K nail work on the pricliple of -
One point fixation
Two point fixation
Three point fixation
Four point fixation
Ans. is 'c' i.e., Three point fixation * K-nail is used for transverse or short oblique fracture of femur, especially in isthemic area.* K-nail (Kuntscher cloverleaf intramedullary nail) provides three points fixation due to elastic deformation.* These three points of fixation are both ends of bone (2 points) and isthmus (3rd point).
Management In Orthopedics