How to Go Plaster-Free in Your O&P Workshop

Going plaster-free doesn't mean relearning your profession. Your clinical decisions and diagnostic fittings stay exactly the same. Only the starting point changes: a 3D scan instead of a plaster cast, leading to a faster, cleaner, and more reproducible workflow. Here is what that transition actually looks like in the workshop.

1. Master the scan before the software

The classic mistake when going digital is rushing into CAD. The scan is your starting point: good data in yields good data out. Scanners from the Shining 3D line (EinScan H2, Einstar) as well as the Medixa are perfectly suited and pre-configured in the VYTRUVE platform. The system remains open: many other hardware models are fully compatible depending on your budget and needs.

Once equipped, the focus is purely on your technique: patient positioning, capturing bony prominences, and managing movement artifacts.

• For Transtibial: scan directly over a liner to contain the soft tissue and capture the stabilized volume of the residual limb.
• For Transfemoral: use a two-scan protocol with the VTF tool to capture ischial containment under true weight-bearing, something a single scan simply cannot do.

2. Modify like a clinician, not a programmer

CAD modification with VYTRUVE mirrors the physical logic of the workshop: add reliefs for pressure areas, build up volume, adjust the wings, and align the foot with the socket. The first patient takes a little extra time, simply because you are translating your physical workshop habits to a screen. The biggest upgrade? The "Undo" button. It completely removes the stress of taking off too much plaster with the surform file.

3. Choose your production route

• VYTRUVE Central Fabrication: the printed check socket is delivered in 72 hours as standard, or 48 hours express on transtibial and upper limb. Transfemoral and sub-ischial sockets stay at 72 hours. Perfect for getting started without hardware investments.
• In-House Printer (Vprint): validate your modification at the end of the day, let it print overnight, and the socket is ready for fitting the next morning. Its build volume (30x60 cm) covers the vast majority of lower limb prosthetics.

Many clinics start with outsourcing to central fabrication before bringing a printer in-house once their volume grows.

4. The diagnostic fitting: nothing changes

The fitting process remains identical. The check socket arrives in clear PETG. You visually assess skin contact, check the wings, and evaluate dynamic alignment. If adjustments are needed, PETG responds perfectly to a heat gun, just like standard thermoplastics. The real difference happens after the fitting: any clinical modification can be updated in your 3D file. When the patient returns in six months for a new socket, you start from a validated baseline, not a blank slate.

5. Moving to Transfemoral

Most CPOs transition to above-knee cases after just 2 to 4 weeks of transtibial practice. The VTF tool scanning protocol is learned quickly, and the modification logic is exactly the same. The same applies to sub-ischial sockets scanned directly over a silicone brim.

6. The definitive socket: carbon or direct 3D printing

• Carbon lamination (Vtransfer process): scan the check socket directly on its transfer plate. The system generates a PETG positive model that replicates the exact internal shape and alignment, ready for standard carbon lamination. No pouring wet plaster, and the hollow design allows clean demolding.
• 3D-printed definitive (EVERvy Essential range): order a direct 3D-printed definitive socket. Using MJF technology and PA12S material, it offers high resistance, durability, and a lightweight design with a clean black finish that requires no further processing.

Summary

Going plaster-free isn't a leap of faith; it's a sequence of practical steps. The scanner replaces the plaster cast, CAD replaces the surform file, and the 3D-printed positive or socket replaces the heavy plaster model. Your clinical judgment remains 100% yours, with one major advantage: you save precious workshop time to focus entirely on patient care.

VYTRUVE is accessible at app.vytruve.com. Patient creation and digital modification are included at no cost.