This image may not be used to state or imply the endorsement by the BDA of any product or service, nor in any use associated with any political opinio

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This image may not be used to state or imply the endorsement by the BDA of any product or service, nor in any use associated with any political opinion, activity or in any advocacy that conflicts with the BDA's scientific policies. Borden Alston air rotor dental unit, developed in the 1950s and used air pressure to turn the burr. The drill could achieve 250 000 rpm, cooled down by water in the glass container, and operated by foot. Dated 1959.

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Size: 3425px × 5138px
Photo credit: © BRITISH DENTAL ASSOCIATION MUSEUM/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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