Knee splint A22®

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Overview
DonJoy A22 is a custom-made titanium functional knee brace for moderate to severe ligament instability (ACL, MCL, LCL). It combines a low-profile frame with a clinically proven 4-point lever system and a FourcePoint hinge to provide controlled range of motion and protection during rehabilitation.

Indications

• Moderate to severe ACL, MCL and LCL instability
• Post-operative protection and ligament rehabilitation

Key features

• Custom-made to patient measurements
• Titanium frame: ultra-light and corrosion-resistant
• Patented 4-point lever system for improved control of tibial translation
• FourcePoint hinge — provides resistance in the final 25° of extension
• Low-profile design with integrated straps and guards to reduce overall profile
• Antimicrobial inner lining to neutralise odours
• Padded, shock-absorbing cells for comfort and stability
• Replacement lining supplied with the brace

Materials & construction

• Frame material: titanium
• Hinge: FourcePoint articulation
• Soft components: antimicrobial and padded materials with silicone shock pads
• Manufacturing: bespoke production based on patient measurements

Sizing & fitting

• Measurements taken with CCMI Mark III measurement device
• Available in standard thigh/calf heights; short length option available
• Delivered with spare lining; brace provided in ACL version

Clinical considerations
Intended for active patients who do not participate in high‑impact contact sports. Prescribe and fit under clinician supervision. ROM limitation options include flexion stops at 45°, 60°, 75° and 90°; extension stop available on request.

Technical specifications

• Flexion stops: 45°, 60°, 75°, 90°
• Extension stop: on request
• Measurement tool: CCMI Mark III
• Articulation: FourcePoint hinge