Illustration of Dentition for Cattle Aged 30 Months or Older
Illustrations are read from right to left. All illustrations show the frontal aspect of a bovine mandible aged 30 months or older.
The first illustration represents the first set of permanent incisors. On its left, we observe an erupting third permanent incisor, top of tooth above the gum, meaning the animal is 30 months of age.
The second illustration represents the first set of permanent incisors. On its right, we observe an erupting fourth permanent incisor. On its left, an erupting third permanent incisor with top corners of the tooth above the gum, meaning the animal is 30 months of age or older.
The third illustration represents the first four permanent incisors. The first set is fully erupted and the second set (left and right) have top corners above the gum. The animal is 30 months of age or older.
The fourth illustration represents a full set of permanent incisors. The animal is over 48 months of age.
The fifth illustration represents the medial incisors (first permanent incisors [left and right]) showing wear and levelled tops. The animal is 72 months of age.
The sixth and last illustration represents permanent incisors showing wear and space between the teeth. The animal is 120 months or older.