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王睿捷; 刘敏; 宋丹阳; 杨随; 王乔; 王磊; 冯海兰
北京大学学报(医学版), 2019, Volume: 51, Issue: 1Journal Article
R783.3; 目的:比较采用粉浆堆塑工艺、热压铸造工艺及计算机辅助设计/计算机辅助制造(computer aided design/computer aided manufacturing,CAD/CAM)技术制作的不同材料部分贴面的边缘形貌.方法:选择无明显磨耗、龋坏,表面釉质光滑完整的人前磨牙30颗,随机分为5组,每组6颗,分别采用耐火代型粉浆堆塑工艺制作Noritake(R)长石质烤瓷部分贴面,热压铸造工艺制作IPS E.max Press部分贴面,CAD/CAM技术制作VITA Mark Ⅱ、VITA Suprinity、VITA Enamic部分贴面.部分贴面试件粘接完成后,按照临床步骤进行边缘修整及抛光,获得在离体牙上粘接完成的部分贴面.通过肉眼观察、扫描电镜及色散能谱,记录并分析部分贴面边缘微观形貌及粘接剂暴露宽度.结果:不同加工方式及材料的部分贴面在粘接后经过修整、抛光,可获得肉眼可见的较光滑的材料表面及菲薄的刃状边缘.Noritake烤瓷组边缘较粗糙,粘接剂带状暴露量为(106.00 ±9.17) μm;E.max Press组边缘较平整,粘接剂暴露量为(138.33 ±20.59) μm;Enamic组边缘平滑,粘接剂暴露宽度较大,为(186.00 ±5.66)μm;Mark Ⅱ组与Suprinity组边缘虽有粗糙不平,但粘接剂暴露较少,分别为(50.67 ±7.51) μm及(65.67 ±17.90)μm;除Mark Ⅱ组与Suprinity组外,其余各组间差异均有统计学意义.结论:不同加工方法及材料制作的部分贴面,经过粘接、修整及抛光后,均可获得刃状边缘,但各组粘接剂有不同程度暴露,暴露量大小为Mark Ⅱ组/Suprinity组<Noritake组<E.max Press组<Enamic组,可见不同加工方式和材料制作的部分贴面边缘形貌存在差异.
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