Publications

Publications

THA loading Arising from Increased Femoral Anteversion and Offset May Lead to Critical Cement Stress

This biomechanics study uses a musculo-skeletal model and finite element analysis to investigate the impact of femoral anteversion and prosthesis offset on the loading of a total hip arthroplasty. The research demonstrates that certain implant orientations, particularly a combination of increased anteversion and offset, can lead to critical cement stresses that may increase the risk of implant loosening.

Medial Collateral Ligament Insertion Site and Contact Forces in the ACL-Deficient Knee

This biomechanics paper uses a combination of cadaveric experiments and finite element modeling to analyze the forces on the medial collateral ligament (MCL) in the presence and absence of the anterior cruciate ligament (ACL). The study demonstrates that while ACL deficiency significantly increases MCL forces during anterior tibial loading, it does not significantly increase MCL forces during valgus loading, provided the MCL is intact.

Probabilistic Shape-Based Finite Element Analysis of Baboon Femurs

This biomechanics paper introduces a method for performing probabilistic finite element analysis on baboon femurs to account for natural variations. By modeling variability in bone geometry and density, the study predicts the range of potential biomechanical responses, specifically femur stiffness, for a given population.

Effects of Implant Design Parameters on Fluid Ingress During The Impingement/Subluxation

This biomechanics paper uses a computational fluid dynamics model to investigate how fluid motion during hip implant subluxation can draw wear debris into the bearing space. The study analyzes how factors like head size and position affect fluid velocity and particle transport, proposing that implant designs minimizing subluxation may help reduce wear and implant failure.

Research Report Trauma and Reconstructive Surgery

Prof. Dr. N. P. Haas

This is a research report from a Trauma and Reconstructive Surgery department, summarizing various biomechanics studies from 2001-2002. It covers topics ranging from cartilage and bone mechanics to fracture healing, THA implant performance, and spinal fusion devices, often employing experimental and computational methods to understand the role of mechanical factors in biological processes.