Figure 2 - uploaded by Alexander Cherkashin
Content may be subject to copyright.
Source publication
Background: Hexapod external fixators often incorporate bone lengthening as part of a multi-planar
deformity correction plan. The hexapod struts, however, do not distract in the direction of bone
lengthening. Their oblique orientation to the ring creates a vector that is the summation of multiple
individual strut adjustments. We demonstrate that a...
Similar publications
Bone formation as well as bone healing capacity is known to be impaired in the elderly. Although bone formation is outpaced by bone resorption in aged individuals, we hereby present a novel path that considerably impacts bone formation and architecture: Bone formation is substantially reduced in aged individual owing to the experience of the adapti...
Citations
... Such situations often occur in pediatric practice and in correction of foot deformities [12,16,17,19]. The use of "extra short" sizes of the struts, Z-shaped plates and "free" rings does not allow solving this problem completely [4,15,[20][21][22][23]. As an alternative, a "minimized variant of the Ortho-SUV orthopedic hexapod" (minimized Ortho-SUV frame, OSFm) was developed [14,17]. ...
Introduction Currently, orthopedic hexapods have been effectively used for long bone, foot and large joint deformity correction in both adults and
children. Previous studies demonstrated the superiority of the reduction capabilities of the orthopedic hexapod Ortho-SUV Frame (OSF) in comparison
with other designs of external fixation devices. However, the reduction capabilities of the minimized version of this hexapod (minimized Ortho-SUV
Frame, OSFm) have not been studied yet. Purpose To identify the reduction capabilities of OSFm compared to OSF. Materials and methods The
bench test was performed using plastic models of the tibia osteotomized at the middle third of the shaft. One-ring modules were used to fix each of the
bone fragments. In the first series of the experiment, the reduction capabilities of OSFm with a standard strut size and in the second series OSF with a
short strut size were studied. In each series of experiments, three groups were studied depending on the method of fixing the struts to the rings: directly
to the ring, using straight plates, and using Z-shaped plates. Reduction capabilities were assessed by the maximum displacement of the distal bone
fragment relative to the proximal one in distraction, translation, angulation, and rotation. Results The magnitude of the maximum distraction of OSF
and OSFm with fixation of the struts directly to the rings and with the use of straight plates is the same (p > 0.05). With Z-plates, OSFm outperforms
OSF by 27.3 %. OSFm surpasses OSF by 2.8-29.3 % in terms of the planar-parallel movement. OSFm surpasses OSF by 29.6-55.4% in terms of angular
movement capabilities. The study of rotational movement found that OSFm exceeds the capabilities of OSF by 20.3-41.3%. Conclusion The findings
obtained indicate that OSFm, in comparison with OSF, has better deformity correction capabilities.
