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Leaching behaviors of computer-aided design/computer-aided manufacturing composite resin component elements immersed
Junji Iwata1, Masaki Asakura1, Tatsuhide Hayashi1
1Department of Dental Materials Science, Aichi Gakuin University School of Dentistry, Nagoya, Japan.
Journal of Prosthodontic Research
|January 26, 2019
Summary
Filler elements leach from CAD/CAM composite resins into water, with amounts varying by material and temperature. Silicon, barium, and strontium leaching was observed, alongside surface degradation, impacting dental material stability.
Area of Science:
- Materials Science
- Biomaterials Engineering
- Dental Materials Research
Background:
- Computer-aided design/computer-aided manufacturing (CAD/CAM) composite resins are widely used in dentistry.
- Understanding the stability and potential degradation of these materials is crucial for long-term clinical success.
- Leaching of filler elements can affect the mechanical properties and biocompatibility of dental restorations.
Purpose of the Study:
- To evaluate the leaching behaviors of filler elements from various CAD/CAM composite resins.
- To investigate the influence of immersion temperature on the leaching process.
- To assess the surface changes in CAD/CAM composites after immersion testing.
Main Methods:
- Four commercial CAD/CAM resin composite blanks were subjected to immersion tests in purified water.
- Specimens were stored at temperatures of 37, 60, 70, or 80°C for 30 days.
- Leached element concentrations were quantified using inductively coupled plasma atomic emission spectrometry, and surface morphology was examined.
Main Results:
- Silicon (Si), the primary filler component, leached from all tested CAD/CAM materials.
- Some materials exhibited significant leaching of barium (Ba) and strontium (Sr) alongside Si.
- Increased immersion temperatures led to a higher amount of leached elements and observable surface degradation.
Conclusions:
- Filler elements are released from CAD/CAM composite resins into purified water.
- The type and quantity of leached elements vary significantly between different materials, depending on their filler composition.
- Leaching is temperature-dependent, with higher temperatures promoting greater element release and material degradation.
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