Meikai Daigaku shigaku zasshi = The Journal of Meikai University School of Dentistry最新文献

{"title":"[Report on clinico-pathological examinations in Meikai University (formerly Josai Dental University) Hospital (4)].","authors":"N Utsumi,&nbsp;Y Tajima,&nbsp;T Oi,&nbsp;J Ohno,&nbsp;H Shikata,&nbsp;T Seki,&nbsp;N Miyamoto,&nbsp;K Kanada,&nbsp;S Yokoyama,&nbsp;J Shimada","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>This clinico-pathological study was conducted to examine biopsies and surgical specimens for histopathological diagnosis from April 1983 to March 1988 in Meikai University (formerly Josai Dental University) Hospital. The following statistical results were obtained: 1) The total number of the specimens examined was 2705, 2026 from the dental clinic and 679 from the medical clinic. 2) Concerning age distribution, most specimens from the dental clinic were from patients in the 40's age bracket, whereas most from the medical clinic were from those under 10 years of age. With regard to sex distribution, the difference between males and females was not so much in the dental clinic specimens, but the number from the medical clinic was greater for males than for females. 3) Concerning classification of the tumors from the dental clinic, 181 cases were benign; and of them 41 were odontogenic and 140 were non-odontogenic tumors. Among the odontogenic tumors, ameloblastoma, cementoma, and odontoma were the most numerous. Among non-odontogenic tumors, fibroma was the most common, followed by pleomorphic adenoma. Malignant tumors comprised 77 cases. Of them squamous cell carcinoma was the most commonly found, with the grade-2 type being most numerous. Of the medical clinic tumors, nevus was the most common benign tumor observed; and adenocarcinoma, the most common malignant one. 4) Concerning the distribution of main lesions in the dental clinic specimens, most specimens were cysts or cystic lesions, followed by inflammatory lesions and tumors. Among medical clinic specimens, inflammatory lesions were the most common. 5) Regarding the dental clinic specimens, the most frequently observed case was the radicular cyst (301 samples) among the odontogenic cysts (514 samples); and among non-odontogenic cysts (290 samples), the most common was the mucous cyst (159 samples). 5) In terms of the distribution by location, tissue or organ, most tumors from the dental clinic were from the jaws, followed in descending frequency by those from gingiva and alveolar mucosa, maxillary sinus, lip, buccal mucosa, and tongue. Among the medical clinic tumors, the paranasal cavity and tonsils were the most frequent locations.</p>","PeriodicalId":77571,"journal":{"name":"Meikai Daigaku shigaku zasshi = The Journal of Meikai University School of Dentistry","volume":"19 3","pages":"383-98"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13289653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Interspecific hybridization in the Drosophila takahashii subspecies complex].","authors":"A Fukatami,&nbsp;A Inaba","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>To elucidate the relationship between 6 species involved in the Drosophila takahashii complex, we analyzed the existence of interspecific hybridization, hybrids number with sex ratio, and the reproductive status of the hybrids of these species. We found that each of the 6 species formed hybrids with at least one other species. The most closed relationship among these species was confirmed to be between D. lutescens and D. trilutea, and D. prostipennis was rather isolated from the other 5 species. In ascending order D. takahashii showed a closed relation to D. lutescens, D. trilutea, and D. paralutea. It was shown that D. prostipennis and D. nepalensis form hybrids with D. paralutea and D. lutescens, respectively.</p>","PeriodicalId":77571,"journal":{"name":"Meikai Daigaku shigaku zasshi = The Journal of Meikai University School of Dentistry","volume":"19 3","pages":"399-406"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13289654","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Colorimetric studies on hiding effect of Cosmotech porcelain for laminate restoration].","authors":"I Katayama,&nbsp;K Nakaura,&nbsp;H Henzan,&nbsp;Z Y Niu,&nbsp;S Kijima,&nbsp;T Kawamura,&nbsp;A Arakawa,&nbsp;T Kohchi,&nbsp;T Katayama,&nbsp;Y Amano","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The hiding effect on color tone of discolored teeth restored with ceramic laminate veneer crown was examined. Translucent (T1, T2), Enamel (E1, E2, E3), Dentin (DA2, DA3, DB2, DB3), Masking dentin (MDA2, MDA3, MDB2, MDB3) in 13 colors and Modifire (M61, M62, M65, M66, M67, M68, M69, M70, M79) in 7 colors of the ceramic materials (Cosmotech porcelain G C Co., Ltd) were examined in this experiments. The colorimetric examination of the color tone backing with the white or black color was carried out by testing for color difference (delta E*ab), value difference (delta L*), chrom and hue of the samples. The result obtained were as follows; 1. Color difference was higher in order of T2 greater than T1 in Translucent greater than E1 greater than E3 greater than E2 in Enamel greater than DB3 greater than DA2 greater than DA3 greater than DB2 in Dentin greater than MDB3 greater than MDA2 greater than MDB2 greater than MDA3 in Masking dentin, and M69 greater than M79 greater than M70 greater than M68 greater than M66 greater than M61 greater than M62 greater than M67 greater than M65 in Modifire. 2. Value difference was higher in order of T2 greater than T1 in Translucent greater than E1 greater than E3 greater than E2 in Enamel greater than DB3 greater than DA2 greater than DB2 greater than DA3 in Dentin greater than MDA2 greater than MDB3 greater than MDB2 greater than MDA3 in Masking dentin, and M69 greater than M70 greater than M79 greater than M68 greater than M66 greater than M61 greater than M67 greater than M65 greater than M62 in Modifire.(ABSTRACT TRUNCATED AT 250 WORDS)</p>","PeriodicalId":77571,"journal":{"name":"Meikai Daigaku shigaku zasshi = The Journal of Meikai University School of Dentistry","volume":"19 3","pages":"340-8"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13289755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Studies on the influence of composite resin filling material (Command Ultra fine) on the dental pulp].","authors":"S H Xia,&nbsp;C R Ben,&nbsp;Z Y Niu,&nbsp;T Kohchi,&nbsp;I Katayama","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Studies on the influence of composite resin filling material on the dental pulp of human 1st premolar are reported in this thesis. An other experiment was carried out on rabbit with the left 1st molar in their lower jaw as subject and the right 1st molar in the lower jaw as a control. In both experiments with human and rabbit, routine operations were performed to prepare the cavities and filled with composite resin material. The human teeth were extracted 21 days afterwards and the rabbit teeth were extracted 7 days afterwards. Edema was found in the dental pulp of both human and rabbit teeth by pathologic examination and was accompanied by hemangiectasis and lymphaniectasis. There was also vacuolar degeneration in the odontoblasts. Some of these cells were reticulated and the of number of odontoblasts was fewer than in the control. Hemangiectasis was even more serious in the rabbit's teeth than those of human.</p>","PeriodicalId":77571,"journal":{"name":"Meikai Daigaku shigaku zasshi = The Journal of Meikai University School of Dentistry","volume":"19 3","pages":"349-55"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13289756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Dental management of the medically compromised patient. A study of 162 cases].","authors":"K Saitoh,&nbsp;K Fujita,&nbsp;K Watanabe,&nbsp;S Suzuki,&nbsp;T Osuga,&nbsp;N Hiruma,&nbsp;H Saotome,&nbsp;Y Shigematsu,&nbsp;N Shionoya,&nbsp;T Yatagawa","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Dental management of 162 cases of medically compromised patients was reviewed. Over the past 3 years and 2 months, 130 patients with certain medical problems underwent 162 cases of dental treatment under local anesthesia. In the present study, research was done chiefly on intraoperative management of these patients. The following results were obtained: 1) In the population of 130 patients, those in their 7th decade were the most numerous. Among the subjects, essential hypertension was the most common underlying disease, and the majority of the patients had accompanying cardio-vascular diseases. 2) When the pre- and post-65-year-old patient groups were compared, the latter group had a higher frequency of multiple medical problems. 3) It is suggested that, to manage patients having hypertension or ischemic heart diseases as a complication, continuous blood pressure measurement and ECG monitoring are essential. 4) Among several local anesthetics, 3% prilocaine with 0.03 U/ml felypressin was used most frequently, especially for those with cardiovascular diseases. 5) In the management of hypertensive and ischemic heart patients, nitrous oxide inhalation sedation was effective. 6) For those who required vasodilation, administration of nifedipine or nitroglycerin was effective. 7) Although one case of syncope and another in which dental treatment procedure had to be suspended were found, no severe complications were encountered.</p>","PeriodicalId":77571,"journal":{"name":"Meikai Daigaku shigaku zasshi = The Journal of Meikai University School of Dentistry","volume":"19 3","pages":"407-17"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13305603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Simultaneous determination of GTP cyclohydrolase activity and biopterin content in pheochromocytoma PC12h cells.","authors":"N Nakanishi, S Ozawa, M Iwanaga, I Akatsuka, E Sawada, R Asaumi, H Hasegawa, S Yamada","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>A method to measure the GTP cyclohydrolase and biopterin (BP) content at the same time in the sonicate of pheochromocytoma PC12h cells was described. The cells cultured in a 5-cm dish were sonicated with 0.4 to 0.5 ml of 50 mM Tris-HCl, pH 7.8, and a 50 microliters aliquot was used for one assay. After the GTP cyclohydrolase reaction, dihydroneopterin triphosphate, the reaction product, was oxidized and dephosphorylated to form neopterin (NP); and the pterins in the reaction mixture were then analyzed by high-performance liquid chromatography (HPLC). Mainly three peaks of pterins were detected in the eluate from the HPLC column: they were NP, BP, and 2-amino-4-hydroxypteridine (AHP). The amount of NP was a measure of the enzyme activity. On the other hand, a significant part of the biopterin contained in the enzyme sample was converted to AHP during the GTP cyclohydrolase reaction. Therefore, the sum amount of BP plus AHP was a measure of total BP content in the enzyme sample (sonicate of PC12h cells). The method is convenient and useful to study the actions and action mechanisms of various biologically active substances on the BP level of pheochromocytoma cells in culture.</p>","PeriodicalId":77571,"journal":{"name":"Meikai Daigaku shigaku zasshi = The Journal of Meikai University School of Dentistry","volume":"19 2","pages":"197-203"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13125877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Complication of central retinal vein occlusion in iron deficiency anemia].","authors":"T Tashiro,&nbsp;H Takahashi,&nbsp;H Masuda,&nbsp;T Ichioka","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>A case of central retinal vein occlusion as a complication of severe iron deficiency anemia is reported. A 45-year-old woman noticed severe visual impairment in her left eye. Fundus findings showed typical impending occlusion of the central retinal vein, and laboratory investigation revealed severe iron deficiency anemia. She was followed by treatment with oral iron. Her visual acuity and fundus findings improved rapidly in response to iron supplement therapy, suggesting a relationship between central retinal vein occlusion and iron deficiency anemia. It seems very important therefore to investigate serum iron levels in female patients with central retinal vein occlusion.</p>","PeriodicalId":77571,"journal":{"name":"Meikai Daigaku shigaku zasshi = The Journal of Meikai University School of Dentistry","volume":"19 3","pages":"437-42"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13289657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Stability of screw fixation following sagittal splitting osteotomy of the mandibular ramus].","authors":"M Eba","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Recently, sagittal splitting osteotomy of the mandibular ramus is frequently performed in orthognathic surgeries of mandibular deformities. Although the surgical technique has been established. Methods for osteosynthesis following sagittal spitting of mandibular ramus still remain unestablished. Osteosynthesis is usually achieved by circumferencial wiring, interosseous wiring or screw fixation. It is unknown which of these three methods is best suited from dynamic and clinical point of view. The author carried out a simulation study of screw fixation using acrylic resin plate models and sagittally split air-dried human mandibles. The following result were obtained: 1) In the fixation experiment using an acrylic resin plate and AO cortical bone screws, a significantly smaller displacement was recorded by S3E type fixation, compared with other modes of fixation. In determining the amount of stress required for causing displacement, S3D type fixation required a significantly larger stress, compared with other modes of fixation. 2) In the destruction experiment using an acrylic resin plate and AO cortical bone screws, the critical displacement measured was significantly smaller by S3E type fixation compared with other modes of fixation S3C type fixation required a significantly larger amount of stress to cause destruction. 3) In the fixation experiment using the air-dried human mandibles and alumina ceramic screws, a significantly smaller displacement was recorded by 2-alumina ceramic screw fixation, compared with other modes of fixation. In determining the amount of stress required for causing displacement, 3-alumina ceramic screw fixation required a larger stress, compared with other modes of fixation. 4) In the fixation experiment using the air-dried human mandible and AO cortical bone screws, a significantly smaller displacement was recorded by 2-AO cortical bone screw fixation, compared with other modes of fixation. In determining the amount of stress required for causing displacement, 3-AO cortical bone screw fixation required a larger stress, compared with the 2-AO type of fixation. The above experimental results suggest that when the sagittally split proximal cortical plate retains enough thickness for tapping, clinical application of screw fixation either with alumina ceramic or AO cortical bone screws produces an adequately high anti-displacement effect, even if only 2 screws are used. However, when stability is evaluated in terms of the resistance to stress, 3-screw fixation is considered to amply satisfy the resistance required.</p>","PeriodicalId":77571,"journal":{"name":"Meikai Daigaku shigaku zasshi = The Journal of Meikai University School of Dentistry","volume":"19 3","pages":"356-76"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13289757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Mouse interleukin-1 production by Actinobacillus actinomycetemcomitans Y4 lipopolysaccharide and augmenting effect of indomethacin on its production].","authors":"T Tsutsui,&nbsp;S Hanazawa","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The present study demonstrates the ability of Actinobacillus actinomycetemcomitans lipopolysaccharide (LPS) to elicite interleukin-1 (IL-1) production and then augmenting effect of indomethacin on this production. LPS was isolated from A. actinomycetemcomitans Y4 by the hot phenol-water procedure (A-LPS). A marked IL-1 production by peritoneal macrophages treated with A-LPS was observed in the cells from C3H/HeN mice, but not in those from C3H/HeJ mice. LPSs from A. actinomycetemcomitans ATCC 29522 and 29523 exhibited the same inducing activity for IL-1 production as did A-LPS. The IL-1 production with A-LPS was inhibited drastically when the LPS was pretreated with polymyxin B. A-LPS-induced IL-1 production was augmented significantly by treatment of the cells with a inhibitor, indomethacin, but not with a lipooxygenase inhibitor, nordihydroguariatic acid. The augmenting effect occurred as early as 3 hr after treatment of indomethacin. In light of recent studies showing that IL-1 plays a regulatory role in bone remodeling systems, the present result suggest the possibility that A-LPS-induced IL-1 may play a significant role in mechanism(s) of alveolar bone resorption in juvenile periodontitis and also that its production may be regulated by prostaglandins.</p>","PeriodicalId":77571,"journal":{"name":"Meikai Daigaku shigaku zasshi = The Journal of Meikai University School of Dentistry","volume":"19 2","pages":"277-85"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13289003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Time-course of changes in alveolar bone surrounding and vascular system of molars of rats fed a high-protein low-calcium diet].","authors":"J Abe","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The purpose of this study was to demonstrate changes in alveolar bone surrounding and blood vessels in the molar teeth of rats fed a high-protein low-calcium diet for various periods of time. Five-week-old male Sprague-Dawley rats were used. Control rats were given a normal diet; whereas the experimental rats were fed a high-protein low-calcium diet for 3, 5, 7, 10, 14, 18 or 21 days. Samples were observed by means of light microscopy and scanning electron microscopy, and the following results were obtained. 1. The changes appeared earlier in the dental alveolus than in the diaphysis of the femur. 2. Early changes in the alveolus were observed clearly in the 7-day experimental group. 3. Bone resorption progressed mesio-distally and cervically from spongy bone with the passage of time, and severe osteoporosis was observed in the 18-day experimental group. 4. An enlarged marrow cavity caused by bone resorption was observed, but the height and overall shape of the alveolar bone showed no changes, indicating the continuance of its support function. 5. The architecture of blood vessels in the bone marrow changed its form gradually from 7-day experimental diet and the vessels appeared to have been functioning like a cushion against mastication or physiological force acting on bone. 6. The vessels in the periodontal membrane exhibited characteristic changes in the cervical and apical resins of the membrane as bone resorption proceeded and changes in vessels in the bone marrow also progressed, and the vessels showed a relatively dense distribution there.</p>","PeriodicalId":77571,"journal":{"name":"Meikai Daigaku shigaku zasshi = The Journal of Meikai University School of Dentistry","volume":"19 1","pages":"43-62"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13289107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}