臼歯部における歯間器具のプラーク除去効果．

Plaque-removing Effects of Interdental Instruments in Molar Region.

• Ryuichi Hisanaga
• Akimasa Shinya
• Toru Sato
• Syuntaro Nomoto
• Mamoru Yotsuya

抄録

デンタルフロスや歯間ブラシなど、多くの種類の歯間器具が手軽に購入でき、大量に販売されています。これらの器具の効果を比較した研究が多く行われている。しかし、歯垢の残存領域との関係を調べた研究はほとんどない。本研究の目的は，指巻式デンタルフロス，ホルダー式デンタルフロス，歯間ブラシの3種類の歯間器具を用いて，両側上顎・下顎前歯・大臼歯の中・遠位面からのプラーク除去率を比較することであった．実験に先立ち，人工歯垢塗布のために顎模型の人工歯を除去した．その後，歯を交換し，模型をファントムに装着した．作業者が実際の歯磨きに近い姿勢で各器具を用いて歯を磨き，プラーク除去率を比較した．指巻きフロスが最も歯垢除去率が高かったが，指巻きフロスは他の器具に比べて持ちやすさが劣るが，ハンドル付きフロスの歯垢除去率が最も高かった．ハンドル付き歯間器具では，持ちやすいが一部の部位でプラーク除去率が低下していた．この結果から，清掃する部位によって使用する歯間器具の種類が異なることが示唆された．

Many types of interdental instrument, such as dental floss and interdental brushes, can be purchased easily and sell in large numbers. Many studies have compared the effects of such instruments. Few studies have investigated their relationship with regions of residual plaque, however. The purpose of this study was to compare rates of plaque removal from the mesial and distal surfaces of the bilateral maxillary and mandibular premolars and molars among 3 types of interdental instrument: finger-winding-dental floss, holder-type dental floss, and an interdental brush. Prior to the experiment, the artificial teeth in a jaw model were removed for application of artificial plaque. The teeth were then replaced and the model attached to a phantom. An operator brushed the teeth in a posture close to that adopted in actual tooth brushing with each type of instrument, after which the plaque removal rate was compared among them. The rate of plaque removal using finger-winding floss was the highest, although this type of instrument is less easy to hold than the others. The rate with a handle-equipped interdental instrument showed a decrease in some regions, although it is easy to hold. The results of this study suggest that the type of interdental instrument used should differ depending on the region to be cleaned.