Dhawan Pankaj, Prakash Hari, Shah Nassem
Department of Dental Surgery, All India Institute of Medical Sciences, New Delhi-110029, India.
Indian J Dent Res. 2003 Oct-Dec;14(4):264-78.
Recently available Ceromer resin materials are promising for fabrication of esthetic anterior laminates and provices an alternative, cost effective treament modality to porcelain laminates for discolored anterior anterior teeth. It was proposed to study the esthetic quality and surface finish of veneers fbricated from ceromer resin and compare it with the standard porcelain veneers, both clinically as well as by scanning electron microscope (SEM) at baseline and at 12 months. If found comparable, ceromer resin veneer could provide an alternative to porcelain veneers which is an expensive technique for a developing country like India.
Seventy-two veneers, 36 porcelain and 36 ceromer were placed in 12 subjects who were studied at 0, 6 and 12 months for clinical acceptability, and at 0 and 12 months for SEM assessment. The restorations were luted with Opal luting composite and Scotchbond multipurpose system; polyvinyl siloxane was used as the impression material. The clinical assessment was made using modified United Public Health Services criteria, whereas the SEM assessment was made by quantitative analysis of the marginal fit and surface characteristics of the two veneering materials.
Ceromer exhibited good anatomical form during the study period, but depicted changes in color, surface appearance, marginal adaptation, increased marginal discoloration, and tissue response. Inability to achieve a good finish with high gloss was a major drawback of the ceromer. Porcelain exhibited better esthetics, marginal adaptation, finish qualities, and tissue response. The SEM showed good to excellent marginal fit at baselinne in ceromer and porcelain veneers, but loss of luting resin at the margins was evident in both the materials after 12 months, leading to visible gaps in a number of veneer restorations. Ceromer veneers exhibited poor surface characteristics in several restorations, which further degraded in an oral conditions over 12 months.
Veneering is an effective mode of treating discolored teeth. Ceromer veneers exhibited deterioration of surface finish and increased marginal discolouration over a period of 12 months. Clinically ceromer veneers were less acceptable to the patients than porcelain veneers. Porcelain out-scored ceromer as a permanent mode of treatment for discolored teeth, as over a period of 12 months it yielded good clinical results in comparison to ceromer.
最近可得的Ceromer树脂材料有望用于制作美观的前牙贴面，为变色前牙提供了一种替代烤瓷贴面的、具有成本效益的治疗方式。本研究旨在探讨用Ceromer树脂制作的贴面的美观质量和表面光洁度，并在临床以及通过扫描电子显微镜（SEM）在基线和12个月时将其与标准烤瓷贴面进行比较。如果发现两者具有可比性，Ceromer树脂贴面可为烤瓷贴面提供一种替代方案，对于像印度这样的发展中国家来说，烤瓷贴面技术成本高昂。
72颗贴面，36颗烤瓷贴面和36颗Ceromer树脂贴面，被放置在12名受试者口中，在0、6和12个月时对其临床可接受性进行研究，并在0和12个月时进行SEM评估。修复体用Opal粘结复合树脂和Scotchbond多功能系统粘结；采用聚乙烯基硅氧烷作为印模材料。临床评估采用改良的美国公共卫生服务标准，而SEM评估则通过对两种贴面材料的边缘适合性和表面特征进行定量分析来进行。
在研究期间，Ceromer树脂贴面呈现出良好的外形，但在颜色、表面外观、边缘适应性、边缘变色增加以及组织反应方面出现了变化。无法获得具有高光泽度的良好光洁度是Ceromer树脂的一个主要缺点。烤瓷贴面在美观、边缘适应性、光洁度质量和组织反应方面表现更好。SEM显示，Ceromer树脂贴面和烤瓷贴面在基线时边缘适合性良好至优秀，但12个月后两种材料在边缘处均明显出现粘结树脂流失情况，导致许多贴面修复体出现可见间隙。在一些修复体中，Ceromer树脂贴面表现出较差的表面特征，在12个月的口腔环境中进一步恶化。
贴面修复是治疗变色牙的一种有效方式。Ceromer树脂贴面在12个月期间表面光洁度变差，边缘变色增加。临床上，患者对Ceromer树脂贴面的接受程度低于烤瓷贴面。作为治疗变色牙的一种永久性方式，烤瓷贴面优于Ceromer树脂贴面，因为在12个月的时间里与Ceromer树脂贴面相比，它产生了良好的临床效果。
