Study of IPS EMPRESS

我们总结了临床试验的结果，并在专门科学会议(日本口腔修复学会和日本大学牙科学会)上报道了IPS Empress(Ivoclar Vivadent)在全冠和部分贴面全冠上应用的好处和存在的问题。我们的简历也被刊登在相关学会的期刊上。对临床试验中发现的洞的效果进行了进一步的评价，总结出嵌体和嵌体的洞具有良好的调整状态。我们的研究结果已在香港举行的第93届世界牙科会议(国际牙科联合会会议)和日本牙科学会四年一度的会议上公布。研究结果如下：(1)采用扫描电子显微镜(SEM)观察了铸锭加压成型前后内部结构的抛光表面和断裂表面。(2)氟化物对IPS Empress本身的刻蚀作用以及硅烷偶联剂加工条件的影响。(3)由于材料本身具有透光性，从阻色性能和透光率的角度进行了研究。为了研究修复材料的调整性，对基牙边缘形态进行了评价，制作了具有调整性的全冠修复器，并研究了包埋材料的影响。在未来的研究中，我们将以类似于所研究的DICOR铸造陶瓷系统的方式来评价Empress系统对釉质、牙本质和各种增强结构的粘结强度。

We have summerized the reslts of the clinical tests and reported the benefit and the problems of IPS EMPRESS (IVOCLAR VIVADENT) when it was used on complete and partial veneer crowns at the conference of the specialized science (The Japan Prosthodontic Society and Nihon University Society of Dentistry). Our resusts were also printed on the journals of the related societies. We have further evaluated the results on cavity found in the clinical tests and summarized the results on cavity with inlay and onlay having good adjustment status. The results of our study were reported at 93rd Annual World Conference of Dental Sciences (Conference of Federation Dentaire Internationale) held at Hong Kong, and also at Quadrennial Meeting of the Japanese Association for Dental Science. The results of our study were as follows :(1) Polished surface and ruptured surface of internal structure were examined under scanning electron microscope (SEM) before and after pressure formation of ingot for staining and layring.(2) Etching effect of fulorides on IPS EMPRESS itself and influence of processing condition of silane coupling agent(3) Because the material itself has light transmittance, study was performed from the viewpoints of color interrupting property and light transmittance. The use of resin cement to achieve color tone harmonization on crown color was assessed.(4) To study the adjustment of the restorative material, evaluation was made on marginal form of abutment tooth to fabricate crown restorative device with adjustment property, and the influence of investment material was studied.In the future study, we will evaluate the adhesive strength of the EMPRESS system to emamel, dentin and various types of reinforced structures in a manner similar to the study "DICOR" castable ceramic system.