Anterior arch width of the dental arches increases upto the age of:
**Core Concept**
The anterior arch width of the dental arches is a significant indicator of dental development and occlusion. It is influenced by the eruption of permanent incisors and the growth of the alveolar bone. The increase in anterior arch width is a crucial factor in the development of a harmonious occlusion.
**Why the Correct Answer is Right**
The anterior arch width continues to increase until the late mixed dentition stage, which is around 12-13 years of age. This increase is mainly due to the eruption of the permanent incisors, particularly the central incisors, which contribute significantly to the anterior arch width. The growth of the alveolar bone also plays a role in this increase.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the anterior arch width does not stop increasing at 8 years of age. The eruption of the permanent incisors continues beyond this age.
**Option B:** This option is incorrect because the anterior arch width does not stop increasing at 10 years of age. The growth of the alveolar bone and the eruption of the permanent incisors continue beyond this age.
**Option D:** This option is incorrect because the anterior arch width does not stop increasing at 14 years of age. The growth of the alveolar bone and the eruption of the permanent incisors continue beyond this age.
**Clinical Pearl / High-Yield Fact**
The increase in anterior arch width is a crucial factor in the development of a harmonious occlusion. A harmonious occlusion is essential for proper mastication, speech, and aesthetics.
**Correct Answer:** C. 12-13 years of age.