Orthopedic Casting Slipper Kit with Removal Sock
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Solution Overview
Problem
Existing methods for creating custom foot castings for orthotics are time-consuming, messy, inaccurate, and often result in undesirable bridging or tenting at the arch, making it difficult to remove the hardened cast due to friction and vacuum suction.
Innovation Solution
An orthotic impression casting slipper kit with a removal sock made of diaphanous fabric with a low coefficient of friction, placed between the patient's foot and the barrier envelope, along with a resilient fabric casting slipper and arch strap to prevent bridging and facilitate easy removal of the hardened cast.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a pre-shaped slipper form is used to make the casting, then the messiness and handling problems are reduced, but the form only loosely fits the patient's foot and requires pressing or folding which creates folds that detract from accuracy
Solution Approach 1:
The casting slipper is made from resilient fabric that dynamically adapts to the foot's shape through elastic expansion and contraction, allowing the form to transition from a loose fit to a precise conformal shape without manual pressing or folding operations
Solution Approach 2:
The physical state of the fabric is changed from rigid pre-shaped form to resilient elastic state, enabling the material to change its shape parameters to match the foot's contours while maintaining handling ease
2Manufacturing precision
If the casting slipper is made resilient and elastic to conform to the foot, then the fit and accuracy are improved, but the resilient fabric tends to bridge or tent in the area of the arch
Solution Approach 1:
The casting slipper is segmented into multiple functional zones with different fabric properties: a non-resilient panel in the arch area to prevent bridging, and resilient fabric in other areas to ensure conformability, allowing each zone to perform its specific function independently
Solution Approach 2:
Different regions of the casting slipper are assigned different fabric qualities - the arch area uses non-resilient fabric for stability while other areas use resilient fabric for conformability, ensuring optimal performance in each local region
3Ease of operation
If the casting slipper is made thin and smooth for easy removal, then the removal process is facilitated, but the slipper may not provide sufficient structural support for accurate casting
Solution Approach 1:
The casting slipper uses a composite construction combining resilient fabric for conformability, non-resilient fabric for arch support, and a plastic barrier envelope for release properties, achieving both structural integrity and easy removal through material composition rather than thickness alone
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The kit significantly improves the ease of removing the hardened cast from the patient's foot by reducing friction and vacuum suction, ensuring accurate conformance and minimizing damage to the cast during removal and transportation.
Implementation Method 1
a sheer removal sock made of diaphanous fabric with a low coefficient of friction, placed between the patient's foot and the barrier envelope
Implementation Method 2
a resilient fabric casting slipper that, when positioned on a patient's foot, extends upwardly from a plantar surface to an opened end proximate the patient's instep. The slipper fabric is sufficiently resilient to substantially conform to the patient's foot
Implementation Method 3
a quantity of curable resin sufficient to harden the casting slipper into a hardened cast foot casting
Data Source
AI summary
An improved orthopedic casting slipper kit for custom molding of a foot casting, wherein the kit includes a low-cut casting slipper shaped to extend upwardly on a patient's foot from a plantar surface of the foot to an open end. and a quantity of curable resin for impregnation into the fabric of the casting slipper, the improvement comprising a sheer removal sock which is first placed on the patient's foot, prior to the casting slipper to facilitate removal of the hardened mold.