The best replacement for roux en y is lap band.

The best alternatives to roux en y are rated as following:
★★★★★  lap band
★★★★★  sleeve
★★★  duodenal switch
★★  gastric sleeve
★  billroth ii
★  billroth
  billroth 2
  mini gastric bypass

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Speaking about roux en y, one probably shouldn't forget about gastrectomy.

Other search terms related to roux en y and their ratings are:
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roux en y
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