日本補綴歯科学会雑誌
Online ISSN : 1883-177X
Print ISSN : 0389-5386
ISSN-L : 0389-5386
34 巻, 5 号
選択された号の論文の21件中1~21を表示しています
  • 箕西 敦久
    1990 年 34 巻 5 号 p. 849-859
    発行日: 1990/10/01
    公開日: 2010/08/10
    ジャーナル フリー
    The main purpose of this study is to examine the process of denture plaque formation and relationships between denture plaque and fibronectin.
    Plasma fibronectin has been detected in dental pellicle and dental plaque, and the capacity of the cells to bind gram-positive or gram-negative bacteria was shown. Three types of experimental denture plate were set in oral cavities of subject with normal dentition, for 1, 3 and 6 days. Obtained samples were staining with FITC labeled anti-aerobic bacteria rabbit serum, FITC labeled anti-anaerobic rabbit serum and FITC labeled anti-Candida rabbit serum and each of them were stained with RITC labeled anti-fibronectin goat immunoglobulins. They were observed by fluorescence microscopy. Fibronectin was found on all kinds of experimental denture plate, and existed positions are mainly equal to adherence of aerobic bacteria, anaerobic bacteria and Candida albicans.
    This study shows that fibronectin is significantly related to the formation of denture pellicle and denture plaque. The results play an important role that fibronectin might be correlated to the initial formation of the denture plaque.
  • 藤原 周
    1990 年 34 巻 5 号 p. 860-872
    発行日: 1990/10/01
    公開日: 2010/08/10
    ジャーナル フリー
    The present study was desigend to investigate a distribution type of denture plaques and their structures to Fibronectin (FN) on prosthetic denture fabrication. Double staining method of the direct immunohistochemical fluorescence techique was used to investigate them. The specific antibodies against Candida albicans (Candida), aerobic and anaerobic flora obtained from denture plaque were prepared. These were labeled with fluorescein isothiocyanate by method of Hamajima and Kyogoku. And tetrarhodamine isothiocyanate-labeled antibody to FN (Cappel. Lab.) was used.
    The results were as follows: FN was detected in all of fortyseven samles of dentures. FN was detected conformed in statistically significance at five percent level the basal surface of the denture. Candida was observed on the upper denture especially on palatal fitting surface. statistically (significance at five percent level). Interrelationship between microganisms and FN on all of the denture surfaces was proved significantly at five percent level. A larger areas of FN and microganisms were found in the basal surface of denture than the polishing surface (p=0.05).
    These resalts suggested that FN is significantly related to the formation of denture pellicle.
  • 河野 亘, 田中 昌博, 徳永 徹, 更谷 啓治, 末瀬 一彦, 川添 尭彬
    1990 年 34 巻 5 号 p. 873-877
    発行日: 1990/10/01
    公開日: 2010/08/10
    ジャーナル フリー
    This study was made to measure the food texture, caused the masticatory pain inpatients with craniomandibular disorders.
    The questionnaire was conducted on 40 patients about 33 kinds of food, whether these foods caused masticatory pain or not. The food texture was measured by Texturometer.
    The results obtained were as follows:
    1. The food which caused the masticatory pain in more than half patients were French bread (24 patients) and grilled dried squid (22 patients). On the other hand, foods which caused no masticatory pain were bean curd, jelly and marshmallow.
    2. Food texture mostly related to the masticatory pain was not only hardness but also gumminess, expressed the required force which grind food to the extent of one's swallowable condition.
  • 田中 隆雄
    1990 年 34 巻 5 号 p. 878-891
    発行日: 1990/10/01
    公開日: 2010/08/10
    ジャーナル フリー
    This study was undertaken with intent to seeking a stabile structure in fundamental forms of experimental cast clasp production. Impact forces were served as a model force of the vibration in this study. Impulse responses on the clasps were analysed in frequency domain. In this experiment, fundamental natural mode of vibration which was displacement of each parts of cast clasps was found out.
    The results were as follows: Similar magnification clasps which were three times as large as original one were effective for modal analysis.
    Fundamental forms of experimental cast clasps were steady in impact forces to thickness to width ratio and the base to tip part ratio and the portion the ratio of 2 to 1.
  • 中本 匡美, 玉本 光弘, 浜田 泰三
    1990 年 34 巻 5 号 p. 892-895
    発行日: 1990/10/01
    公開日: 2010/08/10
    ジャーナル フリー
    Yeast lytic and fugicidal effects of four denture cleansers containing enzymes (A, B, C and D) and one denture cleanser without enzyme (E), and yeast removing ability from acrylic resin plates of these cleansers were studied. The results obtained were as follows:
    1. Treatments with denture cleanser for two hours demonstrated that B, C and D had yeast lytic ability, and A and E had yeast lytic ability slightly.
    2. The time for sterilizing of 1.5×107 cells/ml of Candida albicans by cleansers B, C, D and E were 5, 30, 5 and min respectively. After two hours treatment with cleanser A, numbers of survived cells were 5.5×106 cells/ml.
    3. Five denture cleansers tested had strong removing ability of Candida from plates.
  • 第4報金属・陶材の経時的温度上昇傾向について
    塩野 英昭, 相沢 一郎, 山崎 大介, 阿佐 正一郎, 五十嵐 孝義
    1990 年 34 巻 5 号 p. 896-901
    発行日: 1990/10/01
    公開日: 2010/08/10
    ジャーナル フリー
    The porcelain sintering on “Technomat” is considered to start from the metalceramic interface and proceeds to the surface of porcelain.
    The purpose of this study is to compare the thermal rising character of metal-ceramic specimen on “Technomat” and conventional furnace.
    A metal specimen without porcelain and a specimen with 0.5mm opaque and 2.5mm body porcelain powder, were arranged on the tray in each muffle. Three thermal couples (1.0mm wide, 0.15mm thick, CA thermal couple JIS) were set into the specimens (one thermal couple on the metal: 1 channel, one into the metal-ceramic interface: 2 channel and one into the body porcelain powder: 3 channel respectively).
    Normal firing procedure of each furnace was executed, while each thermal couple's change in temperature was recorded on Data Collector AM 7001 (Anritsu Co.). And we obtained the follwing results.
    1. On “Technomat” the temperature at the metal-ceramics interface (2 CH) during firing procedure was always higher than that of porcelain powder (3 CH) at the same time.
    2. As for the conventional furnace “Ace”, the temperature of metal (1 CH) and porcelain powder (3 CH) generally coincide during firing procedure. The temperature of metal cerami interface (2 CH) was always lower than that of porcelain powder (3 CH).
    3. Measurement of the metal-ceramic specimen's change in temperature during firing procedure revealed the differences of the heating character between two furnaces.
  • 福田 順直, 吉田 和也, 井上 宏, 諏訪 文彦, 太田 義邦
    1990 年 34 巻 5 号 p. 902-908
    発行日: 1990/10/01
    公開日: 2010/08/10
    ジャーナル フリー
    To elucidate a safe and accurate method for inserting an EMG electrode into the superior head of the lateral pterygoid muscle (SLP), the anatomical relationship between the maxillary artery and SLP was examined, and the direction and distance of the EMG electrode inserted via an intra-oral route were measured in 22 human cadavers.
    An intra-oral approach was better than an extra-oral approach, because the maxillary artery generally ran laterally in close relation to the SLP. To avoid injuring the maxillary artery, the electrode should be inserted through the mucobuccal fold around the distal root of the upper first molar. The optimal angle of the electrode against the Camper plane was approximately 40° upward. As well against the sagittal plane was approximately 7° outward. The optimal distance from the intra-oral inserting point to the muscle was 40-45mm.
    Although these findings are useful for recording EMG activity of this muscle, it is necessary to consider carefully various differences in recording sides, sex and dentition of upper molars.
  • 川畑 直嗣, 綾部 夏樹, 鎌下 祐次, 斉藤 福一郎, 河野 弘, 濱野 徹, 長岡 英一
    1990 年 34 巻 5 号 p. 909-920
    発行日: 1990/10/01
    公開日: 2010/08/10
    ジャーナル フリー
    The purpose of this study is to apply an image analysing system to making a diagnosis of the position of the artificial teeth on edentulous casts in the procedure of complete denture fabrication. Both the upper and lower casts, with the outline of denture base and the line drawn along the center of posterior ridge, were mounted by the split cast method on the average value articulator which had the reference lines for surperimposing some images. And then the artificial teeth were set up in the wax rim on these casts. Two kinds of images about both the casts themselves and the wax dentures on the casts were taken by color camera in the conditions of being removed from the articulator and mounted on it. We could examine the relation of horizontal position between the upper and lower alveolar ridges, and also the horizontal position of the artificial teeth on each upper and lower cast.
    As a result, it was concluded that the image analysing system was useful to set upcorrectly the artificial teeth on the edentulous casts in complete denture fabrication.
  • 第1報前方滑走運動時における臼歯部の対合関係
    岩片 信吾
    1990 年 34 巻 5 号 p. 921-928
    発行日: 1990/10/01
    公開日: 2010/08/10
    ジャーナル フリー
    Subjects who have skeletal class III malocclusion must have both the occlusion and jaw movements evaluated before treatment. Their three-dimensional features, however, have not been clarified. I therefore investigated their protrusive excursion and the occlusal relationship of molars, from a three-dimensional standpoint.
    Regarding this movement, I measured the inclinations of the incisal and condylar paths in seven subjects. Regarding this occlusal relationship, I measured the distance between each cusp-tip of the lower molars and its opposing surface in both the intercuspal position and the protrusive occlusal position.
    The results were as follows: 1) the sagittal inclinations of the paths were gentler than those of normal subjects, on average, 2) the distance between the cusp-tip and its opposing surface tended to be greater than those of normal subjects in the intercuspal position. In the protrusive occlusal position, however, there was no significant difference in the distance between the cusps in the two groups.
    The results mentioned above show that among the subjects examined there were no excessive disclusion of molars in the protrusive occlusal position, which was attained by gentle inclinations of both the incisal path and the condylar path.
  • 角田 淳
    1990 年 34 巻 5 号 p. 929-943
    発行日: 1990/10/01
    公開日: 2010/08/10
    ジャーナル フリー
    This study was made a view to establishing clinical procedures enabling us to make color reproduction of the ceramometal restorations more objectively, using three kinds of porcelain Vita shade guides, two kinds of Ni-Cr ceramo-alloys and two kinds of vacuum-fired porcelains of Vita ceramo-shade, photoelectric colorimetrical measurements were made of the color of commercially available shade guides, which were fundamental in color selection, and then researches were made of possible factors influencing the color in the process of preparing ceramometal restorations, and further more studies were made of the color reproductivity of the finished ceramometal restorations and the above shade guides.
    The results obtained were follows ; Correlation between the color of shade guides and the shade was observed for x, y value of chromaticity, but not for Y value of lightness. A color difference of 1.9 to 8.4 was observed with reference to the color reproductivity after finishing the fusion of porcelain and of shade guides, suggesting that the kind of shade guides in color selection, the kind of porcelain at the stage of fusing porcelain and the opaque porcelain thickness had an important significance in the color reproductivity of ceramometal restorations.
  • 第1報特に食品咀嚼状況と義歯の清掃を中心に
    権田 悦通, 柿本 和俊, 柴田 正子, 柏村 武司, 松山 博史, 以倉 完悦, 三ケ山 秀樹
    1990 年 34 巻 5 号 p. 944-952
    発行日: 1990/10/01
    公開日: 2010/08/10
    ジャーナル フリー
    Statistical studies of bimaxillary edentulous patients were completed by reference to the “Patient treatment record for complete denture” of 497 edentulous patients examined in the Osaka Dental University Hospital for 6 years from 1984 to 1989.
    The results obtained were as follows:
    1. The patients were 200 males and 297 females. The mean age was 70.0 years.
    2. In these studies, 45.4% of patients had general disease, of which hypertension was prevalent.
    3. More than half of patients had the complaints about retention and stability or mastication for old denture.
    4. More flabby gums were recognized in anterior portion of upper ridge.
    5. Before making new denture, 37.6% of patients were treated by tissue conditioning, and 39.6% of old dentures were repaired of modified.
    6. The patients, having old dentures with resin teeth in posterior, were more generally increased occlusal vertical dimensions in making new denture than with porcelain teeth.
    7. For some foods, the ratio of patients who can eat with old dentures varied with whether patients had complaint about mastication or not.
    8. After being applied new dentures, patients who can eat various food increased day by day.
    9. Patients who clean denture above three times per day, increased after being applied new dentures. More than half of patients used tooth brushes in cleaning denture.
    10. In sleeping at night, 58.4% of patients didn't wear the dentures. This percentage increased to 76.6% after being applied new dentures.
  • 支台装置の位置関係と適合度による評価
    小椋 直樹
    1990 年 34 巻 5 号 p. 953-967
    発行日: 1990/10/01
    公開日: 2010/08/10
    ジャーナル フリー
    The accuracy of fixed partial dentures was examined from the point of view of three dimensional displacement of each abutment and fitness of abutment to each tooth.
    Using a newly developed metal die system, two types of fixed partial dentures (soldering type and one piece casting type) were made, and the accuracy of them was measured.
    Conclusions were as follows:
    1. In both type of fixed partial dentures, the distance between two abutments had a tendency to shorten. The each coronal axis of the abutments had a tendency to incline mesiodistally and get near at the occlusal surface side.
    2. The distortion of the soldering type had a tendency to be less than that of the one piece casting type.
    3. The distortion of the soldering type was mainly affected by soldering.
    4. Seating of fixed partial dentures was more affected by fitness of abutment to each tooth than by three dimensional displacement of each abutment.
  • 第1報音声認識装置の有効性について
    市場 裕康, 中原 信光, 薦田 淳司, 堀内 政信, 市川 哲雄, 佐藤 修斎, 羽田 勝, 松本 直之
    1990 年 34 巻 5 号 p. 968-977
    発行日: 1990/10/01
    公開日: 2010/08/10
    ジャーナル フリー
    To assess speech disturbances caused by newly made prostheses, visual and acoustical methods, palatograms, sound spectrograms, etc., have been used. But the analysis and assessment requires somewhat professional knowledge and experience and much time, so such methods are not necessarily easier, and have the defect of being somewhat subjective.
    The purpose of this study is to develop a new speech test that is easy to use and more objective using the speech recognition unit.
    First, experimental palatal plates were made for a dentulous subject, and the utility of the speech recognition unit was estimated.
    The speech recognition unit and ordinary hearing were compared in utterance of ten Japanese monosyllables, /sa/, /ta/, /ki/, /hi/, /si/, /ci/, /ni/, /mi/, /ri/, /cu/.
    Results:
    1. The speech recognition unit made mistakes similar to ordinary hearing.
    2. The recognition point that is output by the speech recognition unit corresponded well to speech clarity except some cases.
    3. The speech recognition unit could detect the changes of consonant frequencies relatively well.-
  • 吉田 圭一, 松村 英雄, 田中 卓男, 熱田 充
    1990 年 34 巻 5 号 p. 978-985
    発行日: 1990/10/01
    公開日: 2010/08/10
    ジャーナル フリー
    Chemical composition of four commercially available light-cured opaque resins was investigated and properties of the resins; depth of cure, amount of residual monomer eluted from these materials and shear bond strength were evaluated. Monomer part of the opaque resins consisted of methyl methacrylate (MMA), di (methacryloxyethyl) trimethylhexamethylene diurethan (UDMA), neopenthylglycol dimethacrylate (NPG), triethyleneglycol dimethacrylate (3 G), 2, 2-bis (4-methacryloxypolyethoxy phenyl) propane (2.6 E) and 2, 2-bis [4-(3-methacryloxy-2-hydroxy propoxy) phenyl] propane (Bis-GMA). Inorganic filler content of the materials were in the range of 48 to 96 wt%. Two opaque resins showed large ash content. The shape of the filler was the splinter large fillers and the size was about over 10 μm. Within the three MMA-based opaque resins, depth of cure increased with decrease in MMA content of monomer composition, while amount of residual monomer opposed. The bond strengths of three opaque resins joined to alumina-blasted and heated Au-Ag-Pd alloy were 12 to 13 MPa after 5, 000 thermocycles. However, the one resin showed 0 MPa. These results suggest that it should be necessary to improve the bond strength, photo-curability and handling properties of the opaque resins, and to examine the optimal composition of the light-cured opaque resin.
  • 剪断および引張り強度試験法の確立とSEM観察による試料表面性状
    山下 正博, 児玉 浩, 河合 麻理子, 栄山 聖, 根橋 信幸, 山崎 大介, 柳沢 勉, 風間 泰昌, 長光 靖夫, 金子 行夫, 佐藤 ...
    1990 年 34 巻 5 号 p. 986-995
    発行日: 1990/10/01
    公開日: 2010/08/10
    ジャーナル フリー
    The purpose of this study is to establish the measuring methods for shear and tensile bond strength of the “Dicor” castable ceramics cemented to bovine teeth substituted for human teeth utilized the “Dicor” Light Activated Cement, and to observe the surface of this ceramics treated for bonding by scanning electron microscope.
    Results and conclusions that can be obtained from this study are:
    1. The methods introduced in this study are useful for measurement of shear and tensile bond strength for the Dicor castable ceramics and the other dental restorative materials as well.
    2. The surface of this castable ceramics after ceramming is covered by white layer with a thickness of approximately 50um, and the microstructure of this layer is different from of the original tetrasilicic mica crystal ceramics.
    3. The special surface with from 1 to 3um square cylinderical crystalline being high acidresisting is revealed by etching of this white layer, and from 1 to 3um mica crystal on the o riginal layer.
    4. This square cylinderical crystalline is developed from the surface to the inside through the white layer during ceramming, and the longest cylinderical crystalline is reached about 100μm length.
    5. This square cylinderical crystalline might be one of the most important factors influencing the bond strength of the Dicor Light Activated cement.
  • 第1報前歯の耐摩耗性について
    佐藤 吉則, 大谷 賢二, 前島 健吾, 森川 正朗, 松津 雅道, 永井 栄一, 豊間 均, 大木 一三, 西山 實
    1990 年 34 巻 5 号 p. 996-1001
    発行日: 1990/10/01
    公開日: 2010/08/10
    ジャーナル フリー
    High-strength denture teeth (hereafter referred to as HS teeth) were developed to improve hardness and wear resistance of the conventional plastic denture teeth, while retaining their feature of easy occlusal adjustment.
    The objective of this study was to evaluate wear resistance of HS teeth. We conducted the wear test and measured surface roughness, using six types of anterior artificial teeth; ie.three types of HS teeth and three types of conventional plastic denture teeth (hereafter referred to as PL teeth) which served as the control.
    The result of the toothbrush abrasion test revealed that the HS teeth have about 5 times grater wear resistance than the conventional PL teeth. It was also found out that the type of artificial teeth and the number of wear-testing strokes made a significant influence on the surface roughness of artificial teeth.(P<0.05)
  • 西崎 宏, 大井 治正, 吉峰 茂樹, 小川 陽一, 吉田 清彦, 川野 晃, 兼平 治和, 前田 照太, 江藤 隆徳, 井上 宏
    1990 年 34 巻 5 号 p. 1002-1007
    発行日: 1990/10/01
    公開日: 2010/08/10
    ジャーナル フリー
    The purpose of this study was to propose the image analysis of the retentive area in removable partial denture by personal computer instead of surveyor.
    1. The image through CCD TV camera was processed on personal computer to recognized the shadow as the undercut area on the abutment teeth in removable partial denture. The binary processed image was reversed and added to the original one. The threshold level of digital processing was determined by density histogram of primary colors.
    2. The lines drawn by Laplacian emphasis corresponded to survey lines.
    3. The light was directed toward perpendicular to occlusal plane of the cast by the reflection of the mirror. The path of placement and removal was alternated by changing the inclination of the mirror. The distribution of undercut area on abutment teeth could be found repeatedly at different angles and the retentive areas in common to mesial and distal directions could be found by image calculating.
  • 大前 泰三, 田中 孝一, 吉川 健司, 石垣 尚一, 赤西 正光, 丸山 剛郎
    1990 年 34 巻 5 号 p. 1008-1014
    発行日: 1990/10/01
    公開日: 2010/08/10
    ジャーナル フリー
    The purpose of this study is to reveal the relationship between the head position, and the head and neck muscles. At right and left tilting head positions in seated and standing, the activities of masseter, anterior temporal, posterior temporal, anterior digastric, sternocleidomastoid and trapezius muscles of twenty normal subjects were investigated electromyographically during clenching, tapping and chewing.
    The results obtained were as follows;
    1. During clenching in seated, the activities of masseter and trapezius muscles on the opposite side of the tilting side, and sternocleidomastoid muscle on the tilting side were increased.
    2. During clenching in standing, the activities of masseter and trapezius muscles on the opposite side, and anterior temporal, posterior temporal and sternocleidomastoid muscles on the tilting side were increased.
    3. During tapping in seated, the activities of posterior temporal and trapezius muscles on the opposite side were increased.
    4. During tapping in standing, the activities of posterior temporal and anterior digastric muscle on the opposite side, and sternocleidomastoid muscles on the tilting side were increased.
    5. During chewing in seated, the activities of masseter, anterior temporal, posterior temporal, anterior digastric muscles on the opposite side were increased.
    6. During chewing in standing, the activities of sternocleidomastoid muscle on the tilting side were increased.
  • 関口 幸治
    1990 年 34 巻 5 号 p. 1015-1025
    発行日: 1990/10/01
    公開日: 2010/08/10
    ジャーナル フリー
    The purpose of this study is to investigate the influence of the shape of palate and the viscosity of intervening liquid (saliva) on the denture base retention.
    16 healthy subject, 14 males and 2 females (23 to 28), was selected for this study. The shape of palate were divided into three types, using 3-dimension measure analyzer.
    Additional subjects who have palatine torus took part in this study. Palatal base for experiment was fabricated on the working cast. The retention of the palatal base was measured by retention measure device. The viscosity of the intervening liquid was also take.
    The results were as follows:
    1. There was a positive relationship between the viscosity of glycerine liquid and the retention of palatal base.
    2. There was a positive relationship between the viscosity of mixed saliva and the retention of palatal base.
    3. In case of the deep shape of palate, the retention per unit showed small value.
    4. If the viscosity of the intervening liquid were same, the retention per unit showed constant value.
    5. In case of the palatine torus, the retention showed small value.
  • 野田 高史
    1990 年 34 巻 5 号 p. 1026-1038
    発行日: 1990/10/01
    公開日: 2010/08/10
    ジャーナル フリー
    This study was undertaken with the intent of seeking the structural stability in connection parts of various formes of experimental one-piece cast bridge prosthetics. It is well known that connection parts of bridge is infuluenced by the factor of stress concentration. The mastication force was occasionally considerd as a collision force, so the impact forces were served as a model force of the vibration in this study. Impulse responses from the bridge using RION PV-90 B pick up was analysed in terms of frequency domain. In this experiment, it is important that in stead of static addition of force, dynamic vibration was employed.
    The results were as follows; Peak frequency on 4 modal sections was appeared by free supporting method. Impulse response was influenced by the connection parts of various forms in frequency domains.
  • 十河 基文, 岡田 政俊, 瀬谷 直也, 前田 芳信, 野首 孝祠, 奥野 善彦, 堤 定美
    1990 年 34 巻 5 号 p. 1039-1043
    発行日: 1990/10/01
    公開日: 2010/08/10
    ジャーナル フリー
    Damaged or worn down acrylic denture teeth are often repaired using a self-curing acrylic resin or a composite resin. Recently hard type acrylic (HA) artificial teeth have been used clinically because of higher wear resistance.
    In some cases, however reconstruction of the HA denture teeth are still needed. Inthis study, we tried to find an effective treatment method for repairing damaged surfaces of HA denture teeth with a light curing composite resin which has good wear resistance and better chance of manipulation. The shear bond strength of a light curing composite resin to HA denture teeth, was evaluated after applying to bonding surface, four different agent and their combinations. They were an etching (E), an organic solution (Rebase Aid; RA), a silanecoupling agent (Porcelain Liner M; PL), and a bonding agent (B), combinations were E+B, E+RA+B, E+PL+B and E+RA+PL+B.
    As the result, maximum strength was obtained E+RA+PL+B, about 130 kgf/cm2. According to our results, clinically damaged or worn down HA denture teeth should be repaired with a light curing composite resin after occlusal surface treatment with an etching, an organic solution (RA), a silanecoupling (PL) and a bonding agent.
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