A FORM of parodontal disease has been previously described, in which the initial lesion of the gum was caused by the impingement and eventual penetration of salivary calculus 1,2. Both tartar ...

The enamel of freshwater crayfish is heavily fluoridated by nature The mandibles of the freshwater crayfish are part of the cuticle which, as in other crustaceans, consists essentially of a ...

ACC is widely used in crustacean cuticles, presumably because of its ... combining a highly crystalline apatite cap, reminiscent of enamel, covering a chitin scaffold reinforced with amorphous ...