目的:评价思维导图教学法在儿童口腔临床带教的应用效果.方法:选择2018年1月-12月入我院儿童口腔科轮转的40名学员,随机分为实验组(n=20)和对照组(n=20),对照组采用传统带教方法,实验组采用思维导图辅助教学.两组学员轮转前后均进行考试,轮转结束后对学员进行访谈.结果:两组学员在轮转前的成绩无显著性差异.轮转结束后,两组学员的成绩均有提高,实验组学员成绩提高相对较多,但无显著性差异.访谈结果表明,实验组学员对学习展现更高的积极性,并对教学方式更加认可.结论:思维导图能提高学员对教学内容的记忆与掌握,提高学习积极性,为临床带教提供新的教学思路与方法.

Objective To compare the clinical effect and patient satisfaction between reattachment of permanent anterior teeth using dual-cured resin and esthetic light-cured resin in crown fracture permanent anterior teeth.Methods180 crown fracture permanent anterior teeth of 148 patients were divided into two groups. In experimental group, 82 permanent anterior teeth, which had intact incisal edge segments, were reattached by dual-cured resin. In control group, 98 permanent anterior teeth, which segment were lost, were restored with esthetic light-cured resin. Cases were assessed clinically by two year's followed up.Results The success rate was 64.86% in experimental group and 54.54% in control group after two year's follow up(P<0.05) .The patient satisfaction was 8.65±1.31 in experimental group and 6.98±1.45 in control group after two year's follow up(P<0.05).Conclusion The clinical effect of reattachment with dual-cured resin to treat anterior crown fracture is superior to restore with esthetic light-cured resin.

畸形中央尖是一种牙体形态发育畸形,口腔中表现为牙齿(牙合)面颊舌尖中间或接近中央窝的颊尖三角嵴上突出一圆锥状的额外牙尖,最多出现于下颌第二前磨牙,偶发于上颌前磨牙或上颌第二磨牙[1],多呈对称性分布,50％中央尖有髓角伸入[2].畸形中央尖的发生是由于在牙胚发育期间牙乳头在中央窝处向成釉器突起而形成牙尖畸形,影响因素包括牙胚生长发育时期的遗传因素和外来因素等.其发生率为1％～5％[3],女性高于男性.

上颌第一恒磨牙位于牙弓后段,髓腔解剖结构复杂,根管治疗难度大,其根管治疗的失败往往由于近中颊根第二根管(MB2)的漏治引起[1].因此,了解上颌第一磨牙近中颊根根管系统的复杂性是根管治疗成功的关键[2-4].目前国内外已有许多关于上颌第一磨牙近中颊侧根管根管形态学的体内外研究[5-9],本文就其研究进展综述如下.

The root canals of 95 maxillary second primary molars were explored by 10#file combined with 17%EDTA.The canal orifice was observed and orientated by endoscope.Hand instruments were used for root canal preparation and screw conveyor was used to fill the ca-nal with Vitapex paste.MB2 was found in 14 of the 95 molars(14.7%).MB2 orifice was usually located mesially along MB-P.