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Description
The Metal Hemi Toe (Model MHT) is a single stemmed resurfacing prosthesis for the first proximal phalanx designed to supplement first metatarsal phalangeal joint arthroplasty. The implant is manufactured from cobalt chrome to provide a wear resistant articular surface. A section of the intramedullary stem and the surface contacting the resected base of the proximal phalanx are coated with a titanium plasma spray to encourage osseous integration. The implant is manufactured in three sizes and is supported with a simple, custom designed instrumentation set.
Features and Benefits
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Trapezoidal articular surface matches the geometry of the resected base of the proximal phalanx and is anatomically congruent to the metatarsal head. |
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The thin plantar aspect of the articular surface allows for preservation of the flexor hallucis brevis attachment site with up to 3mm of joint decompression. |
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A short, trapezoidal stem provides a better anatomic fit in the intramedullary canal, with an angulation to help protect the plantar cortex. |
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The dorsal aspect of the implant is rounded to reduce impingement on the metatarsal head. |
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The stem is designed to facilitate revision to a Primus UltraSil implant. |
Supporting Documentation
A Day Kit for the Futura PrimusTM Flexible Great Toe is available.
Indications
1. Hallux limitus or hallux rigidus. 2. Painful rheumatoid arthritis. 3. Hallux abductovalgus associated with arthritis. 4. Unstable or painful joint from previous surgery. 5. Geriatric bunion.
Contraindications
1. Severe bone demineralization. 2. Inadequate neurovascular status. 3. Inadequate skin or musculotendinous system. 4. Inadequate bone stock. 5. Psychologically unsuitable patient.
6. Active sepsis.
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