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causes of failure of Root Canal Treatment a brief riview
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causes of failure of Root Canal Treatment a brief riview

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Related to operative dentistry

Related to operative dentistry

Published in: Health & Medicine
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  • 1. Powerpoint Templates Page 1 Causes of endodontic failure Dr.Taj Mahmood
  • 2. Powerpoint Templates Page 2 INDICATIONS • Failure of root canal treatment is indicated in following conditions a)Post treatment persistent lesion b)An increase in size of pre-existing lesion c)Pain, swelling and loss of function d)Sinus tract e)Signs of root resorption and hypercementosis
  • 3. Powerpoint Templates Page 3 CAUSES OF FAILURE OF ENDODONTICS • EXTRA RADICULAR • INTRA RADICULAR
  • 4. Powerpoint Templates Page 4 EXTRA RADICULAR FACTORS 1.Microbial cause Abcess periapical periodontitis Overinstrumentation Infected periapical pocket cyst
  • 5. Powerpoint Templates Page 5 EXTRA RADICULAR FACTORS 2.Non microbial causes Foreign bodies Gutta percha Temporary filling material Broken instrument Sealers Cotton fibrils Treatment ; surgical removal of irritant Cholestrol crystals True cyst Scar tissue healing
  • 6. Powerpoint Templates Page 6 INTRARADICULAR FACTORS They may be 1. Preoperative 2. Operative 3. Post operative
  • 7. Powerpoint Templates Page 7 • PREOPERATIVE Misdiagnosis lack of information Poor case selection Un-negotiable canal, resorption, unrestorable tooth, secondarily periodontal involvement occlusal trauma apical abscess or cyst Poor prognosis avulsed tooth, unsuccessful treatment of endo-perio lesion
  • 8. Powerpoint Templates Page 8 • OPERATIVE FACTORS 1.Failure to obtain biologic objective a)improper removal of irritant b)debris pushed beyond the apical foramen 2.Failure to obtain mechanical objectives a)improper access cavity preparation b)mishaps during canal preparation short or excess preparation ledge perforation transportation missed canals zipping, elbow formation apical blockage separated instrument
  • 9. Powerpoint Templates Page 9 OPERATIVE FACTORS c)improper obturation underobturation or overobturation 3.other causes irrigant related mishaps tissue emphysema
  • 10. Powerpoint Templates Page 10 POSTOPERATIVE FACTORS • Post operative Trauma Fracture Super imposed non-endodontic lesion Poorly designd final restoration
  • 11. Powerpoint Templates Page 11
  • 12. Powerpoint Templates Page 12 Ledge formation
  • 13. Powerpoint Templates Page 13
  • 14. Powerpoint Templates Page 14 TREATMENT OPTIONS • Best is prevention in each and every step of root canal preparation • Proper diagnosis and treatment planning • Predecide the curving of canals and the number of root canals • Adequate access cavity and avoid perforation and too much destruction of structure of tooth • Proper control of instruments and avoid excessive force
  • 15. Powerpoint Templates Page 15 TREATMENT OPTIONS • Work in a proper sequence while filing • Avoid in exerting too much force • Go to surgical removal of lesion and irritant if necessary or medicate the patient • Always be relax and comfortable to handle the complication • If very poor prognosis is indicated then go for extraction

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