The fabrication of complete dentures has undergone significant transformation with the advent of digital technologies. Computer-aided design and computer-aided manufacturing (CAD/CAM) offers a promising alternative to traditional methods, boasting potential improvements in accuracy, efficiency, and patient satisfaction. This review synthesizes current literature to assess the efficacy of CAD/CAM systems in complete denture fabrication, exploring their advantages, limitations, and the overall impact on clinical practice and patient outcomes. While initial costs and the learning curve present challenges, the evidence suggests CAD/CAM technology is poised to revolutionize complete denture prosthetics by enhancing precision and streamlining the workflow.
One of the primary advantages highlighted in numerous studies is the enhanced accuracy afforded by CAD/CAM systems. Traditional denture fabrication relies on manual techniques, which are inherently susceptible to human error at multiple stages, from impression taking to waxing and processing. Digital impressions, captured via intraoral scanners, provide a highly precise and repeatable representation of the patient's oral anatomy. Research by Sailer et al. (2018) demonstrated that digital impressions offer superior dimensional accuracy compared to conventional methods, particularly in edentulous arches where tissue distortion is a concern. This improved accuracy in capturing the intaglio surface and border molding translates to a better fitting denture base, reducing the need for adjustments and relining procedures. Furthermore, the digital design process allows for precise control over occlusal schemes and tooth placement, leading to more stable and functional prostheses. For instance, a comparative study by Quaranta et al. (2020) found that CAD/CAM dentures exhibited superior fit and reduced occlusal discrepancies when compared to dentures fabricated using conventional techniques.
Beyond accuracy, CAD/CAM technology offers considerable efficiency gains. The entire workflow, from scanning to milling or printing, can be significantly faster than the multi-appointment, multi-step process of conventional denture construction. This reduction in chair time and laboratory processing is particularly beneficial for patients who require prompt replacement of lost dentition or who have difficulty attending multiple appointments. The digital workflow centralizes the design and manufacturing processes, minimizing the potential for errors introduced by multiple technicians or disparate laboratory steps. A systematic review by Papaspyridakos et al. (2021) indicated that while initial setup time might be longer due to software familiarization, the overall chairside and laboratory time is reduced, leading to potential cost savings in the long run. This efficiency can also alleviate the burden on dental laboratories, allowing them to handle a higher volume of work with greater consistency.
Despite these advantages, the adoption of CAD/CAM in complete denture fabrication is not without its challenges. The initial investment in scanning equipment, design software, and milling or printing machines can be substantial, posing a barrier for smaller practices or individual practitioners. Moreover, a significant learning curve is associated with mastering the digital design software and understanding the nuances of digital workflow protocols. Training and education are therefore crucial for successful implementation. Another area of ongoing research concerns the material properties of milled or printed denture bases and teeth. While materials like PMMA resins are commonly used, their long-term wear resistance and biocompatibility require continued investigation compared to conventionally processed acrylic resins. Studies are exploring novel materials and processing techniques to ensure the durability and safety of CAD/CAM-fabricated dentures.
In conclusion, the literature strongly suggests that CAD/CAM technology represents a significant advancement in the field of complete denture prosthetics. The documented improvements in accuracy, efficiency, and potential for enhanced patient comfort and satisfaction underscore its transformative capabilities. While the financial investment and the need for specialized training are valid considerations, these challenges are increasingly being offset by the demonstrable benefits of digital fabrication. As the technology matures and material science advances, CAD/CAM is likely to become the standard of care for complete denture fabrication, offering a more predictable, precise, and patient-centric approach to restoring oral function and aesthetics.