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エチレンオキサイドガスによるラバーダムシートの消毒について
Get PDFapplication/pdfThe use of ethylene oxide to disinfest rubber dam material before its use was studied. 1. Small pieces of rubber dam materials (10mmx5 mm) were contaminated with Escherlichia colt (0-25), Staphylococcus aureus (FDA 209 P) or Lactobacillus casei (ATCC 1469). These contaminated pieces were inserted into a stack of 20 rubber dam sheets and the entire stack was sterilized with ethylene oxide. After sterilization, the contaminated pieces were taken from the stack of dam sheets and cultured in brain heart infusion broth. The rubber dam materials tested were products of W, H and S, and their thickness were medium. Using S1 s, there was a positive culture out of 1140 contaminated pieces in the middle of 20 rubber dam sheets. 10 out of 1140 pieces on W- s and 9 out of 1140 pieceson H's also yielded positive cultures. These pieces were in the middle two-third of the stack of 20 rubber dam sheets. 2. The tensile test was done to determine whether sterilization with ethylene oxide adversly affected the rubber dam materials. There were no difference between pre-and post-sterilization in the rubber dam materials of W or H. After sterilization, S's became deteriorated slightly.journal articl
術後性上顎嚢胞の臨床統計的分析
Get PDFapplication/pdfThe results of a clinical analysis of 46 postoperative maxillary cysts treated in our clinic from 1975 to 1986 were obtained as follows : 1) As to sex, the sample shows a slight male predominance, 61% male versus 39% female. 2) Age distribution ranged from 30 to 40 years, and the mean age was 38 years. 3) Most of the patients had undergone a maxillary sinuectomy 17 years ago in the average. 4) There was no significant difference in the proportion of the number of affected sides. 5) The most frequent clinical symptom was a swelling of the buccal area. 6) According to the operative findings, 48% lower type and 46% whole type in the sinus were diagnosed, and most of them were unilocular in form. 7) When necessary, the method of injecting a radio-opaque contrast medium into the cyst was employed. As a result of this, it became clear that this method is useful in examining the shape, and position of the cyst in the sinus.journal articl
昭和59年における冠・架工義歯補綴に関する統計的観察その2 架工義歯について
Get PDFapplication/pdfA study was made of 351 bridges which were fabricated for patients at the Prosthodontic Clinic of Matsumoto Dental College during 1984. Some of the results were as follows: 1) 46.15% of the patients were males and 53.85% were females. 2) 91.74% of the patients were between 20 and 59 years old. 3) 76.64% of the bridge were fabricated as 3-unit bridges; and 4) 90.31% were fabricated as 1-pontic bridges. 5) There were fewer bridge retainers for the lower anterior segment than for other segments. 6) 62.20% of bridge retainers were fabricated as full cast crowns; and 7) 49.06% were fabricated for vital teeth. 8) Of pontics, 32.73% were replaced for the lower molar segment. 9) Compared with a similar study in 1983, the number of bridges decreased by 21.journal articl
リン酸塩系埋没材について(その7)歯科鋳造用埋没材の再利用について
Get PDFapplication/pdfPhosphate bonded investments were set by reaction between metal oxide and phosphate. Setting time, setting expansion and compressive strength were affected by the particle size, and content of metal oxide and phosphate. The pH of the slurry changed during the reaction from neutral to alkaline. Reusage of phosphate bonded investment material was studied from the stand point of environmental contamination. Used investment materials were added 5, 10 and 15% to four kinds of phosphate investment products. The effects of addition to each phosphate investment product were measured for setting expansion, compressive strength and casting accuracy. Results were as follows: 1) Setting expansion decreased due to the addition of used investment materials of GC, FU and SO investment material. 2) Heat expansion increased due to the addition of used investment materials of GC, FU and WM investment material. 3) Compressive strength increased due to the addition of used investment materials of GC, SO and WM investment material. 4) The addition of used investment materials to GC and WM investment material did not affect the casting accuracy. However when added to SO and FU investment material, the casting accuracy was not satisfactory.journal articl
ホルマリン・グアヤコールを根管消毒剤として使用した臨床成績について 第2報 : 臨床実習での応用
Get PDFapplication/pdfIn 317 cases of pulpectomy and infected root canal treated by intern students, Formarin-Guaiacol "NEO" (FG) was used as disinfectant in the root canal until the root canal filling was completed. The results obtained were as follows: 1. In pulpectomy cases, all cases progressed favorably during the term of root canal treatment. 2. Spontaneous pain happend in 2 cases out of 187 asymptomatic chronic apical periodontitis cases. It was thought that these spontaneous pains were caused by overinstrumentation of root canal preparation. 3. It was recognized that the results obtained in this clinical study were almost the same as the results we previously reported.journal articl
Preparations for Endosseous Implants. Part 2. : Laying stress on the method of measuring the efficiency of the insertion guide
Get PDFapplication/pdfAs a preparation for endosseous implants, we determined the occlusal relationship after fixing superstructures in a study cast, on examination of the positions and bearings of inserted implants. We then made up a guide to put it to practical use in the oral cavity, and gained clinically good results. We picked two cases out of the latest implanting data and examined the study cast in occlusal bearing and the post-operative cast in three bearings; (occlusal, buccal and distal). As a result, this method could be considered suitable for measuring the efficiency of the guide. In measuring it, the fact that an inserting position of implant was displaced 1mm (at the maximum) to mesio-distal and about 0.3mm bucally was recognized. Planting direction inclined approximately 4.5° (at the maximum) to mesio-distal and approximately 3° bucally.journal articl
無歯科医地区町立診療所(福井県今庄町)における歯科診療実態調査報告
Get PDFapplication/pdfThe contents of dental examinations and treatment in the town clinic in Imajo-cho, Fukui Prefecture, Japan, a rural village lacking dentists were investigated from April 1985 to March 1986 and the results were as follows : 1. The consultation rate of the children under 10 and teenagers as out patients was higher than that of other generations. 2. On the replacement of the lost natural tooth, the cases of denture and repaired denture were larger in number than those of bridgework. 3. There was also a considerable number of treatments in pedodontics, oral surgery, restoration, and endodontics, 4. The number of out patients was on the average 30. 6 a day. This shows that area residents feel the need for dental care. 5. From the above four points, it is suggested that we have contributed to the maintenance and improvement of oral health of the area residents in Imajo-cho.journal articl
カエルの舌粘膜の表層ホスファターゼ活性表層アルカリ性ホスファターゼ活性
Get PDFapplication/pdfProperties of alkaline phosphatase activity in the mucous membrance of the frog tongue were studied by applying test solutions containing β-glycerophosphate to the tongue surface of intact frogs. The properties of the alkaline phosphatase activity was found to be different from the properties of the ATPase activity described in the previous paper, suggesting both the ATPase and the alkaline phosphatase being different enzymes.journal articl