EXTERNAL SKELETAL FIXATOR 1 EXTERNAL SKELETAL FIXATORS n

EXTERNAL SKELETAL FIXATOR 1

EXTERNAL SKELETAL FIXATORS n External skeletal fixator are a versatile affordable treatment for long bone fracture management. n Joint arthrodesis n A temporarily joint immobilization n But it not use for pelvic fracture , and articular fracture. 2

CHARACTER OF EXTERNAL FIXATOR n Increase the pin diameter increase the holding capacity, but it should not exceed the 20% of the bone diameter. n Stability of the fracture area is directly proportional to the number of pin. n Bone and fixator clamp distance inversely proportional to the stiffness of fixator. 3

n Strength and stiffness increase as the size and number of external connecting bar increase 4

NOMENCLATURE EXTERNAL OF COMMON FRAME n TYPE ONE A ; common frame are unilateral uniplanar. n TYPE ONE B : unilateral bi planar n TYPE TWO : bilateral uniplanar n TYPE THREE : bilateral - biplanar n CIRCULAR EXTERNAL FIXATOR 5

TYPE ONE A Unilateral uniplanar n Applied to the medial surface of radius and tibia. or the lateral surface of femur and humerus. n 6

TYPE ONE - B Unilateral - biplanar n Applied on radius and tibia. n 7

TYPE TWO Bilateral uniplanar n Cannot be applied to the femur and humerus. n Applied only on the radius and tibia. n 8

TYPE THREE Bilateral biplanar n Cannot be applied over femur and humerus because the position of the body wall n 9

CIRCULAR EXTERNAL FIXATOR It use for fracture treatment n Angular limb deformity correction n 10

EQUPEMENT AND SUPPLIES n Fixation pin inserted in to bone to hold major fragment. n External connecter to support fracture. n Linkage device 11

FIXATION PIN n ACCORDING TO PENETRATION HALF PIN : inserted so that they penetrate both cortices but only one skin n FULL PIN : inserted both cortices and skin n 12

ACCORDING TO THREADING n Nonthreaded fixation pin - it has smooth surface. n Threated pin n End threated and centrally threated 13

External connector are come in small , medium and large external connector bar. n Made of stainless steel , titanium alloy , carbon fiber , aluminum or acrylic n 14

LINKAGE DEVICES The linkage device connects the fixation pin and external bar. n It consist if a single clamp through which external bar fixation pin placed. n 15

TYPES OF CLAMP n. U clamp n S k clamp n The u clamp are more secure in resisting fixator pin movement than sk clamp ( kraus et al ) 16

APPLICATION n Fracture treatment n Arthrodesis n Bone lengthening n Bone transport n Angular limb deformity correction 17