The Journal of Bone and Joint Surgery, Vol 69, Issue 4 596-604, Copyright © 1987 by Journal of Bone and Joint Surgery, Inc
The antiglide plate for distal fibular fixation. A biomechanical comparison with fixation with a lateral plate
JJ Schaffer and A Manoli
Posterior antiglide plates recently have been introduced as a method of
fixation for the short oblique fracture (Type B, as defined by the AO
Group) of the distal part of the fibula. This method has several advantages
over the more commonly used lateral plate for the fixation of this type of
fracture, including dissection of a smaller area and less operative time,
minimum bending of the plate, and no potential for penetration of a screw
into the joint. The system can also be applied without insertion of a screw
into the distal fragment. This prompted us to compare the biomechanical
properties of fixation with the antiglide and lateral plating systems.
Short oblique fractures of the distal part of the fibula were produced
mechanically in cadaveric legs by supination and external rotation of the
foot. The torque that was necessary to produce the fracture in each of
twenty-four fibulae was recorded. After fracture, each fibula was reduced
anatomically and fixed internally with a lateral plate or antiglide plate
applied posteriorly. The strength of fixation was measured by restressing
the legs until failure of fixation occurred. The stiffness of the fixation
system and the amount of energy required to produce failure of fixation
were also calculated. The system using the lateral plate for fixation
failed when the torque reached an average of 64.3 per cent of the torque
that produced the fracture.(ABSTRACT TRUNCATED AT 250 WORDS)