Abstract
This study involved (n=14) patients.Inclusion criteria required the following:age of 30-70 years,symptomatic patient with disturbed ADL,single level L4/L5 or L5/S1 Grade I or grade II degenerative spondylolisthesis.Patients with osteoporosis,recent spondylodiscitis,subchondral sclerosis,visual and cognitive impairement, and all other types of spondylolisthesis were excluded. All the patients underwent short segment posterior fixation using CD2 or M8 instrumentation , laminectomy discectomy ,reduction and distraction of the involved vertebral space .In 57.1% (n=8) patients snugly fitted local bone chips were used while in 42..9%(n=6) patients Cage was used .Among Cage group, titanium cage was used in 4[28.5%] and PEEK cages in 2[14.2%] patient.In one patient unilateral PEEK cage was used. The mean follow-up period was 18 months.
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