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Contra angles hold dental burs to place what?

A) Dental crowns
B) Fillings
C) Orthodontic appliances
D) Dental mirrors

Answer :

Final answer:

Contra angles in dental equipment hold dental burs which are used to prepare teeth for the placement of B) fillings, which are often made from an amalgam of silver and other metals.

Explanation:

Contra angles, which are parts of dental handpieces, are utilized to hold dental burs. These dental burs are primarily used for the preparation of teeth prior to the placement of fillings (Option B). The fillings themselves are often composed of an amalgam material, which is typically a blend of silver and other metals.

Amalgam has notable advantages including low cost, easy manipulation, and longevity compared to alternative materials. It’s worth mentioning that about 50% of dental amalgams are mercury by weight - a fact that in recent times has been a focus due to mercury's toxicity.

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