Family Friendly & Specialty Dentists in London, UK
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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.
