Pub Date : 1997-12-31DOI: 10.11516/DENTALMEDRES1981.17.404
E. Wakatsuki, S. Kondo, M. Arai, K. Nakajima, Kazuhiko Oka
The purpose of this study was to investigate in three dimensions the differences in face form between Filipino females, who belong to Sundadont, and Japanese females, who belongs to Sinodont, using moire Topography. The Subjects were 70 adult Filipino females of ages 17-38 years and 70 Japanese females of ages 14-24 years. The width, height and depth of each facial part were measured and statistically compared. 1. The Japanese females had a broad and long middle face and a long nose, whether elatively or absolutely. The Filipino females had long mouths, broad noses, and large and protruding lips. These lip features are also identified in the Negroid, and are thought to be an adaptation to Southern migration. 2. Though a few items were large in the right face, the left face was relatively large in the Japanese female. In the Filipino female, no items were large in the right face and most were large in the left face. There seemed to be tendency for the left face to be large in general, although there was some difference between the groups.
{"title":"Three Dimensional Study of Sundadont and Sinodont Face Forms","authors":"E. Wakatsuki, S. Kondo, M. Arai, K. Nakajima, Kazuhiko Oka","doi":"10.11516/DENTALMEDRES1981.17.404","DOIUrl":"https://doi.org/10.11516/DENTALMEDRES1981.17.404","url":null,"abstract":"The purpose of this study was to investigate in three dimensions the differences in face form between Filipino females, who belong to Sundadont, and Japanese females, who belongs to Sinodont, using moire Topography. The Subjects were 70 adult Filipino females of ages 17-38 years and 70 Japanese females of ages 14-24 years. The width, height and depth of each facial part were measured and statistically compared. 1. The Japanese females had a broad and long middle face and a long nose, whether elatively or absolutely. The Filipino females had long mouths, broad noses, and large and protruding lips. These lip features are also identified in the Negroid, and are thought to be an adaptation to Southern migration. 2. Though a few items were large in the right face, the left face was relatively large in the Japanese female. In the Filipino female, no items were large in the right face and most were large in the left face. There seemed to be tendency for the left face to be large in general, although there was some difference between the groups.","PeriodicalId":77624,"journal":{"name":"Showa Shigakkai zasshi = The Journal of Showa University Dental Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1997-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64475681","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}
Pub Date : 1997-12-31DOI: 10.11516/DENTALMEDRES1981.17.400
Jungho Kim, H. Kotake, Shigeru Matsubara, M. Sano, Kihei Kobayashi, Keishi Iwamoto
{"title":"Hand Grasp Force during Static Teeth Clenching and Nonclenching","authors":"Jungho Kim, H. Kotake, Shigeru Matsubara, M. Sano, Kihei Kobayashi, Keishi Iwamoto","doi":"10.11516/DENTALMEDRES1981.17.400","DOIUrl":"https://doi.org/10.11516/DENTALMEDRES1981.17.400","url":null,"abstract":"","PeriodicalId":77624,"journal":{"name":"Showa Shigakkai zasshi = The Journal of Showa University Dental Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1997-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64475600","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}
Pub Date : 1997-12-31DOI: 10.11516/DENTALMEDRES1981.17.341
T. Kodaka, M. Kuroiwa, S. Higashi
{"title":"Changes of Human Dentin by Brushing with Several Kinds of Commercial Dentifrices in vitro","authors":"T. Kodaka, M. Kuroiwa, S. Higashi","doi":"10.11516/DENTALMEDRES1981.17.341","DOIUrl":"https://doi.org/10.11516/DENTALMEDRES1981.17.341","url":null,"abstract":"","PeriodicalId":77624,"journal":{"name":"Showa Shigakkai zasshi = The Journal of Showa University Dental Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1997-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64475502","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}
Pub Date : 1997-09-30DOI: 10.11516/DENTALMEDRES1981.17.208
T. Kodaka, M. Kuroiwa, S. Higashi
By using commercial dentifrices for sensitive teeth, automatic two-dimensionally rotated toothbrushing was performed on the tangential ground surfaces of human sound dentin in the cervical regions for 10 min in vitro. The dentin surfaces were observed with scanning electron and scanning laser microscopes. The brushing caused remarkable abrasion with the traces of toothbrush bristles on account of the abrasive agents, while most of the dentinal tubules were occluded with dentin sludge or covered with smear layers. Therefore, daily toothbrushing with such dentifrices will promote the formation of wedge-shaped defects in the cervical regions, even if the dentin hypersensitivity is decreased temporarily due to the occlusion of the exposed tubules.
{"title":"Changes of Human Dentin by Brushing with Commercial Dentifrices for Sensitive Teeth in vitro","authors":"T. Kodaka, M. Kuroiwa, S. Higashi","doi":"10.11516/DENTALMEDRES1981.17.208","DOIUrl":"https://doi.org/10.11516/DENTALMEDRES1981.17.208","url":null,"abstract":"By using commercial dentifrices for sensitive teeth, automatic two-dimensionally rotated toothbrushing was performed on the tangential ground surfaces of human sound dentin in the cervical regions for 10 min in vitro. The dentin surfaces were observed with scanning electron and scanning laser microscopes. The brushing caused remarkable abrasion with the traces of toothbrush bristles on account of the abrasive agents, while most of the dentinal tubules were occluded with dentin sludge or covered with smear layers. Therefore, daily toothbrushing with such dentifrices will promote the formation of wedge-shaped defects in the cervical regions, even if the dentin hypersensitivity is decreased temporarily due to the occlusion of the exposed tubules.","PeriodicalId":77624,"journal":{"name":"Showa Shigakkai zasshi = The Journal of Showa University Dental Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1997-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64475312","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}
Pub Date : 1997-09-30DOI: 10.11516/DENTALMEDRES1981.17.197
R. Hamada, S. Kondo, E. Wakatsuki
{"title":"Odontometrical Analysis of Filipino Dentition","authors":"R. Hamada, S. Kondo, E. Wakatsuki","doi":"10.11516/DENTALMEDRES1981.17.197","DOIUrl":"https://doi.org/10.11516/DENTALMEDRES1981.17.197","url":null,"abstract":"","PeriodicalId":77624,"journal":{"name":"Showa Shigakkai zasshi = The Journal of Showa University Dental Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1997-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64475211","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}
Pub Date : 1997-09-30DOI: 10.11516/DENTALMEDRES1981.17.219
T. Cao, K. Ohno, T. Shirota, Michi Ken-ichi
Muscle/periosteal flaps were raised and 4.5-mm defects were created bilaterally in the tibiae of 12 rabbits. On the test side, Polyglactin 910 woven mesh was placed over the defect and the flaps were sutured. The defect on the contralateral side served as a control. After healing periods of 4 days, 1, 2, 4, 8 and 13 weeks the animals were killed, and 15-,am, hematoxylin and eosin-stained, undecalcified sections were prepared and examined. By 8 weeks postoperatively the mesh-covered defect had thoroughly healed with new bone, whereas the control showed discontinuous new bone in the defect. The mesh had been completely absorbed. The results indicate that the mesh guides bone regeneration during the early stages of healing and is eventualy absorbed.
{"title":"Experimental Bone Defect Healing with an Absorbable Membrane in Rabbits","authors":"T. Cao, K. Ohno, T. Shirota, Michi Ken-ichi","doi":"10.11516/DENTALMEDRES1981.17.219","DOIUrl":"https://doi.org/10.11516/DENTALMEDRES1981.17.219","url":null,"abstract":"Muscle/periosteal flaps were raised and 4.5-mm defects were created bilaterally in the tibiae of 12 rabbits. On the test side, Polyglactin 910 woven mesh was placed over the defect and the flaps were sutured. The defect on the contralateral side served as a control. After healing periods of 4 days, 1, 2, 4, 8 and 13 weeks the animals were killed, and 15-,am, hematoxylin and eosin-stained, undecalcified sections were prepared and examined. By 8 weeks postoperatively the mesh-covered defect had thoroughly healed with new bone, whereas the control showed discontinuous new bone in the defect. The mesh had been completely absorbed. The results indicate that the mesh guides bone regeneration during the early stages of healing and is eventualy absorbed.","PeriodicalId":77624,"journal":{"name":"Showa Shigakkai zasshi = The Journal of Showa University Dental Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1997-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64475382","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}
Pub Date : 1997-06-30DOI: 10.11516/DENTALMEDRES1981.17.113
T. Kodaka, K. Debari, M. Abe, S. Higashi
{"title":"Physical and Morphological Studies of the Susceptible Fissure Enamel against Dental Caries in Rat Molar Teeth","authors":"T. Kodaka, K. Debari, M. Abe, S. Higashi","doi":"10.11516/DENTALMEDRES1981.17.113","DOIUrl":"https://doi.org/10.11516/DENTALMEDRES1981.17.113","url":null,"abstract":"","PeriodicalId":77624,"journal":{"name":"Showa Shigakkai zasshi = The Journal of Showa University Dental Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1997-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64475136","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}
Pub Date : 1997-06-30DOI: 10.11516/DENTALMEDRES1981.17.105
T. Kodaka, M. Abe, S. Higashi
It has been reported that the fissures of rat molar teeth are apt to cause dental caries. In this study, we observed enamel lamellae in the fissures of caries-free molar teeth of rats, 2 and 4 weeks after birth, by transmitted light microscopy with decalcified sections and by scanning electron microscopy with EDTA-treated samples. Enamel lamellae were always present buccolingually in the fissure enamel. In unerupted teeth, the organic lamellae showing an intermittent structure were composed of the organic matrix, derived from ameloblasts and reduced enamel epithelium, occasionally with these epithelial cells. After eruption, the thin organic membrane of enamel lamellae was probably derived from saliva as well as the organic matrix formed during the enamel formation. The lamellae also contained oral microorganisms and fibrous structures, some of which were formed from microorganisms, under the widely opened fissures containing the deposits of oral microorganisms and diet remnants. Thus, we strongly suggest that such fissure lamellae of rat molar teeth are apt to become the passing point in the way to inducing the dentin caries.
{"title":"Fine Structure of Susceptible Enamel Lamellae against Dentin Caries in the Fissures of Rat Molar Teeth","authors":"T. Kodaka, M. Abe, S. Higashi","doi":"10.11516/DENTALMEDRES1981.17.105","DOIUrl":"https://doi.org/10.11516/DENTALMEDRES1981.17.105","url":null,"abstract":"It has been reported that the fissures of rat molar teeth are apt to cause dental caries. In this study, we observed enamel lamellae in the fissures of caries-free molar teeth of rats, 2 and 4 weeks after birth, by transmitted light microscopy with decalcified sections and by scanning electron microscopy with EDTA-treated samples. Enamel lamellae were always present buccolingually in the fissure enamel. In unerupted teeth, the organic lamellae showing an intermittent structure were composed of the organic matrix, derived from ameloblasts and reduced enamel epithelium, occasionally with these epithelial cells. After eruption, the thin organic membrane of enamel lamellae was probably derived from saliva as well as the organic matrix formed during the enamel formation. The lamellae also contained oral microorganisms and fibrous structures, some of which were formed from microorganisms, under the widely opened fissures containing the deposits of oral microorganisms and diet remnants. Thus, we strongly suggest that such fissure lamellae of rat molar teeth are apt to become the passing point in the way to inducing the dentin caries.","PeriodicalId":77624,"journal":{"name":"Showa Shigakkai zasshi = The Journal of Showa University Dental Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1997-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64475489","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}
Pub Date : 1997-03-31DOI: 10.11516/DENTALMEDRES1981.17.10
T. Kodaka, S. Higashi
{"title":"Distribution Pattern of Enamel Lamellae in Rat Molar Teeth","authors":"T. Kodaka, S. Higashi","doi":"10.11516/DENTALMEDRES1981.17.10","DOIUrl":"https://doi.org/10.11516/DENTALMEDRES1981.17.10","url":null,"abstract":"","PeriodicalId":77624,"journal":{"name":"Showa Shigakkai zasshi = The Journal of Showa University Dental Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1997-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64475097","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}
Pub Date : 1997-03-31DOI: 10.11516/DENTALMEDRES1981.17.41
A. Fujishima, Y. Fujishima, J. Ferracane, T. Miyazaki, A. Shiba
{"title":"Factors Affecting the Bonding of Silicoater MD System for Resin Veneering to Cp Titanium","authors":"A. Fujishima, Y. Fujishima, J. Ferracane, T. Miyazaki, A. Shiba","doi":"10.11516/DENTALMEDRES1981.17.41","DOIUrl":"https://doi.org/10.11516/DENTALMEDRES1981.17.41","url":null,"abstract":"","PeriodicalId":77624,"journal":{"name":"Showa Shigakkai zasshi = The Journal of Showa University Dental Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1997-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64475746","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}
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