A gnathodynamometer is an instrument for measuring the force exerted in closing the mouth. A bimeter gnathodynamometer is one with an adjustable central-bearing point.

As per the inventor's design study, the instrument works well "in measuring maximal bite force and masticatory efficiency of incisor

Incisor

Incisors are the first kind of tooth in heterodont mammals. They are located in the premaxilla above and mandible below.-Function:...

 and molar teeth

Molar (tooth)

Molars are the rearmost and most complicated kind of tooth in most mammals. In many mammals they grind food; hence the Latin name mola, "millstone"....

, respectively."

Shark

Shark

Sharks are a type of fish with a full cartilaginous skeleton and a highly streamlined body. The earliest known sharks date from more than 420 million years ago....

s are baited into biting hard plastic sheets, which are brought to the laboratory. The depth of the indentations shows the force of the bite. The inventor is J. N. Snodgrass.

Please expand article with

• http://www.elasmo-research.org/education/topics/r_bites.htm
• http://animal.discovery.com/convergence/safari/shark/expert/expert14.html