材料科学
蜡
3d打印
桩核
牙冠(牙科)
收缩率
印象
根管
复合材料
芯(光纤)
丙烯酸树脂
牙科
生物医学工程
计算机科学
医学
万维网
涂层
作者
Tarin Piangsuk,Pantip Henprasert,Piriya Boonsiriphant,Terry J. Lindquist
摘要
Abstract Purpose The purpose of this research was to compare the accuracy of three‐dimensionally (3D) printed post and core fabricated with two different materials: reinforced wax and castable resin. Materials and methods Fifteen extracted single root central incisors were selected. Root canal treatment and tooth preparation for crown were performed on all teeth. Eleven millimeters post space was created with standardized prefabricated fiber post drill. Polyvinylsiloxane impression material was used for root canal impressions. Each impression was then 3D scanned using an extraoral scanner and cast posts and cores were designed using 3Shape software. The digitally designed post and cores were 3D printed with two different materials: castable wax resin and castable resin. The castable resin patterns were scanned before and after complete polymerization. The wax patterns were also scanned. Digital volumetric measurement using Geomagic® Control X™ software was performed to determine accuracy. Results The printed post and core had reduced volume (16.09 ± 3.839 mm 3 ) compared to the digital design (17.828 ± 3.904, p < 0.05). Before complete polymerization, the accuracy of 3D printed resin pattern (16.464 ± 3.017) was found to be superior to post and core printed with wax (16.193 ± 3.018, p < 0.05). However, no volume difference was found between completely polymerized resin (16.09 ± 3.839) and wax (16.044 ± 3.834, p = 1). Conclusion 3D printed post and core showed significant volume shrinkage from the digital files used to create them. However, different materials had no effect on the accuracy of 3D printed post and core.
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