Which areas are classified as keratinized mucosa?

Keratinized mucosa refers to areas of the oral cavity where the epithelium is keratinized, providing a protective barrier against mechanical abrasion and pathogens. The gingiva and hard palate are specifically classified as keratinized mucosa due to their structure composed of densely keratinized stratified squamous epithelium. This type of mucosa is essential in areas that experience higher levels of friction and trauma, such as during chewing and other oral functions.

In contrast, other areas such as the lining mucosa of the soft palate, floor of the mouth, and buccal mucosa contain non-keratinized stratified squamous epithelium, which is softer and more pliable to accommodate functions like speech and deglutition without the same level of abrasion stress. These areas are not exposed to the same mechanical wear as the gingiva and hard palate, which is why they do not fall under the classification of keratinized mucosa.