Dental medicine research最新文献_第2页

Relationships among Occlusal Force, Condylar Surface Area, and Facial Patterns 咬合力、髁突表面积和面部形态之间的关系

Dental medicine research Pub Date : 2013-07-31 DOI: 10.7881/DENTALMEDRES.33.169

Chia-Hsiao Kuo, Mariko Takahashi, K. Maki

{"title":"Relationships among Occlusal Force, Condylar Surface Area, and Facial Patterns","authors":"Chia-Hsiao Kuo, Mariko Takahashi, K. Maki","doi":"10.7881/DENTALMEDRES.33.169","DOIUrl":"https://doi.org/10.7881/DENTALMEDRES.33.169","url":null,"abstract":"The interactions between orofacial muscles and skeletal patterns are widely recognized as significant factors in craniofacial growth. Many studies have suggested that the vertical facial growth pattern correlates with occlusal forces and the activity of masticatory muscles. In particular, it has been suggested that occlusal forces produced by masticatory muscles are converted into physiological stress at the condyle in the form of functional strain. In such circumstances, the dimensions and morphology of the condyle ought to be affected. The aim of this study is to test the hypothesis that low-angle subjects with larger occlusal forces tend to have mandibular condyles with a larger surface area than high-angle subjects. Cone-beam computed tomographic scans were obtained from 14 Japanese adult subjects (17 to 33 years old, 7 high angle and 7 low angle) at 60 kV and 10 mA. Occlusal force was measured by pressure-indicating fi lms, and the surface area of the condyle was calculated from axial CT data. The correlation between occlusal conditions and the surface area of condyles was compared between the two facial groups. We found that the low-angle group had a signifi cantly larger surface area and volume of condyles than the high-angle group and that there was a positive correlation between occlusal forces and condylar surface area. Our fi ndings demonstrate that occlusal force is one of the important factors that affect the mechanical environment of the condyle.","PeriodicalId":120057,"journal":{"name":"Dental medicine research","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125278465","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}

引用次数: 3

テンポラリーアンカレッジデバイスを用いた下顎大臼歯遠心移動により治療を行った過蓋咬合を伴うAngle Cl. III前歯反対咬合症例 Angle Cl. III门牙反咬合病例，使用templary锚定装置进行下颌大臼齿离心移动治疗的过盖咬合。

Dental medicine research Pub Date : 2013-07-31 DOI: 10.7881/DENTALMEDRES.33.185

睦間所, 芳和宮崎

引用次数: 0

Efficacy of Three Caries-staining Agents 三种蛀牙染色剂的疗效观察

Dental medicine research Pub Date : 2013-03-31 DOI: 10.7881/DENTALMEDRES.33.76

Misa Oikawa, K. Itoh, M. Kusunoki, Nobuya Kitahara, T. Miyazaki

{"title":"Efficacy of Three Caries-staining Agents","authors":"Misa Oikawa, K. Itoh, M. Kusunoki, Nobuya Kitahara, T. Miyazaki","doi":"10.7881/DENTALMEDRES.33.76","DOIUrl":"https://doi.org/10.7881/DENTALMEDRES.33.76","url":null,"abstract":": To avoid excessive excavation of carious dentin, we developed a caries-detecting agent composed of polypropylene glycol to stain caries-affected dentin. The purpose of this study was to evaluate the new agent by examining the characteristics of the dentin surface after removal of carious dentin. Eight extracted human teeth with dentin caries were used. The teeth were longitudinally sectioned through the center of the caries and micro Vickers hardness (MVH) was measured from the pulpal wall to the caries cavity every 200 μ m. Carious dentin was then removed using a steel bur following Caries Check (Nishika, Yamaguchi, Japan) staining. After removal of the stained dentin, the MVH of the dentin was determined by observing the indentation on the dentin; the DIAGNOdent value (D-value) was measured using DIAGNOdent (Kavo, Biberach, Germany). Then a new caries-staining agent (Discover RED, Phoenix Dental, Inc., Fenton, MI, USA) was applied in the cavity, the stained dentin was removed, and the MVH and D-value were measured. Finally, such procedures were repeated using Caries Detector (Kuraray, Tokyo, Japan). After the ﬁ nal measurements, the microstructure of the dentin cavity wall was observed by scanning electron microscopy. The differences in the MVH and D-value between using Caries Detector and Discover RED were not signi ﬁ cant. However, the differences in the MVH and D-value between the Caries Check and the other two methods were signi ﬁ cant. Caries Check may be the most useful modality for the more precise excavation of carious dentin and preservation of sclerotic dentin.","PeriodicalId":120057,"journal":{"name":"Dental medicine research","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116942555","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}

引用次数: 1

Fructooligosaccharide Consumption Improves the Decreased Cortical Bone Following Gastrectomy in Rats 低聚果糖可改善大鼠胃切除术后皮质骨的减少

Dental medicine research Pub Date : 2013-03-31 DOI: 10.7881/DENTALMEDRES.33.100

N. Sakai, T. Morohashi, S. Yamada

引用次数: 0

Three-dimensional Motion Analysis of Lip and Mandibular Movements during Mastication 咀嚼过程中唇、下颌运动的三维运动分析

Dental medicine research Pub Date : 2013-03-31 DOI: 10.7881/DENTALMEDRES.33.88

M. Watarai, R. Ayano, T. Funatsu, T. Ooka, Mari Takahashi, M. Inoue

{"title":"Three-dimensional Motion Analysis of Lip and Mandibular Movements during Mastication","authors":"M. Watarai, R. Ayano, T. Funatsu, T. Ooka, Mari Takahashi, M. Inoue","doi":"10.7881/DENTALMEDRES.33.88","DOIUrl":"https://doi.org/10.7881/DENTALMEDRES.33.88","url":null,"abstract":"Many aspects of the coordination of lip and mandibular movements in the process of eating have not yet been clarifi ed. This time, aiming to objectively evaluate lip and mandibular movements when chewing, the movements of the corners of the mouth and the mandible during mastication were measured three-dimensionally and analyzed. The subjects were 20 healthy women with individual normal occlusion. The test food was a commercially-available biscuit with a weight of 1 g. With six measuring points set for the lips and pogonion, the movements at those measuring points were captured with two CCD cameras during mastication, and the resulting images were analyzed with a three-dimensional motion analysis system. The analysis result showed that Xand Z-axis movements occurred on the working-side corner of the mouth, with Z-axis movements preceding X-axis movements, while on the balancing-side corner of the mouth, Xand Z-axis movements occurred simultaneously. Data on the amount, time taken, and speed of movements measured at each anatomical landmark showed that the working-side corner of the mouth moved a greater distance at a faster pace and, therefore, in less time than that of the balancing-side corner of the mouth. This is conceivably due to the aforementioned differences in Xand Z-axis movements of the working-side and balancing-side corners of the mouth. Further comparisons and studies with expansion of the subjects to include children will be necessary.","PeriodicalId":120057,"journal":{"name":"Dental medicine research","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116116752","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}

引用次数: 2

International Standards in Dental Products and Clinical Communication Tools 牙科产品和临床通讯工具的国际标准

Dental medicine research Pub Date : 2013-03-31 DOI: 10.7881/DENTALMEDRES.33.12

T. Okano, Y. Tamaki, K. Araki

引用次数: 0

History of Developmental Studies on Eating Function 饮食功能发展研究的历史

Dental medicine research Pub Date : 2013-03-31 DOI: 10.7881/DENTALMEDRES.33.23

Y. Mukai

引用次数: 1

Current Status of Dental Cone-Beam Computed Tomography 牙科锥束计算机断层扫描的现状

Dental medicine research Pub Date : 2013-03-31 DOI: 10.7881/DENTALMEDRES.33.2

T. Okano, S. Patil

引用次数: 1

Analysis of Signal Fading of Photostimulable Phosphor Plate System and Its Effect on the Accuracy in Detecting Proximal Caries 光刺激荧光板系统信号衰落分析及其对近端龋检测精度的影响

Dental medicine research Pub Date : 2013-03-31 DOI: 10.7881/DENTALMEDRES.33.68

Tsuneyasu Terauchi, Y. Matsuda, K. Araki, K. Seki, T. Okano

{"title":"Analysis of Signal Fading of Photostimulable Phosphor Plate System and Its Effect on the Accuracy in Detecting Proximal Caries","authors":"Tsuneyasu Terauchi, Y. Matsuda, K. Araki, K. Seki, T. Okano","doi":"10.7881/DENTALMEDRES.33.68","DOIUrl":"https://doi.org/10.7881/DENTALMEDRES.33.68","url":null,"abstract":": To clarify 1) how the signal fading effect occurs and 2) the diagnostic quality of the signal fading image in caries diagnosis. The Digora Optime (Soredex, Helsinki, Finland) system was used. Aluminum step wedges of 1 to 10 mm thickness and 1-mm-thick lead were used. Exposed photo-stimulated phosphor imaging plates (PSP-IPs) were scanned at six different intervals: immediately, 3, 6, 24, 72, and 144 h. Two kinds of scanning modes were used: with and without auto enhancement correction (AEC). The gray value difference between the immediate and delayed scanning images in the same objective area was calculated as the signal fading effect value (FEV). Thirty extracted upper premolar teeth (carious: 42 surfaces) were used. Immediate, 3, 24, and 72 h delayed scan images were created. Four observers assessed them. The Friedman test was used for statistical analysis and statistical signi ﬁ cance was p <0. 05. Analysis of the without AEC image revealed that the signal fading had the same gray value change. This change was not related to the initial gray value. In the processing of AEC, the middle part of the gray value tended to be more enhanced. Signi ﬁ cant differences in gray value changes were observed after 3 h, but no statistically signi ﬁ cant difference was seen in the caries diagnosis. The area under the receiver operating characteristic (ROC) curve (Az) from immediate, 3, 24, and 72 h delayed images was 0. 61±0. 17, 0. 56±0. 04, 0. 67±0. 04, and 0. 58±0. 06.","PeriodicalId":120057,"journal":{"name":"Dental medicine research","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128723709","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}

引用次数: 2

慢性腎臓病(CKD)患者への歯科薬物療法薬物動態学的考察慢性腎臓病(CKD)患者への歯科薬物療法薬物動態学的考察

Dental medicine research Pub Date : 2013-03-31 DOI: 10.7881/DENTALMEDRES.33.43

庄司山田

引用次数: 0