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Line 23: − + − + − + − + − + − ==Eruption== − − ===Deciduous Tooth=== − − Eruption occurs after the [[Enamel Organ#Crown|crown]] has fully formed (prior to complete [[Enamel Organ#Root|root]] formation). It provides the space required for [[Enamel Organ#Root|root]] completion. The epithelial covering is continuous with gums after eruption. Erosion (wear) removes the epithelium. The 'toothless' gene stops eruption. − − [[Image:Tooth Radiograph.jpg|thumb|right|250px|Tooth Radiograph - Copyright Nottingham 2008]] − ===Permanent Tooth=== − − The tooth migrates into the socket of the deciduous tooth on the lingual side. It increases the pressure on the deciduous tooth by increased growth. Resorption of the deciduous tooth root leads to its loosening. The deciduous tooth then sheds and the permanent tooth replaces it. Premature loss of the deciduous tooth leads to disorganised (non-occluding) permanent teeth. Line 51:
Line 41: − [[Category:A&P Done]] − [[Category:Dentistry]]
Text replace - "[[Enamel Organ#" to "[[Tooth - Anatomy & Physiology#"
7. Small mass of cells bud off the dental lamina forming the primordium of the permanent tooth which continues development.
7. Small mass of cells bud off the dental lamina forming the primordium of the permanent tooth which continues development.
8. The inner cell layer of enamel organ (from oral epithelium) differentiates into [[Enamel Organ#Ameloblasts|ameloblasts]].
8. The inner cell layer of enamel organ (from oral epithelium) differentiates into [[Tooth - Anatomy & Physiology#Ameloblasts|ameloblasts]].
9. Neighbouring cells in the dental papillae (from neural crest cells) differentiate into [[Enamel Organ#Odontoblasts|odontoblasts]].
9. Neighbouring cells in the dental papillae (from neural crest cells) differentiate into [[Tooth - Anatomy & Physiology#Odontoblasts|odontoblasts]].
10. Dentine surrounds [[Enamel Organ#Pulp|pulp]] to produce the [[Enamel Organ#Root|root]] of the tooth.
10. Dentine surrounds [[Tooth - Anatomy & Physiology#Pulp|pulp]] to produce the [[Tooth - Anatomy & Physiology#Root|root]] of the tooth.
11. Epithelial cells near the distal tooth form [[Enamel Organ#Cementoblasts|cementoblasts]], secreting [[Enamel Organ#Cementum|cementum]] around the tooth [[Enamel Organ#Root|root]].
11. Epithelial cells near the distal tooth form [[Tooth - Anatomy & Physiology#Cementoblasts|cementoblasts]], secreting [[Tooth - Anatomy & Physiology#Cementum|cementum]] around the tooth [[Tooth - Anatomy & Physiology#Root|root]].
There is a reciprocal inductive interaction between the oral epithelium and mesenchyme precursors. The mesenchyme forms the tooth, it has labile differentiative properties but stable morphogenic properties. Tooth formation starts at the [[Enamel Organ#Crown|crown]] and progresses towards the [[Enamel Organ#Root|root]]. The tooth does not acquire full length until the crown has emerged. Tooth growth is appositional.
There is a reciprocal inductive interaction between the oral epithelium and mesenchyme precursors. The mesenchyme forms the tooth, it has labile differentiative properties but stable morphogenic properties. Tooth formation starts at the [[Tooth - Anatomy & Physiology#Crown|crown]] and progresses towards the [[Tooth - Anatomy & Physiology#Root|root]]. The tooth does not acquire full length until the crown has emerged. Tooth growth is appositional.
{{Learning
{{Learning
{{OpenPages}}
{{OpenPages}}
[[Category:Teeth - Anatomy & Physiology]]
[[Category:Teeth - Anatomy & Physiology]]