Eruption date of deciduous maxillary 2nd molar is:
**Core Concept**
The eruption date of deciduous teeth varies among individuals and populations, but can be generally predicted based on age and anatomical development. The eruption time of deciduous maxillary second molars is influenced by the maturation of the tooth germ and the surrounding bone structure.
**Why the Correct Answer is Right**
Deciduous maxillary second molars erupt between the ages of 12-16 years, with the average age being around 13-14 years. This is due to the prolonged development time of the tooth germ, which requires a longer period of root formation and crown mineralization. The eruption of these teeth is also influenced by the availability of space in the dental arch and the overall growth pattern of the jaw.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is too early, as the eruption of deciduous maxillary second molars typically occurs after the first molars.
**Option B:** This option is too late, as the eruption of these teeth usually occurs before the age of 18 years.
**Option C:** This option is incorrect, as there is no clear consensus on the eruption time of deciduous maxillary second molars at this age range.
**Clinical Pearl / High-Yield Fact**
The eruption time of deciduous teeth can vary significantly among individuals, making it essential to assess each patient's dental development on a case-by-case basis. A thorough dental examination and radiographic evaluation can help determine the correct eruption time for each tooth.
**Correct Answer: D. 12-16 years.