McCulloch K J, Mills C M, Greenfeld R S, Coil J M
South Tower Oakridge Centre, Vancouver, B. C., Canada.
Am J Orthod Dentofacial Orthop. 1997 Dec;112(6):670-5. doi: 10.1016/s0889-5406(97)70233-6.
The anomaly of dens evaginatus manifests itself as an innocuous-looking tubercle of enamel on the occlusal surface of a premolar tooth. Problems can arise when the tubercle is either worn, ground, or fractured off, resulting in pulpal exposure and possible loss of vitality of the tooth. Orthodontists should be particularly aware of this dental anomaly, which occurs in at least 2% of the Asian and Native Indian population. Premolar extraction cases should be planned to include extraction of the anomalous premolars instead of the normal ones. In addition, the orthodontist should be wary of occlusal changes during treatment or occlusal equilibration that might jeopardize the vitality of teeth with dens evaginatus. Pulp-capping or partial pulpotomy has been postulated as the most reliable form of treatment to prevent loss of vitality of the affected teeth and to allow continued root maturation where necessary.
畸形中央尖表现为前磨牙咬合面上一个看似无害的釉质结节。当结节被磨损、磨除或折断时，就会出现问题，导致牙髓暴露，牙齿可能失去活力。正畸医生应特别注意这种牙齿异常情况，在亚洲人和印度原住民中至少有2%的人会出现这种情况。在计划拔除前磨牙的病例中，应安排拔除异常的前磨牙而非正常的前磨牙。此外，正畸医生在治疗过程中或进行咬合平衡时应警惕可能危及有畸形中央尖牙齿活力的咬合变化。牙髓盖髓术或部分牙髓切断术被认为是预防患牙失去活力并在必要时使牙根继续发育成熟的最可靠治疗方式。
