Extra roots are usually found on which teeth?

• A. Maxillary canines
• B. Mandibular primary second molars
• C. Maxillary premolars
• D. Mandibular incisors

Answer: (B)

Extra roots, or supernumerary roots, are most commonly associated with the mandibular primary second molars. This phenomenon occurs due to variations in the developmental patterns of these teeth, which can lead to the presence of an additional root or roots.

The anatomical structure of mandibular primary second molars typically includes two roots; however, in certain individuals, a third root may develop. This can be attributed to the complex nature of dental development in primary teeth, as they often exhibit more variability compared to permanent teeth. Understanding this is particularly important in pediatric dentistry since it can influence treatment planning, root canal therapy, and extraction procedures.

In contrast, while other teeth listed may also have anatomical variations, they are less commonly associated with extra roots. For example, maximum premolars can exhibit additional roots, but it is not as prevalent as in the case of mandibular primary second molars. Mandibular incisors and maxillary canines typically have predictable root anatomy and are less likely to present with supernumerary roots. Therefore, recognizing the mandibular primary second molar as the most likely candidate for extra roots is essential for pediatric dental practitioners when assessing and managing these teeth.