SPRING ELASTIC DEVICE THAT LINKS FIXED COMPONENTS ON MORE THAN TWO LEVELS OF BONE

摘要

A spring elastic device for connecting fastening members of more than two bones of vertebral column includes at least one resilient connecting member; and at least one threaded connecting rod. Each resilient connecting member includes an externally threaded cylinder having an axial hole with an internally threaded portion formed at an open end of the axial hole. Each threaded connecting rod includes a first externally threaded portion at a first end.