Table I.

The frequency of bone loss in 4 selected teeth (premolars 3 [P3] and 4 [P4] and molars 1 [M1] and 2 [M2]) of commercially bred blue color type mink examined for periodontal disease (n = 289). Through the use of radiographs, bone loss was assessed in 4 teeth from 1 randomly chosen half of the mandible from each mink. The frequency was presented as the percentage of each individual tooth, categorized as affected by mild to moderate bone loss (up to 50% alveolar bone loss) or severe bone loss (more than 50% alveolar bone loss)

Teeth	No bone loss	Mild to moderate bone loss	Severe bone loss	Tooth loss	Total % diseased teeth
P3	70.59	18.34	6.23	4.84	24.57
P4	62.98	24.91	8.65	3.46	33.56
M1	62.28	32.18	4.15	1.38	36.33
M2	13.84	69.90	5.19	11.07	75.09