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长春地区位于东北松辽平原,盛产葵花籽;本地区人群中嗑食葵花籽者很普遍。由于长期嗑食葵花籽造成了前牙切端的磨损,在切端形成特异性缺损,现将本症调查报告如下:
Changchun area is located in the northeastern Songliao Plain, rich in sunflower seeds; people in the region eating sunflower seeds are common. Due to long-term feeding sunflower seeds caused by the wear of the incisor incision in the cut end to form a specific defect, the disease is now surveyed as follows: