バイタルブリーチ後の歯の色安定性と表面性状に及ぼす再石灰化剤の違いによる影響

Effects of different remineralizing agents on color stability and surface characteristics of the teeth following vital bleaching.

• Kübra Bilge
• Vahti Kılıç

抄録

本研究の目的は，バイタルブリーチ後の歯の色安定性と表面性状に及ぼす各種再石灰化剤の影響を調べることである．研究には，抽出した96本のヒトの切歯を使用した．はじめに，無作為に2つのグループに分け，オフィスでの漂白剤と家庭での漂白剤に暴露した．その後，5種類の再石灰化剤（Gelato APF Gel，Remin Pro，Tooth Mousse，MI Paste Plus，Curodont Protect）に応じて，漂白後に再石灰化を行わないコントロール群を含む6つのサブグループ（n＝8）に分けた。表面の粗さは、ベースライン時、漂白後、再石灰化処置後に評価した。試料の色の測定は，ベースライン時，漂白後，再石灰化処理後に染色液に浸漬した後に行った。エナメル質表面の形態的変化を調べるために，走査型電子顕微鏡および原子間力顕微鏡（AFM）による分析を行った。データの比較には，独立したt検定，ペアサンプルt検定，一元配置のANOVAを用い，研究グループ間の差を比較するために，post-hoc LSD検定を行った（α＝0.05）．表面の粗さは，すべての群でオフィスおよびホームブリーチング後に増加し，すべての群で再石灰化剤の塗布後に減少した。再石灰化剤を塗布した後の表面粗さと色調の変化については，各群間で有意差が認められた（p＜.05）。AFM分析では，漂白後に表面の粗さが増加し，再石灰化剤の処理後には粗さが減少した。再石灰化剤は，漂白後の表面粗さの増加を抑え，漂白後の色の安定性を維持するために使用できる。

The aim of the study was to investigate the effects of various remineralizing agents on the color stability and surface characteristics of the teeth after vital bleaching. The extracted 96 human incisors were used for the study. Initially, the samples were randomly divided into two groups and exposed to in-office and at-home bleaching agents. Then, the groups were divided into six subgroups (n = 8), including the control group did not undergo remineralization after bleaching, according to five remineralizing agents (Gelato APF Gel, Remin Pro, Tooth Mousse, MI Paste Plus, Curodont Protect). Surface roughness was assessed at baseline, after bleaching and remineralization procedures. Color measurements of the samples were obtained at baseline, after bleaching and then after immersion in the staining solution following remineralization process. Scanning electron microscopy and atomic force microscopy (AFM) analyzes were carried out in order to examine the morphological changes on the surface of the enamel. The independent t-test, paired-samples t-test, and one-way ANOVA was used to compare the data and post-hoc LSD test to compare the difference among the study groups (α = .05). Surface roughness increased following in-office and at-home bleaching in all groups, and reduced after application of remineralizing agents in all groups. Significant differences were found among the groups with respect to changes in surface roughness and color values following treatment with remineralizing agents (p <.05). AFM analyses revealed increased surface roughness after bleaching and a reduction of rough surfaces following treatment with remineralizing agents. Remineralizing agents can be used to reduce postbleaching increase in surface roughness and to maintain color stability after bleaching.

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