Dental fillers & pastes: particle size, radiopacity, and paste stability

Dental paste stability is usually lost via agglomeration, water pickup, or surface chemistry mismatch between powder and binder. The best spec is one that defines both the powder window and the measurement method.

Recommended materials

• nHA for surface activity and reinforcement (control dispersion protocol)
• HA (micro) for bulk filler loading and stability
• Functionalized CaP for program‑specific surface tuning

Spec checklist

• PSD: D10/D50/D90 with method & dispersant protocol
• Moisture: packaging and storage conditions
• Impurities: heavy metals and key trace ions as required by your program

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