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Determination of the Maximal Corrective Ability and Optimal Placement of the Ortho-SUV Frame for Femoral Deformity with respect to the Soft Tissue Envelope, a Biomechanical Modelling Study.

Skomoroshko PV, Vilensky VA, Hammouda AI, Fletcher MD, Solomin LN - Adv Orthop (2014)

Bottom Line: The Ortho-SUV frame is an innovative hexapod which permits unique customisation to individual patient anatomy to maximise tolerance and optimal range of deformity correction.We hypothesised that the optimal configuration and maximal degree of correction achievable by the Ortho-SUV frame can be biomechanically modelled and applied clinically.The ideal frame configuration is determined for correction of deformity in all locations of the femur with the maximal parameters of correction calculated whilst avoiding and mitigating soft tissue irritation from bulky frame construction.

View Article: PubMed Central - PubMed

Affiliation: Vreden Russian Research Institute of Traumatology and Orthopedics, 8 Baykova Street, Saint Petersburg 195427, Russia.

ABSTRACT
Circular fixation according to the Ilizarov method is a well-recognised modality of treatment for trauma and deformity. One shortcoming of the traditional fixator is its limited ability to correct more than one plane of deformity simultaneously, leading to lengthy frame-time indices. Hexapod circular fixation utilising computer guidance is commonplace for complex multidimensional deformity but difficulties often arise with correction of femoral deformity due to bulkiness of the frame construct, particularly in proximal deformity and in patients of increased size. The Ortho-SUV frame is an innovative hexapod which permits unique customisation to individual patient anatomy to maximise tolerance and optimal range of deformity correction. We hypothesised that the optimal configuration and maximal degree of correction achievable by the Ortho-SUV frame can be biomechanically modelled and applied clinically. A study was constructed using Ortho-SUV and femoral limb models to measure deformity correction via differing frame constructs and determine optimal frame configuration to achieve correction in proximal, middle, and distal third deformities with respect to the soft tissue envelope. The ideal frame configuration is determined for correction of deformity in all locations of the femur with the maximal parameters of correction calculated whilst avoiding and mitigating soft tissue irritation from bulky frame construction.

No MeSH data available.


Related in: MedlinePlus

Models for the study of anatomical impingement of the OSF: (a) front view; (b) side view.
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Related In: Results  -  Collection


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fig2: Models for the study of anatomical impingement of the OSF: (a) front view; (b) side view.

Mentions: Models for the proximal, middle, and distal femoral thirds were assembled using plastic femurs. Soft tissue was modeled from polymer discs representing normal anatomy (Figure 2). Ring dimensions were selected so that the distance between the discs and the inner edge of the ring ranged from 3 to 4 cm. The form of disks and their arrangement relative to the bone were performed according to the “Atlas for the Insertion of Transosseous Elements Reference Positions” [2].


Determination of the Maximal Corrective Ability and Optimal Placement of the Ortho-SUV Frame for Femoral Deformity with respect to the Soft Tissue Envelope, a Biomechanical Modelling Study.

Skomoroshko PV, Vilensky VA, Hammouda AI, Fletcher MD, Solomin LN - Adv Orthop (2014)

Models for the study of anatomical impingement of the OSF: (a) front view; (b) side view.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4291198&req=5

fig2: Models for the study of anatomical impingement of the OSF: (a) front view; (b) side view.
Mentions: Models for the proximal, middle, and distal femoral thirds were assembled using plastic femurs. Soft tissue was modeled from polymer discs representing normal anatomy (Figure 2). Ring dimensions were selected so that the distance between the discs and the inner edge of the ring ranged from 3 to 4 cm. The form of disks and their arrangement relative to the bone were performed according to the “Atlas for the Insertion of Transosseous Elements Reference Positions” [2].

Bottom Line: The Ortho-SUV frame is an innovative hexapod which permits unique customisation to individual patient anatomy to maximise tolerance and optimal range of deformity correction.We hypothesised that the optimal configuration and maximal degree of correction achievable by the Ortho-SUV frame can be biomechanically modelled and applied clinically.The ideal frame configuration is determined for correction of deformity in all locations of the femur with the maximal parameters of correction calculated whilst avoiding and mitigating soft tissue irritation from bulky frame construction.

View Article: PubMed Central - PubMed

Affiliation: Vreden Russian Research Institute of Traumatology and Orthopedics, 8 Baykova Street, Saint Petersburg 195427, Russia.

ABSTRACT
Circular fixation according to the Ilizarov method is a well-recognised modality of treatment for trauma and deformity. One shortcoming of the traditional fixator is its limited ability to correct more than one plane of deformity simultaneously, leading to lengthy frame-time indices. Hexapod circular fixation utilising computer guidance is commonplace for complex multidimensional deformity but difficulties often arise with correction of femoral deformity due to bulkiness of the frame construct, particularly in proximal deformity and in patients of increased size. The Ortho-SUV frame is an innovative hexapod which permits unique customisation to individual patient anatomy to maximise tolerance and optimal range of deformity correction. We hypothesised that the optimal configuration and maximal degree of correction achievable by the Ortho-SUV frame can be biomechanically modelled and applied clinically. A study was constructed using Ortho-SUV and femoral limb models to measure deformity correction via differing frame constructs and determine optimal frame configuration to achieve correction in proximal, middle, and distal third deformities with respect to the soft tissue envelope. The ideal frame configuration is determined for correction of deformity in all locations of the femur with the maximal parameters of correction calculated whilst avoiding and mitigating soft tissue irritation from bulky frame construction.

No MeSH data available.


Related in: MedlinePlus