Biomechanical experiment method of novel magnesium controlled-release dynamic intramedullary nail

By incorporating a biodegradable magnesium alloy spacer at the base of the intramedullary nail, the high nonunion rate of traditional intramedullary nails in complex fractures has been solved. This achieves simple, efficient, and controllable dynamic fixation, reduces medical costs and the risk of secondary surgery, and provides a scientific biomechanical basis.

CN122016465APending Publication Date: 2026-05-12ZHANGJIAGANG FIRST PEOPLES HOSPITAL
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Patent Information

Application Number
CN202610111276.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-27
Publication Date
2026-05-12

AI Technical Summary

Technical Problem

Traditional static fixation with intramedullary nails has a high rate of nonunion in complex fractures, while existing dynamic fixation techniques are complex, costly, and have uncertain effects, failing to meet clinical needs.

Method used

A magnesium-controlled release dynamic intramedullary nail was used. By placing a biodegradable magnesium alloy pad at the bottom of the intramedullary nail, the dynamic compression of the intramedullary nail was achieved by utilizing the controllable degradation characteristics of magnesium alloy. The biomechanical properties were verified by combining finite element analysis and physical and mechanical tests.

Benefits of technology

It significantly reduces the nonunion rate of femoral shaft fractures, reduces the risk of secondary surgery, lowers medical costs, improves treatment outcomes, and combines dynamic fixation with traditional intramedullary nailing, providing a scientific biomechanical basis.

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Abstract

The invention relates to a biomechanical experiment method of a novel magnesium controlled-release dynamic intramedullary nail, which comprises an intramedullary nail, a nail-withdrawing-preventing bolt, a material exchange hole and a gasket, the surface of the intramedullary nail is provided with an upper hole and a lower hole, the upper hole is the nail-withdrawing-preventing bolt, the lower hole is the material exchange hole, the gasket is embedded in the middle of the surface of the intramedullary nail, and the gasket is embedded in the middle of the surface of the intramedullary nail. A magnesium controlled release-dynamic compression coupling mechanism is provided for the first time, and a degradable material technology is combined with an orthopedic internal fixation dynamic idea; the magnesium alloy gasket structure is innovatively designed, automatic power compression of the intramedullary nail is achieved, and the intramedullary nail is powered without a secondary operation; innovative application of the magnesium alloy in large orthopedic implants is created, and the application field of degradable materials is expanded.
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