Kannrybio | Implant-grade Bioactive Ceramics & Calcium Phosphate Powders

Bone graft substitutes & fillers: HA/β‑TCP blends and resorption control

How to choose HA vs β‑TCP vs composite blocks for bone filler programs, plus the key spec lines (Ca/P, PSD, porosity) OEM teams ask for.

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Bone filler performance is a balance between mechanical stability and resorption. The fastest way to derail a project is to lock in a “purity” number while leaving phase, PSD, and microstructure undefined.

Material selection cheat sheet

GoalTypical choiceWhy
Longer stabilityHA (micro)Lower dissolution; good as a stable scaffold phase.
Faster resorptionβ‑TCPHigher dissolution than HA; resorption can be tuned by PSD and phase control.
Form factor blockHA/TCP Composite BlockConvenient for structured fillers; program‑specific porosity spec is key.

Specs that matter (and why)

  • Phase composition: HA/β‑TCP ratio (XRD) is often more predictive than a single “purity” line.
  • PSD window: affects packing, rheology (if paste), and dissolution kinetics.
  • Porosity/structure: for blocks/scaffolds, define pore size distribution and compressive strength targets.

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Talk to us about your target resorption profile