Читать книгу Feline Dentistry - Jan Bellows - Страница 39

Dental formulas (upper number indicates the maxillary teeth and the lower number the mandibular teeth) are as follows:

 The deciduous dental formula for kittens is 2 × (I3/I3, C1/C1, P3/P2) = 26 teeth.

 The permanent dental formula for adult cats is 2 × (I3/I3, C1/C1, P3/P2, M1/M1) = 30 teeth.

All of the incisors and canine teeth have one root. The maxillary second premolar, if present, normally has one root; however, studies have shown nearly 60% of the maxillary second premolars have two (sometimes partially fused) roots. The maxillary third premolar has two roots and the maxillary fourth premolar normally has three roots. The maxillary first molars, are single‐rooted in 35% of the cases, partly fused roots, in 35% of the cases and two roots in approximately 28% of the cases.

Figure 1.19 Cat model demonstrating normal tooth anatomy.

The mandibular cheek teeth in a cat (third and fourth premolars and first molars) normally have two roots Figure 1.19.

Figure 1.20 Modified Triadan system incisor tooth numbering.