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• laminate
  

  laminate thin plastic or porcelain veneer produced in a dental laboratory and then bonded to a tooth

• laughing gas
  

  laughing gas nitrous oxide odorless inhalation agent that produces relative analgesic (sedation) reduces anxiety and creates a state of relaxation

• lesion
  

  lesion injury of bodily tissue due to infection, trauma or neoplasm

• local anesthesia
  

  local anesthesia partial or complete elimination of pain sensation, in the immediate vicinity of its application or injection