Proximal ulna morphometry: which are the "true" anatomical preshaped olecranon plates?

Purpose to define the optimum design of the anatomical preshaped olecranon plate. Methods the geometry of the proximal ulna was studied in 200 paired caucasian ulnae, using a digital caliper and goniometer. gender and side differences were analyzed. Results were compared with the corresponding geometri- cal parameters of three olecranon plates with different con- tour. All three plates were placed on the dorsal surface of a "model" ulna, i.e., a right dried ulna having osteometric parameters similar to the averages of our sample, and plate-