展示了乳恒牙交替时期乳牙与恒牙的位置关系,因乳牙过早脱落导致的过大间隙以及为过大间隙而制作不同的间隙保器。
Mixed dentition model completely transparent.
Edentulous in 2nd bicuspid areas on the upper
arch with crown and loop on one side only,
opposite side shows the effects of early missing
tooth without space maintenance.lower portion:
both 1st and 2nd primary bicuspids edentulous
with removable flipper. |