Powell R N, McEniery T M
Community Dent Oral Epidemiol. 1981 Feb;9(1):32-6. doi: 10.1111/j.1600-0528.1981.tb01025.x.
An investigation of disparate gingival heights of the mandibular central incisor region in 93 children aged from 6 to 12 years was undertaken. Unaffected paired teeth demonstrated an age-associated increase in clinical crown length, similar to previous reports, suggesting a gradual remodelling of soft tissues. Affected teeth displayed a rapid increase in clinical crown length suggesting that by age 10 years true recession had occurred. Significant associations with gingival inflammation (at the 0.1% level), and with anterior crowding (at the 0.2% level), occurred. Frenal involvement did not influence the position of the gingival margin.
对93名6至12岁儿童下颌中切牙区域牙龈高度差异进行了调查。未受影响的配对牙齿显示临床牙冠长度随年龄增加，与先前报道相似，提示软组织逐渐重塑。受影响的牙齿临床牙冠长度迅速增加，表明到10岁时已发生真性牙龈退缩。与牙龈炎症（在0.1%水平）和前牙拥挤（在0.2%水平）存在显著关联。系带累及不影响牙龈边缘位置。
