An overall greater surface area to wash and cure, potential build plate adhesion problems due to the smaller contact patch, and increased digital workflow complexity are three major pain points associated with this approach. In the end, delving deeper on the potential impacts of printing hollow models might give you a better picture and make you question the potential cost savings. If, however, it creates extra work and increases the number of steps for this therapy, then the cost savings must be significant to make up for it. If nothing functional is lost in the process of hollowing, then this intuition seems sound. And one tempting way to save resin is to print models that have been hollowed out. You may never have given much thought to whether your models should be hollow or solid, but saving resin means, at least in principle, saving money. For any new technology in a dental office, the emphasis should be on improving efficiency over previous methods and workflows. While this therapy has been one of the driving forces in the adoption of 3D printing in dental clinics, there is disagreement within the community on exactly how one should go about it. Creating models for the fabrication of clear retainers or aligners presents a rapid, high-value return on investment for dental 3D printing.
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