regressive and traumatic alterations of teeth
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Presentation Transcript
regressive alteration
Regressive Alteration
  • Attrition
  • Abrasion
  • Erosion
attrition
Attrition
  • Physiologic wearing away
  • Incisal, occlusal and interproximal surfaces
  • Part of aging process
  • Bruxism – pathologic attrition
attrition radiologic features
Attrition – Radiologic Features
  • Change in normal outline
  • Flat occlusal plane
  • Loss of mamelon
  • Pulp chamber, canal size
  • Hypercementosis
abrasion
Abrasion
  • Non-physiologic wearing away
  • Habits
  • Toothbrush trauma
  • Dental floss injury
  • Occupational hazards
abrasion radiologic features
Abrasion – Radiologic Features
  • Radiolucent defects at the cervical region
  • Well-defined semilunar defects
  • Pulp chambers sclerosed
  • In case of dental floss injury, distal surfaces more involved
you will write cases today
You will write cases today
  • Describe
    • Type of film(s)
    • Location / number of lesions (problem)
    • Size
    • Shape
    • Border
    • Content
    • Effects on neighboring structures
slide13
March 2000

May 2003

erosion
Erosion
  • Chemical cause
  • No bacteria involved
  • Diet
  • Regurgitation
  • Occupational hazards
erosion radiologic features
Erosion - Radiologic Features
  • Radiolucent defects
  • Dietary acids – labial surface
  • Regurgitation – mandibular lingual surface
  • Occupational – all surfaces
resorption phenomenon
Resorption Phenomenon
  • External
  • Internal
external resorption
External Resorption
  • Periapical pathology
  • Trauma
  • Mechanical forces
  • Tumors and cysts
  • Impacted teeth
  • Osteosclerosis
  • Idiopathic
internal resorption
Internal Resorption
  • Trauma
  • Idiopathic
traumatic injury to teeth
Traumatic Injury to Teeth
  • Concussion
  • Luxation
  • Avulsion
concussion
Concussion
  • No displacement or loosening
  • Crushing injury to adjoining areas
  • Early radiographic changes may be minimal
  • Widened PDL spaces: few days to weeks
  • Long term effects: pulpal sclerosis, necrosis, periapical lesions
luxation
Luxation
  • Dislocation of teeth: intrusion, extrusion, lateral, lingual or buccal
  • Early radiographic observation: widened PDL spaces
  • Long term effect: pulpal sclerosis, necrosis, periapical lesion
avulsion
Avulsion
  • Loss of tooth
  • Socket outline
  • Fracture of alveolar bone
  • Possibility of reimplantation
fracture of teeth
Fracture of Teeth
  • Coronal fracture
    • Cusp
    • Pulp
  • Root fracture
    • Horizontal
    • Vertical
  • (Details of fracture in Unit 11)
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