Image-based analysis and quantification of ulna morphology for improved implants design.

Till date, there are inherent difficulties in estimating the size and fit of elbow prosthesis based solely on plain radiographs of patients. As such, a better understanding of the morphology of the proximal ulna will have implications for future prosthetic design, preoperative planning, and cement r...

Full description

Saved in:
Bibliographic Details
Main Author: Ong, Yi Bin.
Other Authors: Poh Chueh Loo
Format: Final Year Project
Language:English
Published: 2012
Subjects:
Online Access:http://hdl.handle.net/10356/50013
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Nanyang Technological University
Language: English
id sg-ntu-dr.10356-50013
record_format dspace
spelling sg-ntu-dr.10356-500132023-03-03T15:33:35Z Image-based analysis and quantification of ulna morphology for improved implants design. Ong, Yi Bin. Poh Chueh Loo School of Chemical and Biomedical Engineering Singapore General Hospital DRNTU::Science::Medicine::Biomedical engineering Till date, there are inherent difficulties in estimating the size and fit of elbow prosthesis based solely on plain radiographs of patients. As such, a better understanding of the morphology of the proximal ulna will have implications for future prosthetic design, preoperative planning, and cement removal during revision surgery, all of which benefit the patients eventually. Thus, the objective of the project is to define intra-medullary dimensions and morphological relations in cored cadaveric ulnas with a CT-based image analysis program. CT scans of 17 pre-cored and post-cored cadaveric proximal ulnas were analyzed to determine the intra-medullary dimensions using reconstructed 3D models. A local coordinate system was established for the individual ulna. The posterior offset, lateral offset, minimum diameter and maximum diameter of the intra-medullary canal were calculated with respect to the local origin. Generally, the intra-medullary canal in the supine position offsets linearly, 5 mm posteriorly and 19 mm laterally from 0R to 6R, where R represents the radius of the circle fitted to the trochlear ridge. The minimum and maximum diameters of the canal increase from the origin and peak at 2.3R with diameter values of 7.08 ± 1.74 mm and 10.65 ± 2.16 mm respectively. Thereafter, they decrease in a linear fashion till 6R. Our findings support the current tapered component of the proximal ulna stemmed implants and suggest the use of 3D CT scans of the elbow for pre-operative planning and sizing of implants. Bachelor of Engineering (Chemical and Biomolecular Engineering) 2012-05-28T07:36:08Z 2012-05-28T07:36:08Z 2012 2012 Final Year Project (FYP) http://hdl.handle.net/10356/50013 en Nanyang Technological University 74 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Science::Medicine::Biomedical engineering
spellingShingle DRNTU::Science::Medicine::Biomedical engineering
Ong, Yi Bin.
Image-based analysis and quantification of ulna morphology for improved implants design.
description Till date, there are inherent difficulties in estimating the size and fit of elbow prosthesis based solely on plain radiographs of patients. As such, a better understanding of the morphology of the proximal ulna will have implications for future prosthetic design, preoperative planning, and cement removal during revision surgery, all of which benefit the patients eventually. Thus, the objective of the project is to define intra-medullary dimensions and morphological relations in cored cadaveric ulnas with a CT-based image analysis program. CT scans of 17 pre-cored and post-cored cadaveric proximal ulnas were analyzed to determine the intra-medullary dimensions using reconstructed 3D models. A local coordinate system was established for the individual ulna. The posterior offset, lateral offset, minimum diameter and maximum diameter of the intra-medullary canal were calculated with respect to the local origin. Generally, the intra-medullary canal in the supine position offsets linearly, 5 mm posteriorly and 19 mm laterally from 0R to 6R, where R represents the radius of the circle fitted to the trochlear ridge. The minimum and maximum diameters of the canal increase from the origin and peak at 2.3R with diameter values of 7.08 ± 1.74 mm and 10.65 ± 2.16 mm respectively. Thereafter, they decrease in a linear fashion till 6R. Our findings support the current tapered component of the proximal ulna stemmed implants and suggest the use of 3D CT scans of the elbow for pre-operative planning and sizing of implants.
author2 Poh Chueh Loo
author_facet Poh Chueh Loo
Ong, Yi Bin.
format Final Year Project
author Ong, Yi Bin.
author_sort Ong, Yi Bin.
title Image-based analysis and quantification of ulna morphology for improved implants design.
title_short Image-based analysis and quantification of ulna morphology for improved implants design.
title_full Image-based analysis and quantification of ulna morphology for improved implants design.
title_fullStr Image-based analysis and quantification of ulna morphology for improved implants design.
title_full_unstemmed Image-based analysis and quantification of ulna morphology for improved implants design.
title_sort image-based analysis and quantification of ulna morphology for improved implants design.
publishDate 2012
url http://hdl.handle.net/10356/50013
_version_ 1759853992966356992