After treatment the changes of dental arch width in first and second premolar region were larger than that of cuspid and first molar regions. 上颌第一、二双尖牙间各自宽度较尖牙间、一磨牙间宽度增加显著。
cuspid
[ noun ] one of the four pointed conical teeth (two in each jaw) located between the incisors and the premolars <noun.body>
Cuspid \Cus"pid\ (k[u^]s"p[i^]d), n. [See {Cusp}.] (Anat.) One of the canine teeth; -- so called from having but one point or cusp on the crown. See {Tooth}.