Accuracy evaluation of metal copings fabricated by computer-aided milling and direct metal laser sintering systems

To assess the marginal and internal gaps of the copings fabricated by computer-aided milling and direct metal laser sintering (DMLS) systems in comparison to casting method. Ten metal copings were fabricated by casting, computer-aided milling, and DMLS. Seven mesiodistal and labiolingual positions w...

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Published in:The journal of advanced prosthodontics 2015, 7(2), 27, pp.122-128
Main Authors: Park, Jong-Kyoung, Lee, Wan-Sun, Kim, Hae-Young, Kim, Woong-Chul, Kim, Ji-Hwan
Format: Article
Language:English
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치의학
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Summary:To assess the marginal and internal gaps of the copings fabricated by computer-aided milling and direct metal laser sintering (DMLS) systems in comparison to casting method. Ten metal copings were fabricated by casting, computer-aided milling, and DMLS. Seven mesiodistal and labiolingual positions were then measured, and each of these were divided into the categories; marginal gap (MG), cervical gap (CG), axial wall at internal gap (AG), and incisal edge at internal gap (IG). Evaluation was performed by a silicone replica technique. A digital microscope was used for measurement of silicone layer. Statistical analyses included one-way and repeated measure ANOVA to test the difference between the fabrication methods and categories of measured points (α=.05), respectively. The mean gap differed significantly with fabrication methods (P
ISSN:2005-7806
2005-7814
DOI:10.4047/jap.2015.7.2.122