[An experimental study of treatment of comminuted distal femur fracture with locked double- plating].
OBJECTIVE
To explore new techniques for the treatment of comminuted distal femoral fractures to promote functional restoration and reduce the complications of the fracture.


METHODS
Sixteen adult canines were selected for this study, and the experimental and control hindlimb for each canine were randomly determined. Distal comminuted fracture (AO/ASIF Type C2) was induced in both sides of the canine's femurs, and one side was fixed with the double plates (steel plate and polyethylene plate), whereas the other with a single steel plate. By the end of 3, 6, 9 and 12 weeks respectively after surgery, 4 of the dogs were used for weight-bearing observation and radiological and histological examination of the limbs.


RESULTS
In comparison with dogs in single plate group, double plate fixation resulted in earlier recovery of weight bearing, more abundant and better callus, finer callus moulding and quicker healing. There were slightly more inflammatory cells, however, in the tissues under the polyethylene than those under the steel plate.


CONCLUSIONS
Locked double-plate internal fixation is an excellent alternative for treating comminuted fractures of the distal femur, and may have its potential use in clinical settings.
Ren
Gao-Hong
GH
Center of Orthopedic Traumatology of PLA, Nanfang Hospital, First Military Medical University, Guangzhou 510515, China. rgaoh@163.com
Lin
Ang-Ru
AR
Shen
Kai-Jin
KJ
Pei
Guo-Xian
GX
Gu
Li-Qiang
LQ
Hu
Ba-Sheng
BS
D000818:Animals; D001860:Bone Plates; D004195:Disease Models, Animal; D004285:Dogs; D005260:Female; D005264:Femoral Fractures / Q000628:therapy*; D005593:Fracture Fixation, Internal; D018460:Fractures, Comminuted / Q000628:therapy*; D008297:Male; D013314:Stress, Mechanical; D016896:Treatment Outcome