An instrument used to determine measurements of an object, such as the bore of a needle. A Willis bite gauge is used to measure the vertical dimension during the construction of a complete denture; two measuring points are selected in the midline of the face, one related to the nose and one to the chin.
An undercut gauge is a device attached to a dental cast surveyor to measure the extent of the convexity of a tooth.
McCord J. F., Grant A. A. Registration: Stage II – intermaxillary relations. Br Dent J 2000;188;11:601–08.
Willis bite gauge