Abstract
[Purpose] PLIF is a good operative method for decompression and interbody fusion for lumbar spine diseases with instability. The factors of obstruction to bone union after PLIF, were studied and are reported below.
[Subjects and Method] 58 cases who underwent surgery of PLIF one year ago during February 2005 and April 2007 were studied. For these cases, factors of obstruction to bone union were studied. The factors were age, sex, disc level of fusion, time required for oparation, amount of bleeding, amount of removed disk, perioperative Hb change, height, weight, and BMI. For analysis method, a univariate analysis was performed for an individual explanation variables. A logistic multivariate analysis of whether or not there were obstructions to bone union was also performed as objective explanation variable.
[Results] 89% of the 52 cases achieved bone union after the first postoperative year. From the univariate analysis/logistic multivariate analysis between each group, there was a statistically significant difference in obstruction to bone union and bone union was poor at the position of L5/S fusion. There was no significant difference in other studied items.
