Cerec Procedure

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Introduction:

This clinical procedure outlines the step-by-step process for fabricating a CEREC e.max crown, from digital scanning to final cementation using 3M Ultimate Cement. CEREC technology combined with e.max material offers patients durable and aesthetic restorations with efficient chairside fabrication. These restorations are of an equal quality to those which you get from the lab but avoid the use of a temporary. We will often still send to the lab for anterior cosmetic crowns to give the artists their the ability to make something truly special.

  1. Digital Scanning and Design:

a. Prepare the Tooth: Begin by preparing the tooth according to standard crown preparation guidelines, ensuring adequate reduction for crown retention and esthetics.

b. Intraoral Scanning: Utilize a CEREC intraoral scanner to capture digital impressions of the prepared tooth and surrounding dentition, ensuring precise data acquisition.

c. CAD/CAM Design: Design the e.max crown using CAD software, considering factors such as occlusal harmony, marginal fit, and aesthetic appearance.

2. Milling and Sintering:

  • Material Selection: Choose e.max lithium disilicate blocks compatible with the CEREC milling unit, selecting the appropriate shade to match the patient’s dentition.
  • Milling Process: Transfer the digital design to the milling unit and initiate the milling process, ensuring accurate fabrication of the e.max crown.

3. Finishing and Glazing:

  • Marginal Adaptation: Inspect the milled e.max crown for marginal fit and surface irregularities, making any necessary adjustments using fine-grit finishing burs.
  • Polishing: Polish the e.max crown to a smooth surface finish using polishing discs and rubber wheels, ensuring optimal esthetics and patient comfort. (if needed)
  • Glazing: Apply a thin layer of glaze to the surface of the e.max crown using a brush or applicator, followed by careful firing in the porcelain furnace to enhance the crown’s optical properties and surface luster.

4. Cement the crown according to the cementation protocols in place.

 

5. Post-Cementation Instructions:

  • Oral Hygiene: Instruct the patient to maintain proper oral hygiene practices, including regular brushing, flossing, and dental visits.
  • Avoidance of Hard Foods: Advise the patient to avoid biting on hard or sticky foods immediately after crown placement to prevent dislodgement or fracture.
  • Follow-Up: Schedule a follow-up appointment to evaluate the e.max crown for stability, occlusal function, and patient satisfaction.

Conclusion:

The CEREC e.max crown fabrication and cementation process enables efficient chairside restoration with excellent esthetics and longevity. By following this comprehensive clinical procedure, practitioners can achieve predictable outcomes and ensure patient satisfaction with their e.max crown restoration.