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## Events & Articles
Stay up to date on the latest dental & SKDLA news.
**08**May
## 
Porcelain Veneers are often the preferred restorative choice for patients who are seeking very aesthetic anterior treatment. A successful case not only restores the treated teeth but often has the […]
These few must-follow guidelines can really make a world of difference in a patient’s smile. The goal is for the end-result to look as natural as possible, and utilizing these […]
The treatment of a patient that requires a full mouth rehabilitation should follow a carefully planned and executed workflow, both in the dental clinic and in the laboratory. At Spectrum […]
If you find yourself in a situation where a patient cannot be without their partial denture, but need to adapt the clasp and rest to the new crown you will […]
Before Numbing The Patient • Take impression for pre-op full arch study cast. • Take full-face and close-up smile photos with lips unretracted and teeth slightly apart to show the […]
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# Veneers Case Study
Porcelain Veneers are often the preferred restorative choice for patients who are seeking very aesthetic anterior treatment. A successful case not only restores the treated teeth but often has the added benefit of restoring a smile and the patient’s self-confidence.
Since we are making all-ceramic restorations every day, we are able to share some tips and information that will help ensure successful results for your patients. The following information covers a variety of subjects from basic to advanced. All are very important for the ultimate success of an all-ceramic restoration, however, some of the suggestions may not necessarily apply to you.
**Models**
Pre-op, post-op, diagnostic wax-ups, and/or acrylic mock-ups are all helpful in communicating proper incisal edge position, contour, and basic morphology. Providing models with this essential information will ensure that we meet the patient’s expectations. Allow us to create beautiful diagnostic wax-ups to present to your patient along with a putty matrix for temps fabrication.
**Veneer Preparations**
**LABIAL VENEER**
**COLOR AND PREP DEPTH**
Provide a shallow chamfer margin at the gingival (A), and proximal margins. The prep depth (B) should be 0.75 – 1.0 mm to provide space to block out tooth color that is too dark or too light. If the stump shade (prep) matches the desired restoration color, then only 0.5 mm reduction is needed. Provide 1.5 mm incisal reduction (C).
**DIASTEMA CLOSURE**
Increased proximal preparation (A) allows proper contour. Preparation (B) does not permit proper transitional contour after closure of diastema.
**Preparation Design**
DEPTH – Dark stump shades require deeper preparation (0.75-1.0 mm) to enable the ceramist to build the first layer of blocking porcelain (opaceous dentin) and still have enough room for the surface layers of translucent porcelain. Preps with stump shades that closely match the desired finished restoration shade can be prepped more conservatively (0.5 mm).
MARGIN – Shallow chamfer margins enable us to provide the best results. Thin slices or bevels don’t hold up well to the mechanical etching (sandblasting) and chemical etching (hydrofluoric acid) processes required to fabricate this type of restoration.
**Bonding**
As a word of caution, check material expiration dates carefully; use only fresh bonding materials. Debonding, breakage, and discoloration are often traceable to old silane primer and occasionally to out-of-date bonding resins. A recurring debond problem is usually caused by a contaminated tooth interface. Pumice and re-etch should solve this problem.
**Communicate Shade**
Provide photos before and after preparation. Select the shade tabs that match the pre-op tooth and post-op preps (stump shade). Position the shade tabs so that they are visible in the photo with the tooth and/or prep. Nothing communicates shade and characterizations better than photographs.
## Another Story
08/05/2023
Porcelain Veneers are often the preferred restorative choice for patients who are seeking very…
These few must-follow guidelines can really make a world of difference in a patient’s…
The treatment of a patient that requires a full mouth rehabilitation should follow a…
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# Shade Accuracy Guidelines for Restoration
These few must-follow guidelines can really make a world of difference in a patient’s smile. The goal is for the end-result to look as natural as possible, and utilizing these methods is a great way to avoid undesired results.
**Bleaching Patients**
If a patient has been bleaching, then schedule the final shade appointment **at least** two weeks after the last bleaching treatment. The reason for this is that teeth may be cloudy-white for a time after bleaching, and become more translucent after two weeks. Understandably, these changes could have an undesirable effect on the final shade match of the restoration. Additionally, when a drastic color change is noticed after bleaching, the color of the teeth can rebound slightly, back to the original shade.
Two weeks may not be enough time for those patients experiencing drastic color changes from heavy bleaching. It is important that the shade of the teeth be stable for the final shade appointment to ensure the best color and aesthetic result for the dental restoration.
**Bright Colors Affect Shade**
It is imperative to eliminate sources of reflected, colored light. A patient will always need to remove lipstick before a shade is taken. Neither patient nor personnel in the shade-taking area should be wearing bright-colored clothing. If a patient is wearing colored clothing, you can cover it with a light blue sheet or smock. Make sure there are no other bright colors in the proximity of the shade-taking area. Also, bright-colored walls or furniture will reflect colored light and affect the accuracy of your shade and/or photograph.
**Hydrate Teeth**
Teeth **must** be hydrated to match the shade. It is best to take the tooth shade before preparation. After preparation, shades can be adversely affected by tooth dehydration. To understand hydration and its effects on shade matching, you must understand that the dentin layer is primarily responsible for the chroma of a patient’s natural tooth. Since the layer of enamel varies the appearance of the chromatic dentin layer through the scattering of light—if the light is more scattered, the enamel appears more translucent. If light scattering is reduced, the enamel appears more opaque, resulting in the chromatic layer of dentin being masked.
**Shade Tab System**
We have found this system offers a precise evaluation of shade. It provides a systematic arrangement of virtually all existing tooth shades, including bleached shades. Selecting a shade with the  is a 3-step process of making simplified choices of value first, then chroma, and finally, hue.