著者

仲西 修 山室 宰 亀山 秀一郎 天野 裕治 東 真実 今井 弘貴 梅田 健一郎 椎葉 俊司 西 正勝

出版者

九州歯科学会

雑誌

九州歯科学会雑誌 (ISSN:03686833)

巻号頁・発行日

vol.48, no.4, pp.463-472, 1994-08-25 (Released:2017-12-21)

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This study was undertaken to assess the effect of different concentrations of nitrous oxide combined with a low dosage of midazolam on pain sensation in the buccal region of the human face. Twenty healthy subjects (male : 16, female : 4), male and female varying in age from 23 to 28 years (mean ; 24.9 years) and from 23 to 30 years (mean ; 25.8 years), and weighing from 52 to 85 kg (mean ; 66.1 kg) and from 46 to 49 kg (mean ; 47.1 kg) respectively, were involved in this study. All subjects were administered midazolam (0.025 mg/kg) intravenously, and divided into three groups ; the first inhaled 25% N_2O and 75% oxygen (25% N_2O group), the second inhaled 40% N_2O and 60% oxygen (40% N_2O group), and the third inhaled 60% N_2O and 40% oxygen (60% N_2O group). All subjects were reclined on dental chair comfortably in the supine position 10 minutes prior to start of the experiment. Three control tests were carried out with inhalation of room air at 10 minute intervals. One of the three concentrations of nitrous oxide (25% N_2O, 40% N_2O and 60% N_2O) was inhaled within 5 minutes by face mask after injection of midazolam into the forearm without the subject's knowledge for 30 minutes, and the mask was removed after oxygen inhalation for 5 minutes in succession after turning off the nitrous oxide gas. Three tests each for thresholds of tactile sensation using nylon^[○!R] thread (point load 0.004 g, 0.01 g, 0.2 g), and of pain sensation using an esthesiometer (point load 1-10 g) on the buccal region of the face were made at 10 minutes' intervals during N_2O inhalation and withdrawal periods. The results obtained are as follows. 1) The threshold of tactile sensation in the buccal region increased 17% and 19% over the control in the 40% N_2O group and the 60% N_2O group, respectively, but there were no significant differences between the groups. 2) The threshold of pain sensation in the buccal region showed significant increases from the control value in the 40% N_2O group during N_2O inhalation period, and the 25% N_2O group and 60% N_2O group showed significant increases from the control value at the 10 minutes point and 30 minutes point in the inhalation period, respctively. Especially in 40% N_2O group, significant increases were seen much more than in the 25% N_2O group at the 30 minutes point in the inhalation period. 3) In the condition of consciousness of 25% N_2O group and 40% N_2O group, there were significant differences during the N_2O inhalation term, and significant decreases appeared in blood pressure and heart rate during the N_2O inhalation term. These results indicate that the analgesic effect of 40% nitrous oxide combined with midazolam and the sedative effect of 25% nitrous oxide combined with midazolam are better than those of the other concentrations of nitrous oxide. It is the best way of the dental treatment to use infiltration under the 25% nitrous oxide with midazolam (0.025 mg/kg) for patient pain and fear.

著者

津村 敏克 宗 洋一郎 山本 博武

出版者

九州歯科学会

雑誌

九州歯科学会雑誌 (ISSN:03686833)

巻号頁・発行日

vol.32, no.2, pp.113-118, 1978 (Released:2017-12-22)

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The purpose of this study was to prove the relationship between gingival massage with a toothbrush and increased protection of gingiva. Fifteen clinical students with a healthy gingiva participated in this study. The maxillary left incisors, canines and labial marginal gingiva were decided as the experimental side and the right side as the control. The participants stopped their oral hygiene during the experiment, but an examiner performed gingival massage twice every day. At the gingival massage, the examined teeth were covered with a vinyl chloride plate in order not to remove the plaque. The schedule of this study was as follows : 1. Preliminary period. (20 days, scaling, brushing and flossing once every day) 2. Experiment period. (30 days ; gingiva of the experimental side was stimulated with a toothbrush twice every day) Plaque score was evaluated according to the P.I. (Loe & Silness) every fourth day and gingival condition was evaluated according to G.I. (Loe & Silness) every second day by the examiner. Also gingival exudate was scored on 0, 14th, 22nd and 30th day and gingival pocket depth was scored on 0, 14th and 30th day. During the experiment, there was no significant difference between the P.I. of the experimental and control sides, but gingival inflammation of the experimental side developed more mildly and slowly than that of the control side.

著者

山田 博 杉野 信孝 井本 廣麿 今田 吉紀

出版者

九州歯科学会

雑誌

九州歯科学会雑誌 (ISSN:03686833)

巻号頁・発行日

vol.34, no.1, pp.1-8, 1980-05-25 (Released:2017-12-22)

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我々は南米インカ人骨と思われる頭蓋骨1コ, 下顎骨5コについて調査した.その結果を要約すると次のごとくである.1. 頭蓋骨の計測結果によると, 頭長幅示数では短頭型, 頭長高示数では高頭型であった.またコルマン氏上顔示数では中上顔型, 眼窩は高眼窩型, 鼻は広鼻型, 口蓋は広口蓋型であった.2. 後頭部においてはインカ骨ならびに多くの縫合骨が認められ, 骨全般の縫合状態はきわめて緩かであった.3. 頭蓋骨に残存している6本の歯はやや大きく, 咬耗も少なく, 且つ智歯はまだ萌出していない.従って, 頭蓋骨は20才前後の若年者ではないかと思われる.4. 5コの下顎骨はいずれもがっしりした構造をしており, 特に下顎枝の発達がよく, 咀嚼筋の停止部は強い粗面を呈していた.また, 下顎切痕示数値は低い数値を示し, 切痕が浅いことが認められた.5. 歯は現代人にくらべやや大きく, 特に智歯が大きく, 退化的形態はあまり認められなかった.また歯の咬耗は, No.1, 2, 3が最も強く, いずれも40才代前後の熟年者だと考えられる.No.4は咬耗が少なく, 智歯も未萌出で, 20才前のものと考えられる.No.5は30才代以上の熟年者ではないかと思われる.

著者

寺坂 修治 岸本 一雄 西澤 浩太郎 空閑 祥浩

出版者

九州歯科学会

雑誌

九州歯科学会雑誌 (ISSN:03686833)

巻号頁・発行日

vol.56, no.1, pp.51-54, 2002-02-25 (Released:2017-12-20)

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The incidence of broken needles during dental treatment has decreased significantly since the development of disposable dental needles. Recent articles on this subject, however, have been seldom reported. The following case report serves the management of a broken needle in the pterygomandibular space. The case of a 63-year-old man was brought to our office by a dentist who reported that broke a 30-gauge needle while administering a left inferior alveolar nerve block. The dentist attempted to remove the needle but in vain. The CT and radiograph were evaluated and the location of needle was identified. Under general anesthesia vertical mucosal incision was made, blunt dissection was used and the needle was found and removed safely.

著者

増田 純一

出版者

九州歯科学会

雑誌

九州齒科學會雜誌 : Kyushu-Shika-Gakkai-zasshi (ISSN:03686833)

巻号頁・発行日

vol.38, no.4, pp.675-697, 1984-08-25

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The relationship between development and innervation in the early developmental stage of the incisor teeth of the rat was investigated in a period from 13-day fetus, initial development of tooth germ, to 10-day old, beginning of tooth eruption. The results obtained were as follows : 1. At 13-day fetus, the early configuration of trigeminal nerve ganglion was observed and endings of their nerve fibers were short. However, at 14-day fetus, development of the origin of tooth germ was observed with the thickening of epithelium. At this period, no nerve fibers reaching near the tooth germ were observed. 2. At 15-day fetus, the ending of nerve fibers were densely distributed around mesenchymal tissues which were present inside of epithelial tooth germ at cap stage. 3. At 19-day fetus, the tooth germs were in the bell stage. The nerve fibers were observed entering mesenchymal tissues of dental sac and they were rich, especially on the palatal side of maxillary incisors and lingual side of mandibular incisors. 4. At 1-day old, enamel was formed and at the same time small single nerve fibers were first recognized entering the dental pulps of mandibular incisors. On the other hand in the maxillary incisors they were observed at 3-day old. 5. Vascular and nerve canal, where nerve fibers distributed to the maxillary incisors passed through, were gradually displaced toward the incisal ridge as the development of the tooth germs progressed. As a result, the nerve bundles, distributing to the basal portion of the tooth germs and labial periodontium through the vascular and nerve canal indicated a sharp bend to the posterior and superior direction. 6. The nerve fibers in the dental pulp increased in number and amount with time, in addition, their branches increased. After 7-day old, nerve fibers, reaching the odontoblast layer, were rarely observed. 7. At 10-day old nerve fibers in the dental pulps were abundantly observed and elongated to the direction of incisal ridge up to the superior position than the intermediate one and their tips were located around the alveolar ridge ; however, no nerve fibers were observed in the superior portion of the pulp. 8. The nerve fibers in the periodontium elongated with time and were abundant, and at 10-day old they reached at the level of alveolar ridge.

著者

佐々木 正剛

出版者

九州歯科学会

雑誌

九州歯科学会雑誌 (ISSN:03686833)

巻号頁・発行日

vol.36, no.3, pp.433-467, 1982-06-25 (Released:2017-12-22)

被引用文献数

2 2

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This paper describes the study performed in July 1979 to obtain the data on the tooth size and to investigate the morphologic characteristics of the tooth crown in the Paiwan tribe of the Taiwan aborigines. Hard plaster models were taken from 220 Paiwans inhabiting in a mountain area in Heito District, Taiwan. The author has conducted a comparison study between the Paiwan and the Japanese among other races, in particular, from the physical anthropological point of view. The results were as follows. 1. The data obtained show that the tooth size of the Paiwan tribe is little different from that of Japanese, the Ami and Atayal tribes, etc. but slightly smaller than that of the Ami and Atayal tribes and rather closer to that of the Japanese except for the labio-lingual diameter of the maxillary canine that is greater than that of the Japanese. 2. The frequency of occurrence of the double shovel-shaped incisors was found in 19.2% in male and 11.3% in female in the upper central incisors with very low frequency in other incisors. These data were compared with those of the Japanese and slightly less frequency was shown in the latter. The very high frequency of occurrence of the shovel-shaped incisor was found in 94.8% in male and 95.6% in female in the upper central incisors and in 85.9% in male and 81.7% in female in the lateral incisors, which were almost equal to those in the Ami and Atayal tribes and the inhabitants of Ishigaki Island but much higher than those for the Japanese in other parts. 3. The occlusal surface groove in the upper first premolar is of the basic A-type, in many cases, whereas that in the second premolar is of the more atrophic C-type, in many cases, showing the similar characteristics to those of the other Japanese, etc. 4. The occlusal surface pattern of the lower first premolar was mostly of E-type of the occlusal surface groove at the two cusp and the second premolar was mostly of the Types-A and -B at the three cusp. This is very similar to those of the inhabitants of Tanegashima and Ishigaki Islands but slightly different from those of the Kyushu inhabitants. 5. The very low degree of atrophy of the hypocone observed in the upper first molar was almost similar to that of the Ami and Atayal tribes. However, the degree of distinct atrophy of the hypocone in the second molar was lower than that of the Japanese. The mesiodistally compressed crown type, one of the forms of atrophy in the upper molars, was not observed in the first molar but often found in the second molar, which were higher in frequency of occurrence than that of the Japanese. The frequency of occurrence of the Carabelli cusp was 6.5% which is nearly equal to that of the Japanese and the Ami and Atayal tribes. 6. As to the occlusal surface morphology of the lower molar, 44.8% of the first molar was of the dryopithecus pattern of its basic type. This rate is less than that in the Japanese and the neighboring races. Especially, this pattern was hardly seen in the Ami and Atayal tribes of the Taiwan aborigines. From this point of view, this pattern may be considered as the characteristic physical morphology of the Taiyan aborigines. Namely, in the Paiwan tribe, the occlusal surface of the lower molar showed distinct atrophy of the groove pattern and little atrophy of the cusp. 7. The frequency of occurrence of the protostylid was 9.3% in the first molar which is approximately in the middle between those of the Ami and Atayal tribes and slightly less than that of the Japanese. The 6th cusp was observed in 23.3% of the first molar and 6.0% of the second molar, which are considerably less than those of the Hawaians and Polynesians showing little difference from those of the Japanese. The 7th cusp was observed in 7.4% of the first molar showing little difference from that of the Japanese. The deflecting wrinkle was observed only in the first molar with the frequency of occurrence of 53.4%, which(View PDF for the rest of the abstract.)

著者

藤井 勝也 永松 浩 永松 有紀 小園 凱夫

出版者

九州歯科学会

雑誌

九州歯科学会雑誌 (ISSN:03686833)

巻号頁・発行日

vol.60, no.4.5, pp.112-123, 2006-12-01 (Released:2017-12-11)

参考文献数

44

被引用文献数

2

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チタンは,優れた生体適合性および耐食性を有するため,歯科用インプラントとして幅広く用いられるようになった.しかし,インプラントの上部構造をはじめ,ブリッジ,クラウン,インレーのような金属修復物にはチタン以外の合金を用いることが多い.電解液中で接触する異種合金間にはガルバニック反応に起因する電気化学的腐食が生じて電気化学的に卑な金属の腐食がさらに助長されることはよく知られている.したがって,歯科修復物を作製する際には,ガルバニック反応を避けるため,同一口腔内における異種合金の接触が起きないように設計するよう提唱されている.一方,異種合金が非接触状態で共存した場合についての腐食挙動は,まだ明らかにはなっていない.本研究においては,純チタンと異種合金が接触あるいは非接触状態で1.0%乳酸水溶液中に36週間共存した場合の電気化学的腐食について調べた.純チタンと陶材焼付用金合金の共存においては,接触,非接触に関わらず,これらの合金からの成分元素の溶出量にほとんど変化はみられなかった.共存により,金合金からのCu溶出量のわずかな増加および純チタンからのTiの溶出量の増加がみられた.金銀パラジウム合金については,Agの溶出抑制,Cuの溶出促進および純チタンからのTiの溶出促進がみられた.銀合金は単独浸漬においても,成分元素の溶出が顕著であった.純チタンと接触して共存した場合,Inの溶出促進傾向が認められたが,AgおよびTiの溶出は抑制された.それらを接触させない場合も同様の傾向を示した.純チタンとの共存により,コバルトクロム合金からのCoの溶出は促進された.接触および非接触のいずれでも,純チタンからのTiの溶出は増加する傾向にあった.本実験結果から,チタンおよび異種合金試験片を組み合わせた場合,陶材焼付用金合金を除くいずれの合金においても,非接触の状態でも接触した場合と同様に腐食が起こり得ることがわかった.チタンインプラントの設計に当たっては,口腔内に存在する金属修復物からのアレルギーあるいは毒性成分の溶出が促進されることを避けるために,口腔内の総合的な生体適合性を十分に考慮すべきであることが示唆された.

著者

河岸 重則 小川 孝雄 中村 修一 田中 敏子 安部 一紀 深井 穫博

出版者

九州歯科学会

雑誌

九州歯科学会雑誌 (ISSN:03686833)

巻号頁・発行日

vol.54, no.3, pp.258-263, 2000

参考文献数

9

被引用文献数

1

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ネパール王国テチョー村における国際保健医療協力の一環として, 1997年に村人の健康に直結する生活用水の水質調査を実施した.村では水道水不足のため, 溜め池の水や湧き水も生活用水として利用されていた.このため, 水道の水源, 水道施設, 溜め池, 湧き水などから採取した試料について, 一般細菌など健康に関わる基本的な12項目について検査を実施した.この調査で明らかになった問題点の一つは, 全ての試料で砒素が検出され, 特に湧き水と溜め池の水ではかなり高い値を示したことである.しかし, この調査では簡易測定法で実施されたため正確な砒素濃度は不明であった.そこでこの度, 原子吸光法を用いて砒素の精密測定を実施した.試料は水道施設, 溜め池, 湧き水について前回と同じ場所で採取した.砒素の精密分析は現地では不可能なため, 帰国直前に採水し, 九州歯科大学で行った.その結果簡易法と異なり, 原子吸光法ではいずれの試料にも砒素は検出されなかった.砒素の簡易測定法は, 他の測定項目に比して適用範囲が狭く, 測定は慎重に行うべきことが示唆される.いずれにせよ, この結果は村の水は砒素に関しては安全であることを示す.また, 前回検査しなかった残留塩素についても, 簡易法により測定した.水道水は一応さらし粉処理されていたが, 残留塩素は検出されなかった.これはこの水には容易に細菌が繁殖しやすい可能性がある事を示し, 早急な対策が必要である.さらに, 我々は以前フッ素洗口の実施に先立ち簡易法でフッ素の測定を行っていたが, 今回精密測定を実施した.全ての試料でフッ素濃度は0.2 mg/l以下であった.これは以前の結果を確証し, フッ素洗口の意義の根拠を与えるものである.

著者

宮崎 秀夫 花田 信弘 中山 浩太郎 十亀 輝 重岡 利幸 児島 正明 松田 修司 竹原 直道

出版者

九州歯科学会

雑誌

九州歯科学会雑誌 (ISSN:03686833)

巻号頁・発行日

vol.40, no.5, pp.1137-1142, 1986

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鹿児島県長島高校生(15∿18歳), 181名を対象に, CPITN (WHO)を用いた歯周疾患の疫学調査を行なった.その結果, 長島高校生の9割弱が歯肉出血(Code 1)以上の歯周疾患の症状を呈しており, 歯石沈着(Code 2)以上の所見が認められる者の比率でみると, 北九州の高校生より, 20% (女)∿40%(男)高かった.また, 歯周疾患の処置の必要性に関しては, 長島高校生の約90%が口腔清掃指導を必要としており, 80%以上が除石を必要としていた.しかしながら, 複雑な治療を要する者は1名もいなかった.以上の所見より, 集団歯科保健指導や管理が行なわれやすいこの時期(高校生)までに, 歯周疾患に関する徹底した指導, 教育と, スクリーニングの必要性が示唆された.

著者

冨永 和宏 土生 学 吉岡 泉

出版者

九州歯科学会

雑誌

九州歯科学会雑誌 (ISSN:03686833)

巻号頁・発行日

vol.63, no.3, pp.122-132, 2009 (Released:2010-06-15)

参考文献数

23

被引用文献数

1

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顎関節症の現在の治療概念を概説した.顎関節症はself-limiting diseaseであるので,治療の方針は可逆的で侵襲の少ないものを選ぶべきである.炎症や咀嚼筋のこりが関節痛や機能障害の原因であるため,特に初期においては投薬での消炎,鎮痛に取り組む.関節の炎症や筋のこりの背景には生活習慣を含むさまざまな寄与因子を基にする過負荷があるため,スプリントだけでなく習慣改善やリラキゼーションプログラムの教育,指導が重要である.投薬などで初期の炎症期を制御した後に開口訓練,マニプレーション,関節パンピング,関節洗浄など開口度を増加させる方法が効果的となる.顎関節は大きな適応能力を持っており,それは顎運動によって活性化する.関節の適応能力を活発にするための理学療法が顎関節症の治療に重要な役割を果たす.寄与因子,予見因子のコントロールと減少が症状減弱後も必要で,それは長期にわたって日課として続けられなければならない.難治性の患者では精神医学的な対応も検討されるべきである.クリックのみの患者や画像上の変化だけで臨床症状の乏しい患者は治療の対象にはならないが,悪習癖を持っているなら習慣改善の教育が勧められる.

著者

大木 淳

出版者

九州歯科学会

雑誌

九州歯科学会雑誌 (ISSN:03686833)

巻号頁・発行日

vol.36, no.1, pp.212-227, 1982

被引用文献数

2

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In orthodontics, mouth-breathing is cited as one of the causes of maxillary protrusion, for it is considered that the pressure balance among the lips, cheeks, tongue, and intraoral air pressures which determine the tooth position and the dental arch form changes by mouth-breathing. However, this belief has not been experimentally demonstrated sufficiently. Therefore, differences in pressures by the soft tissues between normal breathing and mouth-breathing and the effects of these differences on the dental arch form were examined. For this purpose, nine subjects with normal occlusion were measured for the following pressures during a 30-minute period of normal breathing at rest and during the same duration of experimental mouth-breathing : the lip and tongue pressures at the upper right central incisor ; the cheek and tongue pressure at the upper right second premolar ; and the intraoral air pressures at the labial side of the upper right central incisor (the labial region), at the central palate (the palatal region) and at the buccal side of the upper right second premolar (the buccal region). The results were as follow : 1. With the change in the mode of breathing, between normal and experimental mouth-breathing at rest (30-minute period), the time pressure integral of the lip pressure at the upper right central incisor decreased significantly in mouth-breathing. The oral negative pressures at the labial region and the palatal region also decreased significantly. 2. Positive correlation was recognized between the lip pressure at the upper central incisor and the negative pressure of the labial region, between the tongue pressure at the same side and the negative pressure of the palatal region and between the cheek pressure at the upper second premolar and the negative pressure of the buccal region. 3. At the upper central incisor, a relative increase in the tongue pressure as against the lip pressure was observed during mouth-breathing in eight of the nine subjects. At the upper second premolars, a relative increase in the tongue pressure as against the cheek pressure was observed in seven of the nine subjects. However, the degree of the increase was less as compared with the upper central incisor. The foregoings are suggestive of the possibility that mouth-breathing may cause labial inclination of the upper incisors.

著者

今林 あゆみ 山口 和憲 蔵満 幸子 郡司掛 香織

出版者

九州歯科学会

雑誌

九州齒科學會雜誌 : Ky◆U016B◆sh◆U016B◆-Shika-Gakkai-zasshi (ISSN:03686833)

巻号頁・発行日

vol.66, no.1, pp.11-20, 2012-02-25

参考文献数

27

著者

山本 征治

出版者

九州歯科学会

雑誌

九州歯科学会雑誌 (ISSN:03686833)

巻号頁・発行日

vol.57, no.6, pp.169-176, 2003

参考文献数

33

被引用文献数

2

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In recent years, various kinds of sports populations of youths and elders are dramatically increasing. In order that these support population can participate in a sport more happily and more safely, we have to take the safety measures for preventing serious injury of the oral maxillofacial region. Especially, for contact sports, mouth-guards, shoulder pads, leg-guards, tapings are need to be equipped as a protector for traumatic injury, It was reported that mouth-guards were useful not only to prevent injury, but to improve sport capability, and a relationship between the physiological function of the oral maxillofacial region and physical activity came to attract attention. In this paper, I will discuss the present status and the future view of sports dentistry, such as the efficacy of mouth-guards and occlusal relation on physical capability, based on the previous scientific reports and articles related to sports dentistry.

著者

大井 清

出版者

九州歯科学会

雑誌

九州歯科学会雑誌 (ISSN:03686833)

巻号頁・発行日

vol.47, no.1, pp.235-247, 1993-02-25 (Released:2017-12-21)

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Using the technique of in vivo microdialysis, extracellular concentrations of dopamine, 3, 4-dihydroxyphenylacetic acid (DOPAC) and homovanillic acid (HVA) were determined in the nucleus accumbens and ventral tegmental area, while Sprague-Dawley rats underwent lidocaine perfusion and intravenation. The microdialysis probe had semipermeable cellulose tubes (molecular weight cutoff 50, 000 : O. D. 0.22mm). Perfusion was started 12 hours after implantation of the microdialysis probe under a freely-moving condition. Measurement of the extracellular concentrations of dopamine, DOPAC and HVA was made at 20 minute intervals, which was started 120 minutes after the onset of the perfusion. Dopamine, DOPAC and HVA were quantified by a high-performance liquid chromatography coupled with an electrochemical detector. The results were as follows : 1. Extracellular dopamine levels decreased in perfusion of 10^<-3> M lidocaine for 100 minutes in nucleus accumbens and ventral tegmental area of rat brain, but they did not change in perfusion of 10^<-4>&acd;10^<-6> M lidocaine. 2. Extracellular dopamine levels did not change in intravenation of 0.74mg/min lidocaine for 20 minutes in nucleus accumbens and ventral tegmental area of rat brain. 3. It is assumed that the high concentration lidocaine inhibited mesolimbic dopamine neuron activity, but the lidocaine did not inhibit mesolimbic dopamine neuron activity when it's concentration was less than convulsion threshold.

著者

伊藤 明彦 郭 明毅 劉 嘉東 細川 隆司 永富 勝広 村上 繁樹 内田 康也 帆鷲 郷一 内山 長司

出版者

九州歯科学会

雑誌

九州歯科学会雑誌 (ISSN:03686833)

巻号頁・発行日

vol.43, no.2, pp.351-359, 1989-04-25 (Released:2017-12-21)

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In this study, we investigated the effects of the marginal surface configurations of different crown systems on the periodontal tissues. The morphology of the marginal surface of the crowns was examined by using a light- and a scanning electron microscope. In addition, biocompatibility of the materials used for crown margins was also examined by a subcutaneous implantation. The results were as follows : 1. The margins of the Ag-Pd-Au alloy full cast crowns fabricated by a conventional method were sharp and wavy with irregularities. 2. The modified method in which the margins of the Ag-Pd-Au alloy full cast crowns were rounded slightly with silicone rubber wheels was effective to make the margins smooth and round. 3. The glazed porcelain jacket crowns with metal foil copings produced sharp marginal openings because of the occurrence of a microfracture in a glass state of the ceramics. 4. The conventional ceramo-metal crowns displayed the irregularities of the surface adjacent to the boundary between metal collar and porcelain. One of the reason of this observation might be the exposure of a opaque porcelain of the crowns. 5. In the collarless ceramo-metal crowns, the marginal line configulations were totally rounded. 6. The DICOR crowns exhibited the smoothest marginal surfaces and the slightly rounded margins. 7. In the study of subcutaneous implantation, the porcelain (VMK 68) and the castable ceramic (DICOR) showed better histopathological findings than the gold alloy metal.

著者

張 皿 吉沢 浩毅 中西 英子 舩越 啓右 福山 宏 吉岡 泉 村木 祐孝 福田 仁一 村田 朋之 黒川 英雄 梶山 稔

出版者

九州歯科学会

雑誌

九州齒科學會雜誌 : Kyushu-Shika-Gakkai-zasshi (ISSN:03686833)

巻号頁・発行日

vol.51, no.5, pp.699-704, 1997-10-25

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The region of the mid-dorsum of the tongue is the preferred site of Median Rhomboid Glossitis (M. R. G.). At present, two theories, a developmental anomaly and inflammatory reaction, are mainly mentioned concerning the etiology of the M. R. G., whereas the absolute cause is unclear. There were four thousand cases in Kyushu Dental College Hospital from 1987 to 1996, but only three cases were diagnosed as M. R. G.. Histologically, Candida hyphae existed in the parakeratinized layer and lymphoplasmacytic infiltration was present in the lamina propria. These findings demonstrated that the etiology of the M. R. G. is a localized chronic Candida infection, not only a developmental anomaly.

著者

中村 勲

出版者

九州歯科学会

雑誌

九州歯科学会雑誌 (ISSN:03686833)

巻号頁・発行日

vol.11, no.2, pp.163-178, 1957-09-30 (Released:2017-12-23)

著者

高野 義臣 浦郷 篤史 金子 義郎

出版者

九州歯科学会

雑誌

九州歯科学会雑誌 (ISSN:03686833)

巻号頁・発行日

vol.12, no.1, pp.85-88, 1958-06-30 (Released:2017-12-23)

著者

古野 秀実

出版者

九州歯科学会

雑誌

九州歯科学会雑誌 (ISSN:03686833)

巻号頁・発行日

vol.23, no.3, pp.221-233, 1969

被引用文献数

2

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The development of the teeth of Ayu, Plecoglossus altivelis and its morphological and histological structures were studied. The total length of the fish ranged from 20mm to 174mm. The fishes in the present study were selected from the collection of Yamaguchi prefecture fishery laboratory. The results obtained are summarized as follows. 1. Growth and development of tooth germs. Comb-like tooth germ was shown to grow in fishes of approximately 20mm length. Pterygoid tooth germ was shown to grow in fishes of 22-28mm, and premaxillary, dentary and glossohyal tooth germs were shown to grow in 30-34mm length. 2. Eruptions. Pterygoid and glossohyal teeth erupted in fishes of 36-38mm in length. Comb-like and dentary teeth erupted in fishes of 45-47mm. Premaxillary tooth erupted in fishes of 60-66mm. 3. Numbers of the teeth. Comb-like teeth groups counted 13-14 in one quadrant of jaw. There were seen 13-19 teeth on the premaxillary, and over 30 teeth were seen on the pterygoid. There were counted 13-18 teeth on the glossohyal, and counted maximum 5-7 teeth on the dentary. 4. Formation of tooth germs. The initial stage of growth as observed in tooth germs of comb-like, pterygoid, premaxillary, dentary and glossohyal teeth was similar to that seen in mammals. 5. Enamel pulp. In each tooth germs of enamel organ, inner and outer enamel epithelium always contacted one another, therefore there was been not observed such enamel pulp, as seen in the mammalian tooth germ. 6. Enamel. Comb-like and premaxillary teeth had tubular enamel which was nomally penetrated by tubules from the dentin. Pterygoid, dentary and glossohyal teeth had hyaline enamel. 7. Dentin. Comb-like and premaxillary teeth had orthodentin. Pterygoid, dentary and glossohyal teeth had homogenous dentin. 8. The attachment of teeth. Premaxillary tooth was fibrous attachment of tooth to bone. Comb-like, pterygoid, dentary and glossohyal teeth were attachment by ankylosis.

著者

大和 寅雄

出版者

九州歯科学会

雑誌

九州歯科学会雑誌 (ISSN:03686833)

巻号頁・発行日

vol.12, no.3, pp.274-289, 1958

被引用文献数

1