rehabilitation, Fixed partial dentures, Failure classification, success

Abstract

 In recent years, there has been much emphasis and motivation for teaching at schools of different levels to move from the traditional way of teaching “chalk and talk‟ to a more creative and innovative teaching methodology. In this paper, it has been defined the creative thinking and its hidden meaning, also it has explained the creativity as a process which has included four kinds (fluency, flexibility, originality, elaboration). Likewise, it has been mention some barriers that prevent the students of the creative thinking that has divided into three kinds of blocks (perceptual blocks, emotional blocks and cultural blocks). Furthermore, some stimulated strategies and techniques have been explainedd in order to enhance and support using creative thinking of young students. In addition , distinct types of media which have been involved in modern teaching techniques in order to create more creative thoughts which may be helpful in improving the creative thinking of young students. Moreover, some facts about how to prepare for the age of modern teaching technology have offered. Some remarkable examples: encourage students to use different computer programs, electronic mail, databases in their research or ask and answer of their varied questions. The importance of this paper has been embodied in the following: It gives opportunity to influence the personality of teachers to improve their traditional methods of teaching and it is an attempt to change the ministry of education’s policies relating to the current curriculum , in order to move forward more understanding and creative thinking of the information more than memorization.