| With industrial development and the increase of motor vehicles, the increasingincidence of high-energy pelvic fracture. Minimally invasive pelvic fractures guidetreatment of biomechanics, the treatment of pelvic fracture is more and more widely.However, the traditional pelvic fracture surgery, incision, practices, skeletal traction,skid dial, top rod treatment, anatomic reduction of the fracture fragments or similaranatomical reset only after the installation, fixed within the traditional fixed titaniumplate; minimally invasive treatment of surgical treatment of prevalent, how to apply the"small incision (minimally invasive) methods, in particular the various tissues of thehuman pelvis is the human body up to the thickest part of the body contralateral goals,how to achieve accurate targeting point and take firm the fixed reset fracture fragmentsorthopedic surgeon is still plagued, has also become larger problems hinder theapplication of minimally invasive techniques in the pelvic fracture.Pelvic fracture is mainly caused by high-energy injury and is usually followedwith multiple injuries. The traditional ORIF treatment will aggravate the injury,therefore, Roberts[1]claimed that in the early period of injury, ORIF treatment is notproper, minimally invasive percutaneous technique should be adopted. In recent years,drawing support from the development of imaging and navigation technology, MIPSFtechnique becomes one of the common used treatment methods by its advantages ofslight injury, less operation time, less complication and so on.MIPSF is a kind of stable and reliable technology that has slight injury.Scholars[2]who applied this technology to sacroiliac joint injury, separation ofsymphysis pubis and ilium fractures were achieved nicer operation effect. In thetraditional treatment of displacement or slightly displacement acetabula anterior column, MIPSF technique is generally divided into antegrade technique and retrogradetechnique. A vast majority of domestic and foreign scholars have studied the entrypoint and puncture angle of antegrade technique and retrograde technique[3-9].The traditional MIPSF technique always determines the position of entry pointfirst, then the direction. The puncture angle has strong subjectivity becausethere is nosupporting point in the acetabular and no correct directionwhen the guiding needle isdrilled into during the operation. It could be conducted only by visual observation andhand feeling; therefore, it is easy for the guiding needle to deviate from the correctposition. During the course, the X-ray fluoroscopy over and over again in order toobtain satisfying surgical effect. Also, when it needs to adjust the direction of theneedle, it always depends on the operator’s subjective feeling, which obviouslyprolongs the time of operation and increase the X-ray exposure time of the doctor andpatient. Carmack[10]shows that although X-ray fluoroscopy is repetitiously used, thescrew steel deviates from the correct position.Whereas, from the view of anatomy, there still exists a stable osseous path.Depend on the principle of―Two Points Form a Line‖the position and direction couldbe determined by the screw’s entry point and coming out point. To self-develop MIPSFguide apparatus which could be used to ensure the guiding needle or screw getsthrough the entry point and coming out point and be expected to lay the guiding needleor screw in the anterior column cortex, in order to reduce the complication of screwpuncturing out, make the operation simplified and reduce the radiation during theoperation.Will minimally invasive percutaneous tensile screw guide application on pelvicspecimens and body respectively and has achieved preliminary results, preliminaryevidence that the tensile strength of minimally invasive percutaneous screw guidevalidity and possibility. |
