フッ化水素酸およびフッ化ナトリウムを含有する歯磨剤による歯周病罹患歯の象牙細管の咬合について

Occlusion of dentinal tubules on periodontally involved teeth by dentifrice containing stannous fluoride and sodium fluoride.

抄録

目的:

本研究では、フッ化第一三共（SnF）およびフッ化ナトリウム（NaF）を配合した歯磨剤の歯周病罹患歯に対する咬合効果を、SEMを用いて健常歯と比較し、NaF単独配合の歯磨剤と比較検討した。

PURPOSE: This study examined the occlusion effect of a dentifrice containing stannous fluoride (SnF) and sodium fluoride (NaF) on periodontally involved teeth in comparison with healthy teeth using scanning electron microscopy (SEM) in comparison with a dentifrice containing NaF alone.

方法:

単根の小臼歯から得られた60本の歯質試料（そのうち15本は矯正のために抜歯したもの（H群）、15本は歯周破壊のため（P群））を本研究に組み入れた。各試料群はさらに、HCとPC（コントロール）、H1とP1（SnFとNaFで処理）、H2とP2（NaFで処理）のサブグループに分けられた。サンプルは1日2回、7日間ブラッシングし、人工唾液中で保管し、SEMで検査した。開いた管の直径と管の数は、2,000倍の倍率で評価した。

METHODS: Sixty dentine samples obtained from single-rooted premolars, 15 of them extracted for orthodontic reasons (Group H) and 15 because of periodontal destruction (Group P), were included in the study. Each group of specimens was further divided into subgroups: HC and PC (control), H1 and P1 (treated with SnF and NaF), and H2 and P2 (treated with NaF). The samples were brushed twice a day for 7 days, kept in artificial saliva, and examined by SEM. The diameters of open tubules and the numbers of tubules were assessed at ×2,000 magnification.

結果:

H群とP群では、開口管の直径はほぼ同じであった。H1、P1、H2、P2群の開口管数はHC、PC群に比べ有意に少なく（P < 0.001）、閉塞管数の割合と一致した。P1群では、閉塞尿細管の割合が最も高かった。

RESULTS: The H and P groups showed similar diameters of open tubules. The numbers of open tubules in Groups H1, P1, H2, and P2 were significantly lower than in Groups HC and PC (P < 0.001), and consistent with the percentages of occluded tubules. Group P1 had the highest percentage of occluded tubules.

結論:

いずれの歯磨剤も象牙細管の咬合に成功したが，SnFとNaFを含む歯磨剤が歯周病罹患歯において最も高い咬合度を示した．

CONCLUSIONS: Although both dentifrices were found to successfully occlude dentinal tubules, the dentifrice containing SnF and NaF provided the highest degree of occlusion in periodontally involved teeth.