Which tooth is identified as the most common supernumerary tooth?

Which tooth is identified as the most common supernumerary tooth?

• A. Mandibular premolars
• B. Mesiodens
• C. Maxillary first molars
• D. Maxillary lateral incisors

Answer: (B)

The most common extra tooth is a mesiodens, the small tooth that appears between the two upper central incisors in the maxillary midline. This sits in a region where the dental lamina is especially prone to producing an additional tooth bud, so it occurs more frequently than supernumeraries in other areas. Clinically, a mesiodens often presents as a peg-shaped or conical tooth that can block eruption of the central incisors or create a midline gap, which is why detecting it early matters for planning. While extra teeth can occur in other locations—such as in the lower jaw near the premolars, or as an uncommon extra upper molar, or as a supplemental lateral incisor—the midline maxillary location is by far the most common site. If the mesiodens isn’t causing problems, it may be monitored; if it disrupts eruption or alignment, extraction is usually considered.

The most common extra tooth is a mesiodens, the small tooth that appears between the two upper central incisors in the maxillary midline. This sits in a region where the dental lamina is especially prone to producing an additional tooth bud, so it occurs more frequently than supernumeraries in other areas. Clinically, a mesiodens often presents as a peg-shaped or conical tooth that can block eruption of the central incisors or create a midline gap, which is why detecting it early matters for planning. While extra teeth can occur in other locations—such as in the lower jaw near the premolars, or as an uncommon extra upper molar, or as a supplemental lateral incisor—the midline maxillary location is by far the most common site. If the mesiodens isn’t causing problems, it may be monitored; if it disrupts eruption or alignment, extraction is usually considered.