The 2nd common most supernumerary teeth is
**Core Concept**
Supernumerary teeth are additional teeth that occur in addition to the normal complement of teeth in the human mouth. They can be classified into different types based on their morphology and location, and are often associated with various dental and skeletal anomalies.
**Why the Correct Answer is Right**
The second most common type of supernumerary teeth is the mesioangular supernumerary tooth, also known as a mesio-superior supernumerary tooth. This type of supernumerary tooth occurs between the maxillary central incisors and is thought to be a result of an abnormality in the development of the dental lamina. The mesioangular supernumerary tooth can cause crowding and malposition of adjacent teeth, and may require surgical removal to prevent orthodontic complications.
**Why Each Wrong Option is Incorrect**
**Option A:** The maxillary lateral incisor supernumerary tooth is a rare type of supernumerary tooth and is not the second most common type.
**Option B:** The distoangular supernumerary tooth is a type of supernumerary tooth that occurs between the maxillary central incisors, but is not the second most common type.
**Option C:** There is no such thing as a "mesio-distal supernumerary tooth", making this option an obvious distractor.
**Clinical Pearl / High-Yield Fact**
Supernumerary teeth can be associated with various systemic conditions, including cleidocranial dysplasia and Gardner syndrome, and may require a multidisciplinary approach to management.
**Correct Answer:** C.