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Crown Workflow: Veneers - Minimal Prep

The following workflow outlines the steps involved in minimal-prep veneers.

Overview

The minimal preparation technique is employed to address a variety of esthetic concerns, such as deficient interdental papillae, misaligned teeth requiring “instant orthodontics,” and the closure of diastemas. This preparation style is particularly well-suited for teeth that require more significant alignment corrections, often referred to as “instant orthodontics.” It is also ideal for cases involving the closure of diastemas exceeding 1mm in width, especially when multiple diastemas are present.

Furthermore, minimal prep veneers can effectively achieve shade changes of up to three steps in chroma or value, such as transitioning from an A4 to an A1 shade. For even greater shade correction, the use of spacious ingots or opaque layers can be incorporated into the fabrication of feldspathic veneers.

Prerequisites

  • Teeth are no more than 3 color shift in shade than desired result

  • Any necessary major ortho is already complete - some medium misalignment is acceptable

     

Technology & Materials

  • IOS scanner or PVS impression material
  • Stock impression tray
  • Adjustment burs/drills
  • Bonding agents
  • Resin-based cement of choice
  • Optional: Reduction guide

 
Workflow Steps for Veneers - Minimal Prep 

Step Instructions Image
1.

Begin with an in-depth patient consultation to discuss goals, expectations, and desired changes in tooth color and contour.

It’s important to manage patient expectations, contrasting real procedures with quick TV makeovers, emphasizing the importance of doing things the right way rather than the quick way.

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2.

Take the following photos with the patient standing up:

  • Full-face full-smile

  • Full-face retracted smile

  • Optional: Full-face profile

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3.

Select appropriate veneer material and determine final shade specifications. Capture color photographs with shade tabs and include stump shade references for best results.

 3

Important: Stump shades are critical for proper veneer fabrication, as any discrepancy between the stump shade and desired veneer shade can cause inaccurate shade matching.
4.

Capture upper and lower impressions and bite. You may either:

  • Capture IOS scan of upper, lower, and bite, OR

  • Capture physical impression and bite

     

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5.

Send your records to ROE and complete the Rx via www.roedentallab.com/upload. If using IOS, you may submit your scans via the IOS portal, OR export your .STLs and upload to the ROE portal.

5

 
6.

Create and present a diagnostic proposal based on collected records, producing a physical printed model that demonstrates the final contour and anticipated results for patient approval.

6

 
7. Optional: You may utilize a reduction guide for precise preparation, ensuring optimal thickness and fit for the final restorations. 7

 
8.

Prep the veneers to the recommended specifications below:

  • Facial: 0.8 - 1.0 mm
  • Margin: 0.3 mm chamfer margin at or slightly subgingival

  • Incisal edge: 1.0 - 2.0 mm, 90° butt joint is preferred

  • Extend prep into the interproximal, halfway through the contacts

  • The incisal facial plane must be prepped slightly retroclined

  • Interproximal “dog leg”/elbow

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Important: To ensure the ceramic restoration looks natural and the margins are concealed, position the proximal margin more towards the lingual aspect of the tooth. Specifically, place the portion of the proximal margin that lies between the contact area and the gingival papilla even further lingually.

This preparation design is particularly effective when there is a significant shade change in the restorations, as it helps to hide the margin when viewed from an angle. To verify that the margin is sufficiently hidden, examine it from a 45° angle.
9.

Clean the prepped teeth using a proxy paste.

 9

 
10.

Proceed with temporization to allow patients to evaluate phonetics and function, making any necessary adjustments based on their feedback. Ensure the veneers have a passive fit.

 10

Important: Pay special attention to lower veneers during the temporary phase, carefully assessing interference and wear patterns while making adjustments based on patient feedback regarding bite comfort and smile esthetics.
11.

Optional: If significant changes occur from the initial diagnostic stage, take new scans or impressions to ensure accurate final results and documenting with additional photographs as needed.

Obtain final approval from both doctor and patient regarding function and esthetics before proceeding with permanent veneer placement.

 5
12.

Etch the prepared teeth and prepare the veneers for cementation using a hydrofluoric acid etch and silane coupling agent.

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13.

Apply bonding agent to the etched prepared teeth, but do not cure.

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14.

Cement the final veneers to the prepared teeth using your choice of resin. Cure according to the manufacturer’s recommendations.

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15.

Clean off excess cement and polish to completion.

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