[Retrospective study of combined application of interspinous process fixation system and rigid fixation system for degenerative lumbar diseases].
OBJECTIVE
To assess the efficacy and safety of combined application of interspinous process fixation system and rigid fixation system for degenerative lumbar diseases.


METHODS
From September 2007 to September 2008, 16 cases with degenerative lumbar diseases were treated with combined application of interspinous process fixation system and rigid fixation system. The clinical results were assessed by VAS of pain of lumbar and lower limbs, lumbar JOA score and Prolo functional score. The radiological results including implant position (interspinous process, pedicle screws and plates), spinous process fracture, segmental range of motion (the non-fusion fixation segment, and the intermediate segments between fused and non-fused segments) which were assessed by lumbar static and dynamic X rays.


RESULTS
All 16 cases obtained an average follow-up of 17.6 months. At final follow up, lumbar VAS, lower limbers VAS, lumbar JOA score and Prolo functional score were significant improved than those of pre-operation (lumbar VAS: 1.9 +/- 1.4 vs. 4.5 +/- 3.1; lower limbs VAS: 1.7 +/- 1.2 vs. 6.3 +/- 2.9; lumbar JOA score: 22.8 +/- 3.3 vs. 12.5 +/- 4.7; Prolo functional score: 8.3 +/- 1.2 vs. 4.0 +/- 2.3). Range of motion of the non-fusion fixation segment was (9.8 +/- 4.2) degrees and that of the intermediate segments between fused and non-fused segments was (13.2 +/- 3.5) degrees .


CONCLUSIONS
Combined application of interspinous process fixation system and rigid fixation system for degenerative lumbar diseases provides a new idea to avoid the multi-segment fusion fixation and pertinent potential problems. Short-term clinical results are successful.
Sun
Hao-lin
HL
Department of Orthopedics Surgery, Peking University First Hospital, Beijing 100034, China.
Li
Chun-de
CD
Liu
Xian-yi
XY
Li
Hong
H
Yu
Zheng-rong
ZR
Lin
Jing-rong
JR
Yi
Xiao-dong
XD
Liu
Hong
H
Lu
Hai-lin
HL
D000328:Adult; D000368:Aged; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D016268:Internal Fixators; D008159:Lumbar Vertebrae / Q000601:surgery; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D013122:Spinal Diseases / Q000601:surgery*; D013123:Spinal Fusion / Q000379:methods*; D016896:Treatment Outcome