Labial: Anatomy, Function, and Clinical Significance
Labial anatomy, function, and clinical significance are important considerations for the dental clinician. The labial surfaces of the teeth are the most visible to the patient and often the most clinically relevant. In this article, we will discuss the anatomy of the labial surfaces, their function, and their clinical implications.
Anatomy
The labial surface of a tooth is the outer surface that is seen when a person is facing the front of the mouth. It is located facial to the gingiva and extends from the gingival margin to the incisal edge. The labial surface consists of enamel and dentin, which form the crown of the tooth. The enamel is the hard, outermost layer of the tooth and helps to protect the dentin from abrasion and infection. The dentin is the softer layer of the tooth and provides support to the enamel. The labial surface of the tooth is typically curved, however, some teeth may have a flat labial surface.
Function
The labial surface of the tooth serves several important functions in the oral cavity. The enamel helps to protect the dentin from abrasion and infection. In addition, the labial surface helps to form the occlusion, which is the contact between the upper and lower teeth when the mouth is closed. The occlusion helps to distribute the forces of mastication throughout the mouth and aids in the digestion of food. The labial surface also helps to give the teeth their characteristic shape.
Clinical Significance
The labial surface of the teeth is important in the clinical setting. It is the most visible surface of the tooth and thus is important for aesthetics. The labial surface is also important for diagnosing and treating caries, periodontal disease, and other dental conditions. In addition, the labial surface is important for the fabrication of dental restorations such as crowns, veneers, and bridges.
Conclusion
The labial surface of the teeth is an important component of dental anatomy, function, and clinical significance. The labial surface serves several important functions such as protecting the dentin, forming the occlusion, and providing aesthetics. It is important for diagnosing and treating dental conditions and is a major factor in the fabrication of dental restorations.
References
Bailey, J. E., & Glick, B. (2010). Anatomy and Physiology of the Oral Cavity. The Dental Hygienist’s Guide to Nutritional Care, 4th ed., pp. 107-126. St. Louis, MO: Elsevier.
Keller, E. C., & Callan, D. P. (2015). Essentials of Dental Caries: The Disease and Its Management. 4th ed., pp. 23-39. Oxford: Wiley Blackwell.
Nguyen, M. T., & Reynolds, M. A. (2018). Principles of Oral and Maxillofacial Radiology. 2nd ed., pp. 57-67. St. Louis, MO: Elsevier.