SDF/SSKI塗布がう蝕性第一象牙質に対するコンポジットレジンの微小引張接着強さに及ぼす影響に関する研究

Effect of SDF/ SSKI Application on Microtensile Bond Strength of Composite Resin to Carious Primary Dentin: An Study.

抄録

目的:

このin vitro研究の目的は、フッ化ジアミン銀（SDF）塗布後にヨウ化カリウム（SSKI）飽和溶液を塗布することが、小臼歯の天然むし歯象牙質に対するコンポジットレジンの微小引張接着強さ（mTBS）に及ぼす影響を検討することである。

PURPOSE: The purpose of this in vitro study was to investigate the effect of applying silver diamine fluoride (SDF) followed by a saturated solution of potassium iodide (SSKI) on the microtensile bond strength (mTBS) of composite resin to the natural carious dentin of primary molars.

方法:

抜歯した69本の小臼歯の齲蝕象牙質を3つのグループのいずれかに無作為に割り付け、準備した患部象牙質を治療した：(1) A-SDF/SSKI群、(2) B-SDF単独群、(3) C-脱イオン水群。コンポジットレジン修復材で修復した後，試験片を作製し，万能試験機でmTBSの試験を行った．接着強度の中央値はKruskal-Wallis検定により比較した．

METHODS: Sixty-nine extracted carious primary molars were randomly allocated to one of the three groups, where the prepared affected dentin was treated with: (1) group A-SDF/SSKI; (2) group B-SDF alone; and (3) group C-deionized water. After restoration with composite resin restorative material, specimens were prepared and tested for mTBS in the universal testing machine. Median bond strengths were compared using the Kruskal-Wallis test.

結果:

A群，B群，C群のmTBSの中央値（範囲）は，それぞれ16.99（6.55～95.60），17.71（4.93～101.1），24.60（5.29～91.7）MPaとなった．微小引張接着強さは3群間で統計的に有意な差はなかった（P=0.94）．

RESULTS: The median (range) values of mTBS in groups A, B, and C were 16.99 (6.55 to 95.60), 17.71 (4.93 to 101.1), and 24.60 (5.29 to 91.7) MPa, respectively. There was no statistically significant difference in the microtensile bond strength among the three groups (P=0.94).

結語:

フッ化ジアンミン銀とヨウ化カリウムの飽和溶液を併用しても，SDFを単独で塗布しても，in vitroにおけるコンポジットレジンのう蝕象牙質への接着強さに大きな抑制効果はない．

CONCLUSION: The application of either silver diamine fluoride along with a saturated solution of potassium iodide or SDF alone does not have a significant inhibitory effect on the bond strength of the composite resin to carious dentin in vitro.