title: Kinematic analysis of spinal fusions.
abstract: Two cases with clinical suspicion of incompletely healed anterior fusion between L5 and S1 were examined by means of a roentgen stereophotogrammetric method. In both cases a pseudarthrosis was found. The method makes it possible to disclose rotations and translations between veretebrae with an accuracy of about 0.2degree and 30-120 mum, respectively.
mesh_terms: D001696:Biomechanical Phenomena; D005260:Female; D006801:Humans; D010780:Photogrammetry; D011542:Pseudarthrosis / Q000000981:diagnostic imaging; D011859:Radiography; D013123:Spinal Fusion; D013131:Spine / Q000000981:diagnostic imaging*