Pubic Symphysis Anatomy, Pubic Symphysis Separation Plate Fixation Of Clinical Research And The Design Of The Double Flat Steel Plate

objective: Supplying basic theoretic basis for internal fixation of pubic symphysis separation steel plate by anatomic study on pubic symphysis neighbor structure and pubic symphysis skeleton. Methods: 20 normal adult specimens (15 males and 15 females) stored in Anatomy Teaching and Research Section of Medical Institute of Shandong University is selected. Distance between two funiculuses on upper edge of pubic symphysis, distance between womb round ligaments, distance between coronary artery and pubis, space between pubic tubercles, thickness of upper part of pubic symphysis, thickness of 1cm position outside pubic symphysis, thickness of 2cm position outside pubic symphysis, upper and lower distance of pubic symphysis and upper and lower distance of 1 cm position outside pubic symphysis are measured to supply reference for operation. Results: (1)Distance between two funiculuses on upper edge of pubic symphysis is 65.96±0.42mm, distance between two womb round ligaments on upper edge of pubic symphysis is 64.62 ±0.54mm, two of them have large movement ranges, so firstly finding funiculus or womb round ligament and extending them before operation can protect them. (2)Coronary artery is proboscis and ramus of inferior epigastric artery and obturator artery. It is behind superior ramus of pubis, some persons don't have it. Distance between coronary artery and pubic tubercle is 17.12±1.20mm. Superior ramus of pubis shall be fixed, this artery shall be protected when extending gash externally. (3)Pubic symphysis surface is formed by connecting fibrous cartilage, pubic symphysis surface is wide on upper part and is narrow on lower part or it has oval shape, upper part is 10.54 ± 0.32mm for man and is 11.45 ± 0.29mm for woman, distance between pubic tubercles is 59.68 ±0.89mm for man and is 62.67 ±0.53mm for woman. Conclusion: (1) Clearance between pubic tubercle on pubic symphysis and pubic symphysis can be added three screws. (2)Front part of pubic symphysis can be added two screws on each side at the most. ?Middle and upper bone on two sides of pubic symphysis part are thick and is suitable for adding screw.