Ageing of the craniofacial skeleton is not merely the result of bone atrophy, but is also due to a change in the relative dynamics of bone expansion and bone loss. There is an appreciable reduction in facial 1., which is mainly due to changes in the maxilla and mandible, and a modest 2. in facial width and depth. The 3. increase in size, whereas the 4. decreases in size, compounding the inferior displacement of the malar fat pad and accentuation of the nasolabial fold. Maxillary 5. can also lead to a loss of support in the upper lip, which contributes to 6. Wrinkling.