The injection moulding technique (IMT) offers a minimally invasive approach for restorative dentistry by allowing thin, flowable composite material to be applied into a stable, transparent silicone index that serves as a customized mould. The composite’s fluidity ensures complete adaptation to the mould and intimate integration with the tooth surface, often avoiding the need for any enamel preparation and maintaining tooth integrity. The technique employs a conventional etch-and-rinse protocol and is reproducible across cases. IMT is particularly advantageous following orthodontic treatment, where small adjustments in tooth shape or alignment are necessary to achieve optimal aesthetics and function. Combining restorative procedures with orthodontic care is essential for predictable, long-lasting results, especially in interdisciplinary cases. This retrospective study reports on two pediatric patients (12.6 and 12.3 years old) who received conservative restorations of maxillary lateral incisors using IMT, both before and after orthodontic treatment. The procedure served as a temporary solution until the patients could receive definitive all-ceramic veneers.
The IMT was effective for correcting minor diastemas, small interdental gaps, and slightly retruded teeth. In cases with irregular tooth sizes or morphologies, this additive approach allowed precise adaptation without invasive tooth preparation. The technique provided a practical solution for improving tooth form and alignment in a minimally invasive manner. IMT is a valuable tool for pediatric orthodontic patients at both the initiation and completion of treatment. It assists clinicians in addressing tooth size discrepancies and shape anomalies while integrating seamlessly with orthodontic finishing. The combination of IMT with a digital workflow enables same-appointment delivery of thermo-printed retainers, reducing treatment time and improving clinical efficiency. Overall, this method enhances both functional and aesthetic outcomes in integrated orthodontic–restorative treatment.
