Introduction. Interdental contacts are an important factor to keep dento-alveolar system healthy. Its basic functions are protecting the underneath papilla and periodontal structures, prevention of carries and dispersal of masticatory forces. Studies show that distribution of dental caries is unequal, approximal surfaces being affected in up to 77%. Approximal caries may be difficult to diagnose and treat, even for an experienced dentist due to its hidden location. Diagnosing requires use of other methods than visual-tactile examination, such as: bitewing radiographs, fiberoptic-transilumination or fluorescent system like Saprolife. It is impossible to restore approximal surfaces with tight interdental contacts without using specially designed systems, like Palodent or Bioclear Biofit. This leads to an increased treatment time, especially when multiple teeth are affected.  Aim of study. To study the possibility of decreasing time necessary for restoring interdental contacts, using new materials and methods, preventing further complications.  Material and methods. In this study, 6 teeth (4 molars and 2 premolars) with approximal caries were divided into 2 groups. One group, consisting of 2 molars and 1 premolar, was treated with dental composite of low viscosity (Tetric N-ceram, Ivoclar) using “layered” technique. Another group was treated with bulk-fill composite of high viscosity (SDR, Dentsply) using “injection molding” technique. Total treatment time and approximal wall restoring was measured for every tooth of both groups. Post-op radiographs were taken.  Results. Due to increased polymerization depth of SDR composite (4 mm), fewer steps are required for core build up. As a result, total treatment time decreased on average by 4 minutes 50 seconds, along with wall restoring time decrease on average by 7 minutes 15 seconds, using “injection molding” technique. Post-op radiographs showed the presence of bubble in 1 tooth, restored by “layered” technique.  Conclusion. The “injection molding” technique requires fewer steps, less time, and reduces the possibility of further complication such as bubbles.