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Although a well-known complication of dental treatment, cervicofacial subcutaneous emphysema is uncommon, especially with co-existing pneumomediastinum. This complication is usually attributed to high-speed air-driven handpieces or air-water syringes. Pneumomediastinum is usually self-limiting but potentially life threatening. We present two cases where both patients suffered from cervicofacial subcutaneous emphysema, one additionally having pneumomediastinum following routine restorative dentistry.