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Effect of Simulated Pulpal Microcirculation on Temperature When Light Curing Bulk Fill Composites
Operative Dentistry
|November 17, 2018
Summary
Light curing dental restorations with simulated pulpal flow reduced heat. Flowable bulk fill resin composites like SDR showed better light transmission and cure than paste forms, but adhesive curing caused the highest temperature rise.
Area of Science:
- Dentistry
- Dental Materials Science
- Biomaterials
Background:
- Bulk fill resin composites are used for faster dental restorations.
- Light curing these materials can generate heat, potentially affecting the pulp.
Purpose of the Study:
- To assess the temperature increase in the pulp chamber during light curing of bulk fill resin composites.
- To evaluate the influence of simulated pulpal fluid flow on this temperature rise.
Main Methods:
- Extracted human molars with standardized cavities were restored with bulk fill composites (SDR, AURA) and a self-etch adhesive.
- Temperature was measured in the pulp chamber during light curing with and without simulated pulpal microcirculation.
- Degree of conversion was assessed using Fourier-Transform Infra Red spectroscopy.
Main Results:
- Simulated pulpal microcirculation significantly reduced temperature increases.
- The greatest temperature rise occurred during light curing of the adhesive system.
- The flowable composite (SDR) exhibited higher light transmission and degree of conversion compared to the regular paste (AURA).
Conclusions:
- Simulated pulpal microcirculation is effective in mitigating temperature rise during light curing.
- Flowable bulk fill composites offer advantages in light transmission and cure.
- Adhesive light curing presents the highest risk of pulpal temperature increase.
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