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SC 14 - Coggle Diagram

- - - - Eruption Sequestra
      - Fibrous Developmental Malformations
      - Eruption Cysts
      - Dentigerous Cysts
    - - Cleidocranial Dysostosis
      - Hypothyroidism
      - Down’s Syndrome
      - Hypopituitarism
    - - Alveolar bone remodelling
      - PDL formation
      - Root formation
      - Dental follicle
    - - Gender
      - Hormone
      - Genetics
      - Race
  - - - Passive eruption is defined where the gum shrinks but there are no tooth movements. APE is a genetic or developmental condition characterized by coronal positioning of the gingival margin over the enamel, resulting in short clinical crowns.
    - - Active eruption is the movement of the tooth from its developmental site in alveolar bone to its functional position in the oral cavity. AAE occurs when teeth achieve the opposite relationship to the occlusal plane prematurely and the osseous crest is on, or very close to the Cementoenamel Junction (CEJ).
  - - - The pre-eruptive stage includes all primary and permanent crown movements from the initial onset and formation to the completion of the crown. Therefore, this stage is completed with an early start of root formation.
    - - The tooth passes through the bone crypt, connective tissue, and oral epithelium before reaching the oral epithelium.
    - - This stage begins when the teeth function and ends when the teeth fall and last for years. The teeth move in occlusal and proximal directions during this stage.
- - - - .
        
        Because the pulp of normal teeth is made up of soft tissue, it appears radiolucent.
        
        The chambers and root canals containing the pulp extend from the interior of the crown to the apices of the roots.
        
        An apical foramen is usually recognizable.
    - - .
        
        The dentin is around 75% mineralized, and its radiographic appearance is similar to bone because of its reduced mineral content.
        
        Because of its consistent morphologic properties, dentin appears smooth and homogenous on radiographs.
        
        It has a lower density and is less radiopaque than enamel.
    - - .
        
        Tooth enamel is the shiny and white outer layer that protects the underlying tissues.
        
        The enamel cap appears more radiopaque than the other tissues because it is the most dense, naturally occurring substance in human body.
        
        Its radiographic image is uniformly opaque and lack of fine structure.
    - - Cementum is frequently not visible radiographically because the contrast between cementum and dentin is so low and the cementum layer is so thin.
      - Its radiopacity is similar to that of bone and dentin.
  - - - It could be seen that the permanent teeth hasn't fully erupt yet on the full primary dentition.
        The permanent teeth are located beneath the gums under the existing primary teeth
    - - The permanent teeth are no longer located beneath the gum as the teeth has fully erupt.
  - - - 6-9 years
        
        All 8 permanent incisors replace the primary incisors
      - 9-12 years
        
        All 4 permanent canines and 8 premolars replace primary canines and molars
      - 6 years
        
        Approximately at this age, permanent teeth start to appear (first molars distal to the primary second molars)
        
        Followed by the loss of primary mandibular central incisors which are then quickly replaced by permanent mandibular central incisors
      - 12 years
        
        Second molars emerge distal to the permanent first molars
    - - 14-16 years
        
        At 13 years, all permanent teeth from central incisors to the crowns of 2nd molars are fully erupted
        
        At 14-16 years, root formation of 2nd molars are completed. Crown formation of 3rd molars are completed
      - 17-21 years
        
        At 17 years, 3rd molars begin to erupt
        
        After 21 years, entirety of 3rd molar crowns are visible, however root formation of is not completed
      - 11-13 years
        
        Eruption of 2nd molars (non-succedaneous teeth)
        
        At age 12, crown development of 3rd molars begins
      - 25 years
        
        All permanent teeth are fully erupted and root formation is completed
    - - 1 year
        
        Deciduous first molars begin to erupt from the mandible to the maxilla
      - 2 years
        
        Deciduous canines begin to erupt from the mandible to the maxilla
      - 9 months
        
        Deciduous lateral incisor teeth begin to erupt from the mandible - maxilla
      - 3 years
        
        Deciduous second molars begin to erupt from the mandible to the maxilla
      - 6 months
        
        Deciduous central incisors begin to erupt from the mandible - maxilla
      - 4 years
        
        Permanent central and lateral incisors begin to form crowns
      - Primary dentition
        
        Starting from the age of 6 months to 2 years
        All primary teeth begin to erupt in the child's teeth
      - Edentulous (No teeth)
        
        From birth to 6 months of age, there is no primary tooth growth in the oral cavity