This comprehensive review explores the current state and recent advancements in 3D printing technology, particularly focusing on vat photopolymerization (VP) in dental practice. The article provides an overview of the fundamental principles of 3D printing, emphasizing SLA, DLP, and LCD (or mSLA) technologies. It discusses the advantages, disadvantages, and shortcomings of these technologies, highlighting the importance of post-processing steps such as postraining and postcuring to ensure the biocompatibility of custom-made medical devices. The article also addresses legal considerations and regulatory obligations related to the production of custom medical devices through 3D printing. The review serves as a valuable resource for dental practitioners, researchers, and healthcare professionals interested in applying this innovative technology in clinical practice. Key topics include the fundamental principles of VP 3D printing, the three main technologies (SLA, DLP, and LCD), their advantages and disadvantages, and the importance of post-processing steps. The article concludes by discussing the legislative and ethical considerations surrounding the use of 3D printing in dentistry, emphasizing the need for caution and adherence to regulatory guidelines.This comprehensive review explores the current state and recent advancements in 3D printing technology, particularly focusing on vat photopolymerization (VP) in dental practice. The article provides an overview of the fundamental principles of 3D printing, emphasizing SLA, DLP, and LCD (or mSLA) technologies. It discusses the advantages, disadvantages, and shortcomings of these technologies, highlighting the importance of post-processing steps such as postraining and postcuring to ensure the biocompatibility of custom-made medical devices. The article also addresses legal considerations and regulatory obligations related to the production of custom medical devices through 3D printing. The review serves as a valuable resource for dental practitioners, researchers, and healthcare professionals interested in applying this innovative technology in clinical practice. Key topics include the fundamental principles of VP 3D printing, the three main technologies (SLA, DLP, and LCD), their advantages and disadvantages, and the importance of post-processing steps. The article concludes by discussing the legislative and ethical considerations surrounding the use of 3D printing in dentistry, emphasizing the need for caution and adherence to regulatory guidelines.