DTX (First-Generation) with lesion on the distal of the mandibular right first molar is suitable to practice for the class II in the ADEX exam. The only difference between first-generation and 2024 version is mainly cosmetic such as the color (white root vs orange) and a slightly softer pulp. Although the teeth in the actual ADEX exam will differ, they are designed with similar color and hardness. Compatible only with the ModuPRO One. CompeDont is a registered trademark of CDCA.