Yamaga T, Nokubi T
Department of Removable Prosthodontics, Faculty of Dentistry, Osaka University, Japan.
J Prosthet Dent. 1997 Sep;78(3):315-9. doi: 10.1016/s0022-3913(97)70032-5.
The exposed dentin of overdenture abutments can lead to caries. Therefore chemical protection is needed to prevent caries. Considering that dentin contains both organic and inorganic components, reinforcement of both components should give reasonable results. Tannin-fluoride preparation strengthens both the organic and inorganic components of teeth.
This study examined whether the tannin-fluoride preparation protects noncoping abutments.
Thirty-one subjects aged 36 to 86 years participated in the clinical trial. A trial autopolymerizing resin containing the preparation or a conventional autopolymerizing resin was applied to the inner surface of the denture base, which was in contact with the abutments. When there were autopolymerizing resin group abutments, there was also at least one preparation group abutment under the overdenture.
The incidence of caries in the preparation and autopolymerizing resin groups were 0% and 0%, respectively, for the first 2 years, 4.5% and 0%, respectively, during the 3- to 4-year period, 13.8% and 75%, respectively, during the 5- to 8-year period, and 10% and 15%, respectively, in total. Gingival crevicular fluid demonstrated a tendency to decrease in both groups over time.
The trial autopolymerizing resin containing the preparation has a long-term caries prevention effect, and helps to maintain gingival health. Without adding clinical steps, abutments can be protected by the tannin-fluoride preparation.
覆盖义齿基牙的暴露牙本质可导致龋齿。因此，需要进行化学保护以预防龋齿。考虑到牙本质同时含有有机和无机成分，对这两种成分进行强化应能取得合理效果。单宁氟制剂可强化牙齿的有机和无机成分。
本研究探讨单宁氟制剂是否能保护无顶盖基牙。
31名年龄在36至86岁之间的受试者参与了该临床试验。将含有该制剂的试验性自凝树脂或传统自凝树脂应用于义齿基托与基牙接触的内表面。当存在自凝树脂组基牙时，覆盖义齿下也至少有一个制剂组基牙。
在最初2年，制剂组和自凝树脂组的龋齿发生率分别为0%和0%；在3至4年期间，分别为4.5%和0%；在5至8年期间，分别为13.8%和75%；总体分别为10%和15%。两组龈沟液均显示出随时间减少的趋势。
含该制剂的试验性自凝树脂具有长期防龋效果，并有助于维持牙龈健康。无需增加临床步骤，单宁氟制剂即可保护基牙。
