Peg lateral incisors describes a condition where the second tooth on either side of the upper front teeth (tooth number 7 & 10 - Universal Tooth Numbering System) does not develop correctly and is small, often pointed, and looks like a cone. Sometimes, the permanent adult teeth do not develop at all, leaving only the baby teeth or primary teeth in place. While some people refer to these teeth as peg laterals, a true peg lateral incisor is a term reserved for the under-developed adult permanent t

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Dental Terminology - Tooth Naming & Numbering Explained