Oriental medicine has its basis upon the channels and collaterals which affect the vital energy and the blood stream. Therefore, it is understood that pathology in a part of the body may pass through the channels and collaterals, and affect other parts of the body.
The etiologies of TMJ arthrosis are multifactorial and primary etiologies may be classified in three types of origins : occlusion or the mandibular displacement, temporomandibular joints, and the muscles. Furthermore, there are secondary etiologies that originate from psychological stress and abnormalities in the neuromuscular system. Those diseases caused by the secondary etiologies (endogenous) may well be treated by applying the Oriental medicine rather than using conventional western medicine. Authors have carried out the diagnosis of TMJ arthrosis by means of the Ryodoraku method (by Nakaya) which performs objective diagnosis of the excitation and congestion of the vital energy in 12 extra points of channels and collaterals by measuring the values of electric resistance of the skin.
The original Ryodoraku method was developed by Nakaya and the analysis is performed on the patient's data for the Ryodoraku syndrome. However, there is very little report for the oral region in this method and no research concerning TMJ arthrosis was introduced. Authors have studied the features of the electric resistance values of the skin of the patients who claimed the dental pain, trigeminal neuralgia, and teeth missing having been left unrestored for a long period of time.
The purpose of this study was to examine the patients with TMJ arthrosis and inspect 12 extra points of channels and collaterals if there was a tendency of increasing electric current in the channels of the liver. According to the results, it was found that there exists greater current on the affected side than on the healthy side. In addition, it was found that the value of this electric current returns to its normal value, when the symptoms of the disease are relieved.

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Four commercial cold-curing resins including three pattern resins (G.C Pattern Resin, Product D, and Product P) and one repair resin (G.C Uni-Fast) were subjected to dimensional stability test. The problems of dimensional accuracy of cold-curing resin is two-fold. It depends upon the amount of setting shrinkage and duration of setting (complete setting time) .
The purpose of this study was to determine complete setting time when resin does not show any dimensional change and to measure the amount of distortion during setting. The results may be summarized as follows:
1. Different amount of shrinkage was observed between two tests. Dimensional change of the resin in oral condition (37°C) was approximately 0.08% greater than that in ambient condition (23°C) . This difference may be due to the effect of thermal shrinkage.
2. Shrinkage of the resin was observed after removing a set pattern from a mold. This may be caused by relaxation of internal stress.
3. The complete setting times in ambient condition (23°C) and oral condition (37°C) were determined for each of the resins. In ambient condition, G.C Pattern-Resin sets completely in about 15 minutes and others set in 60 minutes. In oral condition, G.C Pattern Resin sets completely in 10 minutes and others set in 30 minutes.
It is concluded in this study that the G.C Pattern Resin sets in the shortest time with the least amount of shrinkage among the resins tested. Thus, G.C Pattern Resin may be effectively applied for the fixation of assembled parts of prosthetic appliances and the fabrication of resin crasp patterns and resin copings for removable partial denture frame.

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Two methods fabricating connectors of fixed bridge restorations are commonly employed. Connector of one-piece cast bridge carries several advantages such as resistance to tarnish and corrosion, strength, and simple laboratory procedure. This method, however, is used in the limited cases for the bridge construction. Since it is cast, its indication is restricted for the bridge consisting only one type of alloy. Furthermore, the fit of the one-piece cast bridge depends upon the casting accuracy. As is known, excellent marginal integrity is awfully difficult to obtain when dealing with multiretainer prosthesis.
Soldering method is the alternative to one-piece cast method and is more commonly employed for the bridge connector construction presently. This method affords several advantages to onepiece cast method. All combinations of the types of alloys may be used in a bridge fabrication. The strength of the connector is secured unless improper design or undue oxidization of the soldering surfaces are provided. Dimensional accuracy of the connector is reported to be acceptable. In addition, soldering method allows better esthetic control than one-piece cast does when fabricating anterior bridge connectors.
The purpose of this article is to review the studies concerning accurate soldering procedures and to discuss clinical applications of those.

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Maintaining vertical dimension is the most significant consideration as the restorations are fabricated. If the occlusals of the posteriors including premolars and molars are reduced at the same time, vertical dimension may be lost easily and it is realized by the operator that the further reduction may be required to obtain the necessary amount of occlusal space between the maxillary and mandibular posteriors. This undue loss of vertical dimension does not occur if some molars are left unprepared and occlude at the proper level of vertical dimension.
This article reported how to maintain occlusal position without altering vertical dimension throughout the whole procedures of fabrictation of the posterior restorations. The method is designated as“Tetra point occlusal technique.”and is effectively applied in fabricating the posterior prosthesies or free-end removable partial dentures.

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Excellent harmony and balance of posture is a nature talent given to human being. In the previous article, it was reported that imblance of the body posture and the abnormal occlusion were closely linked. The main aim of this article is to report various malocclusion cases that are treated by correcting the posture of the body. These cases may not seem to concern with dental field at a glance, however, are closely related to our field, as a matter of fact.
It is a marvellous experience for the dentist that he can relieve symptoms of headache, soreness or tenderness of neck and shoulder, rumness or paralisis of hands and filters, high blood pressure, and so on by treating malocclusion.
Treatment of dental occlusion and mandibular displacement in conjunction with body posture is a new field of medicine which is neither western medicine nor oriental medicine. The author reports the outline of occlusal and posture treatment as the third medicine that deals with symptoms and diseases not being cured by other two authentic medicine.

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