Abstract:

BACKGROUND: The research has shown that the less invasive stable system (LISS) fixation has good effect on the treatment of distal femoral fractures, but its parameter was according to westerner, and the specification of a manufactured item is limited. 
OBJECTIVE: To digital measure the related anatomical CT data of LISS fixation in Chinese adults. 
METHODS: Fifteen cases imaging samples with no disease or osteoporosis were selected from the Second Affiliated Hospital of Inner Mongolia Medical College. The MIMICS10.01 software was used to do the three-dimensional reconstruction, the width of distal femur, anteroposterior diameter of condylus lateralis femoris, basilar part width of condylus lateralis femoris and angle between condylus lateralis femoris and trunk were measured in the three-dimensional images. Every 5 cm was divided into a segment from the 5 cm to the lower edge of the greater trochanter to the lateral epicondyle, five segments in total. The width of internal and lateral cortex and medullary cavity diameter of the femur in the central part of each segments were measured.  
RESULTS AND CONCLUSION: After LISS fixation in Chinese adults, the width and anteroposterior diameter of condylus lateralis femoris were (84.80±1.27) mm and (67.36±1.41) mm in the left and (84.60±1.40) mm and (66.27±1.42) mm in the right; the basilar part width of condylus lateralis femoris was (42.53±3.42) mm and (42.98±1.25) mm; the angle between condylus lateralis femoris and trunk was (7.58±0.69)° in the left and (7.66±0.79)° in the right, and there was no significant difference between two sides.