Search

Your search keyword '"Taghvaei, Moein"' showing total 7 results
Start Over Author "Taghvaei, Moein"
7 results on '"Taghvaei, Moein"'

3. Fixation strength of swelling copolymeric anchors in artificial bone.

Author

Taghvaei, Moein, Taheri, Mehrangiz, Sadighi, Amirreza, Zegarski, Ryan, Schaer, Thomas P., Palmese, Giuseppe R., Najafi, Ahmad R., and Siegler, Sorin

Subjects
*ARTIFICIAL bones, *ORTHOPEDIC surgery, *POROUS materials, *OSSEOINTEGRATION, *BONE density
Abstract

Fixation with suture anchors and metallic hardware for osteosynthesis is common in orthopedic surgeries. Most metallic commercial bone anchors achieve their fixation to bone through shear of the bone located between the threads. They have several deficiencies, including stress‐shielding due to mechanical properties mismatch, generation of acidic by‐products, poor osteointegration, low mechanical strength and catastrophic failure often associated with large bone defects that may be difficult to repair. To overcome these deficiencies, a swelling porous copolymeric material, to be used as bone anchors with osteointegration potential, was introduced. The purpose of this study was to investigate the fixation strength of these porous, swelling copolymeric bone anchors in artificial bone of various densities. The pull‐out and subsidence studies indicate an effective fixation mechanism based on friction including re‐fixation capabilities, and minimization of damage following complete failure. The study suggests that this swelling porous structure may provide an effective alternative to conventional bone anchors, particularly in low‐density bone. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

6. Optimization of Additively Manufactured Sandwich Panels with Composite Face Sheets

Author

Taghvaei, Moein

Subjects
Chemical engineering, Flexure--Testing, FOS: Chemical engineering
Abstract

Sandwich structures are of great interest to researchers all around the world for their flexural stiffness, strength-to-weight ratio, and high energy absorption. These structures are extensively used in the aerospace, naval, and automotive industries. In this work, we describe a novel method to make monolithic sandwich panels with fiber-reinforced face sheets using a DLP 3D printer. The method was tuned to achieve high fidelity parts with accurate dimensions. For example, the amount of photo absorber was adjusted and found to be essential in achieving high print resolution. Samples with and without fiber-reinforced face sheets were printed using two different core geometries, honeycomb and rectangular, and printed in two different orientations, in-plane and out-of-plane. The specific stiffness of each of these four sample categories was then analyzed via 3-Point-Bending tests. In both reinforced and non-reinforced sandwich panels, the honeycomb structure showed the highest stiffness-to-weight ratio for out-of-plane orientation, while the rectangular structure showed the highest stiffness-to-weight ratio for in-plane orientation. Reinforced samples had a specific stiffness that was 130% and 240% more than that of non-reinforced samples in out-of-plane and in-plane samples, respectively.

Published
2020
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results