安氏Ⅱ类1分类错(牙合)是临床常见的错(牙合)畸形之一,傅民魁等[1]调查25 392名不同地区不同牙(牙合)阶段的儿童.发现安氏Ⅱ类错(牙合)占调查人数的20.05%,安氏Ⅱ类1分类错(牙合)的早期治疗备受关注.

目的评价囊肿减压引流术在较大根尖囊肿治疗中的应用效果。方法采用开窗减压引流和根管治疗术治疗较大根尖囊肿,观察疗效。结果囊肿减压引流术和根管治疗术治疗较大根尖囊肿,总有效率达92.9%。结论囊肿减压引流术和根管治疗术治疗较大根尖囊肿疗效显著,痛苦小,病人乐于接受。临床上有推广应用价值。

目的:观察T4K矫治器对于安氏II 类1分类患者的早期治疗效果.方法:选择20 例安氏II 类 1分类错(牙合)患者,年龄为8～10 岁(10 男、10 女).戴用澳大利亚Myofunctional Research公司的T4K矫治器.对照组20 人,年龄为9～11 岁,同样是安氏II类1 分类错(牙合)患者,但未经矫治.矫治前后均通过X线头影测量并记录.经过(12.1±1.8)月的治疗后与对照组进行比较.测量后的均值及标准差采用配对样本和独立样本t检验分析.结果:治疗组显示显著的变化,包括面形的改善和下颌矢状向的发育, SNB角及面部高度的增加, ANB角减小,下前牙长轴有明显改善,及前牙覆盖减小.对照组仅表现为面高增加.结论:T4K矫治器在安氏II类1分类错(牙合)的早期治疗中作用十分明显,有推广应用价值.

目的通过X线头影测量分析T4K矫治器治疗替牙期安氏Ⅲ类错(牙合)患者,前牙深覆盖伴前牙拥挤,采用T4K矫治器进行矫治.结果T4K矫治器可以治疗安氏Ⅲ类错(牙合)矢状关系不调,而且可以改善前牙突度及轴倾度.结论T4K矫治器可用于替牙期安氏Ⅲ类错(牙合)的治疗.

Objective To investigate the permanent tooth caries of 12-year-old children in Kaifeng. Methods 1,033 12-year-old children were chosen in Kaifeng. According to our country standards and oral cavity health criteria, regular oral health examinations were conducted and the results were recorded for each examination. Results The caries incidence of 12-year-old children in Kaifeng is 19.65%. The mean DMF is 0.32. Conclusion The permanent teeth caries of 12-year-old children occur on the occlusal surface of the first permanent molar. There are two factors to be considered: ①The dental health care education to the parents should be enforced. ②In order to prevent caries, caries-prevention coatings should be conducted.

AIM:To discuss the application of T4K appliance in Angle′s Ⅰ、Ⅱ、Ⅲ malocclusion during mixed dentition.METHODS: We adopted soft T4K appliances on patients at first.If there were no evident improvements in symptom after two appointments,we would change to the hard ones.The therapy was over when occlusions was centric occluson.RESULTS:The average therapy time of three types of malocclusion separately were 9.5、10、13 months.CONCLUSION:T4K appliance is adapted for malocclusion during mixed dentition.

Objective To study the more effective treatment of anterior cross bite.Methods 38 cases with neutrocclusal permanent anterior cross bite were selected.The 38 cases had deeper reversed overbite and shallow reversed overbite.The patients were treated by edgewise appliance and mandibular occlusal pad.Results The course of treatment was 7 months on average,and the effectiveness was very good.Conclusions The edgewise appliance and mandibular occlusal pad was suitable for the treatment on neurtrocclusal anterior cross bite with deeper reversed overbite.

复发性口腔溃疡是常见的口腔疾病,其发病率高,居口腔粘膜病的首位[1].复发性口腔溃疡发生后,可使口腔粘膜发生上皮溶解、破溃、脱落等病理改变[2].作者研制了一种单向控制释药的复方甲硝唑贴膜,应用于复发性口腔溃疡的治疗,疗效比较满意,报道如下.

目的了解开封市12岁儿童恒牙龋发病情况.方法按照全国第二次口腔流行病学调查标准对随机抽取的1033名12岁儿童进行检查并记录.结果 12岁儿童恒牙患龋率为19.65%,龋均为0.32,已达到我国2000年口腔健康目标的要求.恒牙龋中,牙牙合面患龋率显著高于其他牙面,第一磨牙患龋率最高.结论儿童口腔保健知识普及较好,但有待于进一步加强.应重视对年轻恒牙的保护,建议推广应用窝沟封闭防龋并提高龋齿的充填率.