Therasys Bone Screw Set

A new standard for
bone cysts.

Introducing Therasys — the worlds first 3D printed customised titanium bone screw for bone cysts with variable pores and custom equipment for the veterinary medicine.
No 2nd operation needed.

3D printed Titanium Ti64.

Customised screw to your needs.

New torx adapter and bit.

Head adapter for long term medication.

Watch the 3D surgery animation


An innovative new bone screw.

Therasys is a 3D printed bone screw made from Titanium Ti64 with a porous structure that can be customised to your needs. No 2nd operation needed due to inert material and bioadhesive property.
The head with torx design allows for a higher torque to be exerted than a similarly sized conventional hex socket head without damaging the head and/or the tool.
The cannulated design offers injections of biologicals like growth factors into the region of interest. More pasty bone fillers can be filled after drilling and be added to this technique.
The first 3D printed thread which is self taping in juvenile bone.


Therasys Screw Bit
Our special screw head design reflects input from modern craftsmanship and engeneering. The torx is far superior over conventional hexagon screwdrivers. Thus we created an adaptor for conventional screw drivers fitting our system.
Therasys Screw in 3 Pore Sizes
Three different pore sizes offer variability for different kind of biologicals for the area of interest.
Therasys Head Adapter System
For longtime treatments a standard connecting PVC tube can be connected. With the little anvil and the connector ring the sterile tubing is fixed safely. Once closed, medications can be applied intra-osseously through the tubing as long as needed.
Therasys Countersink
The countersink cutter fits your hexagon screwdriver and will create a perfect fitted hole for the Therasys screw head.


Laptop Video Player
Therasys is a customisable bone screw tailored to your needs. By using our simple-to-use configurator you can design the Therasys screw exactly as you need it. All you need to do is to drag a few sliders and click a few buttons.
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Case studies

Extremely large cyst in the medial femoral condyle. Standard lag technique: Drilled with 4.5mm in the trans cortex reaching the cyst. Drilling the cys cortex with 3.2mm. Because of age and hardness of bone threading necessary. Inserting over switching stick innotere connector for prefilling of cyst and the application of the screw. Post operatively most of the bone cement had sintered through the connection into the joint. Nevertheless after six weeks clinically lame free and very satisfying bone remodelling in such a short time.
Challenging joint near sub chondral bone cyst in elbow. More soft tissue between skin and bone thus cannulated head adapter makes the difference. Injections with biologics can go through the cannulation of the head adapter instead of loosing the screw head in the soft tissue and thus loosing time. Horse lame free after 4 weeks.
Extremely large P2 cyst. Verified with radiographs and CT. Due to size and location drilled obliquely. After reaching the cyst it was prefilled with Arthrex Innotere and then the screw was inserted. End filling was performed through the canal with PRP.
Very lame heavily pre treated with corticosteroids, and biologics including PAAHG gel. Considered by home vet not a surgical case due to size and location of cyst in the sagittal ridge. During surgery drilled the tip of the cyst to not come to close to the joint. The fit of the screw we were happy with. Clinically this horse resolved lameness after 4 months and is now back in full work.


Injections of biologicals.

PVC Tube
Connect a standard PVC tube to the tube adapter ring or insert an injection needle directly into the screw canal.
Tube Adapter
The 3D printed tube adapter fits the torx screw head and fixates a plastic tubing for longterm injection of biologicals.
Various Pores
With the various pores on the shaft of the screw the biologicals can be injected directly into the area of interest. Long term treatment is thus achievable. All orthobiologics available can be injected.

Marc Koene
Tierklinik Lüsche

DVM Board cert.
Equine spec.

After identifying the need for a new therapy concept in subchondral bone cyst the paper from Dr. Santchi and her group inspired me to develop this new Titanium therapy concept with r3volutionD. The first results are very convincing no matter what anatomic location or indication. I've used it mainly for bone cysts and fissure fractures. Now I'm starting to test them on osteomyelitis and bone edema.

Jörg Jähn
Tierklinik Königslutter


Today I reviewed the horse where a complicated joint near subchondral bone cyst was operated on the front left with the 3D printed Titanium Ti 64 therapy concept. The radiological result looks very impressive, the horse is lame free and the owners are very happy.

Try out our configurator

Upload a X-ray or CT image and customise the Therasys screw to your needs.

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Therasys Bone Screw in iPhoneTherasys Bone Screw in iPhone

Use Augmented Reality to see Therasys

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Frequently asked questions
What is the difference between titanium and steel?

Steel is still the standard for implants. It is very stable, easy to sterilise and cheap to produce. However it creates a bio film which can lead to implant failure and has negative effects with imaging and allergies. Titanium is half the weight of steel, a little more rigid, but has osteoinductive capacity. Since it is completely inert, the surrounding bone will integrate the screw entirely without biofilm.

Is the handling the same in surgery?

There is a certain learning curve handling titanium screws. Metallic screws tend to squeak before they break, titanium does not. The torsion resistance of a screw needs between 5-7 Nm. Our titanium screw holds up to 12 Nm torsional strength.

How do we sterilize the screws?

Standard sterilisation procedures all work for titanium screws and the therasys equipment. After contact with air i.e. oxygen, the screw turns a little darker due to oxidisation. This improves osseous integration.

What kind of orthobiologicals can you inject with Therasys?

In fact all orthobiologics available can be injected with a syringe or through the connector kit in to the target area. Only bone fillers which are too pasty have to be adapted into the process before fitting in the screw. Meaning, after drilling a cyst in lag technique a switching stick or Steinmann Pin will be inserted into the cyst. If you use Innotere (Arthrex), the plastic tube coming along will be applied over the pin into the cyst and connected to the syringe. After deploying the cement into the cyst the Therasys screw is inserted.

What if I need to treat the bone for several days?

The insertion of the screw is as described in the video. A standard plastic tubing can be cut with a scissor and applied to the head of the screw and fixed using the tube adapter and tube fixator. Skin and subcutus are closed either with suture material or staples and the infusion tubing is integrated in the bandage. Through the tubing liquid materials like antibiotics can be introduce into the bone as often as needed. Once the therapy is finished by simply pulling the tubing the infusion line is removed.