CT measurement of posteromedial part of the distal tibia and its clinical significance

Objective Toofferanatomicbasisfordesigninganatomicalplateofposteromedialpartofthe distal tibia. Methods 40 cases of healthy adults were scanned by spiral CT,and then three-dimensional reconstruction of tibia was performed. Anatomy characteristics of posteromedial distal tibia,including the postero-version angle of distal tibia,the twist height in the sagittal plane and the height of security zone for the screw in the distal tibia cross-section,were measured. Results The postero-version angle increased gradually,whereas,the twist height decreased,from the lateral to medial. Correlation analysis showed that the postero-version angle had no correlation with the length of tibia,gender and age,however,the height of security zone and the twist height appeared positive correlation with the length of tibia,despite of gender and age. Conclusions The anatomical characteristics of posteromedial distal tibia are valuable for guiding the development of posteromedial anatomical plate of distal tibial and its clinical application.