Presentation Title

Investigating Fracture Mechanics of 3D Printed Vertebrae Models in a Simulated Environment

Faculty Mentor

Mehrdad Haghi

Start Date

23-11-2019 11:00 AM

End Date

23-11-2019 11:15 AM

Location

Markstein 105

Session

oral 2

Type of Presentation

Oral Talk

Subject Area

engineering_computer_science

Abstract

There are 1.5 million annual cases of bone fracture, of which 700,000 involve vertebral fractures [1]. Current cementing treatments are expensive, prone to subsequent fracture, and require an adequate replacement. Rapidly prototyped synthetic vertebrae models will address the aforementioned issues and enable widespread minimally invasive research. This project investigates the compressive strength of 3D printed acrylonitrile butadiene styrene (ABS) vertebrae as a function of porosity. ABS was chosen as an inexpensive material whose mechanical properties are widely accepted. Silicone discs were used to appropriately emulate soft tissue between vertebrae and will ensure an accurate environment when performing compression tests. The relationship between compressive strength and porosity is expected to be inversely proportional because structural integrity weakens as the internal pore size increases. Porosity will be changed by a computational technique, which allows for highly controlled pore frequency and size. The ABS model will be optimized to imitate bone properties and aid future material selection. The transition to updated materials will provide a model with a spongy interior and hard shell. Effectively applying the structural behavior of the model to its physiological environment is the ultimate goal to accumulate precise results. This highly developed model will permit research of future vertebral fracture treatments without the risk of human or animal operations.

[1] - Riggs BL, Melton LJ 3rd. The worldwide problem of osteoporosis: Insights afforded by epidemiology. Bone. 1995 Nov;17(5 Suppl):505S–511S.

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Nov 23rd, 11:00 AM Nov 23rd, 11:15 AM

Investigating Fracture Mechanics of 3D Printed Vertebrae Models in a Simulated Environment

Markstein 105

There are 1.5 million annual cases of bone fracture, of which 700,000 involve vertebral fractures [1]. Current cementing treatments are expensive, prone to subsequent fracture, and require an adequate replacement. Rapidly prototyped synthetic vertebrae models will address the aforementioned issues and enable widespread minimally invasive research. This project investigates the compressive strength of 3D printed acrylonitrile butadiene styrene (ABS) vertebrae as a function of porosity. ABS was chosen as an inexpensive material whose mechanical properties are widely accepted. Silicone discs were used to appropriately emulate soft tissue between vertebrae and will ensure an accurate environment when performing compression tests. The relationship between compressive strength and porosity is expected to be inversely proportional because structural integrity weakens as the internal pore size increases. Porosity will be changed by a computational technique, which allows for highly controlled pore frequency and size. The ABS model will be optimized to imitate bone properties and aid future material selection. The transition to updated materials will provide a model with a spongy interior and hard shell. Effectively applying the structural behavior of the model to its physiological environment is the ultimate goal to accumulate precise results. This highly developed model will permit research of future vertebral fracture treatments without the risk of human or animal operations.

[1] - Riggs BL, Melton LJ 3rd. The worldwide problem of osteoporosis: Insights afforded by epidemiology. Bone. 1995 Nov;17(5 Suppl):505S–511S.