Classification and Structure of Oral Mucosa
- Oral mucosa can be divided into three main categories based on function and histology: lining mucosa, alveolar mucosa, and masticatory mucosa.
- The oral mucosa consists of two layers: the surface stratified squamous epithelium and the deeper lamina propria.
- Keratinised oral mucosa has four layers: stratum basale, stratum spinosum, stratum granulosum, and stratum corneum.
- Nonkeratinised epithelium covers the soft palate, inner lips, inner cheeks, floor of the mouth, and ventral surface of the tongue.
- Keratinised squamous epithelium is present in the gingiva, hard palate, and areas of the dorsal surface of the tongue.

Functions of Oral Mucosa
- The oral mucosa fulfills several functions, including protection, support during mastication, mobility during chewing and talking, and secretion of saliva.
- Saliva, the primary secretion of the oral mucosa, has various functions such as pH buffering, lubrication, antimicrobial activity, and initial digestion of carbohydrates.
- The oral mucosa is richly innervated and involved in sensations, including taste perception.
- The oral mucosa is not significant in thermal regulation in humans.

Clinical Significance of Oral Mucosa
- Infective conditions in the oral mucosa are often caused by human herpes viruses and can present with different oral manifestations.
- Autoimmune conditions, hypersensitivity reactions, and traumatic conditions can affect the oral mucosa, leading to various oral lesions and disorders.
- Oral mucosal lesions can result from irritation, fibroma, epulides, papillary hyperplasia, oral thrush, and idiopathic conditions like recurrent apthous stomatitis.
- Benign soft tissue neoplasms and malignant neoplasms, including sarcomas, can also occur in the oral mucosa.

Related Topics
- Oral mucosa tissue engineering is an area of research focused on creating artificial oral mucosa for various applications.
- Junctional epithelium, oral cancer, salivary glands, basal lamina, and fibroblasts are closely associated with the oral mucosa.

Diagnosis, Treatment, and Importance of Oral Mucosa
- Diagnosis of oral mucosal disorders involves clinical examination and may require biopsy for histopathological evaluation.
- Treatment options for oral mucosal disorders depend on the specific condition and may include medications, topical agents, and good oral hygiene practices.
- Regular dental check-ups are important for detecting oral mucosal abnormalities early.
- The oral mucosa plays a crucial role in maintaining oral health by acting as a barrier, producing saliva, and contributing to overall oral function.