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Micro-Computed Tomography of Tooth Volume Changes Following Post Removal.

Jiyeon J Kim1, Satish Alapati2, Kent L Knoernschild1

  • 1Department of Restorative Dentistry, University of Illinois at Chicago College of Dentistry, Chicago, IL.

Journal of Prosthodontics : Official Journal of the American College of Prosthodontists
|February 6, 2016
PubMed
Summary
This summary is machine-generated.

Stainless steel posts cemented with glass-ionomer showed the most tooth root structure loss after removal. This study measured tooth volume changes with micro-CT to compare post and cement systems.

Keywords:
Tomographycanalendodonticpost removalpost space

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Area of Science:

  • Dental Materials Science
  • Endodontics
  • Biomaterials

Background:

  • Post and core restorations are crucial for restoring endodontically treated teeth.
  • The choice of post and cement system can influence the integrity of the remaining tooth structure.
  • Understanding material interactions is vital for predictable clinical outcomes.

Purpose of the Study:

  • To quantify tooth volume changes following post removal using micro-computed tomography (micro-CT).
  • To compare the effects of different prefabricated post (stainless steel vs. fiber-reinforced composite) and cement (glass-ionomer vs. resin) combinations on tooth structure.
  • To identify which post-cement system leads to the most significant tooth structure loss.

Main Methods:

  • Forty-eight extracted teeth were prepared and restored with different post and cement systems.
  • Micro-CT was used to measure baseline tooth root volume.
  • Posts and cement were removed using ultrasonic vibration under microscopy.
  • Post-removal tooth root volume was measured again using micro-CT.
  • Statistical analysis (Kruskal-Wallis ANOVA, Tukey's post hoc test) was performed.

Main Results:

  • A statistically significant difference in tooth root volume change was observed among the tested groups.
  • The combination of stainless steel posts and glass-ionomer cement resulted in significantly more tooth root volume loss compared to other groups.
  • The specific combination of serrated parallel-sided stainless steel posts with glass-ionomer cement showed the greatest structural compromise.

Conclusions:

  • Serrated parallel-sided stainless steel posts cemented with glass-ionomer cement cause the most significant tooth root structure loss upon removal.
  • The findings highlight the importance of considering the post and cement system's impact on long-term tooth preservation.
  • Clinicians should be aware of the potential for increased tooth structure loss with specific post-cement combinations during post removal procedures.