著者
河野 正司 吉田 恵一 小林 博 三浦 宏之
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.3, pp.764-769, 1987-06-01 (Released:2010-08-10)
参考文献数
12
被引用文献数
7 3

Many TMJ patients who have occlusal interferences often complain of pains in the sternocleidomastoid muscle. The pain occurs mainly in the insertion of the muscle (SCM-I) rather than in the middle of the muscle (SCM-M). In order to investigate a causative mechanism of pain in the sternocleidomastoid muscle in relation to occlusion, the activities of sternocleidomastoid and masticatory muscles were studied by means of EMG during functions in relation to the occlusal contact on six normal subjects. EMG activities of temporal, masseter, SCM-I and SCM-M were recorded by surface and needle electrodes.EMG activity was recorded from SCM-I in accordance with the activity of the masticatory muscles during tapping, clenching, and mastication. On the other hand little activity was registered from SCM-M. The amplitude of the EMG of SCM-I increased as the occlusal force increased. During chewing the sternocleidomastoid muscle was functioning more actively on the working side than on the non-working side.
著者
石田 鉄光
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.5, pp.939-947, 1995-10-01 (Released:2010-08-10)
参考文献数
25
被引用文献数
1

At present, immersion in anantiseptic solution is the most common method of sterilizing an impression. However, it is known that immersion in an antiseptic solution would have adverse effects on the accuracy and surface property of the impression. Thus it has been demanded that a sterilization method having no adverse effects on impressions be devised. In this study, the effects of impression materials on ultraviolet irradiation and those of ultraviolet irradiation on impressionswere evaluated using ultraviolet rays ith a wave length of 253.7 nm.The results were as follows:1. Irradiation at 7, 000μW/cm2 showed a more stable sterilization ffect than that at 1, 000 μ/W/cm2.2. In ultraviolet irradiation at 1, 000μW/cm2 for 30 seconds, viable cells of the indicator strain were significantly less on the silicone ubber impression than on the alginate impression (p<0.01).3. In ultraviolet irradiation at 7, 000μW/cm2 for 5, 10, 15 and 20 seconds, viable cells of the indicator strain were significantly less on the silicone rubber impression than on the alginate impression (p<0.01).4. On observation of the impression surface after ultraviolet irradiation under scanning electron microscopy, the number of cells of the indicator strain were found to have decreased.
著者
山本 鉄雄 小林 文隆
出版者
社団法人日本補綴歯科学会
雑誌
日本補綴歯科學會雜誌 (ISSN:03895386)
巻号頁・発行日
vol.39, no.4, pp.696-703, 1995-08-01
被引用文献数
16

マウスプロテクターはボクシング,アメリカンフットボール,アイスホッケーなど様々なスポーツの選手に装着されている.その目的とするところは,選手どうしの衝突などによって引き起こされる偶発症の予防あるいは軽減にあるが,もう1つ,筋力の向上を目指すことがある.しかし,この点に関する見解は,マウスプロテクターが有効であるとするものと,そうでないとするものがあり一定しない.本研究ではこの点を明らかにするため,安定した筋力を発揮できる被験者を選別し,マウスプロテクター装着前後の筋力を測定した.その結果,上肢より下肢の筋肉で効果がでやすいなど興味深い知見が得られている.
著者
吉田 圭一 舟木 和紀 棚川 美佳 松村 英雄 田中 卓男 熱田 充
出版者
社団法人日本補綴歯科学会
雑誌
日本補綴歯科學會雜誌 (ISSN:03895386)
巻号頁・発行日
vol.39, no.1, pp.35-40, 1995-02-01
被引用文献数
32 13

歯冠修復の最終補綴処置として使用する合着用セメントは,100年以上にわたってリン酸亜鉛セメントが王座を占めてきた.その後,カルボキシレートセメントとグラスアイオノマーセメントが相次いで開発され,さらに歯質や金属と接着性を有するレジンセメントが登場して,接着ブリッジ以外にもキャスタプルセラミックスクラウンやラミネートベニアなどのポーセレンとの接着にも利用され,それらの用途が急速に広がりつつある.そこで本論文は,従来の合着用セメントとレジンセメントの機械的性質と吸水・溶解量,金銀パラジウム合金に対する接着強さを測定し,材料学的見地からこれらのセメントを比較検討したものである.
著者
玉置 幸道 宮崎 隆
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.4, pp.528-539, 1998-08-10 (Released:2010-08-10)
参考文献数
91
被引用文献数
4 4

Although titanium has been a popular metal in dentistry, it was not actively applied in the clinic. Some of the reason were most importantly a hardened layer formed on the casting surface with a reaction between mold material and molten titanium that had different physical and chemical properties than titanium. Moreover, fit of prostheses is lost due to the removal of the reacted layer. On the other hand, internal defects are often observed by X-ray photography of titanium castings. Bubble-like defects formed by gas inclusion will lead to worse durability.In order to obtain sound titanium castings, it is important to maintain surface transcription with high quality during the casting procedure and decrease casting error. A new investment may be a key to success. A development of titanium alloy seemed to be effective as prosthetic materials.
著者
井上 昌幸
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.6, pp.1127-1138, 1993-12-01 (Released:2010-08-10)
参考文献数
32
被引用文献数
11 8

Sensitization and allergic lesions resulting from metals in our living environment have often been reported. However, dentists have paid little attention so far on sensitization or dermal or mucosal lesions caused by metal restorations. We have established a team of 14 research institutions to perform patch tests with 18 kinds of dental metals and to conduct and epidemiological survey on the patch test positive subjects.Prior to the study, application of the testing solutions and reading of the skin reactions were standardized. Patch tests were done on volunteers and patients with the total of 1, 728 subjects. On those patients who showed positive reactions to the patch tests, metal analysis for the intraoral restorations was done by the method developed by Inoue et al. The analysis results were then compared to the patch test results to investigate the relation between the two.The following data was collected and discussions were made:(1) patch test posit ive/negative rates for the total subjects, (2) their differences regarding sex, age, or a kind of metal, (3) regional dfference, (4) relation between an individual with patch test positive result and his/her intraoral metal restoration (s), (5) types and locations of the lesions, (6) patch test positive rate (overall and of the each metal) for the patient group, (7) difference in the patch test positive rate between the volunteer group and the patient group, (8) comparison between the patch test positive rates among the M-9, M-11 or M-13 series, and among the different concentrations of the testing solutions, (9) comparison of the results between patch tests and their confirmation tests, (10) changes in the patch test reaction during the testing period.From these results, it is considered that careful and adequate measures against the metal allergy should be taken, when the dentist starts the prosthodontic treatment.
著者
河相 安彦 矢崎 貴啓 松丸 悠一 先崎 孝三郎 浅井 秀明 今道 康夫 伊藤 允人 杉村 華織 竹尾 藍 朱 一慶 伊澤 武志 大野 洋介 山本 史朗 小平 真倫亜 宗 邦雄 島 由樹 林 幸男 桑原 克久 小林 喜平
出版者
Japan Prosthodontic Society
雑誌
日本補綴歯科學會雜誌 = The journal of the Japan Prosthodontic Society (ISSN:03895386)
巻号頁・発行日
vol.51, no.3, pp.572-581, 2007-07-10
被引用文献数
3 7

目的: 本研究の目的は総義歯学の授業で講義型学習 (以下LBL) と問題解決型学習 (以下PBL) 双方を経験した学生の自己学習および臨床推理能力に関する教育効果と授業・教員に対する評価の両教育形式間での比較検討である.<BR>方法: 総義歯学の授業を平成15年度入学の学生に, 平成17年度3年次前期にLBL, 平成18年度4年次前期にPBLにて行った. PBLは5回にわたり, 毎回1症例についてグループディスカッションを行い, グループによるまとめを2回, 個人レポートを2回および全体発表を1回という予定で進行した. 全体発表終了後, 教育効果および授業・教員に関する27項目のアンケートを行った.因子分析により質問項目の類型を行い, 各質問項目についてLBLおよびPBLの比較を行った (Paired-t).<BR>結果: 因子分析より質問項目は4因子に類型された. LBLとPBLとの間で「学習態度」について7項目中4項目, 「臨床推理能力」について全項目, 「授業内容」について7項目中5項目, 「教員評価・そのほか」について6項目中2項目, 合計27項目中18項目 (66.6%) でPBLが有意に高い値を示した.<BR>結論: PBLはLBLに比べ自己学習および臨床推理能力の教育効果の向上に極めて有効で, 授業に関する評価も有意に高かった. 一方, 同様の授業を受けることに学生は後向きで, 消極性解消法の検討が必要であると示唆された.
著者
沖山 誠司 吉田 実 山本 誠 森井 まどか 野首 孝祠
出版者
社団法人日本補綴歯科学会
雑誌
日本補綴歯科學會雜誌 (ISSN:03895386)
巻号頁・発行日
vol.40, no.4, pp.710-717, 1996-08-01
参考文献数
22
被引用文献数
27 5

当講座では,形状と物性が規定された試験用グミゼリーを開発し,義歯装着者の咀咽能率の評価に用いている.一方,咀咽能力が義歯装着者より一般的に優れている有歯顎者に対しては,より硬さの増したグミゼリーを用いた咀咽能率の評価が必要と考えられる.本論文では,硬さの異なる試験用グミゼリーを用い,硬さの違いおよび被験者の咬合接触状態が,咀咽能率診査結果に及ぼす影響について検討し,本診査法が被験者や目的に応じて広く応用できることが示された.今後,この種々の硬さのグミゼリーを用いた咀瞑能率診査法により,被験者の食品咬断能力,補綴治療にょる咀喉機能の回復度の詳細な評価が可能になるものと期待される.
著者
宮田 敏則
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.3, pp.631-645, 1990-06-01 (Released:2010-08-10)
参考文献数
62
被引用文献数
7 5

The purpose of this study is to reveal the relation between stomatognathic system and the systemic condition.In the present study, experimental occlusal interference was given to the first molar on main mastication side of 6 healthy subjects and the influence on the upright posture was evaluated through simultaneous measurements of changes in activity of antigravity muscles via electromyography, other than the measurement of loci of the gravity fluctuation for stabilograph before and after the interference was provided.The following results were obtained, 1. Loci of gravity fluctuation1) All parameters tended increase 24 hours after the interference was provided.2) The decreasing trend was noted 24 hours after the interference was removed.3) At one week after the interference was removed all analysis items tended to restore to the normal range.2. Activity of antigravity muscles In some of the subjects, the muscular activity showed the same trend as the changes of analysis items of gravity fluctuation.3. The above results suggest that the evaluation of the loci of the gravity fluctuation may be helpful to assess the therapeutic effect of malocclusion.
著者
小林 義典 松本 敏彦 石上 惠一 平井 敏博
出版者
社団法人日本補綴歯科学会
雑誌
日本補綴歯科學會雜誌 = The journal of the Japan Prosthodontic Society (ISSN:03895386)
巻号頁・発行日
vol.40, no.1, pp.1-23, 1996-02-01
参考文献数
139
被引用文献数
60 9

咬合と全身の機能との関係について,過去5年間に本学会学術大会および本誌で報告された内容のうち,特に咬合間題が聴能力,重心動揺,眼振図,聴性脳幹反応,咀咽系の機能,自律神経系の機能,情動,睡眠に及ぼす影響,ならびに咬合接触が身体運動機能に及ぼす影響を分析したデータを考察し,解説を加えた.その結果,咬合問題は,中耳伝音系機能,平衡感覚,聴性脳幹反応,自律神経系の機能,情動,睡眠に影響を及ぼし,また咬合機能は,身体運動機能に密接に関連することが検証された.
著者
小林 義典 松本 敏彦 石上 恵一 平井 敏博
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.40, no.1, pp.1-23, 1996-02-01 (Released:2010-08-10)
参考文献数
139
被引用文献数
12 9

In order to verify the relation between the body function and occlusion, the gravity function, electronystagmography, and auditory brainstem response of TMD patients, edentulous patients and healthy subjects with 500 μm thick experimental occlusal interference were analyzed, and it was confirmed that occlusal problems impede the auditory system, body's posture adjusting system and vestibule system. Further, when the relation between the occlusal contact and the bodily motor function were compared between healthy subjects and patients whose occlusion had been treated, it was confirmed that there was close relation between the two.Furthermore, from the analysis of human body phenomena of healthy subjects with 100 μm thick experimental occlusal interference, it was confirmed that occlusal problems induced bruxism or continuously aggravated the problem and eventually entailed TMD, as well as changed the function of the autonomic nervous system and provoked emotional stress and sleep disorders.From these results, it was verified that occlusal problems affected the function of the middle ear transmission system, equilibrium sense, auditory brainstem response, function of autonomic nervous system, emotion and sleep and that the occlusal function was closely related to the bodily motor function.
著者
大野 純一
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.5, pp.736-744, 2003-12-10 (Released:2010-08-10)
参考文献数
23

欧州を中心に発展してきた, いわゆる短縮歯列を治療のゴールとする考え方 (Shortened dental arch concept) に関し, 患者を用いた臨床研究の文献考察を行った.研究対象となった短縮歯列患者の多くは機能的, 審美的に満足のいくもので, 経年的な研究でもその咬合状態は安定しており, 治療のゴールの1つの選択肢となり得るものであった.しかし, これまでの研究は特定の患者群 (大学病院への来院患者) における, ある一定のパターンの歯列が対象であるため, 今後より大きなサンプルを扱った, 多施設共同臨床研究での長期にわたる研究が待たれる.
著者
池邉 一典 喜多 誠一 難波 秀和 清水 裕子 谷岡 望 吉備 政仁 小野 高裕 野首 孝祠
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.44, no.2, pp.332-338, 2000-04-10 (Released:2010-08-10)
参考文献数
30
被引用文献数
2 1

The purpose of this study was to analyze the relationship between quality of removable dentures and nutrient intake in the elderly. Subjects were 323 community dwelling, independently living elderlypeople (174 males and 149 females) aged 60-79, of which the mean age was 66.3±4.3 years.Diet was assessed by licensed dietitians via interview for 3 days. The data on food consumption were converted to the nutrient content such as energy (kcal), protein, and calcium. The ratio of actual nutrient intake per recommended nutrient intake was evaluated as a measure of dietary adequacy. Student's t-test, Mann-Whitney U-test, and one-way ANOVA were used for statistical analysis.The nutrient intake, except iron, was sufficient in both dentate and denture wearer groups. Among removable denture wearers, nutrient intake tended to be lower in the low occlusal force group than in the high group. There were significant differences in protein and iron intake in males between the two groups (p<0.05), and the nutrient intake also tended to be lower in the group dissatisfied with removable denture than in the group satisfied therewith.The results indicated that both occlusal force and satisfaction with removable dentures were associated with nutrient intake of elderly people.
著者
山田 欣伯
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.46, no.4, pp.511-520, 2002-08-10 (Released:2010-08-10)
参考文献数
32

目的: 失活歯の多くは, 支台築造が行われ全部被覆冠で修復される. しかし, 長期的な経過は常によい結果を示しているわけでなく, しばしば脱落や歯根破折のような臨床的なトラブルにみまわれる. 本研究の目的は, 失活臼歯に対する部分被覆での修復の可能性を明らかにすることである.方法: 一定の基準で選択した140本のヒト抜去小臼歯を用い, 各10試料の14条件とした. 2種類のMOD窩洞を形成し, 種々の方法で修復した. すなわち, 条件1は無形成歯, 条件2~4, 10は窩洞形成のみ, 条件5, 6, 11は光重合型コンポジットレジンによる修復, 条件7, 8, 12は鋳造インレーによる修復, 条件9, 13, 14は, 鋳造アンレーによる修復である. 各試料に対し荷重試験を行い, 破折強度および破折様相を求め, 相互に比較した.結果: すべての条件のなかで, 接着性レジンセメントで合着した鋳造アンレーが最も高い破折強度を示した. ただし, 破折様相は再修復が困難であった. 次に高い強度を示したのは鋳造インレーであった. コンポジットレジン修復は, 有意に低い破折強度を示したが, 破折様相は容易に再修復できるものだった.結論: 鋳造アンレーによる修復の破折強度は, 無形成歯よりも高い値を示し, 失活臼歯を部分被覆タイプの修復物で修復が可能であることが示された. また, コンポジットレジン修復におけるボンディング剤や鋳造修復における接着性レジンセメントの有効性が示された.
著者
横山 雄一
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.1, pp.90-101, 1998-02-01 (Released:2010-08-10)
参考文献数
50
被引用文献数
5 9 1

Involuntary clenching is common during physical exercise; therefore, the purposeof this study was to elucidate the relationship between stomatognathic function and physical exercise as well as role and mechanism of involuntary teeth clenching during physical exercise.In 15 healthy, fully dentate males (mean age 26.5±2.1), electromyographic activities from jaw closing (JM), sternocleidomastoid, biceps brachial (BB), and rectus femoral (RF) muscles; mandibular positions; and muscle strength during both isometric elbow flexion and knee extensionexercises were recorded and analyzed.From the analysis of electromyographic activities and mandibular position, the subjects were divided into two groups, Clenching group (n=9) and Non-clenching group (n=6). The subjects in the Clenching group showed involuntary clenching during the exercise and their mandibular positions were located at the inter-cuspal position. The onset of electromyographic activity of JM was earlier than that of the agonist (BB, RF) in the 7 subjectsof the Clenching group. In the Clenching group, both elbow flexion and knee extension strength with involuntary clenching were lowered when voluntary mouth opening was directed during the exercise.These results suggested that stomatognathic function and physical exercise had an interdependent relationship and involuntary clenching during physical exercise could be explained by a so-called feedforward mechanism.
著者
松下 恭之 佐々木 健一 郡 英寛 江崎 大輔 春田 明日香 古谷野 潔
出版者
Japan Prosthodontic Society
雑誌
日本補綴歯科學會雜誌 = The journal of the Japan Prosthodontic Society (ISSN:03895386)
巻号頁・発行日
vol.52, no.1, pp.1-9, 2008-01-10
参考文献数
41
被引用文献数
7 1

オッセオインテグレーションインプラントは, 表面性状の改善や埋入システムの確立により, 5年程度の中期経過では100%に近い生存率も報告されている. しかし一方で長期の使用に伴い, 破折などの機械的偶発症と支持骨の吸収などの生物学的偶発症が増加することが報告されている. この原因は多様だが, インプラントに付与した咬合から生じたオーバーロードが偶発症の主な因子のひとつとして上げられている。<br>インプラントの咬合において, オーバーロードを引き起こすと考えられるリスクファクターについて疫学研究と基礎的研究のレビューを通して, 現状を整理した.<br>天然歯とインプラントが混在する場合の咬合については, 当初被圧変位量の差を考慮すべきとされたが, 現在これを積極的に肯定する研究は少なく, むしろ被圧変位量の分だけ低くした咬合を付与した場合に, 顎関節や隣在歯などへの影響を危惧する報告も散見される. 現状では, 天然歯と同様の接触を与えても臨床的な問題は少ないと考えられる.<br>側方ガイドや咬合力の側方成分, カンチレバー, 広すぎる咬合面幅によるオフセットローディングなどの非軸方向荷重については, 曲げモーメントとして作用するため, 軸方向荷重よりもその影響は強いと思われる. しかしながら生物学的に影響ありとした疫学データは見られない.<br>天然歯とインプラントの連結については, メタ解析の結果により骨吸収へのリスクが示唆されている.
著者
高山 慈子 三浦 英司 細井 紀雄 前田 伸子 渋谷 耕司 石川 正夫
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.44, no.2, pp.208-220, 2000-04-10 (Released:2010-08-10)
参考文献数
23
被引用文献数
2 1

This study was conducted to investigate the principal factors involved in the discoloration of 12 Wt% Au-Ag-Pt alloy. Luminance of cast clasps, oral conditions, the presence cariogenic microbes such as Streptococcus mutans and Lactobacillus in saliva, Candida on the tongue and the amount of volatile sulfur compounds (VSC: H2S and CH3SH) produced by the tongue coating were evaluated in 70 subjects (VSC: 45 subjects). The surfaces of cast clasps were observed using an electron probe X-ray microanalyzer and changes in the surface were evaluated in relation to the degree of discoloration.The results were as follows:1. The Mann-Whitney U-test revealed statistically significant differences (p<0.05) between the production of CH3SH and VSC (CH3SH+H2S) and luminance.2. Examinations of the cross section of markedly discolored casts revealed a very rough surface. A distinct peak of S was also indicated by linear analysis.The results demonstrated that among the many different factors such as oral conditions and oral flora, the production of CH3SH was the most significantly related to the discoloration of 12 Wt% Au-Ag-Pt alloy. The potential for discoloration tended to be higher in subjects who had a high production of CH3SH.
著者
Harukazu Kanehira Akinori Agariguchi Hisashi Kato Shigeki Yoshimine Hiroshi Inoue
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.375-380, 2008-07-10 (Released:2008-10-10)
参考文献数
49
被引用文献数
17 31

Purpose: To evaluate the causes of temporomandibular disorder (TMD) by examining the relationships between 3 major TMD symptoms, parafunction, and stress, a questionnaire survey was performed during dental examinations in corporations.Methods: The survey was performed using 6 questions on the following topics: 1. Trismus; 2. Joint noise; 3. Pain; 4. Clenching in the daytime; 5. Nocturnal bruxism; and 6. Stress.There were 3,225 subjects, 2,809 males and 416 females and the mean age of the subjects was 40.12 years. The relationships between questions 1 to 5 and question 6 were examined by the chi-square test.Results: There were significant correlations (question 1, p=0.001; questions 2-5, p<0.001).Conclusion: Clearly, there was an influence of psychological factors, such as stress, on TMD, and such factors were considered to play important roles in its etiology, progression, and treatment. The results of this study suggest that well-controlled studies of TMD are necessary.