Pub Date : 1995-09-30DOI: 10.11516/DENTALMEDRES1981.15.193
T. Kodaka, S. Higashi
{"title":"Surface-Overlapping Projections on the Hypoplastic Enamel Surface with Keyhole-Shaped Prisms","authors":"T. Kodaka, S. Higashi","doi":"10.11516/DENTALMEDRES1981.15.193","DOIUrl":"https://doi.org/10.11516/DENTALMEDRES1981.15.193","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":"1995-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64474752","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 : 1995-09-30DOI: 10.11516/DENTALMEDRES1981.15.165
T. Kodaka, A. Ishikawa, S. Higashi
{"title":"Scanning Electron Microscopic Observations of Various Enamel Caps and Enamel-like Deposits in Human Permanent Teeth","authors":"T. Kodaka, A. Ishikawa, S. Higashi","doi":"10.11516/DENTALMEDRES1981.15.165","DOIUrl":"https://doi.org/10.11516/DENTALMEDRES1981.15.165","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":"1995-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64474725","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 : 1995-09-30DOI: 10.11516/DENTALMEDRES1981.15.178
C. Maki, T. Okano
{"title":"Thickness and Echo Level of Masseter Muscle of Patients with Jaw Deformity","authors":"C. Maki, T. Okano","doi":"10.11516/DENTALMEDRES1981.15.178","DOIUrl":"https://doi.org/10.11516/DENTALMEDRES1981.15.178","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":"1995-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64474732","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 : 1995-09-30DOI: 10.11516/DENTALMEDRES1981.15.213
Y. Kumakura, K. Seki, Y. Kimura, T. Hanazawa, T. Sano, T. Okano
Five cases of second branchial cleft cyst were evaluated with computed tomography (CT). One case of them was also evaluated with magnetic resonance imaging (MRI). CT and MRI were helpful to diagnosis and surgery because of their demonstrating exact locations of these masses related to the deep structures in the neck, as reported previously.
{"title":"Second Branchial Cleft Cyst on CT : Report of Five Cases","authors":"Y. Kumakura, K. Seki, Y. Kimura, T. Hanazawa, T. Sano, T. Okano","doi":"10.11516/DENTALMEDRES1981.15.213","DOIUrl":"https://doi.org/10.11516/DENTALMEDRES1981.15.213","url":null,"abstract":"Five cases of second branchial cleft cyst were evaluated with computed tomography (CT). One case of them was also evaluated with magnetic resonance imaging (MRI). CT and MRI were helpful to diagnosis and surgery because of their demonstrating exact locations of these masses related to the deep structures in the neck, as reported previously.","PeriodicalId":77624,"journal":{"name":"Showa Shigakkai zasshi = The Journal of Showa University Dental Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1995-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64474803","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 : 1995-06-30DOI: 10.11516/DENTALMEDRES1981.15.119
Teuku Syafiuddin, T. Igarashi, T. Toko, H. Hisamitsu, N. Goto
{"title":"Bacteriological and Mechanical Evaluation of Resin Composites Containing Antibacterial Filler (Apacider)","authors":"Teuku Syafiuddin, T. Igarashi, T. Toko, H. Hisamitsu, N. Goto","doi":"10.11516/DENTALMEDRES1981.15.119","DOIUrl":"https://doi.org/10.11516/DENTALMEDRES1981.15.119","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":"1995-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64474368","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 : 1995-06-30DOI: 10.11516/DENTALMEDRES1981.15.85
K. Iwaki, K. Itoh, S. Wakumoto, H. Hisamitsu
{"title":"MOD Cavity Adaptation of a Ceramic Inlay Prepared by a non-Computer-Aided Milling System","authors":"K. Iwaki, K. Itoh, S. Wakumoto, H. Hisamitsu","doi":"10.11516/DENTALMEDRES1981.15.85","DOIUrl":"https://doi.org/10.11516/DENTALMEDRES1981.15.85","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":"1995-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64474645","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 : 1995-06-30DOI: 10.11516/DENTALMEDRES1981.15.105
Kamolapatr Junyaprasert
{"title":"Pulsed Electromagnetic Fields Stimulate Bone Formation in Midpalatal Suture after Rapid Maxillary Expansion","authors":"Kamolapatr Junyaprasert","doi":"10.11516/DENTALMEDRES1981.15.105","DOIUrl":"https://doi.org/10.11516/DENTALMEDRES1981.15.105","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":"1995-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64474357","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 : 1995-06-30DOI: 10.11516/DENTALMEDRES1981.15.51
M. F. Talass
The purpose of this article is to introduce Optiflex(TM), the first non-metal archwire in orthodontics. This clear archwire is comprised of three layers: a silicone dioxide core, a silicon resin middle layer and a stain-resistant nylon outer layer. It is available in two sizes: 0.017" and 0.021". Optiflex was compared to three other flexible archwires (Niti, Respond and Nitinol) by means of tensile, bending and time-dependent effects tests. The results showed that : 1. The tensile strength of Optiflex was significantly lower than that of metal archwires. 2. The force delivered by Optiflex was much lighter and more constant than those delivered by other archwires. 3. The force of Optiflex was less than half the force delivered by at "Respond" archwire of similar size. 4. Time-dependent effects of Optiflex were almost identical to those of nickel-titanium. These mechanical advantages, along with its esthetic properties and stain resistance, make Optiflex a unique addition to orthodontic archwires currently available. The new archwire is highly effective in the alignment of crowding in most orthodontic cases, particularly adults with special esthetic considerations.
{"title":"Optical Fibers as Orthodontic Archwires : Optiflex","authors":"M. F. Talass","doi":"10.11516/DENTALMEDRES1981.15.51","DOIUrl":"https://doi.org/10.11516/DENTALMEDRES1981.15.51","url":null,"abstract":"The purpose of this article is to introduce Optiflex(TM), the first non-metal archwire in orthodontics. This clear archwire is comprised of three layers: a silicone dioxide core, a silicon resin middle layer and a stain-resistant nylon outer layer. It is available in two sizes: 0.017\" and 0.021\". Optiflex was compared to three other flexible archwires (Niti, Respond and Nitinol) by means of tensile, bending and time-dependent effects tests. The results showed that : 1. The tensile strength of Optiflex was significantly lower than that of metal archwires. 2. The force delivered by Optiflex was much lighter and more constant than those delivered by other archwires. 3. The force of Optiflex was less than half the force delivered by at \"Respond\" archwire of similar size. 4. Time-dependent effects of Optiflex were almost identical to those of nickel-titanium. These mechanical advantages, along with its esthetic properties and stain resistance, make Optiflex a unique addition to orthodontic archwires currently available. The new archwire is highly effective in the alignment of crowding in most orthodontic cases, particularly adults with special esthetic considerations.","PeriodicalId":77624,"journal":{"name":"Showa Shigakkai zasshi = The Journal of Showa University Dental Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1995-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.11516/DENTALMEDRES1981.15.51","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64475018","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 : 1995-06-30DOI: 10.11516/DENTALMEDRES1981.15.76
T. Kodaka, A. Ishikawa, S. Higashi
Various-shaped and sized defects of human coronal enamel were illustrated by scanning electron microscopy. Small Tomes' process pits (TPP) and larger focal holes (FH) were usually present in the enamel surfaces. On the other hand, FH-like defects were often scattered in the regions adjacent to large enamel defects. Some TPP contained a smaller punchedout deep pit (POP). In the natural surfaces of hypoplastic enamel, keyhole-shaped prism structures (KHP) were observed. Some KHP also contained a POP . That is, the center of enamel prisms occasionally mineralized later than the other prism regions. Small deep holes, roughly equal to FH in diameter, were relatively rarely observed . In rare cases, large shallow and deep defects were observed, while minor irregular oval or slit-shaped defects with a depth up to 15 μm were scattered in the supracervical zones . In addition, the rows of conic-shaped defects running longitudinally or transversely were found in the supracervical zones . The floors of the large defects showed TPP, KHP, or afibrillar cementum-like structures as well as smooth enamel surfaces. FH and TPP occasionally with a smaller POP , which are usually present along the perikymatas, are formed by the final stage of normal amelogenesis , while the remaining pits and defects must have been caused by some hypoplastic enamel .
{"title":"Scanning Electron Microscopic Observations of Various-Shaped and Sized Enamel Defects in Human Teeth","authors":"T. Kodaka, A. Ishikawa, S. Higashi","doi":"10.11516/DENTALMEDRES1981.15.76","DOIUrl":"https://doi.org/10.11516/DENTALMEDRES1981.15.76","url":null,"abstract":"Various-shaped and sized defects of human coronal enamel were illustrated by scanning electron microscopy. Small Tomes' process pits (TPP) and larger focal holes (FH) were usually present in the enamel surfaces. On the other hand, FH-like defects were often scattered in the regions adjacent to large enamel defects. Some TPP contained a smaller punchedout deep pit (POP). In the natural surfaces of hypoplastic enamel, keyhole-shaped prism structures (KHP) were observed. Some KHP also contained a POP . That is, the center of enamel prisms occasionally mineralized later than the other prism regions. Small deep holes, roughly equal to FH in diameter, were relatively rarely observed . In rare cases, large shallow and deep defects were observed, while minor irregular oval or slit-shaped defects with a depth up to 15 μm were scattered in the supracervical zones . In addition, the rows of conic-shaped defects running longitudinally or transversely were found in the supracervical zones . The floors of the large defects showed TPP, KHP, or afibrillar cementum-like structures as well as smooth enamel surfaces. FH and TPP occasionally with a smaller POP , which are usually present along the perikymatas, are formed by the final stage of normal amelogenesis , while the remaining pits and defects must have been caused by some hypoplastic enamel .","PeriodicalId":77624,"journal":{"name":"Showa Shigakkai zasshi = The Journal of Showa University Dental Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1995-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64475090","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 : 1995-03-31DOI: 10.11516/DENTALMEDRES1981.15.7
T. Kodaka, S. Higashi
The simple or branched invaginations of dens invaginatus were histologically observed by using 6 ground sections (2 molars and 4 incisors). In all the teeth, the invaginations have hypoplastic enamel showing a variable thickness and an irregular outline. The relatively thick enamel irregularly arranged the Retzius lines and prismless structures were present in the innermost layers besides the surface layers. In 4 teeth, enamel-free areas were partially found on the dentin surfaces, and afibrillar cementum occasionally covered the enamel-free areas as well as the enamel surfaces. The dentin of a molar tooth had giant tubules between the dichotomously branched invaginations and other giant tubules opened into the invagination floor. Some dentinal tubules in the terminal regions had abnormal structures similar to the Tomes' granules adjacent to the invaginations of the 2 molar teeth. In all the incisor teeth, a seam line of dentin fusion or a slit line succeeding to the dental pulp cavity was present in the dentin under the linguogingival ridge. Thus, the gross formation of dens invaginatus also causes the invagination to form locally abnormal structures, especially in the enamel regions; although some findings have been previously reported.
{"title":"Optical Microscopic, Microradiographic and Scanning Electron Microscopic Observations of Some Dens Invaginatus","authors":"T. Kodaka, S. Higashi","doi":"10.11516/DENTALMEDRES1981.15.7","DOIUrl":"https://doi.org/10.11516/DENTALMEDRES1981.15.7","url":null,"abstract":"The simple or branched invaginations of dens invaginatus were histologically observed by using 6 ground sections (2 molars and 4 incisors). In all the teeth, the invaginations have hypoplastic enamel showing a variable thickness and an irregular outline. The relatively thick enamel irregularly arranged the Retzius lines and prismless structures were present in the innermost layers besides the surface layers. In 4 teeth, enamel-free areas were partially found on the dentin surfaces, and afibrillar cementum occasionally covered the enamel-free areas as well as the enamel surfaces. The dentin of a molar tooth had giant tubules between the dichotomously branched invaginations and other giant tubules opened into the invagination floor. Some dentinal tubules in the terminal regions had abnormal structures similar to the Tomes' granules adjacent to the invaginations of the 2 molar teeth. In all the incisor teeth, a seam line of dentin fusion or a slit line succeeding to the dental pulp cavity was present in the dentin under the linguogingival ridge. Thus, the gross formation of dens invaginatus also causes the invagination to form locally abnormal structures, especially in the enamel regions; although some findings have been previously reported.","PeriodicalId":77624,"journal":{"name":"Showa Shigakkai zasshi = The Journal of Showa University Dental Society","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1995-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"64475063","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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