<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">dental drills</topic></authority><related type="broader"><topic>dental instruments</topic></related><related type="broader"><topic>drills by form</topic></related><variant type="other"><topic>dental drill</topic></variant> <note xml:lang="en"><![CDATA[ Rotary instruments used to remove tooth substance, particularly in the treatment of caries. Historically, the drill was hand-operated or pedal-driven. Modern dental drills operate by an electric motor; they consist of a dental handpiece that may be fitted with variously shaped burs. ]]></note></mads>