Guide for Using Shape X for Dental Casting and Pressing

Dental milling centers and laboratories have successfully employed casting and pressing methods for more than a decade to fabricate metal and ceramic components. However, the current solutions in the market often come with high costs and usability challenges. To overcome these hurdles, we have streamlines the process of casting and pressing dental crowns, bridges, and frames.

Required Hardware

• Shape X RP
• Shape X 3D Printer
• Shape X Wash/Dry
• Shape X Cure

• 3rd Party Dental Lab scanner for dental models or impression.
• 3rd Party Intraoral scanner for direct patient scan.

Required Software

• Shape X CAM

• 3rd Party Dental CAD software for designing restoration.

Required Materials

• Shape X Cast Resin.

• Isopropyl alcohol (IPA) ≥99% .
• Dental burnout oven.
• Investment ring or form.
• Investment material.
• Casting machine.
• Metal or ceramic ingots.

In order to design a dental prosthetic using dental CAD software, it is necessary to obtain a digital representation of the patient's anatomy. This can be accomplished by either directly scanning the patient's mouth using a 3D intraoral scanner or by scanning a physical impression or poured model using a desktop 3D scanner.

This application guide will provide an overview of two popular dental software options, namely 3Shape Dental System and ExoCAD, which are utilized for digitally designing dental crowns and restorations. It will outline the key parameters of each software.

REMOVABLE PARTIAL DENTURES

To enhance the uniformity and minimize deformation of 3D printed frame patterns, it is recommended to incorporate a stabilization bar with a diameter of 2.5 mm. This addition aims to increase consistency and reduce distortion.

When designing clasps with a thickness below 0.8 mm, it is advisable to connect the clip arms together to achieve the most accurate results. However, please ensure that the minimum thickness of any component is at least 0.5 mm.

Most dental design software typically generates a manufacturing file in the .stl format. To proceed, you need to find this file and transfer it to Shape X 3D Printer.

* Before Press "Print" button:

> Please ensure that the black screw of the build platform and the set of two screws that hold the resin container are securely tightened.

> Carefully inspect both the build platform and the resin container film to ensure there is no cured resin present.

> Ensure that the resin temperature falls within the recommended range of 25 to 35°C. Preheat the resin if necessary and mix it thoroughly with Shape X RP. Before use, clean the resin container with a filtration paper if it has been previously used. Additionally, ensure that the resin is not expired and that the quantity in the container is above the indicated minimum level.

4.1 Part Removal

To remove the printed parts from the build platform, utilize a scraping tool positioned beneath the part raft. By rotating the tool, gently separate the parts from the platform.

4.2 Washing

In a well-ventilated area and while wearing appropriate protective masks and gloves, submerge the printed parts in an isopropyl alcohol (IPA, ≥99%) solution within the Shape X Wash/Dry apparatus. Allow the parts to undergo a 3-minute washing cycle.

or submerge the printed parts in an isopropyl alcohol (IPA, ≥99%) solution within a black box. Allow the parts to undergo a 6-minute washing cycle.

4.2 Drying

Utilize compressed air to aid in the drying process of the parts, facilitating a quick inspection of unwashed resin remaining after using Shape X Wash/Dry machine.

4.3 Curing

1> While keeping the raft and supports intact, position the printed parts in the Shape X Cure device with the raft side facing downwards. Proceed to post-cure the parts for a duration of 10 seconds.

2> Remove Support structure and raft with cutting disc.

3> Clean Parts from white powder with IPA, then compressed air.

4> Position the printed parts in the Shape X Cure device. Proceed to post-cure the parts for a duration of 10 seconds.

5.1 > Investment

When working with Castable Wax Resin for casting purposes, it is important to use a high heat bonded phosphate investment. We recommend the use of BEGO Bellavest SH for the pressing and casting of crowns and bridges. For the casting of RPD (Removable Partial Denture) frames, Bego WiroFine is recommended.

It is crucial to always consult and follow the recommendations provided by the investment manufacturer.

5.2 > Burnout

>Place the material in the furnace and set the temperature to 550℃.

>Allow the temperature to increase from 550℃ to 950℃ over a period of one and a half hours (adjust the duration based on the power of the furnace).

>Once the desired temperature of 950℃ is reached, maintain it for half an hour.

After this holding period, the material is ready to be cast.

5.3 > Casting or Pressing Process

For metal alloy, we recommend using BEGO or Argen as reliable options. When it comes to ceramic pressing, the recommended choice is Ivoclar IPS e.max Press, known for its quality and performance.

To ensure a successful casting or pressing process, it is crucial to carefully follow the manufacturer's specifications, particularly when it comes to matching the preheating and casting or pressing temperature to the specific alloy being used.