Three laboratory methods are available for the diagnosis and assessment of dental and dentofacial changes that have occcurred due to physiological growth of asubject on one hand and to the effects of any orthodontic treatment given him on the other hand. These are the facial photogrammetry, cephalometric radiography and oriented plaster models of upper and lower jaws. Although each of these methods has its own merit in the study of dental and dentofacial changes, there has hardly been any attempt to correlate sets of data obtained by these methods and bring them into a more integrated system which would possibly furnish more convenient and reliable criteria in diagnosing the orthodontic patients. As an approach to get some informations about such correlation among the three methods, three sets of measurements were respectively made on a total of 149 subjects aged 6 to 20, consisting of 71 males and 78 females, all having nomal occlusion and being the residents of Kitakyushu. FH planes as obtained in the respective method were taken as principal reference in all measurement. The relative distances or depths of points on the FH plane that were obtained by projection from the selected landmarks in the soft and hard tissues of the face were compared and assessed among the three methods. For the purpose of gaining a general trend of age change in the soft and hard tissues of the face, a series of profilograms were constituted for 5 age stages groups covering 6 to 20 years of age for both sexes, utilizing the facial photogrammetry and cephalometric radiographic data. In making the pictures, FH plane was taken as X axis and a vertical line passing porion as origin was taken as Y axis. Followiug conclusions were drawn from the above studies. 1) Of the dental and dentofacial growth as revealed by the three methods, it was particularly noted that the increments measured by the facial photogrammtry proved least as compared to those measured by the remaining methods. This represented that the growth increment in the soft tissues was exceeded by that in the hard tissues. 2) For the determination of upper jaw positions of cephalometric radiography and plaster model on oriented photogrammetry, centrale and subnasale are so far adopted conveniently as reference points. For the determination of lower jaw position, there is sulcus mentolabialis available as reference point. Of these, centrale was found in the present study to be more accurate point of reference in determining the upper jaw position on facial photogrammetry, because the former could be placed more close to the forward limit of upper jaw than the latter. However, in determining the anteroposterior relation of both jaws on facial photogrammetry, subnasale was found to serve as more accurate point of reference in upper jaw, because the growth change of soft tissue thickness at the site of sulcus mentolabialis closely resembled that at the site of subnasale. 3) Comparison of data as obtained from measurement by both cephalometric rabiography and plaster model revealed that the forward inclination of central incisors was accompanied by the increment of distances between the basal bone and gum and between gum and tooth root apices in both upper and lower jaws of subjects except for those in the stage of deciduous dentition. 4) In subjects older than those having deciduous dentition, the increment by growth of upper jaw as measured by cephalometric radiography was approximately equal to the increment as measured by oriented plaster model.

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The fluctuation of peripheral temperature of the patient under general anesthesia has been detected only by human sense or experience, and little has yet been studied quantitatively. The authors made an investigation on the fluctuation of temperature of the patients under general anesthesia by thermistor-thermometer. The results obtained are as follows : 1. In case of the children under ether anesthesia, the central temperature tends to rise in the course of time whereas the peripheral temperature tends to remain low. 2. In case of the adults under penthrane anesthesia, the fluctuation of central temperature is not remarkable whereas the peripheral temperature tends o descend in the course of time.

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On the present paper, preliminary experiments on the effects of cold-working upon the strainaging of Co-Cr alloy wires were performed. Each wire has the same constitution but different diameter. The author, in fact, estimated the effects of the amount of cold-working upon their mechanical properties at various temperatures of annealing for one hour. Results obtained were as follows : 1. It was found that the peak of hardening appeared by annealing at about 500℃. 2. The larger was the amount of cold-working, the more increased the aging effect. 3. Consepuently, this treatment may be recommended for the prosthetic application of the fine wires.

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A nerve histological study was conducted on the experimental harelip suture operated on artificially prepared defects in upper lips of dogs. I. General Histological Findings Lining of the mucous epithelia was observed to occur slightly earlier than that of the dermal epithelia, although such time difference was negligible. In the primary stage of healing of the suture, there were deposits of blood clots intervening between the incised tissues, which were soon replaced by the granulation tissues leading to wound healing by the scar formation. There was not observed any hair root nor sebaceous gland regenerated in the scar tissue, except for some muscle fibers regenerated. II. Regeneration and Redistribution of Nerve Fibers By the 3rd day of operation, there was already observed in the blood clots as well as in the young granulation tissues development of immature blood vessels and redistribution of vegetative nerve fibers. Such an early appearance of vegetative nerve fibers in the blood clots before they turned into granulation tissues would suggest that the nerve fibers play an important role in conjunction with blood vessels in promoting healing of the wound. These vegetative nerve fibers, however, became decreased in number with lapse of time after the operation and the number of sensory nerve fibers became increased.

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