Northway W M, Wainright R W
J Dent Res. 1980 Oct;59(10):1577-80. doi: 10.1177/00220345800590100401.
By using only a portion of the dental arch, rather than some geometric construction that conforms to the dental arch, more pertinent information can be gathered regarding the sequelae of some event or insult to the arch. The measurement, D E Space, has been explained and utilized to describe the effectss of unattended dental caries on arch form. Only caries which become severe have a significant effect on the dental arch--a reduction in D E Space, which can be interpreted as relative arch length (depth) and is significant only for the year after its exfoliation. This occurs one year early and is also significant.
通过仅使用牙弓的一部分，而不是符合牙弓的某种几何构造，可以收集到更多关于牙弓受到某些事件或损伤后遗症的相关信息。已经对“DE 间距”这一测量方法进行了解释并用于描述未治疗龋齿对牙弓形态的影响。只有严重的龋齿才会对牙弓产生显著影响——DE 间距减小，这可解释为相对牙弓长度（深度），并且仅在乳牙脱落一年后才有显著意义。这种情况提前一年出现且也具有显著意义。
