Our final model design

Final Model

Prototype features:

Joints: Wrist, Elbow, and Shoulder.

Prototype length

44.6 cm.

Left arm prototype.

Joints: Wrist, Elbow, and Shoulder.

Main manufacturing process 3D printing.

Complete anatomy of the arm.

Training features of the prototype:

It allows the recreation of radial head subluxation, also known as "Nursemaid's elbow."

It allows for proper arm movements.

It allows for the application of supination and pronation techniques to correct the subluxation.

Bones

Humerus Bone (STL)

Mechanism (CAD)

Ulna Bone (STL)

The mechanism completely replaces the radius bone in the prototype.

Mechanism

How the mechanism works.

Manufacturing processes: 3D printing

Video demonstration

Studio_Project_V1.mp4

Joints

Ligaments Geometry (AutoCad)

Elbow Joint (Ligaments)

The geometries of the ligaments were designed based on the anatomy of the elbow. One of the most important points is that the head of the radius is located within the annular ligament. Therefore, this characteristic was recreated in the radial collateral ligament of the prototype.

The material of the ligaments is silicone.

Manufacturing processes: laser Cutting

Wrist Joint

Based on the anatomy of the wrist, a two-piece assembly was designed that allows for a distance between the mechanism and the ulna bone using the green piece. Additionally, this piece acts as a hinge, enabling rotational movements of the arm.

The purple piece is responsible for assembling the hand to the bones of the forearm.

Manufacturing processes: 3D printing.

Distal radioulnar (CAD)

Radiocarpal joint (CAD)

Hand piece (CAD)

Shoulder Joint (CAD)

Shoulder Joint

Based on the anatomy of the elbow, a ball joint was used to simulate the shoulder joint of a patient.

Manufacturing processes: 3D printing.

Stand Base

Stand

A camera stand holds the prototype in the air, simulating the suspended arm of a patient with a nursemaid's elbow. This subluxation is common in young children, so doctors often seat the patient on a table to provide a comfortable position for repairing the subluxation. This stand simulates the position of a child sitting at a table and also allows students to adjust the prototype to their desired height.

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