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Early failures when using three different adhesively retained core build-up materials-a randomized controlled trial.

Andreas Zenthöfer1, Justo Lorenzo Bermejo2, Wolfgang Bömicke3

  • 1Department of Prosthodontics, Dental School, University of Heidelberg, Im Neuenheimer Feld 400, 69120, Heidelberg, Germany. andreas.zenthoefer@med.uni-heidelberg.de.

Clinical Oral Investigations
|September 7, 2021
PubMed
Summary

Core build-up size and operator experience significantly impact failure risk, not the composite material itself. Adhesive techniques showed similar failure rates for core build-ups before fixed dental prosthesis placement.

Keywords:
AdhesiveClinicalCore build-upDental prosthesesFailureRCT

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Area of Science:

  • Dental Materials Science
  • Prosthodontics
  • Clinical Dentistry

Background:

  • Adhesively retained core build-ups are crucial for restoring abutment teeth before fixed dental prosthesis (FDP) placement.
  • Evaluating the failure rates and risk factors of different core build-up materials is essential for clinical success.

Purpose of the Study:

  • To compare failure rates of three adhesively retained core build-up composites.
  • To identify risk factors associated with core build-up failures prior to FDP incorporation.

Main Methods:

  • A randomized controlled trial involving 300 participants was conducted.
  • Participants received one of three core build-up materials (Rebilda DC, Clearfil DC Core, Multicore Flow) using either total-etch or self-etch adhesive techniques.
  • Failure rates were analyzed using univariate and multiple logistic regression.

Main Results:

  • The overall failure rate was 8%, with no statistically significant differences between the three core build-up materials.
  • Larger cavities (more than 3 surfaces) and treatment by dental students were independently associated with increased failure risk.
  • The mean time between core build-up placement and FDP incorporation was 12.2 weeks.

Conclusions:

  • Core build-up size and operator clinical experience are significant risk factors for early failure.
  • Failure rates appear similar between core build-up materials combined with self-etch or total-etch adhesive techniques.
  • This study provides insights into the short-term performance of core build-up materials and identifies key factors influencing success.