Intraoral Scanners: The Difference Between Digital and Traditional Dental Impressions in Dentistry and Dental Technology Introduction The fields of dentistry and dental technology have undergone significant technological advancement in recent years, driven by the adoption of modern digital systems for recording anatomical data, as well as designing and manufacturing dental prostheses. The intraoral scanner stands out as a key technology that has transformed both clinical and laboratory procedures, enabling a shift from traditional methods—which rely on physical impression materials—to the creation of 3D digital records of teeth and surrounding oral tissues. This evolution has enhanced operational efficiency and improved the precision of information exchange between the dentist and the dental technician. I. Concept and Mechanism of the Intraoral Scanner An intraoral scanner is an electronic device that utilizes optical imaging technology to capture the details of dental surfaces and oral tissues, converting them into a 3D digital model. The captured data is processed via specialized software, allowing the clinician to view the model in real-time, verify the completeness of the scan, and—if necessary—rescan any areas that were not captured clearly. These digital files are then transmitted to a dental laboratory, where they can be used to design crowns, bridges, ceramic veneers, and implant-supported restorations through Computer-Aided Design and Computer-Aided Manufacturing (CAD/CAM) software. This integration bridges clinical procedures with laboratory workflows, creating a seamless, fully digital ecosystem. Second: Conventional Impressions and Their Characteristics Conventional impressions rely on the use of specific materials—such as alginate or addition-cured silicone—to capture the shape of the teeth and surrounding tissues. These materials are placed into appropriate impression trays and left to set. Once hardened, the impression is sent to a dental laboratory, where it is used to create a gypsum (plaster) model, which serves as the basis for fabricating dental restorations. Although this method has been used for many years and remains effective in numerous clinical scenarios, it is susceptible to certain limitations. These include potential distortion during the removal or transport of the impression, dimensional changes in the impression materials, and errors that may occur during the fabrication of the gypsum models. Furthermore, some impression materials can cause patient discomfort, particularly in individuals with a strong gag reflex. Third: Differences Between Digital and Conventional Impressions The fundamental difference between the two methods lies in the mechanism used to record information and transmit it to the laboratory. Conventional impressions involve a physical recording of the teeth and tissues using impression materials, whereas digital impressions rely on the optical collection of data, which is then converted into electronic files that can be processed and modified. Digital impressions offer the advantage of immediate visualization of the results. If any areas are incomplete, they can be rescanned without the need to repeat the entire impression process. Additionally, digital files are easy to store and share electronically. This approach can also help reduce the time required for certain clinical procedures and enhance patient comfort. Conversely, scanning technology requires specialized equipment and practical training. Its accuracy can be affected by factors such as humidity, saliva, blood, and the difficulty of accessing certain anatomical areas. Furthermore, the scanning process can become more challenging in cases involving extensive areas or when capturing mobile soft tissues. Traditional impressions, meanwhile, remain an effective option—provided the appropriate material is selected and the correct technique is applied—especially in cases that require the capture of details not easily obtained through digital means. Fourth: The Role of Scanners in the Evolution of Dental Technology Digital scanning technology has brought about a paradigm shift within dental laboratories by streamlining the receipt of clinical data and the design of restorations using specialized software, such as Exocad. Its integration with milling machines and 3D printers has also transformed the fabrication methods for crowns, bridges, and various other restorations, while reducing reliance on certain traditional manual processes. This evolution underscores the importance for dental technicians to possess advanced digital skills—alongside a thorough understanding of dental materials, their properties, and fabrication techniques—to ensure that technical precision aligns with the functional and aesthetic requirements of the final restoration. Conclusion The intraoral scanner serves as a cornerstone of the digital transformation in dentistry and dental technology, offering advanced capabilities for recording, processing, and transmitting data. Nevertheless, digital and traditional impressions are not necessarily mutually exclusive; rather, each can be employed based on the specific requirements of the clinical case and the available resources. Selecting the right technology—alongside the proficiency of the dentist and the dental technician—remains a fundamental factor in achieving precise and effective treatment outcomes.