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銀ナノ粒子/水酸化カルシウム混合液と他の根管治療薬の抗菌効果の残留性
Residual antibacterial effects of a mixture of silver nanoparticles/calcium hydroxide and other root canal medicaments against .
PMID: 35784127
抄録
背景・目的:
歯内療法を成功させ、再感染を予防するために、高い残留抑制効果を有する根管内治療薬が使用されている。本試験は、薬物治療後1週間の根管内象牙質における各種根管治療薬の抗菌力残存効果を評価することを目的とした。
BACKGROUND/PURPOSE: Intracanal medicaments with high residual inhibition effects are used to achieve successful endodontic treatment and prevent reinfection. This in vitro study aimed to assess antimicrobial residual effects of different intracanal medicaments against in root dentin one week after drug therapy.
材料と方法:
70本のヒト歯を長さ15mmに規格化し、ProTaperロータリーシステムを用いて作製した。CHX群:2%クロルヘキシジンゲル、CH群:水酸化カルシウムペースト、CH/CHX群:水酸化カルシウムと2%CHXの混合物、TAP群:トリプル抗生物質ペースト、DAP群:ダブル抗生物質ペースト、CH/AgNPs群:CHペーストと銀ナノ粒子懸濁液の混合物。1週間後、根管から薬剤を除去し、根管内に接種した。歯は37℃で24時間培養した。サイズ40のヘドストロームファイルを用い、象牙質チップを採取し、コロニー形成単位数をカウントした。
MATERIALS AND METHODS: Seventy human teeth were standardized to have 15 mm of length and were prepared by ProTaper rotary system. The teeth were randomly divided into six experimental (n = 10) and two control (n = 5) groups and subjected to drug therapy as follows; group CHX: 2% chlorhexidine gel, group CH: calcium hydroxide paste, group CH/CHX: mixture of calcium hydroxide and 2% CHX, group TAP: triple antibiotic paste, group DAP: double antibiotic paste, group CH/AgNPs: mixture of CH paste and silver nanoparticle suspension. After one week, the medicaments were removed from the root canals and was inoculated into the canals. The teeth were incubated at 37 °C for 24 h. Using a size 40 hedstrom file, dentin chips were collected and number of colony forming units were counted.
結果:
DAP群とTAP群を除き、すべての実験群間の差は統計学的に有意であった(P<0.05)。DAPおよびTAP後、コロニー数が最も少なかったのはCH/AgNPs群、CH/CHX群およびCHX群であった。最もコロニー数が多かったのはCH群であった。
RESULTS: The difference between all experimental groups was statistically significant in this regard (P < 0.05) except for DAP and TAP groups, in which, no bacterial colony was noted after culture. After DAP and TAP, the lowest colony count was noted in CH/AgNPs, CH/CHX and CHX groups. The highest colony count was noted in CH group.
結論:
TAP、DAPおよびCH/AgNPの1週間後の抗菌効果は良好であった。
CONCLUSION: Our results showed favorable residual antibacterial effects of TAP, DAP and CH/AgNP medicaments after one week of application.