さまざまな歯肉退縮剤の退縮効果について

[The retractive effects of different gingival retraction agents].

抄録

目的:

さまざまな歯肉退縮剤の退縮効果を評価すること。

OBJECTIVE: To evaluate the retractive effects of different gingival retraction agents.

方法:

健康な歯肉を有する30名の被験者を募集し，各被験者（n=60）の上顎前歯部の頬側歯肉溝を6種類の薬剤--グループAは塩酸テトラヒドロゾリン，グループBは塩酸オキシメタゾリン，グループCは塩酸エピネフリン，グループDはAlCl3，グループEはFe2 (SO4)3，グループFは通常の生理食塩水--のいずれかで無作為に処理した。実験歯の頬側歯肉溝の正確な印象を前処理と後処理の両方で作成し、無水石膏模型を作成した。実験歯の模型は、頬舌側の頬側乳頭部で2mmの厚さに切断した。その後，低倍率の顕微鏡を用いて，歯から歯肉の頂上までの距離として溝の幅を測定し，これらの歯肉退縮剤の効果を比較した．

METHODS: Thirty subjects with healthy gingival conditions were recruited to the trial, and the buccal gingival sulcus of the hibateral first max-illary premolars of each subject (n=60) were treated randomly with one of the six agents--Group A was tetrahydrozoline hydrochloride, Group B was oxymetazoline hydrochloride, Group C was epinephrine hydrochlorid, Group D was AlCl3, Group E was Fe2 (SO4)3, and Group F was normal saline as control. Both pre-treated and post-treated accurate impressions of buccal gingival sulcus of the experimental teeth were made, so were the anhydrite casts. The casts of experimental teeth were sectioned into 2 mm slices bucco-lingually at the buccal eminence. Then the width of the sulcus was measured as the distance from the tooth to the crest of the gingival under a low-power microscope to compare the effect of these gingival retraction agents.

結果:

歯肉溝の幅は，すべての群で治療後に大きくなった（P < 0.05）。A群またはB群のいずれかが、C群およびF群よりも歯肉退縮効果が大きかった（P < 0.05）。グループFを除き、グループDとグループEは、他のグループとの間に有意な差はなかった（P＞0.05）。D群とE群の間には統計的に有意な差はなく（P＞0.05）、A群とB群の間にも統計的に有意な差はありませんでした（P＞0.05）。

RESULTS: The width of gingival sulcus became larger after the treatment in all groups (P < 0.05). Either Group A or Group B had greater gingival retraction effects than Group C and Group F (P < 0.05). Except Group F, both Group D and Group E had no significant differences from the other groups (P > 0.05). There was no statistically signification between Group D and Group E (P > 0.05), neither was there any statistically significance between Group A and Group B (P > 0.05).

結論:

Tetrahydrozolineは歯肉退縮に優れた効果を示した。

CONCLUSION: Tetrahydrozoline manifested excellent effect of gingival retraction.