Precision in the manufacturing of medical implants is a matter of critical functional necessity, as these components must integrate seamlessly with the human body. Proper and accurate inspection of every part is a vital safeguard against mechanical failure or physiological rejection. For an implant—such as a femoral stem, for example — to function correctly, its geometric features must adhere to extremely tight tolerances. If a taper fit is slightly off or a screw thread is incorrectly pitched, the resulting instability can lead to aseptic loosening, unnecessary bone resorption, or the structural collapse of the implant, necessitating painful and risky revision surgeries.
Proper and full inspection are also essential to validate that every piece meets the rigorous regulatory standards and bio-mechanical specifications required to guarantee patient safety and long-term clinical success.
One of the difficulties in verifying these parts lies in the geometric complexity and material properties of modern implants. Many feature organic, non-prismatic shapes designed to mimic human anatomy, which are notoriously difficult to measure using standard gauges or calipers. Furthermore, the use of specialized textures, such as porous plasma-sprayed coatings intended to encourage bone ingrowth, creates “noisy” surfaces that can confuse optical sensors or snag physical probes. Meeting all the medical industry’s requirements in a high-volume production environment represents a further significant challenge.
The VisionGauge® Digital Optical Comparator was developed in close collaboration with a large medical OEM, to meet the medical industry’s inspection and measurement requirements. It’s fast, accurate, produces operator-independent results, and is designed to be used directly on the shop floor. Furthermore, it has patented software tools that are perfect for the inspection of medical parts.
The VisionGauge® Digital Optical Comparator is used by a great many medical device manufacturers worldwide, both large & small, to solve a wide range of applications, including:
Orthopedic implants are common throughout the body, from knees to shoulders. Each implant’s specifications depend on its purpose. Through inspection, manufacturers can confirm that implants are free of defects and aligned with the relevant standards.
Medical bone screws are instrumental in fixing fractures together for proper healing. The spacing and pitch of each thread are critical, so medical device parts inspection requires specialized tools.
From total hip replacements to facial reconstruction implants, many medical devices are made with plastic and polymer. These materials allow for the fabrication of complex parts with unique geometries, but they can add glare and reflections that make inspections challenging with traditional optical comparators.
Like implants, medical rasps and other surgical tools have little room for manufacturing errors. The height, spacing, angle, and bottom radius of each tooth must be within the appropriate tolerance band.
The instruments and tools used in medical and surgical procedures are also subject to strict quality standards to ensure all their design requirements and dimensional characteristics are to specification.
Stents call for critical precision due to their placement in the human body. Unbiased stent measurement tools are key to inspecting them quickly and accurately.
VISIONx, Inc. provides a range of digital optical comparators in vertical and horizontal configurations to accommodate multiple applications. These systems are ideal for orthopedic parts inspection and medical device parts inspection, helping manufacturers streamline the process while lowering costs and improving product quality.
The VisionGauge® Digital Optical Comparator line offers increased accuracy, higher throughput, and a smaller footprint than traditional comparators and other existing technology. VisionGauge® systems compare medical devices and components directly against their CAD data to ensure compliance. These tools issue results in the form of Pass or Fail / Go or No-Go to simplify the inspection process.
Manufacturers can also use the VisionGauge® Tooth Checker™ for medical rasps, bone screws, and other devices and components with teeth or threads. The tool automatically locates crests, roots, or both and determines whether they are in tolerance and safe for use. Additional screw threads measurements tools are also available to reliably and quickly measure and report screw dimensions.
VisionGauge® system validation is straightforward to ensure all industry and governing body requirements and standards are met. VisionGauge® medical equipment inspection systems are also fully capable of collecting complete electronic documentation for device history.
The 500 Series Digital Optical Comparator sets the standard for optical quality control equipment everywhere. This machine can handle almost any demand thanks to its high efficiency, user-friendly design and precision optics.
Are you interested in streamlining your inspection process with VisionGauge® Digital Optical Comparators and optical measuring systems? As your vision inspection system manufacturer, we’re available to provide support at any time, so browse our selection of products or contact us online today.
Learn More
