Design Project Two:
"Hip to be Square"
Intro to the Hip
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The hip joint is a ball and socket synovial joint, where the head of the femur rotates in the acetabulum of the hip bone. When this motion becomes painful or the joint is otherwise unable to articulate, a total hip arthroplasty may be prescribed to a patient. the surgery is a treatment for a variety of medical conditions including rheumatoid and degenerative arthritis of the hip (which is usually coupled with aging), hip dysplasia, and trauma.
The use of orthopaedic implants to promote free and painless movement of various joints in the body is a critical application of biomaterials.
The artificial hip is designed to mimic the natural hip joint with a ball and socket design where a ball is attached to a stem and fitted into the demur. The choice of material used to create the orthopaedic implant is greatly influenced by its design. The ball and stem portion of the implant is usually under tensile stress from impulsive and erratic movements, meaning it should be manufactured using a material with substantial toughness and high strength under fatigue. the cup, however, is typically under compressive stress and therefore could be constructed out of another material. In either case, implants are designed to last; a lifetime of twenty years is customary. Orthopaedic implants can be made out of ceramics, metals, polymers, or some combination of the three depending on the circumstances at hand.
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mr. Art Vandelay
Art Vandelay, 19 year old active male, with a history of injury. Specifically, hip injuries. Mr. Art Vandelay got into a car accident at the age of 12, leaving with a dislocation of his left hip. However, this dislocation was not something new for him, as he had experienced issues. with hip dislocations in the past, most in the right hip, rather than left. The doctors had to perform reduction, manipulating the bones back into their proper position, as this dislocation was particularly painful.
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A few years after the accident, while Mr. Vandelay was early into his secondary education he began to experience pain in his right hip. Even though he had experienced a vast number of partial dislocations and a handful of full dislocations of his right hip, the pain was mild. However, as time progressed, beginning at the age of 15, he began to experience increasing pain in his right hip. The next few years proved to be extremely frustrating as his pain was increasing and thus, impacting his ability to engage in any physical activities. Over time, Mr. Vandelay noticed that the range of motion of his right hip was decreasing and he had trouble walking due to an altered trendelberg gait pattern.
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Based of Mr. Vandelay's scan's it was noticed that his right leg was 2.5-cm shorter compared to left, as well as the femoral head completely deformed (not round, has jagged edges). Sclevotic tissue due to remodelling of the Acetabulum in the right hip. Based on the following information and any data that was provided, my team and I were able to diagnose Mr. Vandely with dysplasia of the hip.
Team Members
Aidan
Luka
Adam
Eric
Project Two Objectives
The project requires that our team:
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Diagnose our patients' condition that warrants total hip arthroplasty​​
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It is required that we correctly diagnose our patients' condition
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Design a custom hip implant for your assigned patient
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Our custom implant is required to fit our patients' hip arthroplasty
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Strong emphasis will be placed on the creativity of our team's design
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Our team is required to identify a list of acceptable materials for our design
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Our team is required to select one material for each component of our design
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Our team is required to identify how our implant is to be fixated to bone
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The type of fixation we choose is required to be reflected in our design
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Analyze your selected design parameters
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Our team is required to design a computer program that serves to verify our selected design parameters
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Subprogram 1 should calculate the minimum allowable implant stem diameter under this loading scenario
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Subprogram 2 should calculate the fatigue life for our implant design
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Subprogram 3 should calculate the number of years before there is a risk of femoral fracture
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Justify why our design meets the needs of our patient
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Our team is required to justify the form, materials section, and surgical fixation for our design
