Bulk-fill composite resins have emerged as a key innovation in restorative dentistry, offering an efficient and modern alternative for direct dental restorations. These resins allow for the placement of thicker layers, reducing clinical time. Among their main features are their adaptability, adequate depth of polymerization, and mechanical properties, which meet clinical requirements for functional and durable restorations. The clinical benefits of bulk-fill resins include reduced polymerization shrinkage stress and simplified handling, making them particularly useful for deep cavity restorations. However, despite these advantages, controversies have arisen regarding their long-term performance, such as color stability and wear resistance in areas of high occlusal load. This article reviews the fundamental characteristics of bulk-fill resins, their clinical benefits, and the controversie...

Objetive: To compare the effectiveness of two filling pastes METAPEX ® and MCM chemotherapy paste in the treatment of primary molars with necrotic pulp. Methods: A controlled clinical trial with paired data was conducted in 29 six-year-old patients diagnosed with necrotic pulp in their mandibular first primary molars. The children were treated with two molars with necrotic pulp. Two study groups were established: Group A, molars filled with METAPEX, and Group B, molars filled with MCM antibiotic paste. The children received treatment with one technique per session and were subsequently restored with a glass ionomer restorative (Ketac Molar Eaxymix®). These were evaluated clinically and radiographically over time under certain parameters to determine their effectiveness. Results: When comparing the clinical and radiographic effectiveness between the METAPEX and MCM pulpectomy filling pa...

Objective: To compare in vitro the mechanical properties and depth of cure of bioactive bulk-fill resins versus bulk-fill composite resins. Materials and methods: An in vitro experimental study was conducted with 48 blocks of three types of resin. Each block received a load of 500 g for 30 seconds and was photopolymerized with a VALO® Cordless-Ultradent unit (1500 mW/cm2) for 4 seconds. Microhardness was evaluated using the Vickers hardness test, employing a calibrated LG® HV-1000 hardness tester. For statistical analysis, the Student's t-test and the non-parametric Kruskal-Wallis test were applied, considering statistical significance if p < 0.05. Results: The bioactive resin Beautifil® Bulk (BB) showed the highest microhardness, reaching a mean value of 55.1 VH (p < 0.01), followed by the resins Tetric® N-Ceram Bulk Fill (TNCBF) with 44.9 VH and Tetric® N-Flow Bulk Fill (TNF...