Chu C H, Lo Edward
Faculty of Dentistry, The University of Hong Kong.
Ann R Australas Coll Dent Surg. 2008 Jun;19:58-61.
Fluoride varnish is developed to prolong the contact time between fluoride and tooth surface, so that the tooth becomes more resistant to caries attack. The active ingredient of fluoride varnish is usually 5% sodium fluoride, (22,600 ppm fluoride). Studies have found that fairly insoluble globules of calcium fluoride-like material formed on the tooth surface after topical fluoride application. These globules act as a reservoir of fluoride in the mouth for a prolonged period of time. Systematic reviews corroborate evidence for the efficacy of fluoride varnish in the prevention of dental caries. Sodium fluoride varnish is used to prevent caries development, arrest early enamel and even soft dentine caries through promotion of remineralization of carious tooth substance. It is also used to treat tooth hypersensitivity. Some use it as a provisional luting agent by itself or combined with other provisional luting agents for cementing provisional crowns. Fluoride varnish has recently gained much attention in dentistry because it is quick and easy to apply. It sets rapidly on teeth, and gagging and swallowing is unusual. Side-effects or complications of its use are rare. Studies show that fluoride varnish is safe for young children and the risk of dental fluorosis is minimal. The simplicity of its application makes it very suitable and practical for use in dental clinics and outreach dental services, especially in young children and in other special needs groups.
氟化物 varnish 的研发目的是延长氟化物与牙齿表面的接触时间，从而使牙齿对龋齿攻击更具抵抗力。氟化物 varnish 的活性成分通常是 5% 的氟化钠（22,600 ppm 氟化物）。研究发现，局部应用氟化物后，牙齿表面会形成相当不溶性的类似氟化钙的球状物质。这些球状物质在口腔中作为氟化物的储存库存在较长时间。系统评价证实了氟化物 varnish 在预防龋齿方面的有效性证据。氟化钠 varnish 用于预防龋齿发展、阻止早期釉质甚至软牙本质龋齿，通过促进龋坏牙体组织的再矿化来实现。它还用于治疗牙齿过敏症。一些人将其单独用作临时粘结剂，或与其他临时粘结剂联合用于粘结临时冠。氟化物 varnish 最近在牙科领域备受关注，因为它应用快速简便。它能在牙齿上迅速凝固，很少引起作呕和吞咽问题。其使用的副作用或并发症很少见。研究表明，氟化物 varnish 对幼儿是安全的，氟斑牙的风险极小。其应用的简便性使其非常适合并实际应用于牙科诊所和外展牙科服务，尤其是在幼儿和其他特殊需求群体中。
