POWDERS
Reliability and Compliance
We manufacture our powders in France at our Saint Priest facility, ISO 13485 certified.
We perform plasma spray coatings on orthopedic implants using our HA powder, which we also supply to our spray coating clients and implant manufacturers.
The certificates of conformity for our powders comply with the applicable standards (ISO 13779-6, ASTM F1185-23). They are available upon delivery and on our website.
A Tailored Service
We offer a turnkey solution, combining high-quality products with a bespoke service.
You benefit from our expertise and technical mastery, through rigorous monitoring that includes tailored recommendations and personalized guidance.
To facilitate your decision-making and validation phases, samples can be made available for your production trials.
New Production Facility
Our new production facility features state-of-the-art, high-capacity equipment enabling both small and large volume production.
We integrate all manufacturing steps, from raw materials through to the finished product, along with the associated quality controls in our laboratory.
Availability and International Deliveries
- Our extensive storage space allows us to maintain ready-to-ship inventory, available on demand.
- Our powders are used by the major players in the global market with a high level of customer satisfaction.
- We are committed to the highest quality, impeccable service levels, and lead times tailored to your needs.
- Our French manufacturing helps limit customs duties and reduce costs, lead times, and other transportation-related risks.
“We would like to thank you for the consistent quality of the calcium phosphate you have been supplying us over the years. The raw material fully meets the specifications we’ve set and has proven to be highly stable. We appreciate your ongoing support and look forward to continuing our collaboration.”
“MedicalGroup offers good customer service and technical support for our HA powder purchases.
The communication channel has been smooth and takes customer feedback positively”
RBM (Resorbable Blast Media)
RBM blasting is a surface modification technique applied to dental implants. It involves subjecting the implant surface to high-velocity mechanical abrasion using biocompatible resorbable particles, producing a surface finish that promotes osseointegration.
After implant passivation, the treated surface is virtually free of residues.
RBM powder is composed of calcium phosphates: hydroxyapatite, α and β tricalcium phosphate, and tetracalcium phosphate.
What is the purpose of surface treatment on dental implants and how is it performed?
RBM blasting on dental implants increases the contact surface area with bone.
Surface roughness promotes implant osseointegration.
Although chemical methods (acid etching) and other blasting techniques (using alumina) also exist, RBM treatment provides:
- a highly uniform surface texture, within a controlled roughness (Ra) range
- a contaminant-free surface after passivation
The desired texture level is achieved by high-velocity projection of RBM particles onto the implant surface.
Several parameters, such as particle size distribution and spray distance, can be adjusted to suit the geometry and design of each implant.
What are the main characteristics of RBM powder?
- its hardness,
- its chemical composition,
- and its very low trace element content.
Chemical characterization tests using XRD and ICP in accordance with ISO 13779-3 serve as the reference for verifying its purity.
Reference |
Particle Size |
|---|---|
| RBM MG180-425 | 180/425 µm |
| RBM MG180-300 | 180/300 µm |
| RBM MG300-425 | 300/425 µm |
Other particle size distributions are available upon request.
Hydroxyapatite
Hydroxyapatite (HA) is a calcium phosphate found in bone and tooth enamel, of which it is a major component. Chemically synthesized hydroxyapatite is a powder widely used in plasma spray implant coatings. Specific formulations are developed for the manufacture of bone substitutes and 3D printing.
Its biocompatibility and bioactivity characteristics have been extensively studied and documented. It exhibits properties similar to bone tissue, making it one of the most widely used materials in bone regeneration and orthopedic implant design.
Recognized Expertise
For over 20 years, MedicalGroup has developed strong expertise in the manufacture of hydroxyapatite powder.
Manufactured in accordance with ISO 13779-6 and ASTM F1185 standards, this production ensures optimal reproducibility and performance for orthopedic applications.
Hydroxyapatite is applied by plasma spraying.
We offer multiple particle size grades suited to various plasma spray processes, in batch sizes of up to 400 kg. The powder is delivered in 2 kg containers. The spherical particle shape ensures good flowability and reliable feeding of plasma spray systems.
After plasma spraying, hydroxyapatite yields mechanical, chemical, and morphological properties that comply with ISO 13779-2 and ASTM F1609.
Controlled Manufacturing
Manufacturing Steps
Synthesis:
The calcium and phosphate received in salt form are dissolved. The chemical reaction between the calcium and phosphate solutions produces hydroxyapatite precipitates in an aqueous phase. Precise control of the proportions of both solutions ensures an optimal Ca/P ratio.
Spray Drying:
To obtain a solid phase (powder), the liquid is atomized into droplets and then dried by a hot air stream.
Calcination :
The crystalline structure of the powder is stabilized through a heat treatment cycle.
Sieving:
Passing the powder through sieves yields the various particle size ranges.
We offer a wide range of particle size distributions, suited to plasma spraying.
We supply standard or customized distributions to meet our clients’ needs.
D10, D50, and D90 values are measured in accordance with ISO 24235 for each batch.
Quality controls performed by our laboratory ensure the compliance of our products.
We use our own HA powders to perform our own plasma spray coatings on orthopedic implants.
We supply clients who coat their implants at facilities located worldwide: USA, China, and Europe.