Related Experiment Video
Updated: May 5, 2026

Shrinkage of Dental Composite in Simulated Cavity Measured with Digital Image Correlation
Published on: July 21, 2014
Fracture Resistance of Fiber-Reinforced vs. Conventional Resin Composite Restorations in Structurally Compromised
Hamideh Sadat Mohammadipour1, Mostafa Farajzadeh2, Hediyeh Toutouni3
1Department of Restorative Dentistry, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran.
Short fiber-reinforced resin composite (SFRC) significantly enhanced fracture strength in compromised molars compared to conventional methods. SFRC also improved favorable fracture patterns, offering better outcomes for restorative dentistry.
Area of Science:
- Dental Materials Science
- Restorative Dentistry
- Biomaterials Engineering
Background:
- Structurally compromised molars require advanced restorative materials to withstand occlusal forces.
- Conventional resin composites may lack the necessary strength and fracture resistance for severely weakened teeth.
- Fiber-reinforced composites offer potential for improved mechanical properties in dental restorations.
Purpose of the Study:
- To evaluate the reinforcing effect of different fiber-reinforced resin composites in restoring compromised molars.
- To compare the fracture resistance of restored molars using conventional resin composite versus fiber-reinforced options.
- To assess the influence of fiber reinforcement on fracture patterns in restored molars.
Main Methods:
- Sixty human third molars were prepared with wide mesio-occluso-distal (MOD) cavities.
- Restorations were performed using conventional resin composite, short fiber-reinforced resin composite (SFRC), or Ribbond fibers with conventional composite.
- Fracture resistance was tested mechanically, and fracture patterns were analyzed stereomicroscopically.
Main Results:
- The SFRC group (EverX Posterior) exhibited the highest fracture strength (4051.4 N).
- SFRC restorations showed significantly greater fracture strength compared to Ribbond fibers (G3) and conventional composite with cusp reduction (G5).
- The highest percentage of favorable fractures (above CEJ) was observed in intact teeth (G6, 70%) and SFRC restored teeth (G2, 60%).
Conclusions:
- Short fiber-reinforced resin composite (SFRC) and polyethylene fibers (Ribbond) in a cross-sectional direction improve fracture strength in compromised molars.
- SFRC and polyethylene fibers favorably influence fracture modes, leading to more favorable fracture patterns.
- These fiber-reinforced materials offer superior outcomes for restoring severely weakened molar teeth compared to conventional resin composites.
More Related Videos
05:30Roughness Impact of Piezoelectric Dental Scaler on Two Distinct Flowable Composite Filling Materials
Published on: January 10, 2025
07:42Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material
Published on: December 20, 2024
Related Concept Videos
Fractures: Bone Repair
Minor fractures with no bone displacement are treated by immobilizing the fractured bone using a cast or splint. However, in the case of fractures with displaced bones, the broken bones are repositioned before immobilization to ensure successful healing without deformation and loss of function. The realignment of fractured bone ends is performed through a process called reduction. If the...
Stress-Strain Diagram - Brittle Materials
Fiber Reinforced Concrete