A surgical assembly includes a tensioner having a first end and a second end. A tension member extends from the first end of the tensioner. A mounting member is connected to the second end of the tensioner. An arm extends from the first end of the tensioner and includes a series of relatively moveable links that define an axial bore configured for disposal of the tension member. Each link defines a first mating surface and a second mating surface disposed in a configuration such that tensioning of the tension member interlocks the first mating surface with the second mating surface of an adjacent link in the series to selectively fix the links in a selected orientation.
