An effective method for spreading flowable composites in resin-based restorations

Cavity lining with flowable composites has been suggested for better marginal adaptation and a reduction in interfacial stress and post-operative sensitivity. The following in vitro study compares the spreading of flowable composite that lines the inner wall of a test cavity using an explorer and a specially designed smooth, oscillating, off-center rotating bur spun at 300 to 600 rpm. Two commercial flowable materials were used in this study. With use of the rotating bur, a more consistent, uniform cavity lining was achieved. This was not possible using the dental explorer. The specially designed rotating bur provides an effective way for clinicians to form a uniform cavity lining.