Stanley H R, Collett W K, Hazard J A
College of Dentistry, University of Florida, Gainesville, USA.
ASDC J Dent Child. 1996 Mar-Apr;63(2):123-30.
A case is reported of a retained maxillary primary canine that functioned effectively over fifty years. At the time of exfoliation the tooth was still of normal length and was lost not because of ankylosis and root resorption, but because of periodontal disease. Excellent histological preservation of the specimen at the time of exfoliation, together with a very complete clinical history, permitted the development of a detailed description of a tooth and its dying pulp while under function over a long period of time.
报告了一例上颌乳尖牙滞留长达五十多年且功能良好的病例。该牙脱落时长度仍正常，其脱落并非由于牙根粘连和吸收，而是由于牙周疾病。脱落时标本的组织学保存良好，加上非常完整的临床病史，得以详细描述一颗牙齿及其在长期行使功能时牙髓的变化情况。
