Aini Hayati, Abdul Rahim (2019) Surface roughness of cobalt chromium alloy fabricated with selective laser melting and conventional techniques / Aini Hayati Abdul Rahim. Masters thesis, Universiti Malaya.
Abstract
Introduction: Selective laser melting (SLM) is a new technique in fabricating cobalt chromium denture framework. However, surface properties of cobalt chromium denture framework fabricated using this technique have not been widely investigated. Aim: To investigate surface roughness of cobalt chromium alloy for removable partial denture fabricated with SLM technique. Materials and Method: Cobalt chromium denture frameworks were fabricated with two techniques (n= 10) ; the conventional lost wax casting (conventional group) and SLM techniques (SLM group). Specimens from conventional group were subjected to sandblasting and electropolishing. No treatment was employed for specimens from SLM group. All specimens were subjected to surface roughness measurement on polished and fitting surfaces using non-contact optical threedimensional metrology and surface roughness analysis machine (Infinite Focus Real 3D Alicona). Results: Statistical analysis showed no significant difference in surface roughness between the specimens from conventional and SLM groups (p>0.05). There was no statistically significant difference in surface roughness between the polished and fitting surfaces of SLM specimens (p>0.05). Conclusion: Surface roughness quality of cobalt chromium denture framework fabricated with SLM technique is comparable to that fabricated with the conventional lost wax casting technique. The surface roughness of SLM fabricated cobalt chromium denture frameworks carries the same surface roughness quality between the polished and fitting surfaces.
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