Knee angular deformity correction using unicorticotomy and callus distraction by external fixation method and presentation of new external fixation device for varus correction of proximal tibia
2013
The main goal of this paper is to present clinical results of surgical
correction of angular (varus and valgus) deformities of knee area. Goal is
also to present new external fixation device for surgical treatment of varus
deformity of proximal tibia. As material it has been used series of 70
patients treated during the period of 6.5 years in University Orthopaedic and
traumatology clinic. Biomechanical investigation of 80% cut bone model fixed
by new external fixation device was performed in the measurement laboratory
of Mechanical Faculty University of Nis. Clinical results of treatment of 58
high tibial surgeries (49 varus and 9 valgus) and 12 distal femur surgeries
(2 varus and 10 valgus) showed that unicorticotomy and callus distraction by
the use of Mitkovic external fixation device leaded to correction and bone
union. Superficial pin tract infection happened in 9 patients and has been
successfully treated without pins removal. Biomechanical investigation of new
device showed that during axial loading of bone model by 690 N (70 kg)
movement of medial distal end of bone model was 0.30 mm while posterior
distal end of bone model was 0.26 mm. From results obtained in can be
concluded that unicorticotomy and gradual callus distraction by the use of
external fixation is one reliable method. Biomechanical testing of new
external fixation device showed that it is more stable in control of varus
and posterior position of proximal tibial fragment.
Keywords:
- Correction
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