Boxplots of 20 ISO parameters that differed significantly among the studied populations using either M1 or M2. (A) Parameters related to height and volume.

(B) Parameters related to other textures. All parameters differed significantly between the stall-fed and Wild (L) populations and six parameters differed significantly between the two wild populations. No parameter differed significantly between the stall-fed and Wild (S) populations. The results of statistical comparisons and the description of each ISO parameter are presented in Table 4. The box encloses the 25th and 75th percentiles, with the horizontal line representing the median. Outliers (open circles) are 1.5 times greater than the extreme end of the interquartile range. When ISO parameters were obtained from several teeth in the same individual, the parameters of the tooth that erupted earlier were used.