Location and Function - Maxillary first premolar is located in the upper jaw. - It is positioned laterally from the maxillary canines. - It is mesial to the maxillary second premolars. - The main function of this premolar is tearing during chewing. - It shares a similar function with canines.

Anatomy - Maxillary first premolar has two cusps. - The buccal cusp resembles the teeth of carnivorous animals. - There are no deciduous maxillary premolars. - The permanent premolars erupt around 10-11 years of age. - It takes about 3 years for the premolar and its root to fully calcify.

Vulnerability to Fracture - The upper 1st premolar is prone to fracture during extraction. - It has a long buccal root with a narrow root canal. - The palatal root is short with a wide root canal. - Dentists sometimes refer to it as the King of Fracture. - Care must be taken during exodontia to avoid fractures.

Notation Systems - In the universal system of notation, the permanent maxillary premolars are designated by numbers. - The right maxillary first premolar is known as 5. - The left maxillary first premolar is known as 12. - In the Palmer notation, the right and left first premolars have the same number, 4. - The right premolar is indicated by the symbol ┘, while the left one is indicated by └.

References - Ash, Major M. and Stanley J. Nelson, 2003. Wheelers Dental Anatomy, Physiology, and Occlusion. 8th edition. - The article on maxillary first premolar is available on Wikipedia. - The article is categorised under types of teeth and human mouth anatomy. - The article is a stub in the musculoskeletal system and dentistry categories. - The Wikipedia page can be expanded for more information.