Age-Related Changes in Lip Morphological Characteristics in Japanese Women

Abstract

The main trouble of the lips is “dryness and chapping”, but the trouble of the lips changes with aging. That is, these troubles are reduced after peaking in subjects' 30s, and troubles concerning color and shape increase with aging. However, there are few reports on age-related changes in lip shape, and it is not clear how it changes. We focused not only on the red part which is usually called the lips, but also on the surrounding white lips which are thought to have a great influence on the aged impression, and examined them by measuring from front and side photographic images. As a result, it became clear that the white lips part became longer with aging and became more rounded. Furthermore, it quantitatively clarified that the length of the red lips part became thin and the width became wider, and that the swelling of the lower lip as seen from the side decreased. It also became clear that these many shape changes occurred remarkably at the age of over four decades. We also confirmed that similar age-related changes occurred in the same subjects, and also verified that it was due to age-related changes rather than individual differences.