Galvayne's groove

Galvayne's groove

a vertical goove in the labial surface of the upper corner incisor tooth in the horse. It appears at the gum margin at 10 years of age, is halfway to the end of the tooth at 15 years, has reached the end at 20 years, has disappeared from the top of the tooth at 25 years and has disappeared completely at 30 years. The ages quoted are subject to variation.
References in periodicals archive ?
The distal end of Galvayne's groove may be visible at the margin of the gum on the upper corner incisors (Figure 9-3).
The distal end of Galvayne's groove should be visible on the upper corner of the upper incisor.
Galvayne's groove extends halfway down the labial (the surface of the tooth closest to the gums) surface of the upper corner incisors.
Galvayne's groove extends down the entire length of the labial surface (the surface of the tooth closest to the gums) of the upper corner incisors.