Case StudiesMedical AMOrthopedic Implants

Arcam EBM systems produced over 100,000 3D printed hip cups since 2007

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Implanting 3D printed parts into a human body was a rarity back in 2007, until Italian surgeon Dr. Guido Grappiolo implanted the world’s first 3D-printed hip cup, the Delta-TT Cup, in a patient with advanced arthritis who needed a hip replacement. The surgeon joined forces with orthopedic implant maker LimaCorporate and 3D printer manufacturer Arcam, now part of GE Additive, for the landmark operation. Since then it is estimated that more than 100,000 3D printed hip cups have been made in Arcam printers and implanted in patients.
With their help, he implanted the world’s first 3D printed hip cup, the Delta-TT Cup. The TT stands for “Trabecular Titanium” a biomaterial “characterized by a regular, three-dimensional, hexagonal cell structure that imitates trabecular bone morphology,” according to LimaCorporate.

A few months after the operation, Grappiolo looked at a CT scan of the patient and saw that her bone tissue had already started to grow into the 3D-printed hexagonal cells of the implant. “From a technical point of view, we immediately got a good feeling of stability,” he said in a recent video interview, when asked to recall how the surgery went.

Grappiolo, who caught up with his female patient from 10 years ago to record the video, asked her to bend her leg back toward her chest. Then, he helped her rotate it.

“The first patient is doing extremely well,” he said.

How long will a 3D printed hip last? As yet there’s no frame of reference. But signs are good, considering Grappiolo’s patient is still going strong, as are many others. The surgeon has since implanted close to 600 hip cups — his group has implanted over 1,500 — that were created by 3D printers made by the likes of Arcam. He believes the devices could last “a lifetime.” Many other doctors worldwide use the 3D-printed Delta-TT cup for their daily practice, resulting in thousands of implants used in patients since the first implant. That promises an improvement on conventionally manufactured implants.

It wouldn’t be unusual for someone with a traditional hip operation to get their implant replaced after 10 to 15 years, says Maria Pettersson, an orthopedic industry specialist with Arcam. Commonly, they could stretch that to well over 20 years, she says.

Orthopedic implant makers like LimaCorporate can also customize the design of the final implant according to the patient’s and surgeon’s needs, keeping the same features of the original structure, including the complex 3-dimensional hexagonal cells on the surface.

3D printed hip cups

This level of design freedom and the ability to potentially tailor implants to different patient’s necessities is why 3D printing also increasingly is being used for dental implants, hearing aids, prosthetics and even surgical tools. Pettersson estimates that overall more than 100,000 hip cups have been made in Arcam printers and implanted in patients. There are likely hundreds of thousands more that have been made in printers from other companies.

While that is still a minor proportion of the overall number of hip replacements that hospitals are carrying out today, the demand from surgeons and manufacturers is growing, says Pettersson.

“If you’re not in it, you realize you’re behind.”

 A decade later, the patient is still doing extremely well. Since this first patient, Grappiolo has implanted close to 600 3D-printed hip cups, and his group has implanted over 1,500. While it wouldn’t be unusual for someone with a traditional hip operation to get their implant replaced after 10 to 15 years, specialists believe their 3D-printed parts could stretch that to well over 20 years. Grappiolo believes the devices could last “a lifetime.”
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Davide Sher

Since 2002, Davide has built up extensive experience as a technology journalist, market analyst and consultant for the additive manufacturing industry. Born in Milan, Italy, he spent 12 years in the United States, where he completed his studies at SUNY USB. As a journalist covering the tech and videogame industry for over 10 years, he began covering the AM industry in 2013, first as an international journalist and subsequently as a market analyst, focusing on the additive manufacturing industry and relative vertical markets. In 2016 he co-founded London-based 3dpbm. Today the company publishes the leading news and insights websites 3D Printing Media Network and Replicatore, as well as 3D Printing Business Directory, the largest global directory of companies in the additive manufacturing industry.

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