Why was continuous tooth eruption and replacement a necessity for *Xenoceratops* survival?

Answer

Constant grinding against tough, silica-rich plants caused rapid wear.

The constant grinding against tough, silica-rich plants, such as ferns, meant the teeth wore down quickly, requiring continuous eruption to maintain chewing surface.

Why was continuous tooth eruption and replacement a necessity for *Xenoceratops* survival?
dietpaleontologydinosaurherbivoreXenoceratops