“Cerec”system that is a system of automated fabrication of ceramic restorations based on CAD/CAM will be introduced. The International Dental Academy introduced this sysyem in November 1992. Since then the Academy has been using “Cerec” in clinical practice and has been providing simulation exercise courses. In this paper the clinical procedure to fabricate porcelain inlay with use of this system will be explained. The adhesion method which is used by the author et.al will be also introduced.

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This paper will discuss how a mechanical pantograph is used for clinical diagnosis based on actual cases.
The pantograph was effective in making diagnosis and observing prognosis in each case. However, a definitive diagnosis cannot be made with a pantograph alone. It is necessary to make a rational diagnosis by combining it with clinical symptoms and various other test results. Objective judgements should be made based on the latest knowledge of occlusion and clinical experience in interpreting the recorded lines.
Pantographs and other mandibular movement recording and analyzing systems should be used more widely to recognize each individual patient's occlusal characteristisc, so that prosthetic treatment in harmony with those characteristics can be provided and maintained. Pantographs were devised and modified as a result of the painstaking efforts by our predecessors. With the advancement of electronics, mandibular movement recording and analyzing devices are making a major progress. The oclusal diagnosis using these device which have a long history needs to be further systematized into a scientific discipline.

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Gothic arch has been used to determine a horizontal mandibular position and adjust condylar paths of an articuator by taking a check bite.
With the aging of the society, the number of edentulous patients with mandibular dysfunction will continue to increase. The author examined the temporomandibular joints of 40 edentulous patients over a period of 5 years. 34 of them were found to have dysfunction. Their mandibular functions were evaluated by examining their Gothic arch tracings and relationship between the spaces and tapping points, which will be discussed from a clinical viewpoint.

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