The effect of sprue size and sprue attachment area on the casting success of cobalt chrome.
Cardiff Metropolitan University
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Abstract: This study examined what effect sprue size and sprue attachment area had on the success rate of casting cobalt chrome. Aim: The aim of the study was to see if sprue size and the attachment area position had an impact on the casting success as literature and manufacturing guide’s states. Material and Method: 30 ringed retentive wax shapes were created. All were bent at the same angle. The control group had a 2.5mm sprue which was flared on the thicker end of the wax pattern. The two experimental groups were both flared and sprued onto the thinner end of the wax pattern, one group having a 2.5mm sprue and the other a 4mm sprue. Results: All 30 samples were visually inspected and all were deemed as successfully casted. Conclusion: The size and attachment area of sprues on small, simple designs can produce successful castings when not following the manufacturer’s recommendation to sprueing.
BSc (Hons) Dental Technology
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