LIBRO BLANCO
Formlabs Logo

Printing splints with Dental LT Clear Resin

Printing splints with Dental LT Clear Resin

Aviso:

Para evitar dañar el equipo, comprueba la tabla de compatibilidad de los tanques de resina en Elección del material adecuado para confirmar que estás utilizando un tanque de resina compatible con este material.

Dental LT Clear Resin is a material for long-term biocompatible applications formulated for manufacturing dental splints. When printing these appliances, follow the application guide for the version you are using (V1 or V2).

Dental LT Clear V1

Note:

Formlabs has sunsetted Dental LT Clear V1, and it is no longer available for purchase. Consider Dental LT Clear V2 Resin or Dental LT Comfort Resin for applications requiring Class IIa long-term biocompatible parts.

Dental LT Clear V2

Dental LT Clear Resin prints at 100 microns.

Note:

To learn more about the performance or specific material properties of Dental LT Clear Resin, please refer to the Safety Data Sheet (SDS) and Technical Data Sheet (TDS). Always consult the SDS as the primary source of information to understand safety and handling of Formlabs materials.

Materiales necesarios

Made by Formlabs

Made by third parties

  • Dental design software (CAD)
  • Intraoral or desktop optical scanner
  • Ultrasonic bath

Resumen del proceso de trabajo

Notice:

This is an abbreviated version of the instructions in the application guide. Read the instructions for use and the application guide for detailed instructions about design, settings, and part orientation for the version of Dental LT Clear Resin you are using.

Escaneo

In order to 3D print a splint, use a scanner to collect anatomical data of the patient’s dentition. Either scan the patient directly with an intraoral scanner, or use a desktop optical scanner to scan a polyvinyl siloxane (PVS) impression or stone model.

Diseño

Use a dental CAD software package to process and design the splint before printing. Choose software that offers open STL/OBJ/3MF file export. The exact design steps vary for each software package, so contact the software provider for details on generating a splint from patient scans.

The basic steps to consider for 3D printing splints a Formlabs SLA printer:

  • Import and trim the scan
  • Define insertion and undercuts
  • Mark the margins and generate the splint
  • Generate a splint bar
  • Adapt the splint design
  • Make final adjustments
  • Export the digital model in STL/OBJ/3MF file format

Impresión

Install or update PreForm, then set up the next print job.

To prepare a model for printing in PreForm:

  1. Open a model.
  2. Select the resin, resin version, and the desired layer thickness.
  3. Orient to preserve fine details.
  4. Generate supports.
  5. Send the print job to the printer.
  6. Use the manipulator and Orientation tools to orient parts with the intaglio surfaces facing away from the build platform.
  1. Ensure that parts are oriented at an angle of 30° or less, measured relative to the build platform. Orienting parts upright or at angles more than 30° will compromise precision and lead to poorly fitting parts. The direction and angle settings ensure that parts will print reliably and that supports will not be generated on intaglio surfaces.
  2. When angling the model in PreForm, rotate the anterior portion upward and away from the build platform so that the posterior ends remain closer to the build platform.

Notice:

Printing at greater than 30° angles will result in poorly fitting splints. As the angle of inclination of the part increases above 30°, interproximal surfaces print less accurately.

  1. Generate supports using the auto-generation feature in PreForm. Inspect the part to ensure there are no support touchpoints on intaglio surfaces. Use the manual support editing feature to add or remove supports, if needed.
  2. Once all models are properly configured in PreForm, upload it to the printer.
  3. Insert a resin tank, resin cartridge, and build platform into the printer. Thoroughly agitate the resin cartridge before insertion, by shaking and rotating it several times.

Notice:

For full compliance and biocompatibility, Dental LT Clear Resin requires a dedicated resin tank, build platform, and finishing kit, which should only be used with other Formlabs resins for biocompatible applications, such as Dental SG Resin.

Acabado

The Form Wash agitates the solvent bath and removes parts from the bath after a set time. Wash parts according to the support article Form Wash time settings. Pay particular attention to information that affects mechanical properties or biocompatibility requirements.

Allow parts to air dry for at least 30 minutes or use compressed air to blow IPA away from part surfaces. Inspect the models closely to ensure all liquid resin has been removed.

Requisitos de poscurado

Post-cure parts to achieve biocompatibility and optimal mechanical properties. Refer to the support article Form Cure time and temperature settings for post-curing settings.

Aviso:

Realiza el poscurado siguiendo las recomendaciones de Formlabs para conseguir los mejores resultados posibles. Un poscurado inadecuado puede afectar a las propiedades mecánicas y de biocompatibilidad.

  • No poscures por encima de los ajustes recomendados, pues puede causar una decoloración de las piezas.
  • Permite que las férulas poscuradas se enfríen completamente antes de retirar los soportes o la sujeción.
  • Retira los soportes solo después del poscurado para evitar que las piezas se deformen.

Use the flush cutters included in the Finish Kit to carefully cut the supports at the points where they attach to the printed splint. Use caution when cutting the supports, as the post-cured material may be brittle. Supports can also be removed using other specialized tools, such as cutting disks or round cutting instruments like carbide burs.

Biocompatibilidad

Dental LT Clear Resin (V1) is a resin for Class IIa biocompatible applications that is in conformity with the essential requirements and provisions of the Council Directive 93/42/EEC concerning medical devices as amended by Directive 2007/47/EC, and is in conformity with the following standards:

  • EN ISO 1641:2009
  • EN-ISO 10993-1:2009/AC:2010
  • EN-ISO 10993-3:2009
  • EN-ISO 10993-5:2009
  • EN 908:2008

Dental LT Clear Resin (V2) has been evaluated in accordance with ISO 10993-1:2018, Biological evaluation of medical devices - Part 1: Evaluation and testing within a risk management process, and ISO 7405:2018, Dentistry - Evaluation of biocompatibility of medical devices used in dentistry, and passed the requirements for the following biocompatibility risks:

  • EN ISO 10993-5:2009
  • ISO 10993-10:2010/(R)2014
  • ISO 10993-10:2010/(R)2014
  • ISO 10993-11:2017
  • ISO 10993-3:2014

Recursos adicionales