Dental Measuring Instruments: Calipers, Gauges and Bite Gauges

Accurate measurement underpins good dentistry — from sizing a wax pattern to setting the height of a denture or measuring an implant site. A range of dental measuring instruments makes this quick and reliable. Here's an overview of the main types.

Sliding calipers

Sliding (vernier-style) calipers such as the Boley gauge and Krekler caliper measure distances, widths and thicknesses with a moving scale. They are used throughout the laboratory and clinic for precise, repeatable measurements.

Spring thickness gauges

The Iwanson spring caliper is designed to measure the thickness of wax patterns, metal copings and crowns. Its spring-loaded jaws and dial make it a staple for checking that restorations meet minimum thickness requirements.

Precision surgical calipers

The Castroviejo caliper is a fine precision instrument used in surgery and implantology to measure small distances accurately — available in straight and curved forms with short or long scales.

Bite gauges and rulers

The Willis bite gauge measures the facial (vertical) dimension of occlusion, helping establish the correct vertical dimension when constructing dentures. Endodontic rulers and file gauges measure and set the working length of root canal files, and simple stainless steel rulers cover general measurement.

Material and care

Most measuring instruments are stainless steel for durability and autoclaving; some colour-coded endodontic rulers use anodised aluminium. Keep scales clean and legible, and check that sliding and spring mechanisms move freely.

Dental Expert supplies calipers, gauges and measuring instruments to dentists, surgeons and laboratories across Italy and Europe.