In addition to poor oral and dental hygiene (see Homecare/Prophylaxis ), misaligned teeth also contribute to the early development of dental disease. Adult dogs typically have 42 teeth, cats 30. If these teeth have no room in the mouth due to a short skull shape (brachycephalic breeds such as French Bulldogs, Pugs, Shi-Tzu, etc.) or because there are more than 42 teeth (supernumerary teeth), they rotate and come extremely close together (crowding). As a result, there is no intact neck of gum around the entire tooth, and in some cases, the roots of the teeth are never anchored in the bone but only covered by gum. Food residues, foreign bodies, and bacteria quickly get stuck between the gumless teeth and get directly onto the bone, where they cause early periodontitis.
Misaligned teeth due to a too-short upper jaw (malocclusion grade 3): This results in the dog biting into the lower jaw with the upper incisors. This biting causes pain and inflammation when eating, which, in the long term, damages the lower jaw bone and the lower incisors.
Supernumerary incisors and a discolored, avital incisor can also be seen.
© by Vets4Pets AG
Crowding and rotations, as well as additional supernumerary teeth
© by Vets4Pets AG
Dogs and cats are born toothless, but the foundations for milk and permanent teeth are already present in the jaw at birth.
A puppy's complete set of milk teeth, totaling 28, usually emerge between 3-12 weeks. The transition to permanent dentition, with a total of 42 teeth, typically begins at 3 months and should be finalized by 7 months. However, the duration of this process can vary among different dog breeds, with larger breeds often completing the teeth change earlier than smaller ones.
The complete deciduous dentition of a kitten consists of 26 teeth. These usually penetrate through the gums at 2-6 weeks. When they reach the age of 3 months, the change of teeth to the definitive dentition begins. This change is usually completed in 6-7 months.
The permanent teeth emerge on the inside/tongue side of the milk teeth, causing the root of the milk tooth to dissolve and it falls out. However, if the root of the milk tooth does not dissolve, both the permanent tooth and the milk tooth can be seen side by side, a condition known as a persistent deciduous tooth. This can lead to malocclusion, periodontitis, and even pain when biting into the palate. Regular dental checks, either by you as the pet owner or a specialist vet, are crucial to identify and address persistent milk teeth in a timely manner.