Fabrication and Testing of a Custom Potting System for Porcine Hip Specimens
Faculty Mentor Information
Dr. Trevor Lujan, Boise State University
Dr. Erin Mannen, Boise State University
Presentation Date
7-2025
Abstract
Developmental dysplasia of the hip (DDH) is a biomechanical disease of infancy that requires intervention in 2 of 1000 infants, yet understanding of disease biomechanics is limited. Therefore, the objective of this study was to fabricate and test a potting system for porcine hips with surgically induced hip dysplasia in a six degrees of freedom joint simulator (AMTI VIVO). The VIVO allows for the application of simulated forces and rotations to in-vitro joint specimens. To properly test the specimens, a repeatable method of fixturing and testing the specimens was needed. To achieve this, an aluminum potting system was developed. This system ensures reproducibility in the fixturing and testing of porcine hip specimens in the VIVO. In addition to the aluminum pots, the pelvis is secured during potting with a 3D-printed jig. The potted specimen is attached to the VIVO, where a ground reaction force and rotations about the flexion/extension, abduction/adduction, and interior/exterior axis were applied. These forces and rotations were recorded over twenty cycles. The results from this pilot study will be used to validate a computation model of a porcine hip.
Fabrication and Testing of a Custom Potting System for Porcine Hip Specimens
Developmental dysplasia of the hip (DDH) is a biomechanical disease of infancy that requires intervention in 2 of 1000 infants, yet understanding of disease biomechanics is limited. Therefore, the objective of this study was to fabricate and test a potting system for porcine hips with surgically induced hip dysplasia in a six degrees of freedom joint simulator (AMTI VIVO). The VIVO allows for the application of simulated forces and rotations to in-vitro joint specimens. To properly test the specimens, a repeatable method of fixturing and testing the specimens was needed. To achieve this, an aluminum potting system was developed. This system ensures reproducibility in the fixturing and testing of porcine hip specimens in the VIVO. In addition to the aluminum pots, the pelvis is secured during potting with a 3D-printed jig. The potted specimen is attached to the VIVO, where a ground reaction force and rotations about the flexion/extension, abduction/adduction, and interior/exterior axis were applied. These forces and rotations were recorded over twenty cycles. The results from this pilot study will be used to validate a computation model of a porcine hip.