Limber Prosthetics, a San Diego startup, advertises its Px1 prosthetic leg for as little as $3,000, according to San Diego Magazine. The outlet reported that Limber has produced roughly 800 devices, each a one-piece 3D-printed prosthesis.
The design story, along with patient accounts from Mark Wright and Courtney Wilkin, was detailed by San Diego Magazine, which reported that Limber was founded by Luca De Vivo Nicoloso, Joshua Pelz, and certified prosthetist Herb Barrack. According to the magazine, Pelz built the company's first 3D printer in his own garage, a scrappy origin for a device now reaching patients far beyond San Diego County.
From Prototype to Production
San Diego Magazine traced Limber's origins to recurring Ensenada visits by its founders. The outlet reported that Limber's first prosthetic limbs from that period are nearing five years old and remain in daily use in Mexico; the company continues to provide below-the-knee prostheses to patients in Ensenada.
Tech Briefs reported that Limber aimed to begin U.S. sales in the first quarter of 2024. Institutional milestones predated that planned launch: UC San Diego Today reported that the university made a $250,000 direct seed investment in Limber in June 2023 — the first time a UC campus had directly invested seed capital in one of its own spinoff startups. Limber also originated from research in structural engineering professor Falko Kuester's lab at UC San Diego, according to the same report and corroborated by Tech Briefs.
A Manufacturing Model Built Around Fit
Tech Briefs reported that Limber's U.S. process could take one to two days from scan to delivery. The company uses a proprietary filament and custom-builds each leg from socket to foot. The magazine also described a clinical app that scans an existing prosthetic to check fit and alignment before the team designs a digital copy of the socket.
That digital-fitting approach lines up with manufacturing details reported separately by Tech Briefs, which described Limber's process using smartphone facial-recognition cameras to digitally capture a patient's residual limb, enabling a custom-fit digital twin socket and monolithic limb to be printed in roughly 12 hours. Limber's digital-twinning approach is designed to produce a custom-fit socket.
Patient Experiences Reported by the Magazine
San Diego Magazine reported on two patients' experiences. Mark Wright was injured in a motorcycle crash on a Temecula-area route in March 2022 and treated at Scripps Mercy Hospital. After two weeks of surgeries for a fractured pelvis and injuries to his lower left leg, his leg was amputated. The magazine also reported that Courtney Wilkin lost a leg after an accident at age 17.
The magazine also reported that an 11-year-old amputee in Chula Vista tested the UniLeg, an earlier research version of the device.
Clinical Testing and Regulatory Milestones
The UniLeg passed ISO 10328:2016 structural and durability standards in August 2024, according to Limber Prosthetics, withstanding 3 million cycles each of heel and forefoot loading for patients weighing up to 275 pounds.
The UniLeg, an earlier research version of the device, was described as a world-first single-piece 3D-printed below-the-knee limb. The Px1 comes in nine colors and can be configured for different activity levels, per San Diego Magazine's reporting.
What Medicare Coverage Means for Patients
According to Medicare.gov, Part B covers medically necessary artificial limbs when ordered by a health care provider. After the Part B deductible, beneficiaries generally pay 20% of the Medicare-approved amount. That general coverage rule does not establish whether Medicare covers Limber’s Px1 or mean that a patient’s cost will match the device’s advertised price.
Reported Users and International Programs
UC San Diego reported that LIMBER provided five prostheses to victims of the war in Ukraine.
Rehabilitation Needs in Ukraine
Separate reporting gives a sense of the wider need for prosthetic and rehabilitation services. Malteser International said its Lviv project had supplied 220 people from various Ukrainian regions with 244 prostheses as of March 2024.
The scale of the underlying need is stark. Tech Briefs reports that nine out of ten amputees worldwide lack access to a proper prosthetic.
