Headphones that go over your ears can also damage your hearing if you use them too long or play music too loudly. They're just not as much of a risk as earbuds are: Having the source of the sound in your ear canal can increase a sound's volume by 6 to 9 decibels â enough to cause some serious problems.
Dental hand instruments. Instruments used for examining the mouth and teeth. Mouth mirrors are used to examine the condition of the teeth and mouth, as well as to retract the tongue and cheeks upon examination. Probesâ There are many probes available but the main types are the straight probe, Briault probe and periodontal probe.
noun. 1 A tool or machine with a rotating cutting tip or reciprocating hammer or chisel, used for making holes. Example sentences. Synonyms. 1  Most of the project requires basic wood-working tools-a circular saw, a saber saw, an electric drill, a hammer, and a nail set..1 A tool with a rotating tip used by a dentist for cutting away part of a tooth before filling it. Example sentences. 1  Your dentist will remove any decay or old filling from the tooth with a drill. 2  Some of the surrounding bone can then be removed with a drill to lift the tooth out in one piece.