The spinal average intensity and stiffness after SSRF internal fixation in the treatment of lumbar spondylolisthesis was higher than those of normol specimens and those after Steffee steel plate,MSF and SF internal fixation.

• 采用SSRF内固定其平均强度和刚度均比正常标本高 ,其平均强度、刚度和极限强度均比Steffee钢板、MSF内固定器、SF内固定器高。