Sim T P
School Dental Service, Ministry of Health, Singapore, Republic of Singapore.
Endod Dent Traumatol. 1996 Jun;12(3):137-40. doi: 10.1111/j.1600-9657.1996.tb00112.x.
Dens evaginatus (DE) is an odontogenic anomaly characterized by an enamel covered tubercle, enclosing dentin and pulpal tissue. It most commonly affects premolar teeth of people of mongoloid ethnicity. The prevalence of DE in Singapore is 2.1%. Fracture or attrition of the tubercle may lead to pulpal necrosis. Thus, prophylactic management of DE is preferred. A retrospective cohort study comparing two common prophylactic restorative methods was conducted. This involved 817 children, aged 10 years at the outset, having 1591 DE. The teeth were observed for 2 years. The results showed that significantly less teeth developed pulpal pathology when an enamoplasty-preventive resin restoration method was used (0.52%) as compared to an amalgam cavity restoration (5.37%) and the control (3.65%) [chi 2 = 9.595 (p < 0.01) df = 2]. Knowledge of the various treatment options and prevalence data is important as there is an increasing global migration of people of mongoloid ethnicity.
牙内陷（DE）是一种牙源性异常，其特征为有一个覆盖釉质的结节，包绕着牙本质和牙髓组织。它最常累及蒙古人种的前磨牙。在新加坡，牙内陷的患病率为2.1%。结节的折断或磨损可能导致牙髓坏死。因此，牙内陷的预防性处理更为可取。开展了一项回顾性队列研究，比较两种常见的预防性修复方法。该研究纳入了817名儿童，初始年龄为10岁，共有1591颗牙内陷患牙。对这些牙齿进行了2年的观察。结果显示，与汞合金洞形修复（5.37%）和对照组（3.65%）相比，采用牙釉质成形术 - 预防性树脂修复方法时，发生牙髓病变的牙齿显著更少（0.52%）[卡方 = 9.595（p < 0.01），自由度 = 2]。由于全球范围内蒙古人种的迁移不断增加，了解各种治疗选择和患病率数据很重要。
