Surgical data
All surgeries were performed by the 2 authors. Most of the patients
were operated on L3L4 and L4L5 (80%), and in 65% of the patients
the stand-alone cage was placed on the left side. The mean duration of
surgery was 56 minutes (range 35-80 minutes). Surgical complications
occurred in 5 patients, namely cerebrospinal fluid leakage (4 patients)
and nerve root injury (1 patient) with sensory deficit. Three of these
5 patients had previous surgery at the index level. The mean hospital
admission was 2 days (range 1-5 days) (Table 2).