In my experience, not all horses will display obvious signs of discomfort when they need dental attention. Some will show no signs at all whereas others will show obvious discomfort at the mere thought of a sharp point!
Just because your horse does not show signs of discomfort does not mean he doesn't need dental attention!
Some common signs of dental problems include the following:
Ridden problems -
Head tossing
Bolting/rushing
Rearing
Bucking
Refusing to go forward
Head tilting/leaning
General poor/inconsistent performance
Rein snatching
Other problems -
Quidding (dropping food)
Refusing/slow to eat
Biting
Difficulty tacking up
Dropping weight
Bad breath
Facial sensitivity
General unhappy behaviour
These are a few of the common problems but there can be other indicators too. As an owner/rider you know your horse and anything out of the ordinary which causes concern should be investigated. Dentistry is one of many areas which can cause discomfort but can be easily identified and treated effectively.
Below are just a handful of the problems I have encountered
Large rostral hooks on these molar teeth (red arrows) and the bottom picture is after treatment. This horse had no outward signs of any issues but it would definitely cause restricted movement of the jaw, during eating and when ridden.
After identifying a cavity in this tooth, it was referred to the vets for filling. These fillings last years but need regular checking to make sure they stay in place.
Development of a fracture of an incisor tooth. After discussion with the vet, it was decided to monitor any changes. Years on, its still looking good and not causing any problems.
Calculus/tartar build up before (left) and after removal (right) on canine teeth can lead to trapped food and inflammation of the surrounding tissues. It a simple process to remove and one of our most satisfying treatments.
Sharp canine tooth fragment removed from a gelding.
No outward signs of ill health but this pony had a number of dental issues preventing her from eating properly! The hook you can see there was just the start but she's fine now.
Retained deciduous cap removed from a 5 year old. These can route in place or be mobile btu defintely cause discomfort.
Direct trauma caused by an accident in a trailer has caused fractures to this horses incisors. Radiographs have shown the damage is superficial so regular check ups to keep an eye on how things develop are on the cards for now.
An accident as a foal left this horse with permanent missing incisors. Long term she can eat fine but needs regular check ups to keep her teeth fully functional.