Why opt for a personalized hip revision?
What is the process?
± 4 WEEKS
Example of a Personalized 3D-Printed Hip Arthroplasty
This video demonstrates how Dr. Van Hellemondt and Dr. Spruit (Sint-Maartenskliniek Nijmegen, The Netherlands) performed a total hip arthroplasty to reconstruct a large acetabular defect, more specifically a Paprosky 3B defect, by implementing the Materialise aMace hip solution.
“The aMace implant was preferred over other solutions because it offers a complete solution, much more patient-specific than any other commercially available implant, through calculations – scientifically validated by peer-reviewed research - of the optimal implant thickness and strength, best position of screws according to bone quality and analysis of the impact on biomechanical functioning of a specific patient. This solution offers the possibility to regain full quality of life for patients with complex acetabular defects, lowers the risk of re-revisions, immobility and permanent care.”
“Does what it says on the tin. Interfacing with the engineers is straightforward and first rate, leaving you with a sense of confidence, which is an important part of a surgeon’s pre-operative approach to these challenging cases. The preoperative planning allows you to have the flexibility of thinking on beforehand. It was a game-changing procedure for me and takes the stress out of it. It speeds everything up.”
“The major benefit is the preoperative planning and defect analysis that really prepares one for surgery. No surprises during surgery is great! The difference to off-the-shelf products is that Materialise aMace is customized to the defect instead of customizing a defect to the implant. My first case has 6 years follow-up and he is still doing great!”
“I was confident that the aMace implant was the right choice for my patient because of the attention for the biomechanical aspect in the design of the implant. Materialise showed me my patient’s bone quality, designed the implant and positioned the screws accordingly. This smooth cooperation with the Materialise team resulted in a swift operation and a faster recovery for my patient.”
“To me, reducing your surgical time is an important advantage of these custom-made implants. I’m very well prepared before I go into an operation. It’s like having a manual: I know what to do, I know the bone quality, I know the good and the bad parts of the pelvis. On top of that, I hold accurate models of the hemi-pelvis in my hands. They’re extremely handy as I can look at them while simultaneously looking down into the wounds. Additionally, the drill guides give me confidence about the positioning of the screws, which helps saving time as well. And the implant is patient-specific, so I don’t have to bend flanges or anything. Having the anatomic reconstruction planned before the operation means you need less instrumentation and fewer trials because you already know which implant you’re going to use. Less work for the nurses!”
Frequently asked questions
- Getting started
- Planning and Ordering platform
For which patient and for which indications is this technology suitable?
We see that most patient cases are Paprosky IIIA and IIIB types, however, the advantageous Materialise acetabular system has been used in type II, dysplastic and tumor cases as well. It is intended for revision surgeries as well as primary surgeries. And naturally, as the implant is 3D printed and custom-made for each patient, it is not limited to severe cases. It can fit any defect. The medical indications can be summarized as follows:done Non-inflammatory degenerative joint disease including osteoarthritis and avascular necrosisdone Posttraumatic and rheumatoid arthritisdone Correction of functional deformitydone Revision procedures where other treatments or devices have faileddone Treatment in conjunction with tumor resection where bone stock is of poor quality or is inadequate for other reconstructive techniques as indicated by deficiencies of the acetabulum
Why choose a custom solution over a standard implant?
Although a standard solution may be the best one for a standard case, a patient-specific implant is often better suited for more challenging defects. With a Materialise aMace solution, you receive an implant which is pre-operatively designed to match the patient, and optimized for stability and biomechanical performance, resulting in a 98% implant survival. With the implant, you receive patient-specific drill guides, an extensive unique 3D analysis of the acetabular defect and planning for your surgery.
Compared to standard implants, whose multiple components need to be pieced intra-operatively, under stress and time pressure, thus jeopardizing the performance, our one-piece solution eliminates the entire process of selection and assembly, and the risks of intercomponent movements altogether.
In addition, Materialise aMace comes with an exclusive team of clinical engineers, always there for you to discuss the implant design and surgical planning. This gives you the assurance and confidence that the operation will be without surprises.
Contrary to standard implants where the cost can increase over time depending on the clinical outcome, the cost is calculated upfront. The transparency and high-tech value of the experience makes it a trustworthy technical and reliable solution. After having compared alternative solutions on the market, we've seen that preliminary data suggests that the aMace is a more cost-effective solution to treat complex acetabular defects.
Is there evidence on patient-specific implants? Can I trust it?
Materialise has 10 years of experience in treating arthroplasty cases, 27 years of experience in the 3D software business and has already created more than 350,000 patient-specific guides and implants.
More than 700 patients worldwide were helped with this patient-specific hip implant so far. We currently have published evidence on 10% of our total experience. The results are very reassuring: the published follow-up data (mean follow-up of 2 years, which is the typical timeframe for early failures) result in 98% implant survival3 rate and 100% improved patient outcome4.
In which country is the product available?Currently, Materialise aMace is sold directly in Australia and Europe (Austria, Belgium, Finland, France, Germany, Ireland, the Netherlands, Norway, Sweden and United Kingdom). In Poland, our solution is sold through a distributor. It is not yet commercially available in Canada and the US.
What's the reimbursement process?
Reimbursement processes differ per country. They are dependent on legislation or on hospitals' contracts with insurance companies, DRG systems or special funds.
If you would like to know the specific reimbursement possibilities applicable to your country even before the planning phase, contact us and we will inform you right away.
What is the price?
If I have an interesting case, to whom should I reach out to ask for more information on the process and pricing?
Can I plan my own clinical cases in a hospital and ask Materialise to provide guides and/or implants?
No, we do not provide unique printing services as we consider the planning and design an integral part of the quality assurance of our products.
What are the advantages of a trabecular structure in an implant?
Osseointegration (the potential for bone in-growth) is the most important advantage, but there are more reasons to opt for a porous structure. The material properties of the porous structure better match the mechanical properties of the bone. The supporting trabecular augment is made of a highly biocompatible material: Ti6AI4V ELI (a titanium alloy). The back of the light-weighted integrated cup and flanges consist of a porous structure that mimics bone properties designed to improve secondary fixation through bone ongrowth. In addition, given the potential large size of the defect-filling implants, porous structures allow to reduce the total weight of the implant.
Is the implant sterile upon delivery?
The implant and accessories are always delivered non-sterile, so you can feel the parts upfront and prepare yourself better for surgery. Together with the package you will receive the sterilization instructions that clearly explain how the implant should be sterilized at the hospital. If you would want to look into them, contact your local sales representative in one of our offices or email to email@example.com.
Do you provide screws with your implant?No, we don’t. In the planning report, you will find the number of screws and screw lengths we recommend to use. The aMace solution is compatible with titanium spongiosa (6.5 mm diameter) screws with maximal head height 4.8 mm and head diameter between 7.6 and 8 mm. Based on the screw planning we provide, you’ll know well in advance how many and what sizes you will need, so the team is fully prepared before surgery.
How do I access Materialise SurgiCase?
SurgiCase is a case management system that enables clinicians to totally streamline and simplify the planning and ordering of patient-specific guides and implants. The goal is to let you give your full attention to clinical treatment, and safely outsource all the technical aspects to experienced specialists at Materialise.
It is a web-based tool, accessible by our customers on account login. To get access to this platform, please fill in this contact form. Once your account is set, you can open a web browser on your device and go to https://surgicaseoos.materialise.com to login.
How do I upload my image data?
Image data is uploaded directly to the patient case via Materialise SurgiCase. Image upload can be done by a surgeon, radiology or other staff. Please refer to the SurgiCase User Guide for Image Upload in the “Help” menu in the SurgiCase platform for more information.
How long will it take to get my implant and accessories?
If your CT scans meet the requirements stipulated by the Materialise Scan Protocol Hip, we immediately start with the 3D analysis. You can expect to our 3D analysis, plan and implant design proposal within 5 working days from the upload of acceptable images. This process time depends on your availability to provide feedback on the surgical plan. After final approval of the implant design, production takes about 4 weeks.
Do the implant and accessories expire?
It is advised to use the guides, implant and models within 6 months of performing the CT scans on which they are based. If the patient’s anatomy has changed significantly since the time of the CT scan, the guides, models and implant should not be used, even if the time period of 6 months has not expired.
What is the difference between the planning report and the case report?
The Planning Report is an intermediate report that is used for discussion purposes. This report contains an implant proposal that can still differ from the final implant.
Before surgery the Case Report will be available in the Action Center of the case in our SurgiCase platform. This is the final report and contains all information on the case. The Case Report is to be used in preparation of and during surgery in combination with the surgical poster.