Analysis on effect of different bone graft fusion operations for lumbar spondylolisthesis

Objective:To compare the effects of different bone graft fusion for lumbar spondylolisthesis. Methods:From Jan. 2006 to Dec. 2008,85 patients(male 36 and female 49,the ranging in age from 38 to 65 with an average of 51.8 years) with lumbar spondylolisthesis were treated with different methods. Operative method included posterolateral lumbar fusion (PLF,group A,32 cases),posterior lumbar interbody fusion(PLIF,group B,28 cases) and anterior lumbar interbody fusion(ALIF,group C,25 cases). The effect and bone graft fusion were respectively evaluated with Nakai score and Suk standard. Results:All the patients were followed up no less than 2 years. In group A,19 cases got excellent result,good 9,fair 4;in group B,16 cases got excellent result,good 9,fair 3;in group C,14 cases got excellent result,good 8,fair 3. The rates of the excellent and good in group A,B,C were respectively 87.5%(28/32),89.3%(25/28),88.0%(22/25);and the rates of the bone fusion in group A,B,C were respectively 68.8%(22/32),92.9%(26/28),92.0%(23/25). Group B,C were better than of group A in maintainence of intervertebral space height,and in the rate of bone fusion(P0.05). Conclusion:Anterior and posterior lumber interbody fusion has a better effect than posterolateral lumbar fusion in the maintainence of intervertebral space height and bone fusion,but the situations of lumbar spondylolisthesis is complex and diversifiable,the fusion method should be selected according to the type,degree of lumbar spondylolisthesis,lumber degeneration,nerve compression,etc.