Matsumoto Dental University Repository
Not a member yet
2206 research outputs found
Sort by
感染防止対策としての診療用エプロンの使用 第2報 生地の素材の違いによる耐久性の比較とデザインの変更について
Get PDFapplication/pdfAs an infection control measure, a new 65% polyester/35% cotton blend operating apron was used and compared with the 100% cotton apron we usually use. The period of use was approximately 10 months for each type of apron. The experiment was carried out to compare between the durability and any other points of difference of the two types of aprons as well as to investigate into future apron design. The results were as follows: 1) The 65% polyester/35% cotton blend apron showed less discoloration by sodium hypochlorite solution than did the 100% cotton cloth aprons. 2) All of the 100% cotton aprons (N=48) remained stained while 57 of the 60 aprons made of 65% polyester/35% cotton blend remained stained. 3) The fibers of the 100% cotton aprons (N=48) became frayed and had holes. None of the 60 65% polyester/35% cotton blend aprons became frayed or had holes. 4) The 65% polyester/35% cotton blend apron showed excellent durability and cleanliness properties. 5) It is necessary that the design of the operating apron be changed to thoroughly cover the arms and neck, and to have enough length to cover the knees when the operator is seated on an operating stool.journal articl
中国石家荘市小児の乳歯列形態 第三報 : 上顎乳臼歯歯冠形態の調査研究
Get PDFapplication/pdfThe objectives of the present study were to investigate the crown morphology of maxillary deciduous molars in Chinese children and to compare it with those previously reported for different races. The results were as follows: 1) Regarding the occlusal surface pattern of m^2, 78.8% showed type 4, 19.4% type 4-, and 1.8% type 3+B. As in previously studies, teeth with four cusps were the most frequenctly seen. The frequency of the occlusal surface pattern of m^1 was 40.5% type 2, 37.8% type 3M, 11.9% type 3H, 7.0% type 4-, and 2.8% type 4. As in previous Japanese studies, three cusps were most frequenctly seen for this tooth. 2) The frequency of Carabelli's cusp was 52.5% (pit: 47.5%, cusp: 5.0%) for m^2 and 17.6% for m^1, and all cusps were classified as showing rudimentary developmental state. 3) The respective frequency in m^2 and in m^1 of Protoconule was 43.8% and 2.9%, of Metaconule was 43.0% and 18.9%, of Mesial tubercle was 39.4% and 12.7%, and of Crista obliqua was 95.1% and 2.0%. Lunate ridge was seen in 9.5% of m^2. The frequency of Cingulum on m^1 was 16.5%.journal articl
歯科用X線フィルムの電子保管のための画像評価 第一報 デンタルX線フィルムの画像評価
Get PDFapplication/pdfA comparative study of CRT images with the original radiograph for use in digitized image archiving and reference was carried out. Using a small image processing system with a penetration pattern scanner, a dental radiograph was digitized. The digitized image was then displayed on a CRT monitor. The original dental radiograph and this digitized image were visually evaluated using 5 anatomical landmarks, and the evaluation scores were then statisticaly compared. The quality of the digitized image was equaly to good or slightly poorer than that of the original dental radiograph. It is suggested that the slightly poorer digitized image quality might be compensated for by appropriate selection of the input characteristics of the scanner or original X-ray condition.journal articl
歯科補綴物の3次元寸法精度に関する研究 : 歯科技工士の3次元再現精度について
Get PDFapplication/pdfEven though it is projected that the dental prosthesis will soon be manufactured with CAD/CAM technology, the three-dimensional accuracy of dental prosthesis construction using this technology is not known. We requested each of 5 dental technicians to produce 3 model teeth under each of the following three conditions: the original tooth measurement by visual inspection; the original tooth measurement with calipers; and in the absence of the original tooth, tooth measurement by extrapolation from the existing opposite and adjacent teeth. The reproduced teeth were measured with a laser displacement meter, and the results compared with the original tooth. It was found that the reproduced teeth constructed based on the visual inspection had error of distance of about 500μm. The error of distance was not reduced when the measurement was made using calipers. In general, reproduced teeth made by the dental technicians were deformed. When the technicians attempted to reconstructor eliminated tooth, the error of reproduction increased to about 1000μm.journal articl
20%グアヤコール配合ヨウ素ヨウ化カリウムパスタの歯周ポケット内投与に対する臨床効果
Get PDFapplication/pdfIn this study, we evaluated the effectiveness intra periodontal pocket insertion with IG paste containing 20% guaiacol using gingival index (GI), probing depth (PD), plaque control record (PCR), bleeding index (BI) and quantity of gingival crevicular fluid (GCF). The subjects were 59 outpatients of the Department of Periodontics, Matsumoto Dental College who had no systemic disease and had not been administered antibiotics during the past month. Teeth that occupied nearly symmetric positions of the same mouth, had been affected by gingivitis or periodontitis, had a probing depth of 3-6mm, and had been bleeding in at least 1 of 4 tooth planes were studied. IG paste was applied to the periodontal pockets of the teeth of the IG group once a week for 4 weeks, and clinical parameters were compared with those in the untreated control group. 1) Improvement in the probing depth was significantly greater (p<0.01) in the IG group than in the control group after the 4 weeks treatment. 2) The improvements in the quantity of gingival crevicular fluid was significantly greater (p<0.01) in the IG group than in the control group after the 4 weeks treatment. 3) The improvements in the bleeding index was significantly greater in the IG group than in the control group throughout the treatment period (p<0.05-0.01). 4) No side effects were observed during the study. These results indicate that local application of IG paste is effective for th e prevention and treatment of periodontal disease.journal articl
