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The INBONE™ Fusion System
1. Design Rationale 2. Fusion System Implants 3. Fusion Cases 4. Downloadable PDF's
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1. Design Rationale
Arthrodesis of the foot and ankle has been used for over a century to ease the pain of arthritis, joint instability, and deformity that prevents a plantigrade foot. Although fusion procedures have been successful in relieving pain and stabilizing the foot, there still exist relatively high rates of non-unions in many arthrodeses. Some as high as 17% in triple arthrodesis1, 30% in isolated calcaneal cubiod fusions2, 7% in midfoot fusions3, and 10% in Metatarsalphalangeal Joint fusions4.
With these types of stats, Dr Reiley was frustrated with not only the non-unions but the lengths of time required for fusions to occur as well as the high incidence of post operative infections. His idea was to create fusion from within that would reduce non- unions, decrease fusion times and decrease post-op infections.
1Bednarz PA, Monroe MT, Manoli II A: Triple arthrodesis in adults using rigid internal fixation: An assessment of outcome. Foot and Ankle Int 20:356-363, 1999.
2 Toolan DM, Sangeorzan BJ, Hansen Jr ST: Complex reconstruction for the treatment of dorsolateral peritalar subluxation of the foot: Early results after distraction arthrodesis of the calcaneo-cuboid joint in conjunction with stabilization of, and transfer of the flexor digitorum longus tendon to the midfoot to treat acquired pes planovalgus in adults. JBJS 81A: 1545-1560, 1999.
3 Mann RA, Prieskorn D, Sobel M: Mid-tarsal and tarso-metatarsal arthrodesis for primary degenerative osteoarthritis or osteoarthritis after trauma. JBJS 78A:1376-1385, 1996
4 Coughlin MJ: Arthrodesis of the first metatarsophalangeal joint with mini-fragment plate fixation. Orthopedics 13:1037-1044, 1990
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2. The Fusion System Implants
The INBONE™ System implants are implanted intra-medullary with a minimally invasive incision keeping soft tissue stripping to a minimum. This approach eliminates the risk of tendon irritation and reduces the chance of post- op infection.
Approaching fusion from the inside of the bone yields three dimensional fixation providing maximum stability. Additionally, the implants have been designed with unique antirotational shapes to eliminate micro-motion.
Bony In – Growth Technology that has been used for years in larger joints has now been incorporated into the small bones of the foot. The INBONE™ Fusion system is comprised of plates and rods that are coated with a porous plasma spray coating which acts as a conductive lattice for bone growth across the surface of the implant and therefore across the joint.
Early studies have shown accelerated fusion. The porous plasma spray coating combined with the larger surface area leads to accelerated fusion times. In the first 47 cases, fusion rates were documented from 4-10 weeks. Fusion Case Study Paper (PDF)
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3. The INBONE™ Fusion System has been used in the following fusion cases:
- Metatarsalphalangeal Joint
- Talo-navicular-cunieform
- Metatarsal-cunieform
- Calcaneal-Cuboid
- Talo-navicular
- Four Corner
- Sub-Talar
- Ankle
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Downloadable PDF's
- Fusion Case Study Paper
- INBONE Fusion System Surgical Procedure
- Post Operative Care Fusion System
- Product Specifications for Fusion System