LOSING OF TEMPORARY TEETH
According to the observation of Mayo, the temporary incisors are replaced by permanent teeth as follows: “The two central incisors are shed at about two and a half years, and the permanent ones are up ‘in wear’ at three years. The lateral incisors are shed at three and a half and the permanent ones are up and in wear at four years. The corner incisors are shed at four and a half and the permanent ones are up and in wear at five.
“The molars are erupted and replaced as follows: The fourth molar on each jaw (which is always a permanent molar) is erupted at ten to twelve months; the fifth permanent molar at two to two and a half years, and the sixth usually at four and a half to five. The first and second molars, which are temporary, are shed and replaced by permanent ones at two to three years of age. The third temporary molar is replaced by a permanent one at three and a half years. In males, the canine or bridle teeth are erupted at about four and a half years of age. At about five years of age a horse is said to have a full mouth of permanent teeth.”