The Mid-term Follow-up Of K-rod Non-fusion Internal Fixation In The Treatment Of Degenerative Lumbar Disease

Objective: To summarize the mid-term effectiveness of K-rodnon-fusion internal fixation treatment of degenerative lumbardisease．Methods: From February2009to October2010．A retrospectiveanalysis was carried out on50patients(32males and18females)diagnosed as degenerative lumbar disease and treatedwith K-rod non-fusion internal fixation dynamic device, who hadbeen followed up for1year at least，the average age was38years(range，19-58years)．The results were assessed by JapaneseOrthopedic Association(JOA)scores， visual analoguescale(VAS)scores，Oswestry disability index(ODl),and the rang ofmobility of the responsible segments were measured on X—filmbefore the operation and at last follow-up.Results: The50patients Were followed up for26．4months(range，12—36months)．At the last follow—up，JOA，ODIand VAS scores of patients with dynamic device instrumentationwere improved by73.34％±8.7％、37.18％±15.17％、77.35％±11.17 ％；JOA，ODI and VAS scores of patients treated with dynamic andfusion device instrumentation were improved by76.37％±9.82％、30.5％±5.15％、71.68％±9.79％； There were no significantdifference in the rang of mobility of the responsible segments(P>O．05).There was significant difference in the rang of mobility ofthe whole lumbar spine。Conclusion: The mid—term effectiveness illustrate that theK-rod non—fusion fixation is a reliable for degenerative lumbardisease, as it remained disc height and the rang of mobility of theresponsible segments and improved the life quality of the patients.