There are many advantages to using the argon laser as a curing device in restorative dentistry. The right amount of light energy at the right wavelength is certain. Only one-fourth of the time is needed compared to VLC devices, a great advantage in the often stressful circumstances of private practices. Furthermore, due to better management of polymerization shrinkage with better marginal adaptations, better adhesion to the cavity walls and less microleakage results. Because of better physical properties, with a higher degree of conversion and less water absorption, there is better wear-resistance and less postoperative sensitivity. Due to a decrease in acid solubility and an increased caries resistance at the most critical point—the margin between filling and tooth structure—we obtain superior clinical results.