巻号一覧
36 巻 (1992)
- 6 号 p. 1179-
- 5 号 p. 959-
- 4 号 p. 705-
- 3 号 p. 461-
- 2 号 p. 231-
- 1 号 p. 1-
前身誌
36 巻, 5 号
選択された号の論文の22件中1～22を表示しています
- |<
- <
- 1
- >
- >|
-
表面硬度および三点曲げ強さについて田辺 直紀, 佐藤 吉則, 高橋 博, 土生 博義, 阿崎 正之, 松津 里香, 永井 学, 大木 一三1992 年 36 巻 5 号 p. 959-967
発行日: 1992/10/01
公開日: 2010/08/10
ジャーナル フリーIn this study we compared the results of the superficial Rockwell hardness test and the transverse strength test of 6 denture base resins by curing all these specimens with microwave.
The following results were obtained from these tests:
1. Concerning heat curing resin, hardness of the most outer surface did not change between microwave curing and heat curing. However hardness of polished surface decreased. As to flexure strength there was no significant difference between the result of microwave curing and heat curing, but modulus of elasticity decreased.
2. Concerning self-curing resin, the type in which the size of powder polymers is reduced to increase its flow revealed the decrease of surface hardness by microwave curing comparing with the result of curing designated by the manufacturer. The flexure test showed no significant difference or some increase of flexure strength and modulus of elasticity by microwave curing comparing with curing designated by the manufacturer.
3. When each type of resin is cured by microwaves, hardness of polished surface decreases. However strength is assumed to increase by increased generation of internal heat due to increase of monomers during irradiation of microwaves.抄録全体を表示PDF形式でダウンロード (4709K) -
特に脳波について関 雅寛1992 年 36 巻 5 号 p. 968-979
発行日: 1992/10/01
公開日: 2010/08/10
ジャーナル フリーTo investigate the influence of occlusal interference on the central nervous system, power spectral analysis of electroencephalographic patterns was carried out under various occlusal conditions in 10 subjects with individual normal occlusion to whom vertical occlusal interference was experimentally applied to the lower first molars. From the cycle frequencies and power levels, the following results were obtained by analysis of variance.
1. Significant differences were demonstrated between the EEG cycle frequency during normal occlusion and that during interference of 50μm, and between the EEG cycle frequency during normal occlusion and that during interference of 100μm. However, when EEGs during interference of 50 and 100μm were compared, no significant difference was found in cycle frequencies.
2. When EEGs during occlusal interference on the left and right sides were compared, significant differences were found in EEG cycle frequencies and power levels between them.
3. At the occipital region, the EEG pattern showed no significant differences in cycle frequencies and power levels between the left and right under all experimental conditions.
4. Transition from α-wave dominance which appeared with mandible at a resting position, to β-wave dominance was most distinctly demonstrated by clenching.抄録全体を表示PDF形式でダウンロード (4627K) -
二川 浩樹, 貞森 紳丞, 浜田 泰三1992 年 36 巻 5 号 p. 980-987
発行日: 1992/10/01
公開日: 2010/08/10
ジャーナル フリーRelative contribution and possible roles of specific and non-spesific interactions involved in the adherence of Candida albicans and C. tropicalis was analysed by three-way analysis of variance using eight types of surface-modified glass.
It was revealed that specific and electrostatic factors contributed to the adherence of C. albicans to greater extent (43.6 and 38.9% respectively) than hydrophobic factor (4.9%). Whilist in the adherence of C. tropicalis, the contribution of hydrophobic interaction was much greater (76.7%) than that of specific interaction (3.7%) or electrostatic interaction (2.8%). These results suggest that the adherence of C. albicans is mediated mainly by supecific and electrostatic interactions, and C. tropicalis adhered to solid surfaces mainly by hydrophobic interaction.
Factors involved in the initial adherence of these yeasts were examined under an increased flow rate condition where rapid or strong bind is thought to be necessary to adhere, and it was revealed that, in both cases, specific or electrostatic factor may play more important role than hydrophobic interaction.抄録全体を表示PDF形式でダウンロード (1216K) -
象牙質表面処理剤による細菌通過性の影響黒川 裕臣, 向 宣男, 畑 好昭1992 年 36 巻 5 号 p. 988-989
発行日: 1992/10/01
公開日: 2010/08/10
ジャーナル フリーFour types of bacteria have potential to penetrate through dentinal tubules.
This penetrability is influenced by the following factors: metabolic produce of the bacteria, the existance of smeared layer, gravity, hydraulic pressure, and difference of the concentrations of bacterial culture medium.
In this study, the effect of various dentin surface treatments (non-treated, phosphoric acid etched and poly acrylic acid etched) and the tickness of cavity floor dentin thickness (1 and 2mm) on the penetrability of bacteria was evaluated.
The results indicated that 1mm thickness of cavity floor treated with phosphoric acid has penetrated the bacteria in minimum amount of time.抄録全体を表示PDF形式でダウンロード (6379K) -
第1報: インプラントとリーゲル装置の上顎骨欠損顎補綴への応用新美 敦, 西口 浩明, 江幡 晃治, 糟谷 政代, 上田 実, 金田 敏郎1992 年 36 巻 5 号 p. 999-1003
発行日: 1992/10/01
公開日: 2010/08/10
ジャーナル フリーMaxillary defect due to maxillary malignant tumor produces masticatory and speech disorders. For rehabilitation of these disorders we fabricated new maxillary obturator prosthesis used osseointegrated implants and Riegel apparatus.
The evaluation of mastication and speech was done. Results obtained were as follows:
1) The masticatory function was 55, 80 and 90% in the case of no prosthesis, former prosthesis and new prosthesis respectively.
2) The clarity of pronunciation was 63.5, 91.8 and 95.8% in the case of no prosthesis, former prosthesis and new prosthesis respectively.
These results indicates the usefulness of the new maxillary obturator prosthesis for maxillofacial rehabilitation.抄録全体を表示PDF形式でダウンロード (5509K) -
第1報板状試料の衝撃緩衝能小林 文隆1992 年 36 巻 5 号 p. 1004-1015
発行日: 1992/10/01
公開日: 2010/08/10
ジャーナル フリーShock absorbability of six materials used for the shock absorbtion of dental implants were measured and compared after repeated loads, immersion in water and thermal cycling.
The following results were obtained:
1. Kurepeet dough® and Molloplast B® each with a high elastic coefficient showed excellent shock absorbability in the simple plate specimen.
2. Delrin® Unifast® and Jacketsheet® each with a low elastic coefficient showed excellent shock absorbability in the specimens reinforced by metals.
3. Softresin® showed high shock absorbability in both the simple and reinforced specimens.
4. Only Soft resin of all materials was significantly influenced after immersion in water for seven days.
5. A remarkable reduction of the shock absorbability occured in all materials except Delrin after immersion in water for ninety days.
6. The shock absorbability of Unifast decreased remarkably after repeated loads, while the absorbability others of the very little.
7. The shock absorbability of the resin materials, such as Unifast, Jacket sheet and Softresin decreased significantly after thermal cycling.抄録全体を表示PDF形式でダウンロード (4897K) -
低膨張硬石膏コア法と特殊石膏法との比較喜多 誠一, 野首 孝祠, 安井 栄, 長島 正, 奥野 善彦, 多賀 義晃1992 年 36 巻 5 号 p. 1016-1025
発行日: 1992/10/01
公開日: 2010/08/10
ジャーナル フリーThe authors have developed a new denture processing method with a pour type resin to tightly hold the artificial teeth using a rigid core made by a two-stage investing procedure with stone and plaster (low-expansion coefficient plaster core system).
In this study, for the purpose of evaluation dimensional accuracy of denture bases produced with pour type resins, pour type resin denture bases were processed by using low-expansion coefficient plaster core system and modified gypsum investment system, and vertical and horizontal dimensional changes of artificial teeth were measured.
The vertical and horizontal dimensional changes of artificial teeth were the smallest values when low-expansion coefficient plaster core system was used. This result shows that the teeth in the stone-plaster core were more tightly gripped as compared to the conventional molds in pour type resin processing systems, such as a hydrocolloid mold, a silicone rubber mold and a gypsum mold.
Consequently, some problems of the conventional pour type curing technique were improved by using the stone-plaster core made by a two-stage investing procedure. It was suggested that this modified curing technique using a pour type acrylic resin was very useful in the construction of dentures.抄録全体を表示PDF形式でダウンロード (4809K) -
倉知 正和, 石神 元, 横山 佳郎, 山田 早苗1992 年 36 巻 5 号 p. 1026-1031
発行日: 1992/10/01
公開日: 2010/08/10
ジャーナル フリーThe present study was made to examine LI presented as the index of the degree of lateralized mastication.
On 104 subjects aged 23-30, the masticatory side was judged by gum chewing cycle, and the frequency ratio of lateralized mastication as determined from “(right masticatory number-left masticatory number)/(right masticatory number+left masticatory number)×100” was expressed in lateralized mastication index (LI) divided into 5 grades of every 20% for both positive and negative.
The examination of the habitual masticatory side as judged from the questionnaire and first chewing cycle in confrontation with this LI revealed a good coincidence of both these and the usefulness of expressing the frequency ratio of lateralized mastication in LI.抄録全体を表示PDF形式でダウンロード (922K) -
多和田 泰之, 畑 好昭1992 年 36 巻 5 号 p. 1032-1045
発行日: 1992/10/01
公開日: 2010/08/10
ジャーナル フリーIn this study, infrared thermography was applied to investigate the heat behavior within bovine bone structure. This is to predict heat distribution when bone is actually drilled by a rotary cutting instrument for dental implant.
A simulated model from bovine bone was designed to measure the physical property and emissivity of heat. The relationship between the temperature of heat source and model surface was compared and the following results were obtained:
1. The emissivity (ε) of bovine bone was 0.987
2. The thermal conductivity was 0.498 (W/mK) and thermal diffusivity was 2.331×10-7 (m2/s).
3. The initial increase of model surface temperature was proportional to temperature of heat source.抄録全体を表示PDF形式でダウンロード (4720K) -
西川 悟郎, 皆木 省吾, 佐藤 隆志1992 年 36 巻 5 号 p. 1046-1056
発行日: 1992/10/01
公開日: 2010/08/10
ジャーナル フリーDifference in the area of preliminary impression surface resulted from two different techniques for edentulous arches were examined. Thirty-five edentulous patients (70 sides of mandibular arch) were used for subjects. Projected areas on the tentative plane of occlusion and superficial areas of mandibular impression surface were measured. The areas and the ratio of areas (modeling compound/alginate) were examined in each of the anatomical zones. Subjects were divided into three groups according to the degree of alveolar bone resorption of mandible (severe, moderate and slight resorption groups).
In each anatomical zone, projected and superficial areas of modeling compound impression were larger than those of alginate impression. The ratio was the highest in the distolingual zone among mandibular anatomical zones regardless of the extent of alvealar bone resorption. The severe resorption group indicated the highest ratio in each anatomical zone.
From these results, it was revealed that the areas of modeling compound impression are larger than those of alginate impression in any anatomical zone and the ratio is the highest in the distolingual zone. The ratio also showed a tendency to increase depending on the advancement of bone resorption in each anatomical zone.抄録全体を表示PDF形式でダウンロード (1845K) -
藤原 周, 中島 民恵, 羽田 詩子, 竹内 幹生, 三村 真一, 松井 浩, 羽柴 元裕, 南 温, 丸井 義仁, 藤井 輝久1992 年 36 巻 5 号 p. 1057-1061
発行日: 1992/10/01
公開日: 2010/08/10
ジャーナル フリーIt is well known that Candida albicans is typical dimorphic fungi. Both mycelial form and yeast form of Candida albicans are existed on denture plaque. The purpose of this study was to investigate the different froms and dietary sugars which could influence the adhesion of Candida albicans to acrylic resin surfaces. Mixed group which contained mycelial form and yeast form of Candida albicans adhered to acrylic resing greater than yeast form group in high consentration of cell. While, in low concentration of cell, yeast form group adhered to acrylic resin greater than mixed group. A scanning electron microscopic study showed both mycelial and yeast form of Candida albicans firm adhered to acrylic resin.抄録全体を表示PDF形式でダウンロード (2587K) -
Normal face群におけるクレンチング方向の変化が咬合力値とその方向, 筋放電活動に及ぼす影響について飯沼 利光, 竹内 康司, 森谷 良彦, 伊藤 智加, 大森 洋一, 木村 匡孝, 椎原 克寛, 杉江 弘, 竹内 英明, 山本 正浩, 若 ...1992 年 36 巻 5 号 p. 1062-1071
発行日: 1992/10/01
公開日: 2010/08/10
ジャーナル フリーIn this study, dentulous subjects in the normal face group were selected had been engaged in vertical and anterior clenching to measure the magnitude and direction of bite force as well as the EMG activity of masticatory muscles. The influence of changing direction between vertical and anterior clenching on the functions of stomatognathic system were analyzed.
The results were as follows:
1. The magnitude of bite force in anterior clenching was smaller than that of in vertical clenching at 25-100%MC.
2. According to the increase of bite force, the direction of bite force (θ) in vertical and anterior clenching was increasing.
The dircetion of bite force (θ) in anterior clenching was smaller than that in vertical clenching 25-100%MC.
3. The EMG activity per 1kgf of temporalis in anterior clenching was smaller than that in vertical clenching at 50-100%MC.
The EMG activity per 1kgf of lateral and medial pterygoid muscle in anterior clenching was larger than that in vertical clenching at 25-100%MC.抄録全体を表示PDF形式でダウンロード (1578K) -
鈴木 恭典1992 年 36 巻 5 号 p. 1072-1086
発行日: 1992/10/01
公開日: 2010/08/10
ジャーナル フリーStructural designs for metal plate dentures consisting of a double structure were created in order to prevent deformation and breakage of the dentures and to protect the abutment teeth and the alveolar ridge. In this study, the relationship between the denture stiffness and the pressure distribution both on a single abutment tooth and on the alveolar ridge was investigated.
Result:
1. Loading in the second premolar region, the pressure on the alveolar ridge was less when using a double structure than when using a skeleton type, and the pressure on the abutment tooth in the vertical direction was greater when supported by a double structure than when supported by a skeleton type.
2. When the loading point was moved distally, the pressure on the abutment tooth in the vertical direction was decreased in all types of dentures.
3. When the displaceability of the alveolar mucosa decreased, the pressure on the alveolar ridge increased, while the pressure on the abutment tooth decreased.
4. The double structure showed little strain at all the loading points.
5. The highest displacement occured in all types of dentures when the loading was in the second molar region.
6. The tractive force on the abutment tooth was approximately equal in all types of dentures.抄録全体を表示PDF形式でダウンロード (4256K) -
荷重条件の相違が応力分布に与える影響中村 隆志, 松本 辰男, 今西 仰, 日野 年澄, 丸山 剛郎1992 年 36 巻 5 号 p. 1087-1091
発行日: 1992/10/01
公開日: 2010/08/10
ジャーナル フリーThe purpose of this study was to analyse the stress distributions in new ceremic premolar crowns. Three dimensional finite element analysis of new ceramic premolar crowns were carried out to evaluate the effect of different loading conditions: maximum biting force (500N), and chewing force (200N, 0, 45 and 90 degrees to the tooth axis). Two kinds of new ceramics (Dicor and Hi-Ceram) were used for the study. The stress analysis was done by using 3-D finite element analysis program (COSMOS/M).
The results were summarized as follows;
1) When five points load (500N) were applied vertically on the occlusal surface, the tensile stress appeared to concentrate around loading points.
2) When two points of load (200N) were applied vertically (0 degree to the tooth axis) on the buccal cusp, tensile stress concentrated around loading points. In case of using horizontal load (90 degrees to the tooth axis), however, tensile stress concentrated at the inner cervical area of buccal side of crown.
3) If higher Young's Modulus value core material was used inside, the tensile stress intended to appear in the core material especially when horizontal load was applied.抄録全体を表示PDF形式でダウンロード (3425K) -
深瀬 敦, 藤田 忠寛, 青木 英夫, 玉置 勝司, 山村 雅章, 山田 重雄, 渡辺 英男, 盛重 正仁, 兼松 恭規, 遠藤 ゆかり1992 年 36 巻 5 号 p. 1092-1101
発行日: 1992/10/01
公開日: 2010/08/10
ジャーナル フリーRecently, various approaches have been conducted to apply CAD/CAM into the field of prosthodontics. Successive studies on a computer-aided approach to construction of coronal restoration were performed at our Dept. since 1984.
The purpose of this study is to explain our method of measuring the prepared tooth placing the master pattern and modifying it according to an individual morphology of each tooth by CAD.
The procedures can be successfully performed in the following ways by means of 3-D Measurement-Milling Apparatus (Type A-1) developed by our Dept.
1. The application of the polar coordinates measurement of the master pattern makes it possible to display the occlusal surface and contact relationships between maxillary and mandibular teeth.
2. The cervical margin is measured in a rate of 50μm with each interval of 1mm in vertical direction utilizing the cyrindrical coordinate that determines azimuth with 0.5 degrees.
3. Finally, the occlusal surface of the master pattern and marginal line are connected by Hermite Curve, then the design of external contour is completed by CAD.抄録全体を表示PDF形式でダウンロード (9605K) -
第1報静的荷重下における単独インプラント周囲の歪み佐藤 正喜, 窪木 拓男, 板阪 宗生, 近藤 康弘, 山下 敦1992 年 36 巻 5 号 p. 1102-1110
発行日: 1992/10/01
公開日: 2010/08/10
ジャーナル フリーRecently, osseointegrated dental implants have come to be used more and more in the treatment of edentulism. Osseointegration has been found to achieve better results than fibro osseous integration however, it has been suggested that excessive and/or concentrated stresses may cause resorption of the surrounding bone.
To address this problem, the IMZ implant system incorporates stress-absorbing elements, such as the intramobile element (IME). There are varying reports regarding the characteristics of the IME, however, and its effectiveness is still controversial.
This study compares the stress-transfer characteristics around a single freestanding IMZ implant with three types of internal elements: an IME made of polyoxymethylene, an intramobile connector (IMC) consisting of a polyoxymethylene head and titanium screw, and a metal element (Metal-E) made of stainless steel. An IMZ implant (4×13mm) and five strain gauges (Kyowa Inc.) around the implant were embedded in an acrylic resin block (3×3×3cm). The vertical (10 and 15kgf) and horizontal (3 and 5kgf) static forces applied to the surface of the superstructure and the strain values around the implant were measured.
The results are as follows:
1. Under vertical forces, among the three types of elements no significant difference in the stresses around a single freestanding implant was found.
2. Under horizontal forces, a more uniform stress around a single freestanding implant with the Metal-E was observed. When using the IME, there was a greater stress concentration on the upper-oppressive side of the implant. The action of the IMC appeared to be midway between the IME and the Metal-E.
3. The IME fractured after several applications of 5-kgf horizontal force.抄録全体を表示PDF形式でダウンロード (1262K) -
町野 敦1992 年 36 巻 5 号 p. 1111-1124
発行日: 1992/10/01
公開日: 2010/08/10
ジャーナル フリーTo elucidate the relationship between masticatory ability and masticatory movements, mandibular movements and EMG were recorded at the same time that masticatory efficiency was measured by a sieve-analysis. Three different sets of chewing strokes and natural chewing were measured with peanuts. Eleven subjects with natural dentitions were chosen and tests were performed once a day and repeated for a total of five days.
1. As the setting strokes became fewer, the duration of movements became longer than natural chewing. The duration of movements on the first and second day tended to be longer than that on subsequent days. However the duration of movements was stable from the third day of measurement.
2. As the duration of the opening phase and EMG silence became longer and the extent of lateral displacement of the opening phase became smaller, the masticatory efficiency increased. This suggested that masticatory efficiency was affected more by masticatory movements during opening than closing.
3. It is suggested that, when the masticatory efficiency is measured by the sieve-analysis, at least two days for preliminary exercises are needed, and then the chewing strokes should be set at 20 and a sieve either of 10 or 16 mesh should be used.抄録全体を表示PDF形式でダウンロード (4179K) -
咬合平面の傾斜と歯列弯曲について櫻井 直樹, 野村 修一, 水野 亨, 岩片 信吾, 佐藤 斉, 石岡 靖1992 年 36 巻 5 号 p. 1125-1132
発行日: 1992/10/01
公開日: 2010/08/10
ジャーナル フリーThe purpose of this study is to investigate the relation between disorder of dental arch form and internal derangement of TMJ. Twenty patients with internal derangement of TMJ and twenty normal subjects were selected for this investigation.
We measured the inclination of occlusal plane to Camper's plane and the degree of the occlusal curvature (sagittal and frontal) in two groups, using study casts mounted on an articulator. The results were as follows: 1) There was no significant difference in the inclination of occlusal plane between two groups, but the inclinations of patients tended to range more than those of normal subjects. 2) There was a significant difference in the degree of sagittal occlusal curvature between two groups. 3) There was no significant difference in the degree of frontal occlusal curvature except the mesial cusp of first molar between two groups. 4) In unilateral patients, comparing the degree of occlusal curvature at affected side with that of healthy side, there was no significant difference in the degree of sagittal occlusal curvature between two sides, but the degree of frontal occlusal curvature on second molar of healthy side was larger than that of affected side.抄録全体を表示PDF形式でダウンロード (1201K) -
材料の混和比, 荷重量および粘膜の厚径の違いが調整用材料の残留厚径に及ぼす影響溝上 隆男, 名波 智章, 尾松 素樹, 大井 誠一, 小林 慶太, 武井 利夫1992 年 36 巻 5 号 p. 1133-1140
発行日: 1992/10/01
公開日: 2010/08/10
ジャーナル フリーIn the method to examine fitness between denture base and basal mucosa, rubber-type materials for denture base adjustment are set between the basal seat and the basal mucosa and pressure welding is done. The remaining thickness differences of the pressed materials reveal unfitness areas. To apply this method, we must consider control and usage of rubber-type materials for denture base adjustment. To establish standards for materials usage, we investigate the influence the following differences had on the thickness of pressed rubber-type materials: catalyst content of rubber-type materials, load and mucosal condition.
Results:
1. As the catalyst increased, so did the remaining thickness of the pressd materials.
2. As load increased, the remaining thickness of pressed materials decreased.
3. As simulated mucosa thickness increased, so did the remaining thickness of the pressed materials.
4. We also investigated locational differences. Compared with simulated mucosa 1, 2mm thick, the thick area of the 4, 8mm thick simulated mucosa tended to remain in the center, rather than on the circumference.
5. When the simulated mucosa was the same thickness with the alveolar ridge form, there is no locational difference on the remaining thickness under the 1mm thick simulated mucosa, and under the 2mm thick simulated mucosa the thick area tended to remain in the crest of alveolar ridge.
When the simulated mucosa was the different thickness, the thick area of the remaining materials tended to remain in the thick part of the simulated mucosa.抄録全体を表示PDF形式でダウンロード (4211K) -
尾松 素樹, 溝上 隆男1992 年 36 巻 5 号 p. 1141-1147
発行日: 1992/10/01
公開日: 2010/08/10
ジャーナル フリーTo the registration of the centric maxillomandibular relation in edentulous patient, we can employ a technique to utilize the tapping area. This area is collection of tapping points recorded on the tracing plate of an intraoral gothic arch tracer by having patients undergo habitual small opening and closing of the mandibular. When we use this method, it is necessary to record the tapping area of adequate mandibular position. In this study, we investigated tapping force by applying this technique.
Ten dentulous subjects were allowed to make tapping movements of varying force in order to examine the appearance of the right-left position of the tapping area. We also compared the right -left and antero-posterior position of tapping areas.
Results follow.
1. As tapping force increased, eight of ten cases had changes in the right-left position of the tapping area from around the intercuspal position. Consequently, effective tapping force for tapping area recording was revealed to be light (less than 0.6kg).
2. As tapping force increased, we recognized changes in the tapping areas of both the right-left and antero-posterior positions. Of the ten cases studied, nine showed more significant changes in the antero-posterior position than the right-left position of the tapping area.抄録全体を表示PDF形式でダウンロード (2896K) -
竹内 幹生1992 年 36 巻 5 号 p. 1148-1161
発行日: 1992/10/01
公開日: 2010/08/10
ジャーナル フリーThe aim of this study is to investigate the properties of bone substrates which are responsible for induction of bone-resorptive behavior of osteoclasts. For this purpose, the recently developed culture system in which the bone-resorptive activity of isolated osteoclasts can be analized on various natural or artificial substrates has been utilized.
The results are follows:
1. Resorption pits by isolated osteoclasts occured on bovine enamel, bovine dentin, egg shell, clam shell and lingula shell, containing hydroxyapatite, calcite and aragonite respectively.
2. The resorptive activity of isolated osteoclasts was significantry lower on demineralized bone slices than that on untreated bone.
3. Extracellular calcium from 2mM to 3mM stimulated resorptive activity although 6mM or the above inhibited the activity in 15h of culture.
4. Although no resorption was seen on the surfaces of polycrystalline synthetic hydroxyapatite, geological single crystal hydroxyapatite and α-tricalcium phosphate, many pits were observed on octacalcium phosphate.
5. Resorption pits were created on the bone slices made anorganic by hydrazine treatment or sintering at 700°C and 900°C.
6. Electron microscopy revealed that elaborated ruffled border and clear zone developed in the osteoclasts on the mineralized bone, on the other hand, irregularly arranged ruffled border and poorly-organized appeared in the osteoclasts on the demineralzed bone.
These observations have suggested that bone mineral is responsible for induction of bone resorption by osteoclasts in close relation to development of ruffled border in osteoclasts.抄録全体を表示PDF形式でダウンロード (14876K) -
最大活動量との比較鳥巣 哲朗, 橋本 信行, 吉松 正, 菅 浩二, 大安 努, 藤井 弘之1992 年 36 巻 5 号 p. 1162-1168
発行日: 1992/10/01
公開日: 2010/08/10
ジャーナル フリーEMG activities of sternocreidomastoid and trapezius muscles during the isometric maximum voluntary exercises of the head, neck, shoulder, back and mandible were studied in 10 healthy examinees.
These results obtained were as follows:
1. In the sternocreidomastoid muscle, the mean of integrated EMG values showed its maximum on the exercise of the head in which one rotated his mentum contralaterally-rostally forward; in the nuchal and shoulder regions of the trapezius muscle, on the exercise in which one raised his shoulder rostally; and in its back region, on the exercise in which one pulled his shoulder backward.
2. In average, the rates of integrated EMG value on the mandibular exercises to the maximal value on the head, neck, shoulder and back exercises were 9.2 and 19.6% in the superior and inferior regions of the sternocreidomastoid muscle, and 15.4, 1.1 and 8.4% in the nuchal, shoulder and back regions of the trapezius muscle, respectively.
3. These results were discussed in relation to unpleasant sensations on the neck, shoulder and back regions in occlusal diseases.抄録全体を表示PDF形式でダウンロード (1269K)
- |<
- <
- 1
- >
- >|