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MTAセメントの根管象牙質への拡散に及ぼす潅流液の違いによる影響
Effect of Different Irrigation Solutions on the Diffusion of MTA Cement into the Root Canal Dentin.
PMID: 33271754
抄録
(1) 目的:本研究は,異なる歯内療法用灌流液を用いた場合のケイ酸塩根管シーラーの象牙細管への浸潤をin vitroで解析することを目的とした.(2)方法(2) 方法:単根歯 29 本を最終潅流プロトコールにより 3 群に分けた.G1(=10)=17%EDTA(ethylenediaminetetraacetic acid)+3.0%次亜塩素酸ナトリウム(NaOCl),G2(=10)=17%EDTA+2%クロルヘキシジン,G3(対照群,=9)=17% EDTA+生理食塩水であった.根管はCold lateral compaction techniqueにより,MTA Fillapex sealerとガッタパーチャで充填した.シーラーはローダミンBで標識した。歯は中間部と第3先端部で分割し、10×共焦点レーザー顕微鏡で可視化し、シーラーの浸透率を測定した。(3)結果歯根端部では、シーラーの浸透率に関して群間で統計的に有意な差は認められなかった。中間部では,Group 1が最も高く,Group 2が最も低かった(= 0.004).また、Group 1はControl Groupと統計的に有意な差を示し( = 0.031)、シーラー浸透度の値も近かった。一方、Control Group ( = 0.023 ) とGroup 2 ( = 0.029 ) は、先端部と中間部の間でシーラー浸透度が有意に減少していることが明らかになった。(4) 結論NaOCl による最終イリゲーションは,先端部と中間部でほぼ同様の浸透を促進することが示唆された.一方,クロルヘキシジン群および生理食塩水群では,中間部のシーラー浸透性が有意に低下することが確認された.NaOClは他の潅流液と比較して、より均一なシーラーの浸透を促進し、それはより良い封鎖、ひいてはより高い歯内療法の成功に関連する可能性がある。
(1) Aim: This study aims to analyze the in vitro infiltration of a silicate root canal sealer into dentinal tubules after using different endodontic irrigating solutions. (2) Methods: Twenty-nine teeth with single roots were separated into three groups according to the final irrigation protocol: G1 = 10) = 17% EDTA (ethylenediaminetetraacetic acid) + 3.0% sodium hypochlorite (NaOCl), G2 ( = 10) = 17% EDTA + 2.0% chlorhexidine and G3 (Control group, = 9) = 17% EDTA + saline solution. Root canals were filled using cold lateral compaction technique with MTA Fillapex sealer and gutta-percha. The sealer was labeled with rhodamine B. The teeth were segmented at the middle and third apical sections, which were visualized using 10× confocal laser microscopy to determine the sealer penetration percentage. (3) Results: In the apical section, no statistically significant differences were found between the groups regarding sealer penetration. In the middle section, Group 1 obtained the highest percentage, and Group 2 the lowest ( = 0.004). Group 1 also presented statistically significant differences in the Control Group ( = 0.031) and had close sealer penetration values. Meanwhile, the Control Group ( = 0.023) and Group 2 ( = 0.029) revealed a significant decrease of sealer penetration between the apical and middle sections. (4) Conclusion: The obtained results support that final irrigation with NaOCl promoted similar sealer penetration in the apical and middle sections. On the other hand, a significant decrease in the sealer penetration of the middle section was observed for the chlorhexidine and saline groups. Compared to other irrigant solutions, NaOCl promotes more uniform sealer penetration, which can correlate with better sealing and, consequently, higher endodontic treatment success.