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.
The definition of a niche is a specialized part of a market for products or services or a little separated area in a room. An example of a niche is a market for beagle products, which is a niche in the market of dog products as a whole. An example of a niche is a little windowseat in a house tucked into a corner. niche