What Makes This One New
We previously used a flame-polished edge that required removing the protective film at the first stage of production. That made it nearly impossible to protect the acrylic from scratches during assembly, and it created unnecessary waste — we tossed a lot of scratched acrylic.
In one recent instance, flame-polished edges combined with certain cleaning practices and solutions caused “crazing” — micro-cracking along the edges. That’s resolved now. The new edge finish eliminates both problems.
Full Specifications
- Base type: Acrylic, free-standing
- Surface: Horizontal — X-ray table, bucky tray, or slid beneath the patient
- Arm length: 24″
- Arm weight: 7.5 oz
- Total weight: 24 oz
- Minimum radius: 4.5″
- Ball: 25.4 mm (1″) solid 316 stainless steel
- Warranty: 1 year against manufacturer defects
- Country of origin: Designed and assembled in the USA
The stainless steel calibration ball is solid — it doesn’t degrade when surrounded by larger body mass, and it won’t distort in digital X-ray imaging.
Why a 25.4 mm Calibration Sphere?
Surgical templating software needs a known reference object in the image to calculate magnification. A 1-inch (25.4 mm) solid sphere is the standard because it presents the same diameter regardless of imaging angle — unlike a disc or coin, which can appear elliptical if tilted. Position it at the anatomical plane of the joint, and the software does the rest. Skip the marker, and you’re guessing on implant size.
OrthoMark has been doing this job for over 20 years. The calibration ball is compatible with all major orthopedic and veterinary surgical templating platforms.
Need a Different Mount?
Every OrthoMark uses the same 25.4 mm calibration ball and adjustable arm. The only thing that changes is how it attaches:
- OM-1002 — Magnetic base for ferrous surfaces
- OM-1003 — Suction cup for smooth, non-porous surfaces
- OM-1004 — Twist-action suction cup for smooth, non-porous surfaces
- OM-1006 — Short & Quick suction mount
- OM-1008 — Strap model for patient-worn use
- OM-1009 — Lever-action 2.7″ suction mount
- OM-1010 — Super 2.9″ plunger suction mount
- OM-1011 — Large clamp base
- OM-1012 — Small clamp base for grab handles and rails
