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Radiographic evaluation of extruded obturation materials.

R A Augsburger1, D D Peters

  • 1USA DENTAC, Fort Huachuca, AZ.

Journal of Endodontics
|October 1, 1990
PubMed
Summary
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Extruded root canal filling materials, particularly zinc oxide and eugenol-based sealers, are gradually removed from periradicular tissues over time. This removal process for sealers is faster than for gutta-percha.

Area of Science:

  • Endodontics
  • Dental Radiology
  • Biomaterials

Background:

  • Root canal obturation aims to seal the root canal system.
  • Extrusion of filling materials into periradicular tissues can occur.
  • The long-term fate of extruded materials is of clinical interest.

Purpose of the Study:

  • To evaluate the radiographic changes of extruded root canal filling materials over time.
  • To determine the resorption rate of zinc oxide and eugenol-based sealers and gutta-percha in periradicular tissues.

Main Methods:

  • Radiographic assessment of extruded filling materials.
  • Comparison of immediate postoperative radiographs with serial recall radiographs up to 6.5 years.
  • Evaluation of two specific zinc oxide and eugenol-based sealers.

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Main Results:

  • Consistently less extruded material was observed at successive postoperative periods.
  • Zinc oxide and eugenol-based sealers showed evidence of removal from periradicular tissues over time.
  • Sealer removal from periradicular tissues occurred more rapidly than gutta-percha removal.

Conclusions:

  • Extruded zinc oxide and eugenol-based root canal sealers are resorbed from periradicular tissues over time.
  • The resorption of sealer material is a time-dependent process.
  • Sealers are resorbed more quickly than gutta-percha, suggesting differential tissue response.