[Classification and several mechanical properties of core composite resins]

Area of Science:

• Dental Materials Science
• Polymer Chemistry

Context:

• Core resins are crucial for indirect restorations.
• Understanding resin classification and properties aids clinical decisions.

Purpose:

• To classify six dental core resins based on filler characteristics.
• To evaluate the mechanical properties of these resins post-curing.

Summary:

• Six core resins were categorized into semihybrid (Bell Feel Core, Clearfil Core, Clearfil PhotoCore, Core Max, Core Max II) and hybrid (Microrest Core) types using SEM and EDX analysis.
• Detected elements included Si, Zr, Al, Ba, and La.
• Mechanical properties demonstrated high stability one day and one week after curing.

Impact:

• Findings suggest postponing crown preparation and impression taking until the next appointment to ensure optimal resin stability.
• This research provides valuable data for selecting appropriate core materials in restorative dentistry.