著者

小澤 美保子

出版者

社団法人 日本補綴歯科学会

雑誌

日本補綴歯科学会雑誌 (ISSN:03895386)

巻号頁・発行日

vol.36, no.4, pp.727-740, 1992-08-01 (Released:2010-08-10)

参考文献数

48

被引用文献数

1

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The purpose of this study was to investigate effects of typical Japanese eating positions on mandibular movement and EMG activities in head and neck muscles during chewing.10 males chewed gums of 3 different hardness (soft, medium and hard) in cross-legged sitting (CL), chair sitting (CS) and standing (S) positions. Mandibular movement and surface EMG signals were recorded. In each position during chewing, head movement (HM) and forward inclination of the head and body (FIH, FIB) were measured by photography.The results were as follows:1. Maximal vertical displacement was the largest in CL position in chewing of hard gum.Maximal opening velocity was the largest in S position in chewing of medium gum. Opening phase time, closing phase time and cycle time were the longest in CL position in chewing of medium and hard gum.2. Burst duration was the longest in CL position in chewing of all gums. Muscle activities at anterior temporal, posterior temporal, masseter and nuchal region of the trapezius muscles were most increased in CL position in chewing of medium and hard gum.3. HM was the largest in S position while FIH and FIB were the largest in CL position in chewing of all gums.

著者

満木 志おり 前川 賢治 水ロ 一 窪木 拓男 松香 芳三 山下 敦

出版者

社団法人 日本補綴歯科学会

雑誌

日本補綴歯科学会雑誌 (ISSN:03895386)

巻号頁・発行日

vol.43, no.3, pp.451-456, 1999-06-10 (Released:2010-08-10)

参考文献数

26

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The analgesic effects of amitriptyline was evaluated in 11 patients with chronic orofacial pain. The patients visited Fixed Prosthodontic Clinic, Okayama University Dental Hospital with the complaint ofchronic orofacial pain. They had been treated for more than six months with occlusal appliance or physicaltherapy before this study was started, and did not have good treatment results. Ten mg per day ofamitriptyline was started, and the amount was increased gradually depending on the patient's symptoms. Themaximum dose in this study was 70 mg in one patient and most of them were receiving under 50 mg/day. Theresults indicated that amitriptyline was effective in 9 of 11 patients. Two patients showed severe side effectsand stopped receiving it. It was concluded that amitriptyline is effective in the treatment of severe chronicorofacial pain. However, there were side effects with this medicine, so it is necessary to know the effects andside effects when administering it to orofacial pain patients.

著者

田端 義雄

出版者

社団法人 日本補綴歯科学会

雑誌

日本補綴歯科学会雑誌 (ISSN:03895386)

巻号頁・発行日

vol.27, no.4, pp.731-748, 1983-08-01 (Released:2010-08-10)

参考文献数

45

被引用文献数

2

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Taking an impression is an important clinical step in prosthetic dentistry because it links the treatment work and model technique together. Since the fabrication of the prosthesis requires indirect techniques, there are many high quality, newly developed materials available. However, hydrocolloid impression is one which has been used for quite some time. Compared with the others, the hydrocolloidimpression material has several advantages such as hydrophilia, better flow, and no requirement of pressure or mixing. But there are some disadvantages that have been pointed out: dimensional instability, weak gel strength, and impartation of a rough surface to dental stone. Many efforts have been made to alter its undesirable properties, yet still some remain. By using 4 types of hydrocolloid impression materials in two group-a) Rubberloid heavy bodied and 5/16 small stick (VAN-R) and b) Politube reqular and 3/8 stick white (SURGIDENT) and 12 types of model stones (9 dental improved hard stone and 3 hard stone), the following parameters were investigated: (1) dimensional stability, (2) accuracy, (3) effect of tray design, (4) detail reproduction, (5) surface character of stone model, and (6) the effect of fixation. According to the results obtained, the following observations can be made:(1) The hydrocolloid impression material maintained in a supersonic humidifier (100% humidity) or in a wet box (85-90% humidity) had minimal weight change while those kept in the open room environment (50% humidity) or in water were unstable. But the dimensional stability of stone casts derived from the hydrocolloid impression of the original bridge die was poor under all condition used. This suggested that a short time interval between the impression work and stone pouring as well high humidity would give good results.(2) When different stone types having different setting expansion values were used, there was no correlation between the degree of deformation and setting expansion values. Therefore dimensional changes can not be explained solely by setting expansion of the stone.(3) Comparing the retention ability of hydrocolloid impression material with different tray forms, there were the same dimensional changes with both the rimlock type tray and that without the undercut. This suggests that there is no retentive effect in the horizontal vector. The retention due to vis or perforations was similiar. Therefore separation of the impression material from the tray after the impression work probably influences dimensional change.(4) Concerning the reproduction of detail, all the hydrocolloid impression materials gave a good reproduction of a 10μm wide line, but there were differences with different dental stone. The stone crystal granule size giving good reproducibility was 5μm, and that giving the worst was 20μm. This was determined by SEM observa tion. It was suggested that the use of a granule size over 20μm would make it difficult to reproduce a 20μm wide line. Comparing the stone surfaces made from either Coltex or hydrocolloid impression material, the surface made from the hydrocolloid impression material revealed larger growing crystal granules which may be due to the surface roughness or hardness of the impression.(5) Stones whose surface character may be affected by hydrocolloid impression material were Densite, Silkyrock, Velmix, Surstone, Tewe and Rapid stones, while those not easily affected were Mode-rock, Fuji-rock, Sunrock and New metal rock as well as New plastone and Hydro-gips. Clinically, the latter group seem to have less surface roughness.

著者

鈴木 哲也 熊谷 宏 内田 達郎 吉富 信幸 渡邊 竜登美 石鍋 聡 水口 俊介 関田 俊明 平野 滋三 宮下 健吾 小林 賢一 長尾 正憲

出版者

社団法人 日本補綴歯科学会

雑誌

日本補綴歯科学会雑誌 (ISSN:03895386)

巻号頁・発行日

vol.38, no.2, pp.476-484, 1994-04-01 (Released:2010-08-10)

参考文献数

40

被引用文献数

2 4

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The distribution of occlusal support of 366 aged patients of over 70 years was surveyed and analyzed in this study. Their masticatory abilities were also evaluated by the questionnaire on the masticatory aspects of 20 kinds of foods, and their maximum occlusal forces were measured with the pressure sensitive foil. The relations among masticatory ability, maximum occlusal forces and the distribution of occlusal support were analyzed.The results were as follows.1. 52.8% of the upper and lower dentulous patients had less than 5 occlusal tooth contacts.2. Posterior tooth contacts were less than anterior ones, and even in posterior areas, occlusal contacts tended to be less from the second molar to the first premolar.3. 61.2% of the upper and lower dentulous patients had no occlusal support or only unilateral occlusal support. It is evident that occlusal support is extremely ill-conditioned in elderly patients.4. It was found that if the aged have more occlusal tooth contacts and wider occlusal support areas, they would show better masticatory ability and greater maximum occlusal forces.5. In thier initial visits to our clinic they had poor occlusal support with their dentures.6. It is suggested that occlusal tooth contacts and occlusal support areas should be important for maintaining a healthy oral function in elderly people.

著者

寺岡 文雄 北原 一慶 多田 広宣 中川 正史 高橋 純造

出版者

社団法人 日本補綴歯科学会

雑誌

日本補綴歯科学会雑誌 (ISSN:03895386)

巻号頁・発行日

vol.39, no.2, pp.274-279, 1995-04-01 (Released:2010-08-10)

参考文献数

12

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Dimensional changes of complete dentures, which were constructed by six conventional polymerization methods, were investigated after polymerization and during storage. The discrepancy at median line and alveolar ridge was larger in the dentures constructed in a water bath at 70°C for 40 min and then at 100°C for 30 min, in a hot press and by microwave polymerization than in a water bath at 70°C for 24 hrs, for 8 hrs and by autopolymerization. The discrepancy at the denture border of the dentures constructed by autopolymerization during storage in water for 30 days was 0.174±0.048 mm and in the case of the dentures constructed by other polymerization methods was less than 0.1 mm. Since the dimensional changes of the dentures during storage in water occurred up to 7 days, it seems reasonable that wearing dentures or occlusional adjustment should be carried out after storage in water for more than 7 days. The discrepancy was 3 to 4 times in the dentures stored in air than in water. When the dentures which were stored in air for 30 days was immersed in water for 30 days, the discrepancy at the denture border of the dentures constructed by autopolymerization was restored to 0.214±0.097 mm, but in the case of other polymerization methods, it was restored to about 0.14 mm.

著者

鍋島 竜將

出版者

社団法人 日本補綴歯科学会

雑誌

日本補綴歯科学会雑誌 (ISSN:03895386)

巻号頁・発行日

vol.39, no.1, pp.135-145, 1995-02-01 (Released:2010-08-10)

参考文献数

57

被引用文献数

2

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The influence of the occlusal vertical dimension on the muscle fiber conduction velocity (MFCV) and muscle fatigue was studied in the human temporal and masseter muscle in six healthy subjects (22-30years old). Occlusal vertical dimension was changed from the intercuspal position (ICP) to the maximum bite-raising position (21.0mm) by applying three different occlusal splints along the habitual opening-closing movement path. Muscle fatigue was developed until the subject stopped contracting the muscle at each occlusal vertical dimension. The EMG responses were evoked by electrical stimulation of the skin at the mandibular notch. The EMG signals were detected using a surface linear electrode array having seven contacts placed on the muscle fibers. The MFCV was calculated from the time delay between adjacent EMG signals.The results were as follows:1. The MFCV was increased with increment of the contraction level but decreased with increment of the occlusal vertical dimension.2. The MFCV was decreased with muscle fatigue at each occlusal vertical dimension.3. The endurance time was decreased with increment of the occlusal vertical dimension. The results indicate that occlusal vertical dimension is an important parameter for the propagation velocity of action potentials and for the development of static muscle fatigue.

著者

川原 春幸 竹田 正司 富井 茂三 押鐘 功 友田 亮生 渡辺 清 太田 文正 渡辺 博士

出版者

社団法人 日本補綴歯科学会

雑誌

日本補綴歯科学会雑誌 (ISSN:03895386)

巻号頁・発行日

vol.4, no.2, pp.162-168, 1960-11-10 (Released:2010-08-10)

参考文献数

10

被引用文献数

1 1 3

著者

Satoru Ozono Tadahiro Fujita Masato Matsuo Kazuo Todoki Takatsune Ohtomo Hideyuki Negishi Toshio Kawase

出版者

Japan Prosthodontic Society

雑誌

日本補綴歯科学会雑誌 (ISSN:03895386)

巻号頁・発行日

vol.52, no.3, pp.366-374, 2008-07-10 (Released:2008-10-10)

参考文献数

36

被引用文献数

5 6

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Purpose: Bone marrow stromal cells (BMSCs) are a promising cell source in applications for tissue engineering and regenerative medicine. Optimization and control of the growth and differentiation of cultivated cells can be achieved by the administration of growth factors and hormones in vitro. This study provided experimental information on the enhancement of the osteogenic potential of rat BMSCs in vitro and in vivo.Methods: Mineralized nodule formation of rat BMSCs in culture for 3 weeks with dexamethasone (Dex)-treated media supplemented with both basic fibroblast growth factor (bFGF) and 17β-estradiol (E2) was examined by histology. In porous β-tricalcium phosphate (β-TCP), proliferation, migration, and differentiation of BMSCs were examined by histology and transmission electron microscopy. After culturing, the composites were subcutaneously implanted into syngeneic rats. The tissues with implants were harvested after 4 weeks and evaluated microscopically by using histological stain.Results: Dex-treated media supplemented with both bFGF and E2 was the most effective in mineralized nodule formation of BMSCs in vitro. Light and electron microscopy revealed the presence of many cells with developed rough endoplasmic reticulum. Bone formation in the BMSC/β-TCP composites in cultures in vitro for 3 weeks was observed histologically at 4 weeks after implantation. When BMSC/β-TCP composites were cultured in Dex-treated media supplemented with both bFGF and E2, the amount of bone formation at implants was substantially greater than that of composites cultured in Dex-treated media supplemented with bFGF.Conclusion: The combined use of bFGF and E2 could effectively improve the bone-forming ability of BMSCs.

著者

柳澤 定勝

出版者

社団法人 日本補綴歯科学会

雑誌

日本補綴歯科学会雑誌 (ISSN:03895386)

巻号頁・発行日

vol.31, no.6, pp.1335-1342, 1987-12-01 (Released:2010-08-10)

参考文献数

26

著者

鈴木 章

出版者

社団法人 日本補綴歯科学会

雑誌

日本補綴歯科学会雑誌 (ISSN:03895386)

巻号頁・発行日

vol.49, no.1, pp.105-108, 2005-02-10 (Released:2010-08-10)

参考文献数

2

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症例の概要: 本症例は咀嚼・審美障害を主訴とする51歳男性に対して, 支台歯への負担軽減, 清掃性の向上, 審美性などの点から, コーヌス義歯治療を選択した. しかし, 食事が味気ない, 温度感覚がないなどの口腔機能感覚のさらなる改善を求められたため, 上顎臼歯部にインプラント補綴治療を行った. 前歯部についてはコーヌス義歯の内外冠を利用した可撤性ブリッジに改良した.考察: 本症例を通じて, 患者の要望に応じた適切な治療計画を選択することの難しさが痛感された.結論: 治療計画を変更したことにより, 口腔内不快感は消失し患者のQOLは改善された. 定期的にメインテナンスを行い装着後3年経過するが, 良好に推移しており患者も大変満足している.

著者

赤川 安正 橋本 正毅 近藤 倫明 松本 仁門 盛植 泰照 玉川 博 佐藤 隆志 津留 宏道

出版者

社団法人 日本補綴歯科学会

雑誌

日本補綴歯科学会雑誌 (ISSN:03895386)

巻号頁・発行日

vol.28, no.5, pp.810-815, 1984-10-01 (Released:2010-08-10)

参考文献数

18

被引用文献数

1 1

著者

片山 隆 宅間 雅彦 森本 清 中村 征四郎 高島 史男 丸山 剛郎

出版者

社団法人 日本補綴歯科学会

雑誌

日本補綴歯科学会雑誌 (ISSN:03895386)

巻号頁・発行日

vol.34, no.1, pp.191-196, 1990-02-01 (Released:2010-08-10)

参考文献数

10

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In order to evaluate the effect of titanium diameter on reinforcement of titaniumhydroxyapatite implant and calculate the diameter of the implant under loading, stress analysis was performed using the finite element method. In finite element model, 100% or 70% of root length was supported by PMMA in place of bone and the implant was loaded 15 kgf at 45° of the implant axis.The results were obtained as follows, 1. In the case of 100% support, the titanium diameter had little effect on the reinforcement of the implant, whereas in the case of 70% support, it had much effect.2. The diameter of this implant was calculated to be more than 3.7mm under loading.From these results and the view point of manufacturing techniques, the diameter of this implant was supposed to need 4.0mm and that of titanium was to be 2.0mm.

著者

村井 健二 竹下 文隆 今給黎 一孝 末次 恒夫

出版者

社団法人 日本補綴歯科学会

雑誌

日本補綴歯科学会雑誌 (ISSN:03895386)

巻号頁・発行日

vol.37, no.4, pp.858-872, 1993-08-01 (Released:2010-08-10)

参考文献数

32

被引用文献数

4 3

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The difference in the tissue reaction in the tissue-titanium interface between mature (22-week-old) and young (6-week-old) rats was examined by using light microscopy with decalcifiedsemi-thin sections (1μm) and undecalcified sections (40μm) and scanning electron microscopy (SEM). A titanium implant (diameter=1.0mm: height=1.5mm) was inserted into a tibia.Rats in both groups were killed on the 1st, 3rd, 5th, 7th, 14th and 28th day after operation. The bonycontact ratio and area and thickness of the newly formed bones in the undecalcified section weremeasured with an image analysis system.On the 5th day, calcification in newly formed tissue was observed in young rats, and on the 7thday, in mature rats. On the 7th day, the mass of bone-like tissue in the mature rats was smaller thanthat in young rats. On the 28th day, the implant in both rats was almost enclosed circumferentiallywith newly-formed bone (thickness=20-30μm). However, by the image analysis, the bonycontact ratio and the area of newly formed bone in the mature rats were significantly smaller thanthose in the young rats. SEM revealed collagenous fibril-like structures (thickness=2-5μm) inthe bone-titanium interface of the mature rats, but obscure structures (thickness=0.4-0.6μm) inthat of the young rats.

著者

新田 茂夫

出版者

社団法人 日本補綴歯科学会

雑誌

日本補綴歯科学会雑誌 (ISSN:03895386)

巻号頁・発行日

vol.42, no.5, pp.768-778, 1998-10-10 (Released:2010-08-10)

参考文献数

31

被引用文献数

1 1

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Polyelectrolyte complex (PEC) is produced as a result of mixting polycations and polyanions. Since PEC has strong bio-compatibility, attention has been paid to its applications such as to prostheses for sites of tissue defect. In this study, PEC coating was applied to implants with the aim of reducing the period required for achievement of osseointegration of the implant and bone and increasing contact area. Thus post-implantation tissue reactions were investigated. As a result, the PEC-coated Titanium (Ti) and Hydroxyapatite (HA)-coated implant required shorter periods for achievement of osseointegration than the non-PEC-coated implant used as the control, the width of the bone trabeculae formed was increased, and the bone contact ratio was accelerated. These results suggested that PEC is a useful biological material for reducing the period required for achievement of osseointegration of the implant and bone and for increasing the contact area.

著者

竹下 文隆 鮎川 保則 伊山 慎二 曽根 寛之 末次 恒夫

出版者

社団法人 日本補綴歯科学会

雑誌

日本補綴歯科学会雑誌 (ISSN:03895386)

巻号頁・発行日

vol.41, no.2, pp.188-194, 1997-04-01 (Released:2010-08-10)

参考文献数

18

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The purpose of this study was to investigate the tissue reaction to three kinds of membranes, Gore-Tex Augmentation Material (GTAM), Vicryl, and Dura Mater, placed on bone defects around the titanium implants. Nine adult dogs weighing 15kg were used in this study. The dogs were sacrificed either 2, 4, or 12 weeks after placement. Vicryl was exposed 2 weeks after placement. Histologically, it was found that Vicryl was completely resorbed, Dura Mater was replaced with connective tissue at 12 weeks, and bone defects using GTAM and Dura Mater but not Vicryl were partially filled with newly-formed bone tissue. Active bone formation was observed in the space between membranes and pre-existing bone tissue.

著者

猪子 芳美 高橋 史 大沼 智之 森田 修己

出版者

社団法人 日本補綴歯科学会

雑誌

日本補綴歯科学会雑誌 (ISSN:03895386)

巻号頁・発行日

vol.47, no.3, pp.508-515, 2003-06-10 (Released:2010-08-10)

参考文献数

16

被引用文献数

1

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目的: 閉塞型睡眠時無呼吸症候群の歯科的治療に用いられる口腔内装置 (Oral appliance: OA) の効果に関する報告は, 多く認められる. しかし, 下顎前方位型装置 (Mandibular advancement device: MAD) の装着が口腔咽頭領域の形態に及ぼす影響について, 画像的に十分明らかにされていない. 本研究の目的は, 側方頭部X線規格写真 (セファログラム) 撮影時の体位および呼吸変化が, 口腔咽頭領域の形態に及ぼす影響を健常者について検討することである.方法: 被験者は, 自覚的, 他覚的にいびきを認めない健常者12名 (男性10名, 女性2名, 平均年齢27.3歳, 肥満度21.9kg/m2) とした. 被験条件は, 立位時の吸息と呼息および仰臥位時での吸息と呼息において, セファログラム撮影を行った. 撮影されたX線写真から得られた透写図上にて, 咽頭腔前後径とその面積, ならびに舌骨の位置の計測を行い, 体位と呼吸状態を2要因とする反復測定分散分析を用いて検討した.結果: 吸息時と呼息時の間に有意な差は認められなかった. しかし, 体位を立位から仰臥位に変化させると, 咽頭腔面積および口蓋垂後方の前後径と舌根部後方の前後径, 舌骨から下顎までの距離が有意に減少した.結論: 以上の結果から, 呼吸による影響は認められなかったが, 体位を立位から仰臥位に変化させることで口腔咽頭領域の形態に影響を及ぼすことが示された.

著者

竹内 聡史 河野 正司 小林 博 桜井 直樹 細貝 暁子 金城 篤史 甲斐 朝子

出版者

社団法人 日本補綴歯科学会

雑誌

日本補綴歯科学会雑誌 (ISSN:03895386)

巻号頁・発行日

vol.52, no.4, pp.473-481, 2008-10-10 (Released:2009-02-20)

参考文献数

17

被引用文献数

1 1

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目的 : 下顎タッピング運動に随伴する体幹動揺が, 座位において観察できるのか, また立位と座位でどのような差を示すか追求することを目的とした.方法 : 被験者は顎口腔系に異常を認めない男性6名 (25-29歳, 平均年齢27.0歳) で, 姿勢は立位, 座位の2種類として, 10秒間の咬頭嵌合位保持, 3Hzの20秒間タッピング, その後10秒間咬頭嵌合位保持を1測定単位として測定を行った. 下顎運動はTRIMETII (東京歯材社製) により上顎座標系にて下顎切歯点を, 頭部は大地座標系で上顎切歯点, 下顎頭点, 頭頂点, 後頭点を, また体幹動揺はProreflex (Qualisys社製) により大地座標系で胸骨点の矢状面内運動を分析した.結果 : 座位において, 下顎タッピング運動に随伴する体幹動揺が認められた. 開口量に対する体幹動揺量を立位と座位でWilcoxonの符号付検定をしたところ, 有意に立位の方が大きくなった. また体幹動揺の周波数分析におけるパワーの平均値を立位と座位でWilcoxonの符号付検定をしたところ, 有意に立位の方が大きくなった. しかし, 原波形解析による検出率をWilcoxonの符号付検定をしたところ, 立位と座位で有意差は認められなかった.結論 : 体幹動揺量は立位の方が大きいが, 原波形による検出率では差がなく, 咀嚼動作として自然な座位での分析も可能であることが明らかとなった.

著者

牧平 清超 二川 浩樹 西村 春樹 西村 正宏 村田 比呂司 貞森 紳丞 石田 和寛 山城 啓文 金 辰 江草 宏 福島 整 浜田 泰三

出版者

社団法人 日本補綴歯科学会

雑誌

日本補綴歯科学会雑誌 (ISSN:03895386)

巻号頁・発行日

vol.45, no.3, pp.403-411, 2001-06-10 (Released:2010-08-10)

参考文献数

22

被引用文献数

4 4

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目的: 本研究は, 市販義歯安定剤の細胞活性への影響および炎症性サイトカインであるインターロイキン1βの発現誘導に及ぼす影響を検討した.方法: 細胞活性への影響はaqueous soluble tetrazolium/formazan assay (MTS法) を用いて, またインターロイキン1βの発現誘導はEnzyme-linked immunosorbent assay (EUSA法) を用いて評価した.結果: クリームタイプを中心とした義歯安定剤は, 強い細胞活性の減少を示した. 特に新ポリグリップ無添加が最も低い細胞生存率を示した. 一方, ポリデントを除くクッションタイプでは, 細胞活性に対する影響をほとんど認めなかった. 粉末タイプおよびシールタイプでは, これらの中間の作用を示した. これらの細胞に対する作用は, pHの影響ではなくむしろ義歯安定剤の成分に大きく依存していることが示唆された.また, 細胞活性に影響を与えない6製品でインターロイキン1βの発現を検討した結果, すべての製品で誘導を示さなかった. しかしながら, 歯科で使用される材料由来の環境ホルモンによる人体への影響が懸念されているなか, 今後さらに分子レベルにまで踏み込んだ検討が必要と思われる.結論: 義歯安定剤にはこれまで報告されている機能面での為害性や細胞生物学的な為害性も有している製品もあることから, その使用にあたって歯科医師の十分な管理が必要と考えられる.

著者

田端 恒雄

出版者

社団法人 日本補綴歯科学会

雑誌

日本補綴歯科学会雑誌 (ISSN:03895386)

巻号頁・発行日

vol.36, no.3, pp.461-470, 1992-06-01 (Released:2010-08-10)

参考文献数

23