巻号一覧
59 巻 (1992)
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59 巻, 1 号
選択された号の論文の22件中1～22を表示しています
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高木 実1992 年 59 巻 1 号 p. 1-10
発行日: 1992年
公開日: 2010/10/27
ジャーナル フリーPDF形式でダウンロード (2031K) -
ブリッジおよび可撤性義歯北崎 祐之, 松井 裕子, 埴 英郎, 鈴木 乃里子, 土田 幸弘, 大石 達也, 浜野 英也, 井上 昌幸1992 年 59 巻 1 号 p. 11-20
発行日: 1992年
公開日: 2010/10/27
ジャーナル フリーThis is a continued report on the statistical classification of the prosthetic restorations placed in the outpatients in the Tokyo Medical and Dental University Hospital. The data were collected from the laboratory records during the period of January to June of 1986.
The results are summarized as follows:
1. Total of 419 bridges, consisting of nearly the same number in the maxillary and mandibular units, were fabricated. A wide variety of designs was observed for those not covered by the health insurance.
2. Approximately 83% of the 265 complete dentures were covered by the health insurance. The number of the maxillary units was slightly more than that of the mandibular units, which was similar to the data collected about 20 years ago.
3. Seven hundred and fifty-four partial dentures were placed and approximately 45% of these were covered by the health insurance.
4. Various designs were observed in the 'Konus-Kronen' type of prosthesis. They were assumed to be applied not only for the restoration of the edentulous areas, but also for the splinting of the remaining teeth.
5. Fixed bridges were placed in more than 90% of the cases with single tooth loss. However, partial dentures were more frequently used than the fixed bridges for the restoration of the two-tooth loss.抄録全体を表示PDF形式でダウンロード (1990K) -
宮本 貴夫1992 年 59 巻 1 号 p. 21-32
発行日: 1992年
公開日: 2010/10/27
ジャーナル フリーTransferrin receptor (TfR) is found in the vigorous proliferating cells. The author performed an immunohistochemical study on the TfR expression in the oral tissues and a flow cytometric analysis of TfR in the Hela cells with and without an anticancer drug (CDDP) .
Immunohistochemically a strong reaction of the TfR was clearly found in the basal and parabasal layers of the normal epithelium and malignant tumors but rarely found in the benign tumors.
In the well differentiated carcinomas, the degree of staining was not so high as compared with the poorly differentiated ones.
The fluorescence intensity of the cells in the CDDP 0.5. μg/ml group was not different from that in the control group. The intensity in the 1.0. μg/ml, 24 hr group was almost the same as that in the control group, but in the 1.0. μg/ml, 48 hr group a decrease of 18% and in the 72 hr group a decrease of 23% were observed. The intensity in the 2.0. μg /ml, 24 hr group decreased by 10%, and in the 2.0. μg/ml, 48 and 72 hr groups, it decreased more radically but a number of dead cells was recognized. From these results, the quantity of the TfR seemed to be parallel to the degree of the proliferative ability of the cancer cells.
Examination with TfR can be helpful for the diagnosis and the determination of the therapeutic effect on oral cancer.抄録全体を表示PDF形式でダウンロード (6058K) -
小久保 俊一1992 年 59 巻 1 号 p. 33-47
発行日: 1992年
公開日: 2010/10/27
ジャーナル フリーThe castability of the crown margins was studied. The smoothness and quantitative measurement of the margins were compared with the original wax patterns and their casted products. Wax patterns of the plate and crown forms were fabricated with sharp, straight and even margins. Margin angles of the wax patterns were prepared at both 20 and 40 degrees for the plate type and 20 degrees for the crown type samples.
Each wax pattern was casted with Type IV gold alloy and gold-silver-palladium alloy. The casted margins were evaluated by comparing them with their original wax patterns.
The results were as follows:
1. Compared to the current procedure, more precise evaluation of the marginal castability is now possible with this new method.
2. The shortness of the margins was observed in all of the casted samples. Casted samples with 20-degree margins resulted in twice as much deficiency as compared to those with 40-degree margins.
3. The smoothness and evenness of the margins were inferior in all of the casted samples when compared to their original wax patterns.
4. The margin thickness was between 50 and 70. μm when the wax patterns with sharp margins were casted.
5. A certain thickness is required at the margins of the wax patterns in order to achieve precise casted margins. In this study, it was found to be 79.1. μm.抄録全体を表示PDF形式でダウンロード (12093K) -
若林 則幸1992 年 59 巻 1 号 p. 48-67
発行日: 1992年
公開日: 2010/10/27
ジャーナル フリーthe upper complete denture bases made by superplastic forming of Ti-6A1-4V alloy plates which have various thicknesses.
The strength of the denture base made by superplastic forming using the 0. 55 mm thickness plate was lower than that of the base made by Co-Cr alloy casting in the standard form when loaded on the hard metal board. But by increasing the thickness by partial or full diffusion bonding of two Ti-6A1-4V alloy plates, the denture base became stronger than the Co-Cr alloy base.
With resin occlusion rims, all the denture bases were reinforced. Morever, when loaded on the mastermodel covered with rubber in the residual ridge and palate area, the difference of the strain between the thin and the thick bases became small. However, the strain of the thin base increased particularly when the base had a contact with the mastermodel on a small area in the palate.
The superplastic forming denture bases revealed a high adaptability with the space less than0 . 13 mm on the average between the base and the mastermodel. And increasing the thickness of the base prevented the worsening of the adaptability after curing resin for the denture.抄録全体を表示PDF形式でダウンロード (7786K) -
岡田 昭五, 米満 正美, 川口 陽子, 大原 里子, 佐々木 好幸1992 年 59 巻 1 号 p. 68-74
発行日: 1992年
公開日: 2010/10/27
ジャーナル フリーThis study was carried out to contrive a screening level and select high-caries-risk schoolchildren by using the number of dmft in the deciduous canines and molars at 6 years of age. The screening level was established at 9 dmft by analyzing the longitudinal caries data from 119 primary schoolchildren in Tomisato, Chiba Prefecture.
Thirty-three percent of the high-caries-risk children, selected by the application of this screening level to the other three primary schools, were predicted that the mean number of DMFT would be 6 or more at 11 years of age.
However, this screening level was not available for the two schools which had been adopting a fluoride mouth rinsing program because of their low caries experience at 11 years of age.抄録全体を表示PDF形式でダウンロード (1288K) -
杉山 栄一1992 年 59 巻 1 号 p. 75-87
発行日: 1992年
公開日: 2010/10/27
ジャーナル フリーIn order to investigate the polymorphonuclear leukocyte-mediated oral keratinocyte injury, the author established a method to culture keratinocytes (SCC9 and gingival keratinocytes) and subjected to the cell detachment assay by polymorphonuclear leukocytes and/or bacterial ultrasonic extracts from Actinobacillus actinomycetemcomitans Y4, Bacteroides forsythus OMZ 408, Fusobacterium nucleatum ATCC 10953, Capnocytophaga sputigena 4 and Eikenella corrodens 1073. The bacterial extracts alone caused no cell disruption of the keratinocyte monolayers. Polymorphonuclear leukocyte alone caused only a minimal cell detachment. On the contrary, when the bacterial extracts were added to the co-culture of keratinocytes and polymorphonuclear leukocytes, cell detachment of keratinocytes was observed except for the bacterial extract from Eikenella corrodens 1073. The effect of Actinobacillus actinomycetemcomitans Y4 was the strongest. This effect was heat labile and not inhibited by polymyxin B. Cell detachment was inhibited by cd-antitrypsin but not by catalase and superoxide dismutase. No keratinocyte lysis was observed in terms of 51Cr release. Hydrogen peroxide and leukocyte elastase also caused keratinocyte detachment. These results indicate that polymorphonuclear leukocyte can cause non-lytic cell detachment of the gingival keratinocytes when encountering some bacteria, which may lead to the increase of the permeability of the keratinocyte layers.抄録全体を表示PDF形式でダウンロード (2280K) -
印象圧と関連した粘膜評価法の検討小田切 一浩1992 年 59 巻 1 号 p. 88-104
発行日: 1992年
公開日: 2010/10/27
ジャーナル フリーThe viscoelastic character of the denture foundation is different in each individual or site. The character of the mucosa and the appropriate impression procedure should be examined. However, few investigations concerning the relation between the compressibility of the denture foundation and the impression pressure have been reported.
The purpose of this study was to discuss the objective evaluation of the denture foundation in relation to the impression pressure.
In this report, the local compressibility of the denture foundation of 20 upper edentulous patients was measured with the 20 MHz B-Mode ultrasonic diagnostic equipment. The Compressible Index was defined to analyze the compressibility of the denture foundation quantitatively as against the impression pressure.
The main results were as follows:
1. The compressible amount of the denture foundation against 100gw/cm2 pressurization was an average of 0.32. `0.61mm.
2. The compressible rate of the denture foundation against 100gw/cm2 pressurization was an average of 13.5. `20.7%.
3. The Compressible Index was confirmed to represent the compressibility of the denture foundation accurately as against the impression pressure.
4. It was suggested that the Compressible Index was useful for the clinical simple evaluation of the denture foundation.抄録全体を表示PDF形式でダウンロード (8109K) -
小林 淳二1992 年 59 巻 1 号 p. 105-123
発行日: 1992年
公開日: 2010/10/27
ジャーナル フリーrecognized as small in quantity but as significant components for many connective tissues. The temporomandibular joint (TMJ) disc and synovial fluid were rarely investigated in this regard. This research was aimed at the biochemical analysis of the composition of collagen, GAGs and PGs in the normal human and porcine TMJ discs, and of PGs in the synovial fluid.
1. The collagen type analysis by gel electrophoresis revealed that the human and porcine TMJ discs were composed only of type I collagen.
2. The human TMJ disc contained 69. 9% chondroitin sulfate, 24. dermatan sulfate, 5. 6% hyaluronic acid and a trace amount of keratan sulfate, and the porcine TMJ disc, 5. 8%, 91. 4%, 2. 8% and a trace amount, respectively. Immunohistochemical staining of the functional parts of the TMJ disc showed a universal distribution of these GAGs.
3. PGs were extracted from the TMJ disc with 4M guanidine chloride and separated by ion-exchange and gel-filtration chromatography. A high molecular weight PG resembling the cartilage PG and two low molecular weight PGs having a core protein of Mr 40K were isolated.
4. PGs suggested to be derived from the matrix of other tissues were found in the abnormal human synovial fluid.
From these results it was suggested that the TMJ disc was thought not to be fibrocartilage but a fibrous tissue adapted against to the compressive and tensile force.抄録全体を表示PDF形式でダウンロード (12662K) -
回復時の粘膜の挙動について平野 滋三1992 年 59 巻 1 号 p. 124-141
発行日: 1992年
公開日: 2010/10/27
ジャーナル フリーThe purpose of this study was to analyze the creep phenomena of the palatal mucosa under pressure and after pressure release. The measuring device consistedof the control box, which regulated the loading force by air pressure, and the pick-up, which was fixed to the teeth and applied the load onto the mucosa, detected the displacement of the mucosa.
The creep was analyzed by the Voigt 4 element model. The ratio of the recovery (S1'/S1, S2'/S2) and the recovery percentage were analyzed on the creep after the pressure release and evaluated from the point of expressing exactly the viscoelastic recovery.
The results were as follows:
1. Both the amount of the displacement under pressure and the recovery of the palatal mucosa showed the least value at the center site and at the other sites less at the distal site than the mesial site.
2. The ratio of Sl'/S1 was about 0. 5 at all sites. On the other hand, the ratio of S2'/S2 showed values higher than 1 except at the center site and was significantly different among the other sites.
3. It was pointed out that the recovery percentage was more suitable than the ratio of the recovery to explain the viscoelastic recovery of the palatal mucosa.抄録全体を表示PDF形式でダウンロード (8896K) -
姜 〓1992 年 59 巻 1 号 p. 142-159
発行日: 1992年
公開日: 2010/10/27
ジャーナル フリーThe purpose of this study was to investigate the influence of the difference of the biting pivot positions, vertical dimensions and mandibular positions on the condylar displacement during clenching. The condylar displacement was measured by the Pantogragh using the point of condyle on the Kinematic Axis as the representive and the Path of the Kinematic Axis (PKA) as the standard for the judgement of the displacement. The bending deformation of the mandible was also measured by a multi-vision and image analyzing system in order to correct its influence on the condylar displacement measured. The results were as follows:
1. The direction and magnitude of the condylar displacement changed with the biting pivot position. The bilateral condyles moved upwards deviating from the PKA when clenching on the bilateral 2nd-molar or the bi-or unilateral canine teeth ; Whereas the biting-side condyle moved downwards and the idling condyle either moved upwards deviating from the PKA or backwards along the PKA when clenching on the unilateral 2nd-molar.
2. The displacement of the idling condyle was multi-directional when clenching on the habitual closure whereas it was unidirectional and of a smaller magnitude when clenching on the most retruded closure.
3. When clenching on the unilateral 2nd-molar, the mandible on the non-pivot side had an inward and upward bending deformation and the arch width decreased. It can be inferred that the actual idling condylar displacement was more inward and upward than that measured by the Pantogragh.抄録全体を表示PDF形式でダウンロード (6697K) -
秋重 智司1992 年 59 巻 1 号 p. 160-180
発行日: 1992年
公開日: 2010/10/27
ジャーナル フリーThe short-term effects of the difference of occlusal splint contacts on the jaw function were investigated on five healthy subjects.
The maxillary stabilization splint (S-type) was fabricated and sectioned into three parts: an anterior section (A-type) and two posterior sections (P-type) . These 3 types of splints were used for 10 days for each subject.
The EMG activity of the masseter and the anterior and the posterior temporal muscles were measured during the maximum clenching in the intercuspal position and on the wearing splint. Subsequently on the bite force-measuring device with two transducers the bite and the EMG activity were measured during the maximum clenching, and the intercuspal occlusal contacts were recorded.
The results were as follows:
1. After wearing the P-type, the total EMG activity during clenching in the intercuspal position was decreased, then increased after removal.
2. After wearing the S-type and the A-type the anteroposterior distribution of the bite force during clenching was changed, then returned after removal.
3. After wearing the A-type, the occlusal contact area of the anterior teeth in the intercuspal position was decreased, then increased afterremoval, while after wearing the S-type and the P-type that of the posterior teeth was decreased, then increased after removal.抄録全体を表示PDF形式でダウンロード (8442K) -
指出 豊1992 年 59 巻 1 号 p. 181-195
発行日: 1992年
公開日: 2010/10/27
ジャーナル フリーImmunohistochemical study on the hemidesmosomes of the normal and malignant squamous epithelia of the human oral mucosa was performed using a monoclonal antibody (MoAb) 3A1 which recognized specifically the hemidesmosomes. Biochemical characterization of the antigen recognized by this antibody was also investigated.
The results and conclusion of this study were as follows:
1) MoAb 3A1 reacted specifically with the hemidesmosomal plaques located on the basement membrane zone of the basal cells of the normal squamous epithelium.
2) In the cases of malignant epithelium, MoAb 3A1 reacted irregularly with the cell membrane at the border of the cell and stroma. The expression of the antigen in the carcinoma cells was found on the hemidesmosomes with abnormal structure.
3) The antigen recognized by MoAb 3A1 extracted from the cultured carcinoma cells was purified by protein A Sepharose affinity chromatography and DEAE ion-exchange HPLC. The purified antigen was a protein associated with hyaluronate having a moleculer weight of more than 200 Kd. The moleculer weight of the protein itself was found to be 180 Kd. Analysis of the amino acid composition showed this antigen was mainly composed of glycine, serine, alanine, glutamic acid and leucine.抄録全体を表示PDF形式でダウンロード (7172K) -
口唇口蓋裂患者の治療に関連して岩田 耕治1992 年 59 巻 1 号 p. 196-204
発行日: 1992年
公開日: 2010/10/27
ジャーナル フリーWe frequently experienced a relapse tendency after the upper dental arch expansion in a patient with cleft lip and palate. The purpose of this study was to detect the tooth displacement right after removing the orthodontic appliance. Time-lapse monitoring of the displacement was performed on the maxillary canine in the minor segment using a non-contact eddy-current type sensor. Clinical application was tested in 9 patients with clefts, and the following results were obtained:
1) The relationship between the displacement and the output voltage of the sensor showed a good linearity with a 3% standard error.
2) In 3 subjects with oronasal fistula after orthodontic treatment and in a subject with discontinuity of the maxillary dental arch, displacements toward the palatal side were recorded.
3) In 2 subjects with arch continuity in the maxilla, no significant displacement was observed. 4) The viscoelastic property of the surrounding tissue of the tested tooth could have induced the displacement monitored by this method.抄録全体を表示PDF形式でダウンロード (7375K) -
奥山 禎男1992 年 59 巻 1 号 p. 205-245
発行日: 1992年
公開日: 2010/10/27
ジャーナル フリーIn a series of studies to investigate the structural features and the characteristics of the tooth, a detailed observation was made on the enamel surface and the enamel composing the fissure and pit of the freshly extracted human permanent molars, using scanning electron microscopy and transmission electron microscopy. The materials employed in this observation were taken from the noncarious surface of molars.
The following results were obtained: The hypocalcified zone was observed more or less in the enamel composing the fissure and pit. In many cases, the dental cuticle can be seen on the enamel surface. A rodless enamel was present, in greater or lesser degree, in the enamel surface layer. Retzius's line was observed clearly in the enamel composing the fissure and pit. In many cases, perikymata was found on the enamel surface. In some cases, tubular pits invaginated secondarily from the fissure and pit were observed. In some, a dental calculus can be observed in the fissure and pit. By the observation of the inner structure of the dental calculus, mineralization occurred around and within the bacteria and in the interbacterial matrix composing the dental caluculus. Bacteria of the same degree of calcification appear in the microcolonies.抄録全体を表示PDF形式でダウンロード (44262K) -
長澤 敏行1992 年 59 巻 1 号 p. 246-258
発行日: 1992年
公開日: 2010/10/27
ジャーナル フリーThe purpose of this study was the investigation of the T cell subsets in the gut-associated lymphoid tissues. CD4+8+ T cells were found to appear temporarily in Peyer's patches of mice at 2 to 3 weeks after birth. They disappeared within a short period of time from Peyer's patches, but constantly populated in the intestinal intraepithelial lymphocytes (iIEL) . Three to 10% of iIEL were CD4+8+ in the specific pathogen-free (SPF) condition throughout life. They are mature T cells with a high density of CD3 and TcRαβ and found to respond to immobilized anti-CD3 antibody. The appearance of CD4+8+ T cells in iIEL was found to be dependent on the thymic selection, since they were absent in the athymic nu/nu mice, and the Vβ gene usage was dictated by the pattern of thymic selection. CD4+8+ T cells were not found in the germ-free mice but increased in the SPF old mice. These results indicate that the iIEL contain a unique subset of thymus-derived mature CD4+8+ T cells. These cells may repopulate after the thymic selection in the intestine and increase in response to the intestinal microenvironments.抄録全体を表示PDF形式でダウンロード (2013K) -
フラットレーザービームを用いて相馬 邦道, 久野 昌隆, 黒木 健広, 石田 哲也, 黒田 敬之1992 年 59 巻 1 号 p. 259-264
発行日: 1992年
公開日: 2010/10/27
ジャーナル フリーA new system has been developed for measuring the surface morphology of the occlusal material. The main characteristic of the system is utilizing a flat laser beam to produce high accuracy measuring and to enable measuring 200 points at the same time on a line of 30 mm in length. It takes 8 to 10 minutes to digitize the whole morphology of a dental cast. The system has a central processing unit that assembles a series of digitized points into a data file of the dental morphology. It is also able to recognize the graphical image of the numerically reconstructed morphology on the CRT.
Application of this measuring system enables the approach to the qualitative and quantitative evaluation of the spatial relationship between the opposing teeth at near the occlusal contact.抄録全体を表示PDF形式でダウンロード (2438K) -
深山 治久1992 年 59 巻 1 号 p. 265
発行日: 1992年
公開日: 2010/10/27
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森山 啓司, 黒田 敬之1992 年 59 巻 1 号 p. 266
発行日: 1992年
公開日: 2010/10/27
ジャーナル フリーPDF形式でダウンロード (226K) -
向山 仁1992 年 59 巻 1 号 p. 267
発行日: 1992年
公開日: 2010/10/27
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春日井 昇平, 小椋 秀亮1992 年 59 巻 1 号 p. 268
発行日: 1992年
公開日: 2010/10/27
ジャーナル フリーPDF形式でダウンロード (263K) -
蔡 正煕, 宮入 裕夫1992 年 59 巻 1 号 p. 269
発行日: 1992年
公開日: 2010/10/27
ジャーナル フリーPDF形式でダウンロード (205K)
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