Tray-Free Dental Thermoplastic Sheet For Temporaries Single Temporary Crown Bridge Base 50pcs/Box. Skip the Messy Impressions: The Simple Solution for Single & Few-Unit Temporary Crowns. Traditional impression methods are often overkill for single or few-tooth temporaries, leading to complexity, waste, and patient discomfort. Our revolutionary compact thermoplastic sheets are the answer. Tray-free, no mixing required—simply soften in warm water and shape directly by hand. This streamlines your workflow, saving time and enhancing patient comfort. FDA Certificated.