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KMID : 1035320230500040217
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Korean Society for Dental Materials
2023 Volume.50 No. 4 p.217 ~ p.231
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Wear resistance of dental resin crowns in accordance with different additive manufacturing technologies and abrader types during chewing simulations
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Choi Myoung-Ji
Kwon Jae-Sung
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Abstract
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Recently, dental resin crowns have been widely utilized in various applications through additive manufacturing (AM) technology in dentistry. Additionally, zirconia and metal crowns can be used as restorative and prosthetic materials, benefiting from a variety of advantages. However, the use of these materials may result in wear loss of temporary resin crowns fabricated using AM technology when they are used as antagonists. This study examined the wear resistance of dental resin crown specimens produced using different AM technologies against two common antagonist crown materials: zirconia and metal crown. Three types of dental resin crowns, produced using different methods, were examined: SLA, DLP, and FDM.
The specimens were subjected to a two-body wear test with zirconia and cobalt-chrome alloy as the antagonists under specific conditions (5 mm, 2 mm, 5 kg, 1.2 Hz, 20,000 cycles). The SLA- and DLP-printed resins showed no significant difference in wear volume loss and wear maximal depth loss between the two differently produced specimens (p > 0.05). However, the FDM-printed resin showed a significantly increased wear volume loss and maximal depth loss compared to the other two specimens (p < 0.05). There was no significant difference in wear volume loss between zirconia and CoCr alloy abraders (p > 0.05). However, when examining the resin specimens, wear volume loss and wear depth loss deviation were generally higher when CoCr alloy was used compared to the use of the zirconia alloy as the abrader. In clinical terms, it can be concluded that the type of antagonists does not influence the wear resistance of temporary resin crowns.
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KEYWORD
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Additive manufacturing, Co-Cr alloy, DLP, FDM, SLA, Temporary restoration, Zirconia, Wear resistance
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