Bone stabilization device and methods of use
A technology for stabilizing equipment and equipment, applied in the direction of fixators, internal fixators, internal bone synthesis, etc., can solve problems such as inability to provide mechanical properties
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example 1
[0143] Preparation of Devices for Implantation
[0144] The device is fabricated in-house from a flat, one-piece grade 5 titanium alloy. The device was cut using a low speed saw and specified to a geometry obtained using a bone drill.
[0145] For osseointegration, three-dimensional structures were created at both ends on one side of some of the devices, and porous perforated interfaces were established at both ends of other devices.
[0146] Devices were prepared with three different geometries, all with three-dimensional osseointegration surfaces at both ends on one side of the device. The geometries are similar to those shown herein.
[0147] Device with perforated integrated surface and Figure 15 and 16 The device shown in is similar.
[0148] Implants were cleaned in 70% alcohol, allowed to air dry and steam sterilized prior to placement.
example 2
[0150] Posterolateral fusion in rabbits using the device of the present application
[0151] 2.1 Materials and methods
[0152] 2.1.1 Animals
[0153] Five scrawny mature New Zealand white rabbits were purchased from the University of New South Wales through an approved vendor. Animals were housed in approved single cages at the University of New South Wales. Animals were fed a standard diet with continuous access to water. Diet and water analyzes were kept on file at the research center. Animals were individually tagged by microchips and identified in their cages by identification cards.
[0154] 2.1.2 Equipment
[0155] Three devices with dimensions scaled to fit rabbits were used with the geometry shown here and three-dimensional osseointegration surfaces.
[0156] 2.1.3 Surgical procedure
[0157] Single-level posterolateral intertransverse fusions were performed bilaterally and adjacent to the vertebral bodies in the lumbar spine at L5-L6 after Animal Care and Ethics...
example 3
[0181] Posterolateral fusion in sheep using the device of the present application
[0182] Two adult sheep underwent a single level of posterolateral intertransverse fusion and the fusion was evaluated in substantially the same study as outlined in Example 2.
[0183] Flat titanium sheets were cut into parallelograms with a width of 25 mm to match the anatomical angle of the sheep transverse process. Perforations for bone ingrowth were drilled with a 2mm diameter. Two thicknesses of 1mm and 2mm were prepared and tested.
[0184] Biomechanical test results are shown in Figures 37-39 as the hysteresis curve degradation for each sample in bending from each mode of pure moment testing, where the Y-axis indicates torque (moment) and the X-axis indicates angle. Key parameters gleaned from these test results include stiffness in the mid-zone, range of motion, and linear regions. The line of fit is placed on the most linear part of the curve. This is extended to cross the zero mom...
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Abstract
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