Small B W
Gen Dent. 2001 Sep-Oct;49(5):457-60.
Composite resin shrinks up to 5% by volume upon curing. This shrinkage and the associated contraction stress remain the two most significant clinical problems with curing resin composite restorations. Many patients continue to experience sensitivity following placement of direct composites and seating of indirect restorations utilizing resin cements. Unfortunately, some claims made by manufacturers or certain clinicians that promise to alleviate these problems are made from a marketing standpoint, with no refereed literature to support those claims. Even within the literature, contradictory results have been reported, perpetuating the confusion. It is of utmost importance that all practicing dentists be aware of the various types of curing systems available and the advantages and disadvantages of each system. It is the opinion of the author that no existing system will alleviate every problem. Until new composite systems are perfected, such as the cyclopolymerizable resins and expanding polymers, we will continue to have shrinkage and stress. Be aware of false claims, read and interpret the literature, and, most importantly, do what is best for your patients.
复合树脂在固化时体积收缩可达5%。这种收缩以及相关的收缩应力仍然是树脂复合修复体固化过程中两个最显著的临床问题。许多患者在直接使用复合树脂补牙以及使用树脂粘结剂安置间接修复体后，仍会感到敏感。不幸的是，一些制造商或某些临床医生声称能缓解这些问题，这些说法是从营销角度出发的，并没有经过同行评审的文献来支持。即使在文献中，也有相互矛盾的结果报道，这使得困惑持续存在。所有执业牙医必须了解现有的各种固化系统以及每种系统的优缺点，这至关重要。作者认为，现有的任何系统都无法解决所有问题。在新型复合树脂系统（如可环聚合树脂和膨胀聚合物）完善之前，我们将继续面临收缩和应力问题。要警惕虚假宣传，阅读并解读文献，最重要的是，为你的患者做最有益的事。
