Although clinical changes were not observed in the contacts of the anterior teeth during edge-to-edge occlusion, when centric position was established during attempts to improve the position of the mandible, serious systemic symptoms that has continued for several years were eliminated and it was possible to return the patient to a healthy life. Two years after treatment it was found when investigations were carried out that there was a change in the reproduction of the position of the mandible in the subject due to changes in the centric position guidance method.
When the joint operates in an environment where the condyle is very mobile, it is desirable to first stabilize the condyle and then select a method that does not apply force on the condyle when taking the interocclusal registration. With the understanding that the position of maximum intercuspation is a dynamic balancing condition, I feel that a mandibular position permitting the maximum allowable changes in pressure while the condyle is in the fossa makes a very important contribution when adjusting the temporomandibular joint and centric relation, as well as when occlusion achieves a physical and psychological balance.

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Severe inflammation, deep periodontal pockets and multiple abscess formation often occur in diabetic patients with poor oral hygiene. Also, the distribution and severity of local irritants affect the severity of periodontal disease in diabetes.
The patient was a 63-year-old Japanese female who came to periodontics department of Nihon University Dental Hospital. Periodontal examination revealed abundant plaque accumulation, multiple abscess formation and diastema. The patient was diagnosed as having a generalized moderate to severe adult periodontitis with secondary occlusal trauma. Since the blood test showed high blood glucose level (311 mg/dl), she was referred to a physician to treat diabetes.
Comprehensive periodontal treatment was prepared to create a well-functioning dentition in a healthy periodontal environment. Non-surgical periodontal therapy including local drug (mino-cycline) delivery system was basically selected to reduce gingival inflammation considering about age and diabetes. Occlusal therapy using modified Hawley appliance was performed to correct diastema after inflammation reduction phase.
This case report was presented to demonstrate the importance of fundamental concept of periodontal therapy and suggested that the combination therapy was effectively to correct diastema in periodontal diseased patient with diabetes. Periodontal condition has been within normal limit after active therapy. Her blood glucose level has been decreased (110 mg/dl) after diabetic treatment. The patient has been in maintenance therapy to keep periodontal health.

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In recent years the general public has been requesting a higher degree of esthetics in their dentistry. Although the porcelain fused to metal crown is currently the most widely used esthetic Coronal restoration technique, it still has various problems and research is continually being carried out. For several years castable ceramics which use no metal at all have received considerable attention as a means of recreating the feeling and shade of natural teeth. It is possible to use castable ceramics for inlays, onlays and laminate veneers.
In adition to introducing Dicor castable ceramics in this paper, I would like to explain the general techniques by making use of actual cases. I hope this will be of use to other doctors in understanding the possibilities of these esthetic Coronal restrations.

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