Bone scaffold design selection by using analytical hierarchy process (AHP)

Loo, Heoy Shin (2015) Bone scaffold design selection by using analytical hierarchy process (AHP). Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Bone scaffold is used to aid the regenerative of human organ tissues that causes bone fracture. Bone fracture is normally caused by the exertion of exceeding force to the bone that can’t be borne or bone disease such as osteoporosis. Hence, the use of bone scaffold is needed to provide comfort to the patient and to slowly replace the metal plate for bone implants. Since there are demands in the market for an effective bone scaffold design, the objective of this project is to study about the application of additive manufacturing (AM) and bone scaffold design in medical application as well as to compare the effectiveness of several materials for its application. Four design of bone scaffolds had been proposed and simulated for compression test and torsional test. The four different designs of bone structural was designed using a CAD software. In order to select the best bone scaffold design, Analytical Hierarchy Process (AHP) was used as the method to aid the selection process. Based on comparative analysis, it was found that Design 1 was the best design. This was mainly due to the orderly design arrangement that permits higher strength compared to other arrangement of the design of bone scaffold. Furthermore, this project compares three different types of materials namely Alumina Bio-ceramic, Bio-active Glasses and Calcium Phosphate Bio-ceramic. The comparative analysis shows that the best material is Alumina Bio-ceramic. This material has the highest strength compared with other materials due to its capability to sustain the force exerted on it and hence fulfil the priority of setting the strength as the main rating purpose. However, this material is the most expensive material compared to other two materials. In conclusion, all of the objectives are achieved.

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