KeySplint Soft resin

In 2018 KeyStone Industries launched the KeyPrint line of 3D printing materials and ever since then numerous high quality KeyPrint dental resins have entered the market. One of those materials is the KeySplint Soft resin intended for the 3D printing of flexible nightguards, mouthguards, splints, repositioners and bleaching trays that combine the strength needed to protect teeth against disorders like bruxism with added flexibility for better patient comfort. It guarantees a faster turnaround and easy replacement, it can be warmed in water for easy placement and minimal chairside adjustments, and it only requires a simple cleaning procedure on the patient’s part (consult Care Guide document in Downloads Section).

Video 1: Introducing the KeySplint Soft resin. Source: KeyPrint.

Like all KeyPrint dental resins, the KeySplint Soft resin is fully biocompatible (cytotoxicity, irritation and sensitization) with 3 years of guaranteed shelf life, color stability and validation for multiple open-source printers thanks to its wide range of compatible wavelengths (385-405 nm). Some examples of compatible resin 3D printers are the UniZ Slash 2 and Phrozen Sonic XL 4K 2022, and a full list of validated equipment is available in the Downloads section. The KeySplint Soft resin is BPA, MMA and phthalate free, FDA cleared in the USA (510K), health licensed in Canada, and CE marked (class IIa).

Image 1: A batch of splints 3D printed with the KeySplint Soft resin. Source: KeyPrint.

Similarly to the KeySplint Hard resin, the KeySplint Soft resin is tough and durable enough to withstand the damage caused by bruxism, and it demonstrates tremendous abrasion and fracture resistance. Unlike the Hard version of this resin, KeySplint soft remains flexible with elastic memory, which allows the splint or guard to adjust well to the patient’s teeth and guarantees comfort with prolonged use. A study on the wear of the KeySplint Soft resin can be found in the Downloads section.

Image 2: A splint before and after polishing with the KeyPolish kit. Source: KeyPrint.

A common practice aimed at improving the surface finish of splints and guards is polishing. The edges and occlusal surfaces of splints 3D printed with the KeySplint Soft resin can be polished with the help of the KeyPolish polishing kit. Polishing the intaglio surface is not recommended as it can adversely impact the fit of the printed device. A complete polishing guide for this resin can be found in the Downloads section and a tutorial video is available in the Usage Tips section.

The KeySplint Soft precision dental resin by KeyPrint is the result of over a hundred years of experience that KeyStone Industries has accumulated in the polymer and dental sector. The KeySplint Soft resin produces biocompatible and reliable orthodontic devices that help many end users minimize the devastating effects of bruxism and guarantee ease of use for both the patient and the orthodontic specialist thanks to their flexibility and compatibility with many 3D printing and post-processing workflows.