Error Analysis of FDM Fabricated Medical Replica
In recent years the application of 3D computer aided design modelling software in conjunction with rapid prototyping (RP) has been of keen interest to reconstructive surgeons and engineers for the design and fabrication of facial prostheses. Although the technology proved the ability to manufacture and to fit prosthesis to a patients unique proportions quickly and with relatively low cost, the model accuracy is a key factor to the applicability of such technology. In this paper the errors generated during the fabrication stage of anatomical replicas derived from Computed Tomography (CT) coupled with the rapid prototyping technique of fused deposition modelling (FDM) is investigated. An evaluation on the errors generated during the fabrication process of various shapes of anatomical parts (skull or mandible) as well as of different human sizes (infant, female or male) is carried out. A comparison between the linear measurements of eleven landmarks on the virtual model of a skull and nine for the mandible of patient specific and its replica was conducted. Furthermore, eight landmarks were chosen to evaluate the bone thickness variation over the fabricated replicas. The results showed undersized replicas with an overall absolute average deviation of 0.24% with an average standard deviation of 0.16% of the skull models and 0.22% with a 0.11% standard deviation of the mandibles. Furthermore, a high level of accuracy is reflected in the representation of the measured bone thickness with deviations in the order of one hundredth of a millimetre being reported.The study demonstrates an outstanding accuracy using FDM process for the fabrication of anatomical replicas in comparison to other rapid prototyping techniques.
Rapid prototypes fused deposition modeling Biomedical Engineering Computer aided design error analysis.
Ihab El-Katatny S.H. Masood Y.S. Morsi
Faculty of Engineering and Industrial Science, Swinburne University of Technology, Hawthorn, Melbourne,Australia 3122
国际会议
北京
英文
291-301
2008-11-06（万方平台首次上网日期，不代表论文的发表时间）