The phrase "cheek teeth" refers to the back teeth in our mouth, specifically the molars and premolars. They are called cheek teeth because they are located towards the back of our mouth, near our cheeks. Full definition
The points cut into the soft tissues of the cheeks and tongue and give rise to the signs of cheek tooth malocclusion: drooling, tooth - grinding and reluctance to eat. (smallanimalchanel.com)