巻号一覧
32 巻 (1988)
- 6 号 p. 1203-
- 5 号 p. 955-
- 4 号 p. 733-
- 3 号 p. 523-
- 2 号 p. 261-
- 1 号 p. 1-
前身誌
32 巻, 3 号
選択された号の論文の15件中1～15を表示しています
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小木曾 誠, 金田 浩之, 塩田 真, 三羽 敏夫, 和久田 尚, 相川 修二, 魚島 勝美, 益田 高行, 金田 亮二, 富塚 健, 石原 ...1988 年 32 巻 3 号 p. 523-533
発行日: 1988/06/01
公開日: 2010/08/10
ジャーナル フリーFor making the apatite implant easy to apply clinically, the 2-piece apatite implant divided into the root portion and the abutment portion was developed, and at the Tokyo Medical and Dental University hospital it was put to the clinical trial.
Result:
1. During two years from August, 1984 to August, 1986, 310 pieces of the 2-piece implant were applied in 86 cases.
2. As of December, 1987, 299 pieces (96.5%) of the implants applied are uneventful under a normal functional condition.
3. If the bone structure in the corresponding areas is maintained in a favorable condition, the 2-piece implant is applicable in almost all areas of the jaws, thus having a remarkably expanded application scope as compared with the socalled 1-piece implant, that is, the former type implant.抄録全体を表示PDF形式でダウンロード (10917K) -
第1報黄色系オペーク陶材による裏装金属色遮蔽効果潤田 和好, 大友 孝恒, 山本 秀, 鎌田 政善, 板倉 良暢, 北見 元造, 宗像 清貴, 関口 正二1988 年 32 巻 3 号 p. 534-545
発行日: 1988/06/01
公開日: 2010/08/10
ジャーナル フリーTo clarify the color of porcelain fused to metal crowns, We examined opaque porcelain baked on a metal base using a color and color difference meter. The following types of materials were used in fabricating the sample:(1) 84.3% Au-Pt-Pd-Ag alloy, (2) 81.9% Pd-Cu-Ga alloy, (3) 77.0% Ni-Cr alloy, (4) Yellow color opaque porcelains; B1O, B2O, B3O and B4O. The hiding effect on the color of the metal base was examined.
The following results were obtaind:
1. The color of the opaque porcelain fused to the metal was affected by the opaque porcelain color in the case of a 0.10-0.20 mm thick opaque porcelain layer. The hiding effect on the color of the metal base was greater for dark than light colored opaque porcelain. Layers thicker than 0.25 mm were not affected by the opaque porcelain color.
2. The color of opaque porcelain fused to the metal was affected by the metal color for 0.10-0.20 mm thick opaque porcelain layers. The hiding effect on the color of the metal base was as follows; Au-Pt-Pd-Ag alloy was the highest, followed by Ni-Cr alloy, with Pd-Cu-Ga alloy being the lowest. Layers thicker than 0.25mm were not affected by the metal color.抄録全体を表示PDF形式でダウンロード (6213K) -
無歯顎補綴における診断への可能性について寺倉 健1988 年 32 巻 3 号 p. 546-560
発行日: 1988/06/01
公開日: 2010/08/10
ジャーナル フリーThis investigation was carried out to know whether an accurate estimation could be made on the success or failure of dentures by understanding the relationship between tissue thickness and clinical symptoms. Thickness measurements were made by our ultrasonic method on 35 maxillary and mandibular mucosa sites in 100 completely edentulous subjects, and 26 sites in 30 dentate subjects.
Results:
1. In upper edentulous group, the thinnest sites were 1.81 mm in the center of the palate and 1.69 mm in the labial regions ; the thickest sites were 5.81 mm in the rear sides of the palate. Individual differences in the rear of the palate and incisive papilla were large. The dentate appeared similar.
2. Mandibular regions of both were thinner than maxillary regions. Gingival regions in the edentulous were thicker than surrounding regions.
3. In the gingival regions, connection existed between the upper and lower thicknesses.
4. Principal component analysis was made to divide edentulous regions. The upper jaw was divided into palate and gingival. The palate regions had four divisions, while the gingival regions had two.
5. Thickness varied with age, sex, period of denture using, flabbiness and torus.
6. Discrimirient analysis was performed to determine usefulness in estimating clinical symptoms, An accurate estimation of success or failure was possible with a rate of 67% in upper retention, upper prognosis 72%, lower retention 65%, lower pain 65%.抄録全体を表示PDF形式でダウンロード (4595K) -
金属焼付陶材の前装への応用松山 忠司1988 年 32 巻 3 号 p. 561-576
発行日: 1988/06/01
公開日: 2010/08/10
ジャーナル フリーHard resin has been applied for the facings of outer crowns of the cone-telescope denture. Hard resin, however, has limitation as a facing material.
The purpose of this study is to investigate the feasibility of applying metal bonding porcelain for the facings of outer crowns.
The bond strength of 28 kinds of porcelain veneering alloys were measured by bending test in basic experiments. DENTITAN, a BASE METAL ALLOY showed the highest value, and BASE METAL ALLOYS showed higher values than HIGH NOBLE METAL CONTENT ALLOYS. Based on the results of the basic experiments, 6 porcelain veneering alloys were selected to investigate the feasibility of applying metal bonding porcelain as facing material on inner and outer crowns made of each huge of 6 metal. All 6 porcelain veneering alloys showed no significant change in retention strength between inner and outer crowns in 1, 000 times insertion, and there was no damage to the facings. Furthermore, DENTITAN and BYRON which utilizes metallic bonding agent were found to have grater bond strength than others.
DENTITAN and BYRON were found to be suitable materials for applying as porcelain veneering alloy in cone-telescope dentures.抄録全体を表示PDF形式でダウンロード (4153K) -
第1報三次元的動揺量測定装置の開発今井 守夫1988 年 32 巻 3 号 p. 577-587
発行日: 1988/06/01
公開日: 2010/08/10
ジャーナル フリーRemovable prothodontic appliances, particularly such as complete dentures, move three-dimensionally during masticatory movement. It is, therefore, difficult to aquire the stability of dentures during masticatory movement. The purpose of this study is to quantitate the movement three-dimensionally and consecutively as well as to evaluate the stability of the maxillary complete denture during masticatory movement. Firstly, a system for measuring the amount of the movements of maxillary complete denture was developed. The detail of this system is as follows:
1. This system consists of 5 components including Mandibular Kinesiograph (MKG), fiberoptic transducer, sensor fixed equipments, sensor setting-up jig and recorder.
2. This system is able to measure the spatial location of a maxillary complete denture by detecting the movements of the magnet and three dimensional vector independently by fiberoptic transducer and MKG at the same time.
3. The detecting accuracy of this system was approximately 120μm when the amount of movements at the first molar region are±1, 000μm
As a clinical application, movements of maxillary complete denture of an edentulous patient were examined with this system.
1. The amount of denture movements from rest position was observed three-dimensionally and consecutively.
2. Three-dimensional measurements of denture movements made it possible to detect the direction of denture rotation.抄録全体を表示PDF形式でダウンロード (4848K) -
寺田 浩之1988 年 32 巻 3 号 p. 588-600
発行日: 1988/06/01
公開日: 2010/08/10
ジャーナル フリーThe purpose of this study is to estimate the reproducibility of the intercuspation of articulated casts using the silicone bite-impression technique compared with the conventional technique. Using 6 crown cases of the mandibular first molar, the occlusal height and the occlusal contacts reproduced by each technique were measured with the 1P-Checker and articulating paper. For the conventional technique the variation of the hand articulation was also measured.
The following results were obtained.
1.The occlusal height of the silicone bite-impression technique showed lower and narrower scattering than the conventional technique.
2.The reproducibility of the occlusal contacts showed high in the silicone bite-impression technique but low in the conventional technique. For the conventional technique, depending on the cusp inclination, as the cusp inclination became steep, it showed high. The silicone bite-impression technique was not influenced very much and proved to be superior to the conventional technique with regard to the reproducibility of the intercuspation and its stability.
3.The hand articulation in the conventional technique showed narrow variation for the steep cusp inclination, but wide variation for the gentle cusp inclination and could have an influence on the reproducibility of the intercuspation.抄録全体を表示PDF形式でダウンロード (10915K) -
1. シリコーン・ブラック法における咬みしめ強度村田 洋一1988 年 32 巻 3 号 p. 601-609
発行日: 1988/06/01
公開日: 2010/08/10
ジャーナル フリーThe purpose of this study is to clarify the necessity of controlling bite force at taking the silicone-black.
Firstly, occlusal contact area of total and every tooth was measured in order to investigate the relationship between bite force and occlusal contact area. Secondly, the reproducibility was investigated, bite force with the best was selected.
The results obtained were as follows:
1) From luminance of the silicone-black, occlusal contact area was measured by the digital image processing system.
2) Occlusal contact area was affected by bite force.
3) When the level of muscle contraction was at 30% and 40% of root mean square of the maximal EMG in the masseter muscle, the silicone-black method had the best reproducibility.抄録全体を表示PDF形式でダウンロード (2758K) -
西山 則子, 村井 正剛, 池田 直美, 山下 敦1988 年 32 巻 3 号 p. 610-617
発行日: 1988/06/01
公開日: 2010/11/26
ジャーナル フリーThis study evaluated the compressive strengths of four kinds of porcelain-fused-to-foil crown and porcelain-fused-to metal (PFM) crowns on metal dies of upper central incisor. Both crown types were veneered fully with feldspathic porcelain. The two types of crowns were cemented to dies with zinc phosphate cement (ZPC) or adhesive resin Panavia EX. The compressive strength was measured by loading in the direction of 45° lingually to the long axis of the tooth, or in the direction of the long axis.
The results were as follows:
1. At first, the load was given in the direction of 45° lingually. When cemented with ZPC, the compressive strength of the porcelain-fused-to-foil crowns, 38±5 kg was statistically lower than that of the PFM crowns, 75±24 kg. When cemented with Panavia Ex, the compressive strength of PFM crowns increased significantly, 62±17 kg.
2. Next, the load was given in the direction of the long axis of the tooth. The compressive strength of porcelain-fused-to-foil crowns cemented with ZPC was 84±14 kg and that of PFM crowns cemented with Panavia EX was 110±15 kg.
3. No significant difference was observed between the compressive strength for four kinds of the porcelain-fused-to-foil crowns.
4. The compressive strength of the porcelain-fused-to-foil crowns may possibly be adequate to withstand the functional forces such as mastication.抄録全体を表示PDF形式でダウンロード (6765K) -
川原 光正, 吉田 圭一, 熱田 充1988 年 32 巻 3 号 p. 618-623
発行日: 1988/06/01
公開日: 2010/08/10
ジャーナル フリーOne of the weak points in the acrylic resin veneered crown as compare with the bonded porcelain crown is that a mechanical retention should be indispensable to fix the resin onto the metal frame. Introduction of the adhesive opaque resin into the fabrication of the veneered crown is expected to omit such the mechanical retention. The retention beads, however, could not be excluded completely due to the less endurance of commercially available adhesive-opaques. The aim of this study is to clarify how much beads could be remove without damaging the adhesive strength and the marginal seal. It was shown that the removal of beads by 50% from the center of the veneered portion decreased the adhesive strength to about 60-80%, whereas permitted the marginal leakage of 2-5% after subjected to the thermal cycles of 10, 000 times.抄録全体を表示PDF形式でダウンロード (4039K) -
美馬 さとみ1988 年 32 巻 3 号 p. 624-638
発行日: 1988/06/01
公開日: 2010/08/10
ジャーナル フリーThe purpose of this paper is to study the morphology of occlusal facets which suits a proper jaw movement. A theoretical base surface in order to determine the morphology of occlusal facets was designed with the assumption that occlusal contacts exist on both intercuspal position and eccentric position. The three-dimensional morphology of the occlusal facets in 3 subjects with normal dentition was recorded. The data of the three-dimensional morphology were compared with those of the theoretical base surface.
The results were as follows:
1. A occlusal reference surface was deviced as the theoretical base surface. This surface consists of various paths of mandibular movements or complementary mandibular movements.
2. Occlusal facets with large area show a tendency of increasing number of occlusal facets which are in good accordance with the occlusal reference surface.
These data indicate that the idea of the occlusal reference surface is clinically applicable.抄録全体を表示PDF形式でダウンロード (10040K) -
金林 卓哉1988 年 32 巻 3 号 p. 639-653
発行日: 1988/06/01
公開日: 2010/08/10
ジャーナル フリーIn order to study the influence of dentures on the supporting mucosa, histological and immunohistochemical observations were done on the hard palates of monkeys after being subjected to mechanical stimuli using experimental dentures. The following results were obtained:
1. Light microscopic observations revealed that changes for the most part occurred superficial to the connective tissue papilla. Although there was an overall decrease in the thickness of the epithelium, a marked thickening was observed in the stratum corneum.
2. SEM observation revealed desquamative changes and a decrease in the exfoliation of keratinized cells of the epithelial surface in the indentation region. Changes were observed in the direction of the connective tissue papilla, and after 20 days changes were observed in the shape itself of the connective tissue papilla.
3. TEM observation revealed a tendency for the shape of the cells in the basal epithelium in the region under pressure to become smaller after 10 days. No difference was observed with the controls in the prickle cells or above.
4. Although nuclei taking in Bromodeoxyuridine decreased considerably in the region under pressure, the degree of decrease was fixed and no change was observed with time.抄録全体を表示PDF形式でダウンロード (11881K) -
前歯部の動揺量について田中 球生1988 年 32 巻 3 号 p. 654-667
発行日: 1988/06/01
公開日: 2010/08/10
ジャーナル フリーThe goal of this study was to obtain basic data for the clinical evaluation of full dentures, and to investigate quantitatively and three dimensionaly for every phase of mandibular movement, the mobility at the anterior teeth of maxillary full dentures during function.
The subjects were seven people having maxillary and mandibular full dentures with good retention and stability. Measurements were performed during clenching, tapping and mastication.
It was found that the maxillary denture moved in a regular pattern together with mandibular movements during tapping and during the middle phase of mastication, and it was possible to establish and measure translation parameters for each phase of mandibular movement.
From the results of analyzing the parameters for each translation using three foods, boiled fish paste, peanuts and dried squid, a significant difference was observed between the amount of anterior/posterior translation after entering the occlusal phase, and the total amount of translation in the lateral and vertical directions.抄録全体を表示PDF形式でダウンロード (3783K) -
仮着材と清掃法の影響藤井 宏1988 年 32 巻 3 号 p. 668-678
発行日: 1988/06/01
公開日: 2010/08/10
ジャーナル フリーThe purpose of this study is to know the influence of pre-treatment of abutment tooth before final cementation, and to compare the retention force of crown.
The effect of pre-treatment were observed with regard to the surface form of the abutment tooth (masurement of surface roughness and observation of SEM images), the adaptability, the retention force all after final cementing and the pigment premeability. As a result, the following findings were made:
1. The surface roughness (Rmax, Rz) was found to have decreased as a result of the use of a cleaner, regardless of the type of temporary cementing material used.
2. When a cleaner was used, the vertical raise up the crown by the cement was noted to have decreased slightly.
3. Regardless of whether a cleaner was used or not, no decrease in retention force was used or not.
4. In the pigment permeability test, suppression of pigment permeability was noticed, regardless of the type of temporary cementing material used and also of whether a cleaner was used or not.抄録全体を表示PDF形式でダウンロード (11157K) -
焼付強度ならびに陶材表面性状からの最適焼成温度の検討塩野 英昭1988 年 32 巻 3 号 p. 679-691
発行日: 1988/06/01
公開日: 2010/08/10
ジャーナル フリーIn this study, the author, applying infra-red radiation furnace“Technomat”, investigatedthe influence of firing temperature to the property of porcelain. Three Ni-Cr alloys andtheir specified porcelain powder were examined, push shear bond test, surface roughness measurment (Rmax, Rz) and SEM analysis of porcelain surface were carried out.
1. Shear bond strength was maximum under the condition 20°C lower than recommendedtemperature by 2 Beryllium-free alloys, although by Beryllium containing alloy under the specifiedtemperature (960°C) the bond strength was maximum.
2. Through surface roughness measurment, those fired under 20°C lower than the specifiedtemperature showed glazed texture by every porcelain, therefore this condition is consideredclinically optimum.
3. Observating surface texture by SEM analysis, the higher firing temperature becomes, themore intensely the porcelain particle's fusing undergoing.
4. Shear bond strength of low Cr containing alloy showed generally weak despite decreaseof firing temperature. Increase of firing temperature for high Cr containing alloy demonstrated anincrease of bond strength value. By Beryllium-containing alloy revealed high coefficients of firingtemperature versus bond strength value.抄録全体を表示PDF形式でダウンロード (7030K) -
第1報重合条件の影響について吉田 圭一1988 年 32 巻 3 号 p. 692-705
発行日: 1988/06/01
公開日: 2010/08/10
ジャーナル フリーWith a view to investigate the effects of curing conditions of monomers on the propertiesof visible-light cured veneering resin, triethylene glycol dimethacrylate (TEGDMA) and di (methacryloxyethyl) trimethylhexamethylene diurethane (UDMA) were photo-polymerized andKnoop hardness numbers and amount of eluted monomers were measured. Properties of thepolymers were evaluated with various irradiation times and temperatures.
Maximum Knoop hardness number of the photo-polymerized resin was obtaind at an area of0.5 mm depth from the surface with gradual decrease in hardness at the deep area.
Curing behavior of TEGDMA was different from that of UDMA.
Hardness number of the latter polymer being scarcely influenced with the depth, that of theformer polymer gradually decreased with increase in depth.
TEGDMA-UDMA copolymers showed nearly the same characters as UDMA homopolymer.
TEGDMA being polymerized uniformly by heating except for surface area, hardness numberat 0.5 mm depth obtained from heating after photo-curing was superior to that obtained from heating.
Conversion of TEGDMA, which was not cured uniformly, showed higher value than that of UDMA.
Clinically acceptable polymers with excellent properties could be obtained by heating afterextended irradiation.抄録全体を表示PDF形式でダウンロード (1970K)
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