The HAnano Surface is a 20 nm thin coating based on nanocrystalline Hydroxyapatite (HA) particles, the main constituent of bone and teeth. The HAnano Surface particles have the same shape, size and crystallinity as human bone, resulting in a super-hydrophilic surface. This allows for a more intimate interaction between implant and the body, thereby accelerating osseointegration and providing stronger anchoring to the bone. Pre-clinical studies have shown that the HAnano Surface increases the anchoring strength of PEEK implants with more than 81% after 3 weeks of healing. This indicates that the healing time required prior to loading of the implant can be reduced and patients may recover lost body functions faster.
All commercial implants, regardless of material and structure, can be coated with the HAnano Surface. Compared to more conventional coatings, such as micrometer thick plasma-sprayed HA layers, the HAnano Surface is nanometer thin. The mere 20 nm layer of coating means that the HAnano Surface can preserve the micron-structure/micro-roughness of the implant surface while improving the osteoconductivity (figure to the right). The HAnano Surface can be used in all kinds of implant applications; from traditional screws and hip stems to complex and porous materials. The thinness of the HAnano Surface also eliminates the need for new implant instrumentation such as drills and screwing taps.The production of the HAnano Surface is based on a wet chemical process. The technology is simple and more cost-effective when compared to other coating methods and can easily be integrated at the implant manufacturer’s internal production lines.
The surface can be applied in three different ways; through spraying (a), dripping (b) or dipping (c). Excess coating solution is removed by spinning and pressurized gas followed by a short heat treatment.