Engineered to restore anatomical radiocapitellar articulation, provide primary valgus stability, and prevent proximal radial migration in Mason Type III/IV fractures and Essex-Lopresti injuries.
Modular Unipolar & Bipolar
CoCrMo / Ti-6Al-4V ELI
Press-Fit & Cemented Options
The Radial Head Replacement System represents a pivotal advancement in complex elbow trauma management, offering a definitive reconstructive solution when internal fixation of comminuted radial head fractures proves unfeasible. The radial head serves as a critical secondary stabilizer of the elbow joint against valgus stress and plays a primary role in resisting proximal displacement of the radius along the interosseous membrane (IOM). In severe traumatic events—such as Mason Type III (comminuted, displaced fractures) and Mason Type IV fractures accompanied by elbow dislocation, as well as complex Essex-Lopresti lesions—excision of the radial head without replacement leads to catastrophic biomechanical sequelae, including chronic elbow instability, valgus deformity, secondary osteoarthrosis of the trochlear-ulnar joint, and debilitating wrist pain secondary to longitudinal radio-ulnar dissociation.
Auxein Medical’s continuous commitment to clinical research and precision biomechanical engineering has resulted in a comprehensive Radial Head Replacement System designed to precisely restore anatomical length, preserve capitellar cartilage health, and facilitate immediate post-operative rehabilitation. Designed for global healthcare systems, orthopedic trauma centers, and tender procurement officers, our modular implant portfolio combines high-grade biomaterials with an intuitive, color-coded surgical tray that drastically reduces intra-operative trial time while maximizing surgical reproducibility.
When medial collateral ligament (MCL) integrity is compromised alongside a comminuted radial head fracture (the classic "Terrible Triad" injury of the elbow), the radial head transforms from a secondary stabilizer into the primary load-bearing structure preventing valgus collapse. Excision alone leads to early construct failure. Resection arthroplasty with an anatomically matched modular radial head prosthesis restores native radiocapitellar joint kinematics and protects soft tissue repairs during early active range-of-motion recovery.
Native radial head morphology features a subtle non-circular (elliptical) cross-section and an inclined concave articulation matching the spherical geometry of the humeral capitellum. Auxein’s engineering team utilized extensive three-dimensional CT morphological databases across multi-ethnic populations to create an optimized dish concavity and stem taper matrix.
By engineering smooth, mirror-polished Cobalt-Chromium-Molybdenum (CoCrMo) articulating heads and titanium alloy stems, our replacement system minimizes friction coefficients against capitellar cartilage, preventing early erosion while transferring physiological loads evenly down the radial shaft to prevent stress shielding.
Modern trauma surgery demands intra-operative versatility. A single fixed-body prosthesis cannot accommodate the vast anatomical variations encountered in emergency trauma theatres. Auxein's Radial Head Replacement System is built around a fully modular architecture, allowing independent selection of the radial head component, neck height collar, and intramedullary stem diameter. This independent sizing matrix enables trauma surgeons to accurately reconstruct the patient's unique joint geometry without over-stuffing or under-sizing the radiocapitellar space.
Our system provides surgeons with the choice between Unipolar rigid-lock components and Bipolar self-aligning floating head designs:
| Component Parameter | Specification / Range | Biomaterial Standard | Surgical & Kinematic Advantage |
|---|---|---|---|
| Radial Head Diameters | 18 mm to 24 mm (2 mm increments) | CoCrMo Alloy (ISO 5832-12 / ASTM F75) | Accurate coverage of capitellar contact surface; prevents rim impingement. |
| Radial Head Heights | 8 mm to 14 mm (Anatomic Dish Depth) | CoCrMo Alloy / UHMWPE Core | Restores lateral column height; prevents joint over-stuffing and stiffness. |
| Stem Diameters | 6 mm to 12 mm (1 mm incremental sizes) | Titanium Alloy Ti-6Al-4V ELI (ISO 5832-3) | Provides stable intramedullary fit across diverse radial canal anatomy. |
| Stem Lengths | Standard (22mm) & Extended (32mm) | Ti-6Al-4V ELI (Micro-Textured) | Accommodates low radial neck fractures and revision trauma cases. |
| Coupling Mechanism | Precision Morse Taper with Locking Screw | Titanium Alloy / Stainless Steel 316L | Eliminates micro-motion, prevents fretting corrosion and disassembly. |
| Surface Polish | Ra < 0.02 µm Ultra-Low Surface Roughness | Electropolished Cobalt-Chrome | Minimizes friction coefficient against native capitellar cartilage. |
The field of elbow joint arthroplasty has undergone rapid evolution over the past decade. Historical monoblock designs, often cast from rigid stainless steel without precise anatomical sizing, frequently resulted in radiocapitellar arthritis, stem loosening, and painful capitellar erosion. Auxein’s global R&D engineering division has addressed these clinical pain points through three core technical innovations integrated into our current generation Radial Head Replacement System:
Through finite element analysis (FEA) and computational fluid dynamics, Auxein engineers contoured the superior concave dish of the radial head component. This optimization redistributes peak contact pressures evenly across the capitellum during 0° to 140° flexion, avoiding point-loading and cartilage degeneration.
Rigid stems can shield proximal cortical bone from physiological loads, leading to osteolysis and bone resorption around the radial neck. Auxein utilizes Titanium alloy (Ti-6Al-4V ELI) with an elasticity modulus closer to human cortical bone, combined with a smooth-tapered or micro-textured stem surface that promotes stable positioning without aggressive rigid fixation.
Surgical precision depends on instrument reliability. Auxein’s instrumentation tray features color-coded head/stem trial rasps, depth gauges, and alignment guides. Surgeons can perform precise sequential reaming and trial sizing to verify radiocapitellar tracking prior to final implant seating.
One of the most frequent surgical errors in radial head replacement is over-stuffing the joint—inserting an overly thick head component that lengthens the radius relative to the ulna. Over-stuffing elevates radiocapitellar pressure, causes capitellar erosion, restricts elbow extension, and leads to rapid joint stiffness.
Auxein’s system includes precise intra-operative measuring blocks and laser-etched anatomical trial gauges that allow surgeons to reference the proximal edge of the lesser sigmoid notch of the ulna. This ensures exact restoration of the humeroradial joint line to within sub-millimeter tolerances.
As healthcare systems worldwide adapt to tightening budgets, regulatory overhaul, and supply chain disruptions, procurement directors, hospital purchasing committees, and medical device distributors are re-evaluating their sourcing strategies. Sourcing high-acuity trauma implants like the Radial Head Replacement System requires balancing top-tier clinical safety with sustainable supply chain economics. Below are the key global procurement trends identified by industry analysts:
With the transition from MDD to EU-MDR 2017/745 in Europe and stricter FDA 510(k) post-market surveillance requirements in North America, many legacy orthopedic manufacturers are trimming their product portfolios or raising prices significantly. Global distributors are actively seeking manufacturing partners who possess full regulatory compliance, robust clinical evaluation reports (CER), and audited ISO 13485:2016 quality systems. Auxein Medical maintains complete, verified certification portfolios across CE, US FDA 510(k), MDSAP (Medical Device Single Audit Program), and Indian FDA, guaranteeing uninterrupted product supply for international government tenders and private hospital networks.
Hospitals cannot afford to store massive inventory footprints of single-use, non-modular prostheses. Modern orthopedic procurement prioritizes multi-functional modular systems where a single compact instrument container supports both unipolar and bipolar configurations across a full range of patient sizes. Auxein’s streamlined trial and implant trays reduce instrument processing and sterilization overhead for central sterile processing departments (SPD), driving down total cost of care.
Healthcare providers are increasingly bypassing multi-tiered distribution markups by partnering directly with established medical device manufacturers capable of offering private labeling, custom tray configurations, and OEM supply contracts. Auxein operates state-of-the-art manufacturing facilities in Kundli, Haryana, India, outfitted with 5-axis CNC Swiss machining centers, automated coordinate measuring machines (CMM), and ISO Class 7 cleanrooms, giving global partners high-volume supply reliability with unmatched cost competitiveness.
Auxein Medical is not simply an orthopedic vendor; we are a globally recognized research and manufacturing powerhouse dedicated to elevating patient care standards. For over a decade, our products have restored movement for millions of patients across 75+ countries. Here is why orthopedic distributors and medical institutions choose Auxein as their preferred trauma and arthroplasty partner:
Certified under ISO 13485:2016, US FDA 510(k), CE Mark, MDSAP, and EU-MDR. Every radial head stem and head component undergoes 100% optical dimension scanning and ultrasonic cleaning.
With strategic corporate offices and distribution logistics in India, the United States (Doral, FL), Mexico (CDMX), UAE (Dubai South), and Spain (Valencia), we ensure rapid delivery and local customer support.
Over 20 million patients cared for globally, supported by a workforce of 500+ professionals and an R&D team working in close collaboration with practicing orthopedic trauma surgeons.
Our manufacturing infrastructure in Kundli Industrial Area features advanced Japanese and German multi-axis CNC machines capable of achieving sub-micron machining tolerances. Surgical implants undergo rigorous electrochemical polishing, passivations according to ASTM standards, and bio-burden testing before cleanroom heat-sealing.
This uncompromised attention to material purity, grain refinement in titanium forging, and surface finish integrity ensures that every Auxein Radial Head Replacement System delivers exceptional fatigue resistance and biological inertia inside the human body.
Expert answers to common clinical, technical, and commercial procurement queries concerning Radial Head Replacement Systems.
Radial head replacement is indicated in acute, comminuted radial head fractures involving more than 3 articular fragments (Mason Type III fractures) where stable anatomical reconstruction via screws or plates is impossible or would compromise early elbow mobilization. It is also indicated in Mason Type IV fractures (radial head fracture with elbow dislocation) and Essex-Lopresti injuries (radial head fracture combined with interosseous membrane disruption and distal radioulnar joint dislocation) to restore axial and valgus elbow stability.
Cobalt-Chromium-Molybdenum alloy (CoCrMo per ISO 5832-12) is utilized for the articulating head component due to its high hardness, superior scratch resistance, and low friction coefficient when articulating against native cartilage or synthetic liners. Titanium alloy (Ti-6Al-4V ELI per ISO 5832-3) is selected for intramedullary stems because its modulus of elasticity is significantly closer to human bone than cobalt chrome, mitigating stress shielding while encouraging bio-compatible press-fit stability.
Modular systems allow independent matching of the intramedullary stem diameter and the head diameter/height. Because radial neck length and radial head dish diameter vary independently across patients, modularity enables the surgeon to recreate exact patient-specific anatomy. Furthermore, modularity facilitates insertion through minimal surgical exposures without putting excessive tension on lateral collateral ligaments.
Over-stuffing occurs when an excessively thick implant is selected, elevating humeroradial joint pressure. Auxein’s system features dedicated trial components and precise intra-operative reference guides that index against the proximal edge of the lesser sigmoid notch of the ulna. This ensures exact joint line restoration within sub-millimeter tolerances, avoiding stiffness and capitellar erosion.
Auxein Medical holds comprehensive international certifications including US FDA 510(k) clearance, CE Mark certification under EU-MDR 2017/745 guidelines, ISO 13485:2016 quality management system certification, MDSAP (Medical Device Single Audit Program) accreditation, and Indian FDA approval. Technical dossiers and certificate documentation are readily provided for hospital procurement and tender submissions.
Yes. Auxein offers both smooth press-fit stem options (allowing slight micromotion to self-align with the capitellum) and micro-textured cemented stems suitable for patients with osteoporotic bone or compromised canal morphology where rigid PMMA cement fixation is desired.
Auxein works flexibly with international distribution partners. Stock standard ordering configurations can be dispatched rapidly from our global logistics hubs in the USA, UAE, Mexico, or Spain. For custom OEM/ODM requests, minimum order quantities and manufacturing lead times are evaluated case-by-case based on tray customization and regulatory registration requirements.