Equine dentistry is about more than just filing off sharp points. It involves a thorough oral examination (under sedation), balancing the dental arcades and incisors, and addressing any problem teeth. We ask a lot of our horses when we ride them, and it is only fair to provide them with a comfortable mouth.
There have been many advances in equine dentistry over the years, and our ability to address dental issues is remarkable. I encourage you to be proactive regarding equine dentistry, and not to wait until your horse has a painful mouth or is losing weight. Many problems can be identified and resolved before your horse shows any outward signs.
Additionally, young horses going into training should have a thorough oral exam, and float if needed, to get the most out of their training experience (and so that the you get the most out of your training fees).