Journal article
A method to represent heterogeneous materials for rapid prototyping: the Matryoshka approach
Rapid prototyping journal, Vol.20(5), pp.390-402
01/01/2014
DOI: 10.1108/RPJ-10-2012-0095
PMCID: PMC4480776
PMID: 26120277
Abstract
Purpose - The purpose of this paper is to present a new method for representing heterogeneous materials using nested STL shells, based, in particular, on the density distributions of human bones.
Design/methodology/approach - Nested STL shells, called Matryoshka models, are described, based on their namesake Russian nesting dolls. In this approach, polygonal models, such as STL shells, are "stacked" inside one another to represent different material regions. The Matryoshka model addresses the challenge of representing different densities and different types of bone when reverse engineering from medical images. The Matryoshka model is generated via an iterative process of thresholding the Hounsfield Unit (HU) data using computed tomography (CT), thereby delineating regions of progressively increasing bone density. These nested shells can represent regions starting with the medullary (bone marrow) canal, up through and including the outer surface of the bone.
Findings - The Matryoshka approach introduced can be used to generate accurate models of heterogeneous materials in an automated fashion, avoiding the challenge of hand-creating an assembly model for input to multi-material additive or subtractive manufacturing.
Originality/value - This paper presents a new method for describing heterogeneous materials: in this case, the density distribution in a human bone. The authors show how the Matryoshka model can be used to plan harvesting locations for creating custom rapid allograft bone implants from donor bone. An implementation of a proposed harvesting method is demonstrated, followed by a case study using subtractive rapid prototyping to harvest a bone implant from a human tibia surrogate.
Details
- Title: Subtitle
- A method to represent heterogeneous materials for rapid prototyping: the Matryoshka approach
- Creators
- Shuangyan Lei - Iowa State UniversityMatthew C. Frank - Iowa State UniversityDonald D. Anderson - University of IowaThomas D. Brown - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Rapid prototyping journal, Vol.20(5), pp.390-402
- DOI
- 10.1108/RPJ-10-2012-0095
- PMID
- 26120277
- PMCID
- PMC4480776
- NLM abbreviation
- Rapid Prototyp J
- ISSN
- 1355-2546
- eISSN
- 1758-7670
- Publisher
- Emerald Group Publishing
- Number of pages
- 13
- Grant note
- Roy J. Carver Charitable Trust at the University of Iowa P50AR055533 / NATIONAL INSTITUTE OF ARTHRITIS AND MUSCULOSKELETAL AND SKIN DISEASES; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH National Institute of Arthritis & Musculoskeletal & Skin Diseases (NIAMS) P50AR055533; R21AR054015 / NIH/NIAMS; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH National Institute of Arthritis & Musculoskeletal & Skin Diseases (NIAMS) Musculoskeletal Transplant Foundation State of Iowa Economic Development under the Grow Iowa Values Fund
- Language
- English
- Date published
- 01/01/2014
- Academic Unit
- Roy J. Carver Department of Biomedical Engineering; Orthopedics and Rehabilitation; Industrial and Systems Engineering
- Record Identifier
- 9984304682202771
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