These surgeries are : Typically for revision(repeat) surgery or for more complex deformity surgery or in cases where there may be also a concern for the fusion healing. In means a surgical approach to front of spine as well as another from the posterior or back into the spine to allow more correction of any curvature, placement of more bone graft material for better fusion healing rates usually using more implants.
Answered 12/26/2013
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Fusion: An anterior spine fusion means removing the disc from the front followed by placing a cage or bone graft in place of the disc to fuse the bones together in the front. This is often combined with a posterior spinal fusion which involves placing screws and bone graft in the back in order to get the best possible chance of successful fusion.
Answered 12/3/2014
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