Revolver bite
Revolver bit is the name given to the multiple row bit typical of sharks .
In sharks, the rootless teeth on the inside of the jaw constantly grow back, so that behind each front tooth in the dental arch there are several subsequent teeth ( seven in bull sharks ) in different stages of development. The teeth in the foremost rows stand vertically in the jaw, the rear ones are initially close and gradually straighten up in the course of their development, with the foremost tooth ultimately falling out. The heavily stressed shark bite breaks out more often individual teeth in the use stage; the gap does not last long because of the ongoing renewal.
Depending on the type of shark, the tooth change interval is eight days to a few months and is independent of each tooth position. An exception are the cigar sharks , where all teeth change at the same time.
Since sharks produce a large number of teeth because of their revolver teeth, fossil shark teeth are among the most frequently found fossils.
In parts of Oceania, shark teeth were used for shark tooth knuckles .