Patients will be randomized into 2 groups: * Group 60: Patients will undergo a Roux-en-Y gastric bypass with a Biliopancreatic limb length of 60cm * Group 100: Patients will undergo a Roux-en-Y gastric bypass with a Biliopancreatic limb length of 100cm Bone mineral density will be evaluated before surgery and 2 years after it.
Patients will be randomized into 2 groups: * Group 60: Patients will undergo a Roux-en-Y gastric bypass with a Biliopancreatic limb length of 60cm * Group 100: Patients will undergo a Roux-en-Y gastric bypass with a Biliopancreatic limb length of 100cm Alimentary limb will be constant in both groups (150cm length) Bone mineral density will be evaluated before surgery and 2 years after it, by means of X ray absorptiometry (DEXA). Changes in bone mineral density in lumbar column will be assessed.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
DIAGNOSTIC
Masking
SINGLE
Enrollment
200
Roux-en- Y gastric bypass will be performed with a biliopancreatic limb length of 60cm.
Roux-en- Y gastric bypass will be performed with a biliopancreatic limb length of 100cm.
Bone mineral density
Bone mineral density will be evealuated by absorptiometry at the level of lumbar column
Time frame: 2 years after surgery
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