Jackson R D
American Academy of Cosmetic Dentistry, Madison, Wisconsin; Diplomate, American Board of Aesthetic Dentistry, Columbus, Ohio; Private Practice, Middleburg, Virginia, USA.
Br Dent J. 2016 Nov 18;221(10):623-631. doi: 10.1038/sj.bdj.2016.856.
Composite resin continues to displace amalgam as the preferred direct restorative material in developed countries. Even though composite materials have evolved to include nanoparticles with high physical properties and low shrinkage stress, dentists have been challenged to efficiently create quality, long lasting, predictable restorations. Unlike amalgam, composite resin cannot be condensed making the establishment of a predictable, proper contact more difficult. In addition, composite requires an understanding of adhesives and an appreciation for their exacting application. These facts combined with the precise adaptation and light-curing of multiple layers makes placement of quality Class II composite restorations tedious and time-consuming. For private practicing dentists, it can also have an effect on economic productivity. Clinicians have always wanted an easier, efficient placement technique for posterior composite restorations that rivals that for amalgam. It appears that advances in instrumentation, materials and technology have finally delivered it.
在发达国家，复合树脂作为首选的直接修复材料，正持续取代汞合金。尽管复合材料已经发展到包含具有高物理性能和低收缩应力的纳米颗粒，但牙医们在高效制作高质量、持久、可预测的修复体方面仍面临挑战。与汞合金不同，复合树脂无法压实，这使得建立可预测的、合适的接触更加困难。此外，复合树脂需要了解粘合剂并重视其严格的应用。这些因素加上多层材料的精确适配和光固化，使得高质量II类复合树脂修复体的放置既繁琐又耗时。对于私人执业牙医来说，这也会影响经济生产力。临床医生一直希望有一种更简便、高效的后牙复合树脂修复体放置技术，能与汞合金修复体的放置技术相媲美。看来，器械、材料和技术的进步终于实现了这一目标。
