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Longterm Commercial Trade under the Soviet New Economic Policy
No full textPdepartmental bulletin pape
下顎小臼歯部過剰歯と文献的検討
Get PDFapplication/pdfWe report a 26-year-old Japanese female with a supernumerary tooth in the right and left premolar regions of the mandible. In addition, we compared this case with cases reported by other researchers of the same supernumerary tooth. These bilateral teeth erupted lingually between the second premolar and first molar in the mandible. They were perfectly erupted. Their crown color resembled that of permanent teeth and their roots were fully formed. X-ray examination revealed clear pulp cavities. Morphologically, these supernumerary premolars resembled permanent premolars. These teeth were smaller than the patient's own premolar teeth. Although erupted supernumerary teeth can be found in any region of the mandible, the frequency of occurrence differs from region to region. However, this case, with bilaterally symmetrical supernumerary teeth in the lower premolar regions of an adult female, rarely occurs in permanent dentition.journal articl
Calcium Entry through Voltage-Dependent L-Type Calcium Channels in Preosteoblastic MC3T3-E1 Cells
Get PDFapplication/pdfThis study was undertaken to confirm that there are voltage-dependent L-type Ca^ channels in osteoblastic MC3T3-E1 cells and that the type of Ca^ channel involved in the Ca^ entry is the L-type. We investigated the effects of a Ca^-free saline and Bay K 8644, an L-type Ca^ channel activator, on intracellular Ca^ concentration ( [Ca^]i). Although high K^+ (100mM) alone raised the [Ca^]i, high K^+ did not raise the [Ca^]i in the absence of extracellular Ca^. Bay K 8644 (1uM) augmented the high K^+-induced [Ca^]i rise. In conclusion, it is confirmed that Ca^ invades through the voltage-dependent L-type Ca^ channels in osteoblastic MC3T3-E1 cells.journal articl
今・花澤:病理組織写真図譜についてとくに初版と再版との書誌学的比較
Get PDFapplication/pdfThe book "Microphotographical Atlas of Pathologic Histology" was published in 1910. The author is Dr. Yutaka Kon, Professer of Hokkaido Imperial University, but all microphotographs of diseases were taken by Dr. Kanae Hanazawa, Assistant Professor of Tokyo Dental College. This book is the first atlas consisting of original microphotographs in Japan. The second edition of the book appeared in 1923 ; however, the binding is very simple compared with the first edition, which is in a superb binding.journal articl
Potentiostatic Corrosion Test for Dental Amalgams
Get PDFapplication/pdfThe aim of this study was to examine the validity of a test method (report from ISO/TC meeting in London, October 1998, document N55) for the corrosion resistance of amalgam, considered for adoption as ISO (International Organization for Standardization) test. The corrosion resistance of six types of amalgam was evaluated using the proposed potentiostatic test (N55). The test procedure (N55) was found to be relatively simple and provide reproducible results. Therefore the proposed potentiostatic test can be justified as a standard test of corrosion resistance for dental amalgams.journal articl
Synaptic Connections of Mylohyoid Primary Afferent Terminals Made on Jaw-Opening Muscle Motoneurons in the Rat
Get PDFapplication/pdfHorseradish peroxidase conjugated with wheat germ agglutinin (HRP-WGA) was injected into the muscle branch of the mylohyoid nerve in rats. HRP-labeled neuronal cell bodies were observed ipsilaterally in the caudal portion of the trigeminal mesencephalic nucleus and the ventromedial division of the trigeminal motor nucleus (Vmo.vm). Electron microscope observations were carried out on sections through Vmo.vm containing HRP-labeled cell bodies. Synaptic contacts were found between HRP-labeled axon terminals and HRP-labeled nerve cells. The results suggested that mylohyoid muscle spindle afferents are synaptic contacts on the mylohyoid motoneurons.journal articl
上顎第一小臼歯のみを抜歯した上顎前突2症例
Get PDFapplication/pdfWe report two cases of Angle Class II maxillary protrusion with upper premolar extraction, considering differences of skeletal pattern, denture pattern, diagnosis, treat planning and treatment result between these cases. One case demonstrated favorable mandibular growth during the treatment, helping correction of maxillary and mandibular discrepancy, but the other showed only minimal mandibular growth because of her age, necessitating anterior incisal changes to reduce her large overjet. Post-treatment facial morphology of each patient was assessed regarding occlusion, denture pattern, skeletal pattern and others.journal articl