| 主权项 |
1. A spinal fusion system for positioning between a first and second vertebral body, the system comprising:
a rigid titanium body having a longitudinal axis and a first modulus of elasticity, and a posterior face, the rigid body defining at least one fastener bore therethrough, each bore configured for receipt of at least one fastener, wherein each fastener comprises a bone screw having a head and a threaded shank and is configured for insertion into a vertebral body; a rigid titanium plate integral to a portion of the posterior face of the rigid body, extending away from and transverse to the posterior face of the rigid body, the rigid plate defines a plurality of cavities therethrough; and a first thermoplastic implant body and a second thermoplastic implant body wherein the first implant body and the second implant body each have a first inner and a second outer surface and wherein the first implant body and the second implant body connect at their respective first surfaces, the first surfaces having a plurality of projections, and within each of the cavities are matingly connected at their first respective surfaces by the plurality of projections of the first implant body interlocking with the plurality of projections of the second implant body, each body having a modulus of elasticity less than or equal to the first modulus of elasticity, wherein the first and second implant bodies are configured to matingly connect to one another with the rigid plate positioned therebetween, and wherein the combination of the first and second implant bodies and the rigid plate is configured for insertion between the first and second vertebral bodies, and further comprising a flexible retainer pin for retaining one of the at least one bone screw in a respective fastener bore, the flexible retainer pin positioned through a retaining bore in a portion of the head of the bone screw, wherein a portion of the flexible retainer pin juts out from at least one end of a wall defined by the retaining bore, and wherein the flexible retaining pin is configured to bias toward the head of the bone screw during insertion of the bone screw into the fastener bore, making its effective length less than the diameter of the fastener bore, and bias back to an original position after insertion, thereby retaining the bone screw within the fastener bore. |
