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Radioanatomy and Tooth Eruption - Coggle Diagram
Radioanatomy and Tooth Eruption
Radioanatomy
Definition
Study of anatomical structures on radiographs
Purpose
Identify normal structures
Differentiate normal vs pathology
Assist diagnosis & treatment planning
Radiographic Appearance
Radiopaque
White / light appearance
Dense structures absorb X-rays
Examples:
Enamel
Dentin
Bone
Metal restorations
Radiolucent
Dark appearance
Less dense structures allow X-rays to pass
Examples:
Pulp chamber
Root canal
Caries
Periodontal ligament space
Maxillary Radioanatomy
Radiopaque Structures
Nasal septum
Zygomatic process
Hard palate
Floor of maxillary sinus
Radiolucent Structures
Maxillary sinus
Nasal cavity
Incisive foramen
Mandibular Radioanatomy
Radiopaque Structures
External oblique ridge
Internal oblique ridge
Mental ridge
Genial tubercles
Radiolucent Structures
Mandibular canal
Mental foramen
Submandibular fossa
Tooth Eruption
Definition
Movement of tooth from bone into oral cavity
Stages of Tooth Eruption
Pre-eruptive stage
Eruptive stage
Post-eruptive stage
Eruption Sequence
Primary Dentition
Begins around 6 months
Complete around 2–3 years
Permanent Dentition
Begins around 6 years
Third molars erupt last
Radiographic Importance of Tooth Eruption
Evaluate tooth development
Detect delayed eruption
Identify impacted teeth
Assess missing/supernumerary teeth
Aid orthodontic planning
Eruption Problems
Delayed Eruption
Causes:
Lack of space
Systemic disease
Nutritional deficiency
Impacted Teeth
Tooth unable to erupt normally
Commonly affected:
Third molars
Canines