颌骨囊肿刮除术并发症的预防与处理

 颌骨囊肿刮除术是牙源性颌骨囊肿的常规治疗手段，但囊肿刮除术中、术后的并发症常影响骨腔的愈合以及患者的生活质量。常见并发症有术后感染、囊肿复发、病理性骨折、感觉异常等。这些并发症的发生与囊肿大小、患病部位、手术方式、是否有植入物等有密切关系。避免或减少这些并发症对提高临床疗效、改善患者生活质量有非常重要的意义。文章结合该领域研究现状和笔者的经验，介绍颌骨囊肿刮除术相关并发症的预防与处理。

Clinical trial of 0.6% fluoride foam to prevent dental caries in primary teeth of preschool children

Objective To observe the effect of 0.6% fluoride foam on preventing dental caries in primary teeth of preschool children. Methods A total of 396 preschool children from 3 kindergartens were randomly assigned into the experimental group and the placebo control group in a double-blind， cluster randomised，placebo-controlled trial. The experimental group received a biannual 0.6% professional application，and the placebo control group received the placebo for 2 years. Results After two rears， the mean caries increment in the experimental group was 1.81 ± 0.77 dmfs while it was 2.41 ± 0.82 dmfs in the placebo control group. The results showed significant difference between the two group（P < 0.05）. There was significant difference in the mean caries increment on occlusal surfaces between the two group （P < 0.05）. Conclusion 0.6% fluoride foam was effective in preventing the increment of dental caries in primary teeth of preschool children.