Where do the 2 extra PAs usually come from?

• A. Mandibular incisors
• B. Maxillary laterals or maxillary canines
• C. Mandibular molars
• D. Maxillary central incisors

Answer: (B)

The two extra PAs usually come from the maxillary anterior region, specifically the maxillary lateral incisors or the maxillary canines. These teeth sit adjacent to the central incisors and are the most likely to exhibit the developmental variations or attachments that PAs are describing, making them the common source for the two extra PAs. In contrast, mandibular incisors and molars are less often involved due to their different positional and morphological characteristics, and maxillary central incisors are central and more consistent, so they’re less likely to provide those extra PAs.