acetabulum coated with BONIT®-HA-coating (calcium phosphate) for optimised and improved osseointegration

Electrochemical calcium phosphate layer: BONIT®-HA


The BONIT®-HA coating is created in a chemical process in which the coated, conventional BONIT® layer is partially transformed into the less soluble hydroxyapatite (HA) phase.
Range of Application
  • Joint implants: hip joint, knee joint, ankle joint, shoulder joint, wrist joint, finger implants and spine implants
Advantages of the Procedure
  • Microporosity with high capillarity
  • Complete and uniform coverage of porous surfaces and complex implant geometries
  • No flaking of particles or coating delaminations
  • Large free calcium and phosphate reservoir on the implant surface after surgery offers ideal proliferation conditions for osteoblasts
  • Faster and better healing
  • "Non-line-of-sight" process
  • Color: light gray
  • Coating thickness: 20±10 µm
  • Porosity: 60 %
  • Adhesive strength: ≥ 15 MPa
  • Ca/P ratio: 1.67±0.15
  • Phase composition: ≥ 90 % Hydroxyapatite/≤ 10 % Brushite
  • Solubility: lower solubility in comparison to pure BONIT® coating
  • Outstanding biocompatibility
  • Fine crystalline structure with high inner surface
  • High capillarity effect
SEM-Picture of the BONIT®-HA surface
 SEM-Picture of the BONIT-HA surface

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