The Metatarsophalangeal Joint (MPJ): In-Home Therapy Products

The ERMI MPJ Extensionater relies on the ERMI Patient-Actuated Serial Stretch or PASS protocol, coupling periods of stretch with periods of relaxation for optimal therapy.

ERMI MPJ Extensionater
The ERMI MPJ Extensionater helps patients with hallux limitus or hallux rigidus - severely limited motion in the metatarsophalangeal joint (MPJ) at the base of the big toe. The device can be configured to promote both extension and flexion by mimicking the position of the foot and toe while walking. Controlled by the patient, our patented air bladder technology provides just the right amount of stretch to help the MPJ begin to glide normally.

Rather than treating the MPJ like a hinge joint as some other therapies do, the ERMI MPJ Extensionater respects the dynamic “J” axis of the joint. With the ERMI device, results last.