義歯からクリーム状義歯接着剤を除去するための界面活性剤の選択と義歯洗浄剤への応用に関するin vitro試験

An in vitro study on the selection of surfactants for removal of cream denture adhesives from dentures and their application to denture cleaners.

抄録

目的 義歯用接着剤は不適合義歯の安定性を向上させるが、使用後の接着剤の完全除去は困難である。しかし、使用後の接着剤の完全除去は困難である。そこで本研究では，アクリル樹脂材料に付着したクリーム状義歯床用接着剤の除去における界面活性剤の有効性を評価することを目的とした．方法 様々な親水親油バランス（HLB）値を有する12種類の界面活性剤の溶液を調製した．透明なアクリル樹脂板上に，可視化のために着色した2種類のクリーム義歯用接着剤を塗布した．界面活性剤溶液に浸漬後，界面活性剤が残留接着剤に及ぼす影響を評価した．また，義歯洗浄剤（界面活性剤を含むもの，含まないもの）が接着剤および人工油汚れの除去性に及ぼす影響，義歯材料の表面性状に及ぼす影響についても検討した．その結果，HLB値が10.5〜13.5の範囲にある5種類の界面活性剤［BT-5，BL-4.2，BT-7，BT-9，Triton X-100（TX）］が接着剤を効果的に除去した．義歯洗浄剤にBT-9とTX（HLB=13.5）を添加すると、接着剤の除去性が向上した。結論10.5-13.5のHLB値をもつ界面活性剤は，アクリル樹脂材料に付着したクリーム義歯用接着剤の除去に適している．特に，TX（HLB=13.5）は，義歯材料を損傷したり，本来の洗浄力を損なったりすることなく，効率的に接着剤を除去した．

Purpose Denture adhesives improve the stability of incompatible dentures; however, complete removal of adhesives after use is difficult. Only a few studies have focused on the removal of denture adhesives. Hence, this study aimed to assess the efficacy of surfactants in removing cream denture adhesives from acrylic resin materials.Methods Solutions of twelve surfactants with various hydrophilic-lipophilic balance (HLB) values were prepared. Two cream denture adhesives, colored for visualization, were spread onto transparent acrylic resin plates. After immersion into surfactant solutions, the effects of the surfactants on residual adhesives were evaluated. We also investigated the effect of denture cleaners (with or without the surfactants) on the removability of adhesives and artificial oily dirt, and their effects on the surface properties of denture materials. The obtained data were analyzed using appropriate statistical methods.Results Five surfactants [BT-5, BL-4.2, BT-7, BT-9, and Triton X-100 (TX)] with HLB values in the 10.5-13.5 range effectively removed adhesives. Addition of BT-9 and TX (HLB=13.5) to denture cleaners improved the adhesives' removal. Furthermore, the addition of TX to the cleaners did not interfere with the removal of artificial oily dirt and did not damage the denture materials' surface.Conclusions Surfactants with HLB values in the 10.5-13.5 range are suitable for removal of cream denture adhesives from acrylic resin materials. In particular, TX (HLB=13.5) efficiently removes adhesives without damaging denture materials or impairing original detergency.