Effect of preservation of the XXXX spinous process and its paraspinal muscular attachment on the prevention of @entity282 in C3-6 laminoplasty.

@entity1 @entity6747 @entity602 @entity4048 @entity36381 @entity2048 @entity21495 @entity282 @entity3057
UNASSIGNED: OBJECT @entity4048 after C3-6 laminoplasty has been reported to be significantly lesser than that after C3-7 laminoplasty because of the preservation of the @entity36381 spinous process and the attachment of nuchal muscles such as the trapezius and @entity2048 , which are connected to the scapula. The @entity6747 spinous process is the second longest spinous process after that of @entity36381 , and it serves as an attachment point for these muscles. The effect of preserving the @entity6747 spinous process and its muscular attachment, in addition to preservation of the @entity36381 spinous process, on the prevention of @entity4048 is not well understood. The purpose of the current study was to clarify whether preservation of the paraspinal muscles of the @entity6747 spinous process reduces @entity282 compared to that after using nonpreservation techniques. METHODS The authors studied 60 @entity1 who underwent C3-6 double-door laminoplasty for the treatment of cervical spondylotic @entity602 or cervical @entity3057 ; the minimum follow-up period was 1 year. Twenty-five @entity1 underwent a @entity6747 paraspinal muscle preservation technique, and 35 underwent a @entity6747 nonpreservation technique. A visual analog scale (VAS) and VAS grading (Grades I-IV) were used to assess @entity4048 1-3 months after surgery and at the final follow-up examination. @entity4048 was classified as being 1 of 5 types, and its location was divided into 5 areas. The potential correlation between the @entity21495 spinous process length ratio and @entity4048 was examined. RESULTS The mean VAS scores (   SD) for @entity4048 were comparable between the C6-preservation group and the C6-nonpreservation group in both the early and late postoperative stages (4.1    3.1 vs 4.0    3.2 and 3.8    2.9 vs 3.6    3.0, respectively). The distribution of VAS grades was comparable in the 2 groups in both postoperative stages. Stiffness was the most prevalent complaint in both groups (64.0% and 54.5%, respectively), and the suprascapular region was the most common site in both groups (60.0% and 57.1%, respectively). The types and locations of @entity4048 were also similar between the groups. The @entity21495 spinous process length ratios were similar in the groups, and they did not correlate with @entity4048 . The reductions of range of motion and changes in sagittal alignment after surgery were also similar. CONCLUSIONS The @entity6747 paraspinal muscle preservation technique was not superior to the C6-nonpreservation technique for preventing @entity282 .
