XXXX : the importance of tight hamstrings in the surgical correction.

@entity1 @entity8322 @entity530 @entity1515 @entity893
STUDY DESIGN: A historic cohort study of the sagittal alignment in 33 consecutive @entity1 with surgically corrected @entity8322 . OBJECTIVES: To determine if postsurgical imbalance, @entity893 , and @entity530 in @entity1 with @entity8322 is related to tight hamstrings. SUMMARY OF BACKGROUND DATA: Tight hamstrings are a frequent sign in @entity8322 . The importance of tight hamstrings in the surgical management of @entity8322 has not yet been studied. METHODS: Thirty-three @entity1 with @entity8322 were managed by surgical correction and fusion. Tight hamstrings, lumbar-pelvic range of motion, and sagittal balance were evaluated. Sixteen @entity1 had tight hamstrings, and 17 @entity1 had nontight hamstrings. Hamstrings were considered tight if the popliteal angle was >30 degrees. RESULTS: @entity1 with tight hamstrings have a significantly greater risk of postoperative imbalance (P = 0.05), and these @entity1 can only compensate for this risk by reducing their lumbar @entity1515 (P = 0.0227). Furthermore, the limitations in the lumbar and pelvic range of motion are predicted by tight hamstrings (P <or= 0.005). CONCLUSION: Tight hamstrings can be considered as an important factor in the surgical management of @entity8322 . Tight hamstring @entity1 can be classified as "lumbar compensators" and as such are prone to overcorrection and imbalance. Preoperative assessment of the lumbar-pelvic range of motion and tight hamstrings should therefore be advised. Extensive fusion of the lumbar segments might compromise the lumbar compensation mechanism and induces further risk of imbalance.
