Mandibular central incisor: Difference between revisions
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{{Short description|Human tooth}} |
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| Name = Mandibular central incisor |
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| Image = Mandibular central incisors01-01-06.png |
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| Caption = Mandibular central incisors of permanent and primary teeth marked in red. |
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| Caption2 = The deciduous mandibular central incisors in a 7-month-old infant. Note the incisal ridges which give the teeth a serrated appearance. |
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The '''mandibular central incisor''' is the [[tooth]] located on the [[Human mandible|jaw]], adjacent to the midline of the [[face]]. It is mesial (toward the midline of the face) from both [[mandibular lateral incisor]]s. As with all [[incisor]]s, its function includes [[Shearing (physics)|shearing]] or cutting food during [[mastication]], commonly known as chewing. There are no [[cusp (dentistry)|cusp]]s on the tooth. Instead, the surface area of the tooth used in eating is called an incisal ridge or incisal edge. Though the two are similar, there are some minor differences between the [[deciduous teeth|deciduous]] (baby) mandibular central incisor and that of the [[permanent teeth|permanent]] mandibular central incisor.<!--Re-write this last sentence--> The mandibular central incisors are usually the first teeth to appear in the mouth, typically around the age of |
The '''mandibular central incisor''' is the [[tooth]] located on the [[Human mandible|jaw]], adjacent to the midline of the [[face]]. It is mesial (toward the midline of the face) from both [[mandibular lateral incisor]]s. As with all [[incisor]]s, its function includes [[Shearing (physics)|shearing]] or cutting food during [[mastication]], commonly known as chewing. There are no [[cusp (dentistry)|cusp]]s on the tooth. Instead, the surface area of the tooth used in eating is called an incisal ridge or incisal edge. Though the two are similar, there are some minor differences between the [[deciduous teeth|deciduous]] (baby) mandibular central incisor and that of the [[permanent teeth|permanent]] mandibular central incisor.<!--Re-write this last sentence--> The mandibular central incisors are usually the first teeth to appear in the mouth, typically around the age of 6–8 months. |
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==Notation== |
==Notation== |
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In the [[Universal numbering system (dental)|universal system of notation]], the deciduous mandibular central incisors are designated by a letter written in uppercase. The right deciduous mandibular central incisor is known as "P", and the left one is known as "O". The [[international notation]] has a different system of notation. Thus, the right deciduous mandibular central incisor is known as "81", and the left one is known as "71". |
In the [[Universal numbering system (dental)|universal system of notation]], the deciduous mandibular central incisors are designated by a letter written in uppercase. The right deciduous mandibular central incisor is known as "P", and the left one is known as "O". The [[FDI World Dental Federation notation|international notation]] has a different system of notation. Thus, the right deciduous mandibular central incisor is known as "81", and the left one is known as "71". |
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In the universal system of notation, the permanent mandibular central incisors are designated by a number. The right permanent mandibular central incisor is known as "25", and the left one is known as "24". In the [[Palmer notation]], a number is used in conjunction with a symbol designating in which quadrant the tooth is found. For this tooth, the left and right central incisors would have the same number, "1", but the right one would have the symbol, "┐", over it, while the left one would have, "┌". The international notation has a different numbering system than the previous two, and the right permanent mandibular central incisor is known as "41", and the left one is known as "31". |
In the universal system of notation, the permanent mandibular central incisors are designated by a number. The right permanent mandibular central incisor is known as "25", and the left one is known as "24". In the [[Palmer notation]], a number is used in conjunction with a symbol designating in which quadrant the tooth is found. For this tooth, the left and right central incisors would have the same number, "1", but the right one would have the symbol, "┐", over it, while the left one would have, "┌". The international notation has a different numbering system than the previous two, and the right permanent mandibular central incisor is known as "41", and the left one is known as "31". |
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==Anatomy== |
==Anatomy== |
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The central incisors have [[Fossa (anatomy)|fossa]] on their lingual surfaces. |
The central incisors have [[Fossa (anatomy)|fossa]] on their lingual surfaces. Their mesial and distal proximal contacts are located in the incisal third. The facial and lingual heights of contour are in the cervical third, as is the case with all incisors and canines. |
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==References== |
==References== |
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*Ash, Major M. and Stanley J. Nelson, 2003. '' |
*Ash, Major M. and Stanley J. Nelson, 2003. ''Wheeler's Dental Anatomy, Physiology, and Occlusion.'' 8th edition. |
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{{dentistry-stub}} |
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{{musculoskeletal-stub}} |
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{{Tooth anatomy}} |
{{Tooth anatomy}} |
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[[it:Incisivo centrale inferiore]] |
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[[Category:Human mouth anatomy]] |
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[[nl:Centrale snijtand]] |
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[[ja:下顎中切歯]] |
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[[pt:Incisivo central inferior]] |
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[[sr:Први доњи секутић]] |
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[[fi:Keskimmäinen alempi etuhammas]] |
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Latest revision as of 17:42, 3 September 2024
 | This article relies largely or entirely on a single source. (December 2021) |
| Mandibular central incisor | |
|---|---|
 Mandibular central incisors of permanent and primary teeth marked in red. | |
 The deciduous mandibular central incisors in a 7-month-old infant. Note the incisal ridges which give the teeth a serrated appearance. | |
| Identifiers | |
| FMA | 290182 |
| Anatomical terminology | |
The mandibular central incisor is the tooth located on the jaw, adjacent to the midline of the face. It is mesial (toward the midline of the face) from both mandibular lateral incisors. As with all incisors, its function includes shearing or cutting food during mastication, commonly known as chewing. There are no cusps on the tooth. Instead, the surface area of the tooth used in eating is called an incisal ridge or incisal edge. Though the two are similar, there are some minor differences between the deciduous (baby) mandibular central incisor and that of the permanent mandibular central incisor. The mandibular central incisors are usually the first teeth to appear in the mouth, typically around the age of 6–8 months.
Notation
[edit]In the universal system of notation, the deciduous mandibular central incisors are designated by a letter written in uppercase. The right deciduous mandibular central incisor is known as "P", and the left one is known as "O". The international notation has a different system of notation. Thus, the right deciduous mandibular central incisor is known as "81", and the left one is known as "71".
In the universal system of notation, the permanent mandibular central incisors are designated by a number. The right permanent mandibular central incisor is known as "25", and the left one is known as "24". In the Palmer notation, a number is used in conjunction with a symbol designating in which quadrant the tooth is found. For this tooth, the left and right central incisors would have the same number, "1", but the right one would have the symbol, "┐", over it, while the left one would have, "┌". The international notation has a different numbering system than the previous two, and the right permanent mandibular central incisor is known as "41", and the left one is known as "31".
Anatomy
[edit]The central incisors have fossa on their lingual surfaces. Their mesial and distal proximal contacts are located in the incisal third. The facial and lingual heights of contour are in the cervical third, as is the case with all incisors and canines.
References
[edit]- Ash, Major M. and Stanley J. Nelson, 2003. Wheeler's Dental Anatomy, Physiology, and Occlusion. 8th edition.