OBjEcT Failed solid bony fusion, or pseudarthrosis, is a well-known complication of lumbar arthrodesis. Recent ad-. vances in radiographic technology, biologics, instrumentation, surgical technique, and understanding of the local biology. have all aided in the prevention and treatment of pseudarthrosis.
Definition of duff. 1  1 : a boiled or steamed pudding often containing dried fruit. 2  2 : the partly decayed organic matter on the forest floor. 3  3 : fine coal : slack.
Definition of duff. duff. You're the duff. There is always a duff in every click. A duff is the designated ugly fat friend of every group. Many people go to them to get information about their hot friend or friends because they are more approachable. Last edited on Jul 12 2015. Submitted by Anonymous on Jul 12 2015.