In the world of precision machining, the smaller the part, the bigger the challenge. That’s especially true for small bone implant components used in the hand, foot, and ankle. These parts may measure in millimeters, but the engineering behind them requires mile-wide attention to detail. At Criterion Precision Machining, we thrive on that challenge. When a surgeon relies on a screw, plate, or anchor to restore motion in a joint the size of a fingertip, “close enough” simply isn’t good enough.
When Tiny Parts Carry Big Responsibilities
Small bone and extremity implants, whether they’re plates, screws, or fixation systems, demand the same strength, biocompatibility, and reliability as their larger orthopedic counterparts. The difference? There’s far less room for error. One misplaced thread or slightly uneven surface finish can impact fixation strength or cause complications after surgery.
These micro components must balance three things simultaneously: precision, repeatability, and manufacturability. Our Swiss turning and 5-axis milling capabilities allow us to produce intricate geometries, fine threads, and clean transitions on parts smaller than a pencil eraser, all while holding tolerances within ±0.0002”.
Materials That Matter
When it comes to implant fixation hardware, material selection is critical. Titanium and stainless steel remain industry standards for strength and biocompatibility, but many of our customers are turning to high-performance polymers for specialized applications. The PEEK anchor, for example, has become a preferred choice for small bone fixation because it offers strength, radiolucency, and fatigue resistance, without interfering with imaging.
Machining PEEK and other advanced materials isn’t for the faint of heart. They require precise control of heat, feed rates, and tooling geometry to prevent microfractures or deformation. At Criterion, we’ve developed proprietary setups and inspection routines that protect material integrity from the first cut to the final inspection.
Precision Without Compromise
Our team knows that every tendon repair device, implant anchor system, or small plate we produce will eventually be part of someone’s recovery story. That’s why our entire process from quoting through shipment is built around traceability and accountability. Using ProShop ERP, we track every operation, tool, and measurement. And our ISO 13485 certification ensures full compliance with the highest medical manufacturing standards.