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Regressive and Traumatic Alterations of Teeth

Regressive and Traumatic Alterations of Teeth. Unit 4. Regressive Alteration. Attrition Abrasion Erosion. Attrition. Physiologic wearing away Incisal, occlusal and interproximal surfaces Part of aging process Bruxism – pathologic attrition. Attrition – Radiologic Features.

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Regressive and Traumatic Alterations of Teeth

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  1. Regressive and Traumatic Alterations of Teeth Unit 4

  2. Regressive Alteration • Attrition • Abrasion • Erosion

  3. Attrition • Physiologic wearing away • Incisal, occlusal and interproximal surfaces • Part of aging process • Bruxism – pathologic attrition

  4. Attrition – Radiologic Features • Change in normal outline • Flat occlusal plane • Loss of mamelon • Pulp chamber, canal size • Hypercementosis

  5. Attrition

  6. Attrition

  7. Abrasion • Non-physiologic wearing away • Habits • Toothbrush trauma • Dental floss injury • Occupational hazards

  8. 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

  9. You will write cases today • Describe • Type of film(s) • Location / number of lesions (problem) • Size • Shape • Border • Content • Effects on neighboring structures

  10. Case 1 for write-up

  11. March 2000 May 2003

  12. Erosion • Chemical cause • No bacteria involved • Diet • Regurgitation • Occupational hazards

  13. Erosion - Radiologic Features • Radiolucent defects • Dietary acids – labial surface • Regurgitation – mandibular lingual surface • Occupational – all surfaces

  14. Resorption Phenomenon • External • Internal

  15. External Resorption • Periapical pathology • Trauma • Mechanical forces • Tumors and cysts • Impacted teeth • Osteosclerosis • Idiopathic

  16. Ext. Resorption: Periapical Path

  17. Ext. Resorption: Trauma

  18. Case for Brett Moore

  19. Ext. Resorption: Orthodontic

  20. Ext. Resorption: Tumors/cysts

  21. Ext. Resorption: Tumors/cysts

  22. Ext. Resorption:

  23. Ext. Resorption: Impacted Tooth

  24. Ext. Resorption: Impacted Tooth

  25. Ext. Resorption: Osteosclerosis

  26. Ext. Resorption: Idiopathic

  27. Case for Ruth Atterberg

  28. Internal Resorption • Trauma • Idiopathic

  29. Int. Resorption: Idiopathic

  30. Internal Resorption: Trauma

  31. Traumatic Injury to Teeth • Concussion • Luxation • Avulsion

  32. 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

  33. Luxation • Dislocation of teeth: intrusion, extrusion, lateral, lingual or buccal • Early radiographic observation: widened PDL spaces • Long term effect: pulpal sclerosis, necrosis, periapical lesion

  34. Avulsion • Loss of tooth • Socket outline • Fracture of alveolar bone • Possibility of reimplantation

  35. Fracture of Teeth • Coronal fracture • Cusp • Pulp • Root fracture • Horizontal • Vertical • (Details of fracture in Unit 11)

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