This article reviews about the definition of ectopia and impaction ; the development of maxillary canine ; etiology , occurrence , assessment and treatment of impacted canine 本篇报告回顾上颚未萌出异位及阻生犬齿的定义、生长发育、阻生及未萌出的原因、发生率、评估方法及临床治疗等之相关文献。
英文解释
abnormal position of a part or organ (especially at the time of birth)
百科解释
In medicine, an ectopia is a displacement or malposition of an organ or other body part. Most ectopias are congenital, but some may happen later in life.