口腔病学会雑誌
Online ISSN : 1884-5185
Print ISSN : 0300-9149
64 巻 , 4 号
選択された号の論文の12件中1~12を表示しています
  • 高木 裕三
    1997 年 64 巻 4 号 p. 473-482
    発行日: 1997/12/30
    公開日: 2010/10/08
    ジャーナル フリー
  • 苗 維平
    1997 年 64 巻 4 号 p. 483-498
    発行日: 1997/12/30
    公開日: 2010/10/08
    ジャーナル フリー
  • 劉 嘉
    1997 年 64 巻 4 号 p. 499-511
    発行日: 1997/12/30
    公開日: 2010/10/08
    ジャーナル フリー
    ラット新生仔in vitro脳幹-脊髄標本を用いて, NMDAの灌流液中への投与によって誘発される舌下神経の吸啜様リズム活動を指標にして, 吸啜運動のリズムを発現させる中枢運動司令の形成に必須のニューロン集団あるいは回路 (中枢性リズム発生器) の局在を検察した。
    活動依存性にニューロンに取り込まれる蛍光色素Sulforhodamine101 (S 101) を, NMDA投与によって吸啜様リズム活動が舌下神経に出現中に投与し, これによって標識されるニューロンの局在および数を, NMDAを投与せず自発性のリズミカルな吸気活動だけが出現している標本において標識されるニューロンの局在および数と比較した。どちらの場合にも, 舌下神経核, 顔面神経核, 疑核, 孤束核, 三叉神経脊髄路核, 下オリーブ核, 外側網様核, 巨大細胞網様核, 腹側網様核などに認められた。これらの標識結果を, NMDA投与群と非投与群とで比較すると, 投与群のほうが非投与群より, 標識されたニューロンの数が多く, また蛍光も強かった。これは, 吸啜様リズム活動の出現に一致して活性化されたニューロンの数ならびに活動の増加を反映するものと想定される。これらの核のなかで, 巨大細胞網様核では, NMDA非投与群では標識されたニューロンの認められなかった例が5例中2例認められたのに対して, 投与群では5例全例で標識ニューロンが見いだされ, またその数も非投与群で標識ニューロンが認められた例に比して著しく多かった。この結果は, この核が吸啜運動の中枢性リズム形成で特に重要な役割を果たしていることを示唆している。
    NMDA投与による舌下神経の吸啜様リズム活動は, 成熟動物の咀嚼リズム形成に必須の役割を果たす領域の一部を構成する顔面神経核レベルの橋尾側部, 孤束核を含む延髄背側部, 吸啜反射で感覚性入力の伝達に関与する三叉神経脊髄路核を, 脳幹に切断を加えて除去しても残存した。
    以上の結果から, 吸啜舌運動の中枢性リズム発生器は, 巨大細胞網様核, 腹側網様核を含む延髄腹内側部に局在すると結論される。
  • 品田 佳世子, 寺岡 加代, 浅香 次夫, J. G. O. Cordeiro, 尾崎 文子, 下山 和弘, 長尾 正憲
    1997 年 64 巻 4 号 p. 512-517
    発行日: 1997/12/30
    公開日: 2010/10/08
    ジャーナル フリー
    The purpose of this investigation was to find the relationship between the occurrence of Candida species and mutans streptococci at 7 sites (saliva, tongue, mucosa, teeth, clasp, external, and mucosal denture surfaces) in the mouth of 97 elderly persons (males : 43, age : 76.4± 6.7 years; females : 54, age : 75.0 ± 6.6 years) . Among the subjects, there were complete denture wearers (n=20), partial denture wearers (n = 45), and non-denture wearers (n= 32) .
    Candida species were more significantly (p<0.001) predominant in complete and partial denture wearers (80% each) than in non-denture (18.8%) wearers. The presence of Candida was highest on the mucosal denture surfaces followed by clasp, tongue, and remaining teeth in that order. Positive correlations were significantly found between the CFU numbers of Candida species and mutans streptococci present on the external surfaces (p < 0.001), natural teeth (p<0.001), clasp (p<0.01), and saliva (p<0.05) . A negative correlation (r= -0.503 ; p<0.001) was found between the number of teeth and the CFU numbers of Candida species. Moreover, the CFU numbers of both groups of microorganisms also increased in 80-year-old and over persons. Candida species were most predominantly found in persons with poor oral and denture cleanliness.
  • 高橋 保樹
    1997 年 64 巻 4 号 p. 518-533
    発行日: 1997/12/30
    公開日: 2010/10/08
    ジャーナル フリー
    The soft denture liner was applied to dentures for the edentulous patients with poor residual ridge and thin mucosa. It is useful for minimizing the soreness caused by the denture during mastication, however, its effect on masticatory functions has been rarely investigated. The purpose of this study was to determine the effect of a soft liner applied to complete dentures on masticatory functions. Five edentulous volunteers who were satisfied with their new complete dentures took part in this study. The lower dentures were lined with a soft liner. Comparison of occlusal force, masticatory performance, masseter muscular activity, and mandibular movement were made between new dentures and relined dentures.
    The results of applying soft materials to lower dentures obtained by comparison with complete dentures using hard acrylic resin bases were follows
    1. occlusal forces were significantly larger (p<0.01) .
    2. Masticatory performance in chewing peanuts increased slightly. The number of strokes and time for masticating a peanut decreased significantly (p<0.01) .
    3. Masticatory muscles functioned more rhythmically and mandibular movements became smoother.
    4. Integrated EMGs per stroke of all patients was similar.
  • 高松 伸博
    1997 年 64 巻 4 号 p. 534-543
    発行日: 1997/12/30
    公開日: 2010/10/08
    ジャーナル フリー
    The purpose of this study was to examine microbiological changes after periodontal initial therapy by DNA probe and polymerase chain reaction (PCR) assays in addition to clinical evaluation. Twenty-six periodontitis patients, 10 males and 16 females, were selected. All subjects were treated by scaling and root planing following oral hygiene instruction. Bacterial samples were collected with paper points from a total of 104 sites, 4 sites in each patient, at baseline and after initial therapy. DNA probe analysis was used to monitor Bacteroides forsythus and Porphyromonas gingivalis. PCR analysis was performed to identify the presence of Actinobacillus actinomycetemcomitans. The initial therapy resulted in significant clinical improvements as assessed by clinical parameters including pocket depth, attachment level and bleeding on probing. After the therapy, the detection frequency of B. forsythus and P. gingivalis was significantly reduced, but the detection frequency of A. actinomycetemcomitans did not significantly decreased. These results indicated that initial therapy can bring about elimination of B. forsythus and P. gingivalis by means of conventional techniques, but not of A. actinomycetemcomitans. When complete elimination of these microorganisms was obtained, significant clinical improvement was found. Monitoring the changes of three bacteria may provide a more effective modality.
  • 平田 幹男
    1997 年 64 巻 4 号 p. 544-556
    発行日: 1997/12/30
    公開日: 2010/10/08
    ジャーナル フリー
    In the 1950 s, a new method of using magnets for the retainers of removable partial dentures (RPDs) was developed. It utilized magnetic attractive force instead of mechanical friction. However, the magnets used in those days were Alnico, Ferrite and/or Pt-Cobalt magnets and their retentive force was not strong enough to stabilize the dentures. Therefore, they gradually went out of use.
    In the middle of the 1970 s, Samarium Cobalt magnets, which have strong magnetic characteristics, were developed and introduced into dental field. In 1976, Sasaki first applied the samarium cobalt magnets to the retainers of PPDs. While in 1981, Mizutani, et al. first used wellfitted ferromagnetic alloy and the magnet for the purpose of stabilizing the RPD. Since then, many researchers have developed devices such as the magnetic retainer and the closed field magnetic attachment placed on the market in 1992. Now, as for the popular retainer of RPD, one can easily use a smaller yet stronger magnetic attachment which uses Neodium rather than Samarium Cobalt magnet.
  • 門磨 義則
    1997 年 64 巻 4 号 p. 557
    発行日: 1997/12/30
    公開日: 2010/10/08
    ジャーナル フリー
  • 近藤 尚知
    1997 年 64 巻 4 号 p. 558
    発行日: 1997/12/30
    公開日: 2010/10/08
    ジャーナル フリー
  • 矢野 和子, 石川 烈
    1997 年 64 巻 4 号 p. 559
    発行日: 1997/12/30
    公開日: 2010/10/08
    ジャーナル フリー
  • 柴田 俊一, 山下 靖雄
    1997 年 64 巻 4 号 p. 560
    発行日: 1997/12/30
    公開日: 2010/10/08
    ジャーナル フリー
  • 金子 重遠, 天笠 光雄
    1997 年 64 巻 4 号 p. 561
    発行日: 1997/12/30
    公開日: 2010/10/08
    ジャーナル フリー
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