巻号一覧
39 巻 (1995)
- 6 号 p. 965-
- 5 号 p. 793-
- 4 号 p. 621-
- 3 号 p. 441-
- 2 号 p. 213-
- 1 号 p. 1-
前身誌
39 巻, 3 号
選択された号の論文の20件中1～20を表示しています
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小川 隆広, 古谷野 潔, 末次 恒夫1995 年 39 巻 3 号 p. 441-446
発行日: 1995/06/01
公開日: 2010/08/10
ジャーナル フリーThe purpose of this study was to analyze the mechanism of the disclusion of posterior teeth during mandibular protrusive movement. Clinical examination was performed on 67 normal young adults, and they were divided into two groups: disclusion group and non-disclusion group. The protrusive movement was measured with the 3-dimensional mandibular movement analyzing system which can analyze movements in six-degrees of freedom, and the occlusal curve on the lower 2 nd molar was evaluated using the 3-dimensional digitizer.
The sagittal inclinations of both incisal and condylar paths were significantly greater in the disclusion group than in the non-disclusion group. Especially, the difference of the incisal path inclination between them was almost 15 degrees. There was also a significant difference in their occlusal curves ; the occlusal curve in the disclusion group was steeper than that in non-disclusion group. The method of anterior guidance determination proposed by Kohno and Nakano was found to be effective for establising the posterior disclusion during protrusive movement. The findings of this study suggest that the inclination of the anterior guidance greatly contributes to the occurrence of the posterior disclusion, in comparison with the inclination of the posterior guidance and the steepness of the occlusal curve.抄録全体を表示PDF形式でダウンロード (1209K) -
第1報試験片形状決定のための応力解析南 弘之, 山邉 成志, 中島 厚生, 野村 賢介, 嶺崎 良人, 竹之内 泰巳, 鬼塚 雅, 自見 忠1995 年 39 巻 3 号 p. 447-452
発行日: 1995/06/01
公開日: 2010/08/10
ジャーナル フリーPrior to the evaluation of the tensile adhesive strength of dental porcelain to castable glass ceramic, stress distribution was analyzed to determine the configuration of the tensile test pieces, by using the photoelastic stress analysis method. On the assumption that 3 type tensile test pieces of dental porcelain baked on castable glass ceramics, 3 photoelastic test models consisting of two layers were made of epoxy resin. A 2 kgf tensile load was added to each model, and the stress was maintained. The stress distribution of the median section was analyzed.
The results were as follows:
(1) The tensile stress was observed at the castable glass ceramic-porcelain interface of all test models.
(2) Stress concentration effects were significant at the periphery of castable glass ceramic-porcelain interface in two of 3 test models.
(3) Uniform tensile stress was observed at the castable glass ceramic-porcelain interface in only one of 3 test models.抄録全体を表示PDF形式でダウンロード (3812K) -
櫻井 直樹1995 年 39 巻 3 号 p. 453-463
発行日: 1995/06/01
公開日: 2010/08/10
ジャーナル フリーThe purpose of this study was to investigate the quantitative occlusal condition of patients with internal derangement of TMJ. To achieve this purpose, the shape of the occlusal table of the upper molars was scanned, and reference points were obtained and compared with the 3-dimensional movement of the mandible in a lateral occlusal position when a fixed incisal point was 2mm distant from the intercuspal position. Eighteen subjects with internal derangement of TMJ: the patient group, and eighteen asymptomatic subjects: the control group, were selected for this investigation.
The results were as follows: 1) the angle of the condylar path of the nonworking side and the path of the lower molars on the nonworking side was larger in the patient group than in the control group ; 2) the inclination of the cusp slope of the upper molars of the nonworking side in the patient group tended to be larger than that of the control group, especially in the second molar, where this difference was statistically significant ; 3) the interocclusal distance between upper and lower second molars in the nonworking side of the patient group tended to be smaller than that of the control group, but it was statistically insignificant.抄録全体を表示PDF形式でダウンロード (5013K) -
VI-2. 上顎, 下顎あるいは上下顎両側第一大臼歯歯根膜麻酔における咬合力の方向大森 洋一1995 年 39 巻 3 号 p. 464-474
発行日: 1995/06/01
公開日: 2010/08/10
ジャーナル フリーIn order to determine the effects of craniofacial form and periodontal mechanoreceptors on the direction of bite force, this study classified the bite force during vertical clenching in four steps, namely, the bite forces under no anesthesia, lower-jaw anesthesia, upper-jaw anesthesia and upper/lower-jaw anesthesia. The correlation of direction of bite force with craniofacial form was evaluated. The conclusions were as follows:
1. Comparison of anesthetic environments in each designated range of direction of bite force (θ and θ') The directions of bite force (θ and θ') were similar in both 100% and 75% MC in both the increased and maintained portions regardless of the anesthetic environment. Significant differences (p<0.05) were noted between anesthetic environments in 50% and 25% MC except between no anesthesia and upper anesthesia and between lower anesthesia and upper/lower anesthesia.
2. Correlation of 11 measured items on craniofacial form and the direction of bite force
For no anesthesia and upper anesthesia, significant correlations were found in Ar-Go-Me and AG-KR for θ, and Ar-Go-Me, MM-OP, SN-OP, MP-OP, CC⊥AG-KR and CC⊥F for θ' in each of the designated ranges.
For lower anesthesia and upper/lower anesthesia, significant correlations were found with no anesthesia in θ and θ'. Further, a significant positive correlation was found in 50% and 25% MC in MM-OP for θ.抄録全体を表示PDF形式でダウンロード (2388K) -
IV-1.下顎総義歯の中心咬合位について吉岡 眞弘1995 年 39 巻 3 号 p. 475-482
発行日: 1995/06/01
公開日: 2010/08/10
ジャーナル フリーThe present study was conducted to elucidate the influence of lower complete denture on various aspects of bearing stress of the denture foundation during mastication and to investigate retention, stability and support of complete denture. A bearing stress measuring system and mandibular edetulous simulation model were utilized to evaluate distribution and movements of bearing stress on alveolar mucosa and alveolar bone with the lower complete denture at the centric occlusion.
The results were as follows:
1. Bearing stress distribution
1) The bearing stress on the alveolar bone was much lower than that on alveolar mucosa.
2)The bearing stress on top of the alveolar ridge was higher than that on the other measuring points in both alveolar mucosa and alveolar bone and was particularly high at the site which corresponds to central incisor. The next highest bearing stress was found on the denture border, with less stress in the order of buccal, lingual and retromolar pad regions.
2. The bearing stress movement
1) The duration of bearing stress on the alveolar bone was shorter than that on alveolar mucosa, and very long on the retromolar pad region.
2) The duration of bearing stress is approximately equal to load reaching time. It is very reduced on the retromolar pad, lingual side of palate border, and top of retromolar pad.抄録全体を表示PDF形式でダウンロード (1963K) -
第2報実験的口蓋床の影響山村 理, 松本 修, 堀井 規隆, 吉光 泰一, 竹内 幹生, 三村 真一, 竜門 幸司, 小木曽 明, 前田 弌郎, 丸井 義仁, 藤井 ...1995 年 39 巻 3 号 p. 483-488
発行日: 1995/06/01
公開日: 2010/08/10
ジャーナル フリーAn acoustic analysis system, MacSpeech Lab II, that could extend time duration, was utilized and it was attempted to observe changes of stop consonants while wearing experimental palatal plates.抄録全体を表示PDF形式でダウンロード (4471K) -
院内感染対策教育への応用三田 和弘, 前田 芳信, 石井 和雄, 野首 孝祠1995 年 39 巻 3 号 p. 489-493
発行日: 1995/06/01
公開日: 2010/08/10
ジャーナル フリー“Infection control” is one of the major concerns for people involved in dentistry as well as patients. To achieve an adequate level of infection control in the dental office, everyone must have sufficient basic and clinical knowledge. We developed a computer system for education of infection control utilizing an authoring software and a multimedia system including video presentation. To evaluate the system efficiency, this system was used by dental students attending our clinical training course. By comparing the pre- and post-assessment conducted by the written form tests and interview with students, it was concluded that our system has a great capability for educating the infection control among personal related to clinical dentistry.抄録全体を表示PDF形式でダウンロード (5659K) -
星合 和基, 金澤 毅, 平沼 謙二, 太田 功, 福井 壽男, 森 博史, 長谷川 明1995 年 39 巻 3 号 p. 494-500
発行日: 1995/06/01
公開日: 2010/08/10
ジャーナル フリーVarious self-curing resins are used in provisional restorations and denture repairs, but the existing products cause some problems, compared with heat-cured resin. Color stability of provisional restorations is one of the most important clinical aspects.
This study was conducted to evaluate the color stability, physical properties and dimensional stability of a new self-curing resin, which was developed by changing the catalizer of the monomers.
The new self-curing resin showed the following results compared with existing products:
1. It showed good color stability and no discoloration.
2. The mechanical properties showed no significant differences.
3. Dimensional stability was better than that of existing products.抄録全体を表示PDF形式でダウンロード (4957K) -
第3報臼歯人工歯の咬合面形態の差が負担圧分布に及ぼす影響井上 三四郎, 河野 文昭, 永尾 寛, 岡 謙次, 友竹 偉則, 松本 直之1995 年 39 巻 3 号 p. 501-510
発行日: 1995/06/01
公開日: 2010/08/10
ジャーナル フリーIn making a complete denture, the selection of the artificial posterior teeth is one of the important factors to obtain denture stability and to avoid high pressure applied to the supporting structure under a denture. The purpose of this study was to investigate the influence of the occlusal surface of the artificial posterior teeth on the pressure distribution under a complete denture.
The results were as follows:
1. In centric occlusion, the occlusal surface of different artificial teeth did not affect the pressure distribution under the complete denture.
2. In one-side occlusion, the pressure values were changed remarkably in the buccal area on the working side and palate area as compared with the pressure distribution under the complete denture with two different artificial teeth.
3. In one-side occlusion at an eccentric position, the occlusal surfaces of the artificial teeth affect the pressure distribution under the complete denture. The pressure values under the lower denture with Bio-Ace artificial posterior teeth increased on the nonworking side.抄録全体を表示PDF形式でダウンロード (3831K) -
松村 英雄, 平 曜輔, 吉田 圭一, 田中 卓男, 熱田 充1995 年 39 巻 3 号 p. 511-516
発行日: 1995/06/01
公開日: 2010/08/10
ジャーナル フリーThis in vitro study evaluated adaptation and stability of denture bases processed by means of induction -heating (Mak press), traditional pack - and - press (JIS), low - temperature - curing (LL), microwave-curing (MC), and rapid-curing (QA) techniques. Specimens were fabricated with the heat sources and cooled to room temperature. Adaptation of denture bases was determined immediately after deflasking. The specimens were continuously immersed in water and the change of adaptation was examined for up to 180 days. Adaptation of Mak press-processed specimens was comparable to that of LL- or MC-processed specimens. Most of the denture bases demonstrated improved fit with elapse of immersion time.抄録全体を表示PDF形式でダウンロード (1185K) -
渡部 厚史1995 年 39 巻 3 号 p. 517-529
発行日: 1995/06/01
公開日: 2010/08/10
ジャーナル フリーThe purpose of this study was to elucidate the interocclusal clearance between opposing upper and lower molars on the working side during lateral excursions. Three-dimensional scannings were made of both the shape of occlusal surfaces and jaw movements, and the data of the occlusal shape of the upper first molar was used to divide the tooth into 6 sections on the computer. The analytic parameters employed are the area of the region on the sections of the upper first molar, where the distance from its counterpart was equal to less than 0.3 mm (contact region) and 1.0mm (near contact region) in the intercuspal position and the four lateral positions. The aspect of changes of two regions was observed for the different sections.
The results were as follows As the mesio-palatal section of the upper molar became separated from its counterpart more rapidly than any other section, the closing space, which opens in the mesio-palatal direction, was found between the opposing upper and lower molars on the working side during lateral movement. This is called the Squeezing Room and it is considered to be a place for crushing and compressing the food during mastication, and controls the flow of food on the occlusal surface.抄録全体を表示PDF形式でダウンロード (10433K) -
築山 能大, 古谷野 潔, 末次 恒夫1995 年 39 巻 3 号 p. 530-534
発行日: 1995/06/01
公開日: 2010/08/10
ジャーナル フリーA speed analysis of mandibular movements is one of the most useful methods to obtain important information for evaluating stomatognathic function. The purpose of this study was to clarify the characteristics of the speed at incisors, molarsand condyles during jaw opening and closing movement. Mandibular movements in 40normal subjects were measured with Kyushu University 3-D movement analyzing system; then the speed at each analyzing point was calculated.
The results were as follows:
1. Speed curves (speed versus moved distance curves) were displayed graphically, then speed patterns were divided into two types ; the single peak pattern and the dual peak pattern.
2. Speed patterns of incisor and firstmolars were single peak not only in opening but also in closing. Speed patterns of condyles were single peak in closing, but were single or dual peak in opening. Some condyles showed both single and dual peak in opening during a series of measurements.
3. There was a relation between the speed pattern of condyles in opening and the curvature of the condylar path.抄録全体を表示PDF形式でダウンロード (980K) -
住吉 圭太, 小川 隆広, 古谷野 潔, 築山 能大, 末次 恒夫1995 年 39 巻 3 号 p. 535-541
発行日: 1995/06/01
公開日: 2010/08/10
ジャーナル フリーThe purpose of this study was to reveal the 3-dimensional movements during mastication in normal subjects, in terms of averaged paths of incisal, molar and condylar points. Masticatory movements were measured on 40 normal young adults usingthe mandibular movement analyzing system in six degrees of freedom. The averagedpaths were drawn after computerized calculation of the 3-dimensional position ofeach analyzing point at every 10% level on each trajectory. The results were as follows:
1. The maximum opening at the incisal, working-side molar and nonworking-side molar points during mastication were 13.28 mm, 9.53 mm and 9.96 mm, respectively. The amount of maximum anterior displacement of condylar points were3.61 mm on the working-side and 5.37 mm on the nonworking-side.
2. The shapes of the envelope of the incisal, working-side molar and nonworking-side molar points were similar to each other in the frontal plane; however, they were different in the sagittal plane, especially in the closing phase.
3. The deviationof the incisal path and molar paths were induced by not only the difference of anterior displacement of bilateral condyles, but also lateral excursion.抄録全体を表示PDF形式でダウンロード (1557K) -
第2報金銀パラジウム合金と常温重合レジンの接着清水 博史, 羽生 哲也, 森山 尚子, 森 宣昭, 井上 弘明, 吉永 正康, 新郷 由起子1995 年 39 巻 3 号 p. 542-548
発行日: 1995/06/01
公開日: 2010/08/10
ジャーナル フリーThe purpose of this study was to firmly join denture base resin or repair resin to a metal foundation or metal parts of removable partial denture with adhesive metal primers.
In this report, the effect of six kinds of primer on the bondstrength of a self-curing resin bonded to silverpalladium-copper-gold alloy was tested. The primers used for this study were METAL PRIMER, CESEAD OPAQUE PRIMER, New METACOLOR OPAQUE BONDING LINER, ACRYL BOND, TOKUSO REBASE MR. BOND and SOLIDEX METAL PHOTO PRIMER.
The specimens were thermocycled in water for up to 5, 000 cycles at 4°C to 60°C, and the shear bond strengths were recorded.
The conclusions are as follows:
1. The most recommended method to firmly join self-curing repair resin to silver-palladium-coppergold alloy is to prime with METAL PRIMER after polishing by air abrasion with 50 pm alumina particles.
2. One of the acceptable conditions when METAL PRIMER is used may be to polish metal surfaces by air abrasion with alumina.抄録全体を表示PDF形式でダウンロード (1603K) -
第1報模型実験と有限要素解析の対応榎本 佳代子, 前田 芳信, 岡田 政俊, 西田 圭, 野首 孝祠, 堤 定美1995 年 39 巻 3 号 p. 549-554
発行日: 1995/06/01
公開日: 2010/08/10
ジャーナル フリーThe stress distribution underneath denture base and the resorption of alveolar bone are closely related to each other. In our recent studies with three-dimensional and two-dimensional finite element methods (2-D and 3-D FEM), the stress distribution was evaluated for removable dentures and their supporting structures. The purpose of this study was to validate the 3-D FEM and 2-D FEM models with experimental model as well as to compare the 3-D analysis with 2-D analysis. According to our results, the stress distribution of 3-D FEM was similar to the results of the experimental model. 2-D FEM tended to show exaggerated results compared with those 3-D FEM.抄録全体を表示PDF形式でダウンロード (4978K) -
角谷 真一, 佐藤 隆志, 中島 啓一朗, 原 哲也, 白井 肇, 森 慎吾, ウタマ モハッマドダルマ, 阿部 俊彦1995 年 39 巻 3 号 p. 555-561
発行日: 1995/06/01
公開日: 2010/11/26
ジャーナル フリーThe purpose of the present study was to estimate the qualitative dynamics of bone tissue under denture base caused by lack of self-cleaning as a result of coverage by denture base, utilizing double labeling technique with bone markers and contact microradiography.
The experimental denture base was designed to make contact with molar region of the palate of rat and to transmit no occlusal forceto the tissues under the denture base. The denture base was not removed throughout the experimental period. This procedure caused lack of self-cleaning, and it also caused continuous pressure to be applied to palatal tissues under the denture base by the accumulation of exfoliative horny cells, which induced bone resorption and formation under the denture base.
The results were as follows:
1. Two to three weeks after the insertion of the denture base, number of osteoclasts and Howship's lacunae were observed on the palatal surface of hard palate bone tissue under the denture base. In the same observation period, increased bone formation was observed on the nasal surface.
2. Four to six weeks after the insertion of the denture base, increased bone formation was observed on the palatal surface of hard palate bone tissue under the denture base. Bone formationwas observed mainly in Howship's lacunae, and only slight bone formation was observed in other region. 3. The first one week and from seven to ten weeks after the insertion of the denture base, bone formation was suppressed on the palatal surface of hard palate bone tissue under the denture base.抄録全体を表示PDF形式でダウンロード (3441K) -
佐藤 裕二, 朝原 早苗, 湯浅 良孝, 久保 隆靖, 足立 真悟, 赤川 安正1995 年 39 巻 3 号 p. 562-566
発行日: 1995/06/01
公開日: 2010/08/10
ジャーナル フリーTo establish science-based I -bar clasp design of removable partial denture (RPD), the dimension of I -bar clasps of RPD patients was measured, and the stiffness and stress distribution of these I -bar clasps were evaluated with the finite element method. The results were as follows
1. The thicknesses and widths incross-sections of I -bar clasps were 0.3-1.0.
2. The width of the taper of horizontal arms of I -bar clasps was the largest (0.09).
3. The stiffness of I -bar clasps was greater than that of mechanical ideal I -bar clasps.
4. The stress analysis suggests a possibility of fatigue fracture or permanent deformation of I -bar clasps.
5. It may be more preferable to fabricate I -bar clasp arms thinner than commonly used arms. An Ibar clasp with a taper of 0.02 in width is preferred.抄録全体を表示PDF形式でダウンロード (1000K) -
鈴木 清貴1995 年 39 巻 3 号 p. 567-578
発行日: 1995/06/01
公開日: 2010/08/10
ジャーナル フリーComplete denture wearers rarely complain about TMJ disorders. However, there aremany morphological differences of the condyle in complete denture wearers. The purpose of this study was to clarify the relationship between morphological factors of condyles and the path of protrusive mandibular movements in complete denture wearers. The subjects consisted of 107 complete denture wearers (42 males, 65females, mean age 69.7 years) without symptoms involving the TMJ. The shape, theabnormal bone changes and the size of the right and left condyles were examined by panoramic radiography. Horizontal mandibular movements were recorded for lateral deviation during protrusive movement by gothic arch tracing.
The resultswere as follows:
1. The shapes of the condyle were classified in four types.Type I (round) was 111 condyles (51.9%), Type II (flat anterior portion) was 34 condyles (16.2%), Type III (flat top portion) was 31 condyles (14.5%) and Type IV (flat posterior portion) was 38 condyles (17.7%).
2. The abnormal bone changes of condyle were found in 56 cases (77 joints, 36.0%). The bone changes of condyle were Erosion, Osteophyte, Flattening, Concavity, Deformity, Irregular surface and Eburnation.
3. A difference of the size of the right and left condyles was found in 32 cases (29.9%).
4. The average lateral deviation during protrusive mandibular movement was 1.0±0.6 mm (male 0.8mm, female 1.1 mm)
5. In case of less lateral deviation, the Type I tended to increase, but in case of much lateral deviation, the Type III tended to increase.
6. Much lateral deviation during protrusive movement in patients appeared in a high ratio in relation to the difference of the size of condyle, abnormal bone changes of condyles and morphological changes of condyle shape.抄録全体を表示PDF形式でダウンロード (6202K) -
偏心性咬合干渉装置による影響木本 克彦1995 年 39 巻 3 号 p. 579-589
発行日: 1995/06/01
公開日: 2010/08/10
ジャーナル フリーA study was conducted to evaluate the influence of the pathway near intercuspal position (ICP) during chewing movements when eccentric occlusal interference wasartificially created for dysfunction.
Eight subjects were selected, and the criterion was to show a type of B-W chewing pattern. Chewing patterns were recorded by Sirognathograph Analyzing System III (Siemens, Germany).
The results were as follows:
1. Chewing patterns on the non-occlusal interference side showed significant differences for both opening-grinding path (OGP) and opening path (OP) in both frontal and horizontal planes, whereas those on occlusal interference side showed significant differences for closing-grinding path (CGP).
2. Regarding stability of the chewing pathway, the opening pathway showed more remarkable variations than the closing pathway. Significant variations in the opening-grinding path (OGP) and opening path (OP) in horizontal plane were shown onthe non-occlusal interference side.
3. A serial change of chewing patterns was more remarkable immediately after insertion of an experimental prematurity onthe non-occlusal interference side than in occlusal interference.
4. In comparison of angular measurements during movement between frontal and horizontal planes, more variations and less stability were recognized in the latter than in the former.
5. This study enabled overlapping of the displays of tooth grinding curved surfaces and the chewing pathways, contributing useful informations for a diagnosis of occlusal function.抄録全体を表示PDF形式でダウンロード (5388K) -
本村 一朗1995 年 39 巻 3 号 p. 590-600
発行日: 1995/06/01
公開日: 2010/08/10
ジャーナル フリーIn the future, titanium is expected to be commonly used as a prosthetic material. For application of titanium in dentistry, the technique to fuse porcelain to titanium is necessary and important because of the large aesthetic demand of the general public. However, the bonding strength of the porcelain system fused to titanium is not clearly confirmed. The purpose of this study was to define the effect of the titanium surface texture on the bonding strength of porcelain for titanium veneering. Two variations of the porcelain system for titanium were investigated, one using a bonding agent and the other using a bonding porcelain. The selected factors of the surface texture were the preparation process of the titanium plate (cut from an ingot, casting, chemically polished after casting), withor without sandblasting and with or without heat treatment for surface oxidation. The porcelain was baked according to the manufacturer's instructions. The bonding strengths of the porcelain fused to titanium were measured by a shear bond test. The bonding strength of the porcelain system with a bonding agent was weak due to the poor strength of the bonding agent itself, however, that with a bonding porcelain increased when the titanium surface was rough.抄録全体を表示PDF形式でダウンロード (12038K)
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