アブストラクト(20巻2号:神奈川歯学)

神奈川歯学

Japanese

Title : 超音波振動による小窩裂溝の清掃効果に関する細菌学的検討
Subtitle : 原著
Authors : 込宮恒, 寺中敏夫, 青野忠之, 鈴木勝, 篠原瑞男, 岩本次男
Authors(kana) :
Organization : 神奈川歯科大学保存学教室第一講座
Journal : 神奈川歯学
Volume : 20
Number : 2
Page : 246-252
Year/Month : 1985 / 9
Article : 原著
Publisher : 神奈川歯科大学学会
Abstract : 「緒言」咬合面小窩裂溝は平滑面に比べ機械的清掃が困難なため, 萌出後数年間は齲蝕感受性が高く, また, その進行も速いとされている. このような小窩裂溝の齲蝕を予防する手段として, 高分子材料によりこれを封鎖する小窩裂溝シーラントが一般に用いられているが, その保持と封鎖性に関しては問題点が多く残されている. その原因として, シーラントが適用される歯が萌出途上にあり, 確実な防湿が困難なこと, 小窩裂溝の解剖学的形態が非常に複雑であるばかりでなく, 無柱エナメル質および低石灰化部を有するなど特徴的な組織構造を有し, しかも小窩裂溝内部はプラーク等の有機質によって満たされているため, 酸によるエッチング効果が十分に得られないことなどがあげられる. 日常の臨床において, シーラント適用部位に対してはブラシコーンと探針による清掃が一般に行われているが, 前述のごとく複雑な形状の小窩裂溝内部を完全に清掃することは不可能であり, プラーク, 食物残渣あるいは口腔液を裂溝内に残存させた状態で, シーラントが適用されるため, シーラントの剥離, 脱落, 細菌の増殖ひいては二次齲蝕の発生など事故を招く結果となる.
Practice : 歯科学
Keywords :

English

Title : Microbiological Study on the Cleansing Effect of Ultrasonic Vibration to Pits and Fissures.
Subtitle : Original article
Authors : Wataru KOMIYA, Toshio TERANAKA, Tadayuki AONO, Masaru SUZUKI, Mizuo SHINOHARA, Tsugio IWAMOTO
Authors(kana) :
Organization : Department of Restorative Dentistry, Kanagawa Dental College
Journal : Kanagawa Shigaku
Volume : 20
Number : 2
Page : 246-252
Year/Month : 1985 / 9
Article : Original article
Publisher : Kanagawa Odontological Society
Abstract : It has been demonstrated that pit and fissure sealant is most likely effective to prevent the occurence of pit and fissure caries. However, it is not widely accepted by dental profession because of its unreliable retentive and sealing properties. The loss of sealants are mainly due to the remaining organic materials and microbial plaque in pits and fissures. In this study, therefore, the cleansing effect of ultrasonic device applied to pit and fissure was evaluated microbiologically. Ten lower first molars were selected from ten children, seven of which have "sticky fissure" carious lesions and classified as C1 group, while the rest without any carious lesion were grouped as control(C0). 100μl of Phosphate Buffered Saline(PBS)was applied on the occlusal surface of experimental tooth and ultrasonic cavitation were given for ten seconds by means of dipping the tip of #15 K-type file into PBS, then 50μl of PBS was sampled. These sampling procedures were repeated five times, but at the last twice, the ultrasonic vibration was applied directly by inserting the tip into the central pit of the tooth. After cultivation of the samples, the number of viable microorganisms, Streptococci, S. mutans and S. sanguis were enumerated. The results obtained were as follows: 1. Inserting the file tip into central pit, the number of detected microorganisms increased significantly in comparison with that of microorganisms in samples obtained only from ultrasonic cavitation. 2. The detected microorganisms decreased significantly with the increase of cleansing times. 3. Significant number of microorganisms were found in C1 group comparing with those in C0 group regardless of sampling manners. 4. The majority of microorganisms from the central pit of the tooth were Streptococci, and S. mutans were dominant.
Practice : Dentistry
Keywords :