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Related Experiment Video

Updated: Nov 29, 2025

Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material
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Core build-up resin composites: an in-vitro comparative study.

L Spinhayer1,2, A T B Bui1, J G Leprince1,2

  • 1School of Dental Medicine, Cliniques Universitaires Saint-Luc, UCLouvain, Brussels, Belgium.

Biomaterial Investigations in Dentistry
|November 19, 2020
PubMed
Summary

This study compared flexural properties of various core build-up resin composites (CBU-RCs). Light-curing significantly improved flexural modulus in dual-cure CBU-RCs, with wide property variations noted among materials.

Keywords:
core build-updual cureflexural modulusflexural strengthresin composite

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Area of Science:

  • Dental Materials Science
  • Biomaterials Engineering
  • Restorative Dentistry

Background:

  • Resin composites (RCs) are widely used for core build-ups under full crowns.
  • Limited independent data exists to guide practitioners in selecting core build-up resin composite (CBU-RC) materials.
  • Understanding the mechanical properties of CBU-RCs is crucial for successful clinical application.

Purpose of the Study:

  • To compare the flexural properties of various commercially available CBU-RCs.
  • To evaluate light-cure, self-cure, and dual-cure CBU-RCs against conventional light-cure RCs.
  • To determine the influence of light-curing on the flexural properties of dual-cure CBU-RCs.

Main Methods:

  • Flexural modulus (Eflex) and flexural strength (σf) were tested using three-point bending (n=20).
  • Materials included light-cure, self-cure, and dual-cure CBU-RCs, alongside conventional light-cure RCs.
  • Thermogravimetric analysis determined inorganic filler content (n=3).

Main Results:

  • Significant differences in Eflex and σf were found between conventional RCs and CBU-RCs (p < .0001).
  • Light-cured RCs exhibited higher Eflex than self- and dual-cure RCs; no clear trend for σf.
  • A strong linear correlation existed between inorganic filler content and Eflex (R²=0.85, p < .0001).

Conclusions:

  • Light-curing positively influenced the Eflex of dual-cure CBU-RCs.
  • Substantial variations in flexural properties, particularly Eflex, were observed among tested materials.
  • The findings raise questions about the suitability of some CBU-RCs for replacing dentin in extensive tissue loss scenarios.