BACKGROUND: Rocker is a novel @entity1344 ( @entity1344 ) that can be installed via unilateral approach by virtue of its unique design. This controlled study compared the clinical outcome of Rocker versus X-Stop to access the feasibility and validity of the novel @entity1344 . METHODS: From March 2011 to September 2012, 32 @entity1 treated with Rocker and 30 @entity1 treated with X-Stop were enrolled in this study. The primary clinical outcome measure was Oswestry Disability Index (ODI) score. The secondary clinical outcome measure was Japanese orthopaedics association (JOA) score. Disc height index (DHI) and foraminal height index (FHI) were measured for postoperative radiographic evaluation. Implant failures were also recorded. RESULTS: There were 55 @entity1 with complete data during 24  months follow-up. Among the 55 @entity1 , 38 @entity1 underwent @entity1344 in combination with microdecompression. At the final follow-up, 49 @entity1 achieved a minimal clinical important difference (>= 8 points ODI improvement). The mean operative time was 53.6  min (range, 30 to 90  min) in Rocker group and 63.1  min (range, 30 to 100  min) in X-Stop group. The average @entity190 was 111  ml (range, 50 to 400  ml) in Rocker group and 138  ml (range, 50 to 350  ml) in X-Stop group. ODI score were significantly improved from preoperative 46.8        9.2 to 12.2        2.6 at 24  months follow-up in the Rocker group and from preoperative 45.8        9.8 to 11.8        2.4 at 24  months follow-up in the X-Stop group. JOA score also improved significantly in both groups. The radiographic parameters of DHI and FHI in both groups increased immediately postoperatively, however, the improvements seemed to revert toward initial value during follow-up. Two @entity1 in Rocker group demonstrated implant dislocation within one week postoperatively and one @entity1 in X-Stop group demonstrated implant migration at two months postoperatively. CONCLUSIONS: Preliminary clinical and radiographic outcome was similar between Rocker and X-Stop group. For @entity1 of @entity2649 with unilateral nerve root involved or mild-to-moderate central canal stenosis, Rocker offers a new alternative with less damage.

Interspinous process stabilization with Rocker via unilateral approach versus X-Stop via bilateral approach for XXXX : a comparative study.

@entity1 :: ('9606', 'Species') :: ['patients', 'patient'] @entity190 :: ('MESH:D006473', 'Disease') :: ['blood loss'] @entity2649 :: ('MESH:C563613', 'Disease') :: ['lumbar spinal stenosis'] @entity1344 :: ('MESH:D043171', 'Disease') :: ['IPS', 'interspinous process stabilization']
@entity2649 :: (MESH:C563613,Disease) :: ['lumbar spinal stenosis']
