• laminate veneer – thin material, generally tooth-colored, used to cover the front of a healthy tooth to restore the appearance from discoloration, damage, misalignment, or other such cosmetic issues
  • laughing gas – a common term used for nitrous oxide, an odorless gas that produces a mild sedative effect when inhaled
  • lesion – tissue injury, generally due to trauma, infection, or¬†illness
  • ligation – the process of attaching an archwire to braces in orthodontic treatment
  • ligature – thin wire used to hold the archwire in the bracket in orthodontic treatment
  • lingual – refers to area or surface on or around the tongue, opposite of facial
  • lip bumper – archwire attached to a piece of molded plastic, holds back molars of lower jaw to provide more space for the other teeth
  • local anesthesia – medication used to block nerve impulses to provide partial or complete elimination of pain during treatment