35JANUARY/FEBRUARY SALE Z TO ORDER CALL: 1-800-496-9500

Shofu Vintage MP can be applied to all PFM alloys within a

CTE range of 13.6 to 15.2 x 10-6K-1 and can be effectively used

in a simple two-layer dentin-enamel technique. (Fig. 1 on

Palladium alloy, Fig. 2 on Captek). MP mimics the natural

diffused light reflection of dentin and enamel even in areas of

limited tooth reduction. Since base metal alloys (Cr-Co) can be

finished even thinner than other alloys it is possible to work

within a total prep reduction thickness of 1.0 – 1.2 mm.

Today there are newer beryllium and nickel-free Cr-Co alloys

such as Argeloy N.P. Special with a 280 Vickers hardness that

can be easily cast and finished. When oxidized for opaque

bonding, these alloys do not pose esthetic problems since the

extremely dense MP opaques maintain the value (brightness)

and chroma of the shade. The opaque layer has a fired thickness

of only 0.1 mm. (Fig. 3).

Throughout all of the firing programs used to fabricate PFMs,

shades are easily maintained and matched to the shade tab—

even with a bleached shade (Fig. 4). An initial wash opaque layer

with the unique Base Opaque increases the bonding strength. A

protective glass that covers the color pigments within the

porcelain helps to maintain chroma and translucency, even after

multiple firings.

To avoid the metal “black line” at the margin the standard MP

margin powders allow for optimal esthetics and fluorescence

even in severely limited space without any shadowing effect

(Fig. 5). For margins with extremely limited room, two special

masking margin powders are available.

The two main criteria for an accurate shade match are value and

contour. Assuming the contours are correct, a single-unit

restoration will blend in with the surrounding dentition as long

as the value is the same. The overall value of a basic two-powder

buildup can be modified with a wide range of standard opal

incisal powders, from number 55 to 60. MP is a versatile

porcelain system that can also be utilized in the fabrication of

porcelain inlays and onlays, as well as veneers and jacket crowns

(on platinum foil or refractory die material).

1) What available Vickers Hardness rating is desireable forease of handling? a) 50b) 110c) 280d) 490

2) How thin can the final fired MP opaque layer be? a) 0.1 mmb) 0.2 mmc) 0.25 mmd) 0.3 mm

3) What is the main advantage of using a porcelain margin on a PFM? a) Lower cost to the dentist.b) No black line at the margin.c) Better fit.d) Saves time.

4) What the two main criteria within a restoration for anaccurate match with its surrounding dentition? a) Chroma and hue.b) Mamelons and surface texture.c) Value and contour.d) Chroma and value.

5) In addition to fabricating PFM’s, what other types ofrestorations can be made with Shofu MP? a) Inlays, onlays, veneers, jacket crowns.b) Zirconia crowns.c) Denturesd) A fully adjustable or semi adjustable articulator

6) What are the foundation Art Stains used for? a) External staining.b) Staining zirconia copings and frames.c) Characterizing porcelain denture teeth.d) Mamelon effects.

7) What are the stains designated as AS, BS, CS, and DS are used for? a) Mamelon effects.b) Staining zirconia copings and frames.c) Intensifying chroma.d) Raising value.

8) What is the firing range for the correction powders in the MP system? a) 750 - 770 ºC.b) 600 - 650 ºC.c) 800 – 850 ºC.d) 770 – 800 ºC.

9) What is CPM Fine?a) One of the Art Stains.b) An opaquer material.c) An enamel modifier.d) A low-fusing correction material for porcelain margins.

CDT Contact Information

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Receive .5 point documented scientific credit for passing the above quiz about thisarticle. Return a completed quiz & contact information to Andrew Kissin via mail,fax, or E-mail at the following addresses: Zahn Dental, 135 Duryea Road, Melville,NY 11747–Fax to (631) 390-8179–e-mail to andrew.kissin@henryschein.com. This quiz has been provided by Shofu and approved by NBC (National Board forCertification). A copy of this quiz has also been posted on the Zahn Dental Website @ www.zahndental.com/quiz; click on CDT Quizzes.

Technical Article Quiz (Circle your answers)

Zahn D

ental • CD

T Q

uiz • January/February 2011

Shofu Vintage Art® stains, is a unique system of fluorescent colorants that

are packaged in jars as pre-mixed pastes with extremely fine particle size.

Art Stains can be applied internally and externally. For internal staining

techniques it is fired between 830-850ºC. There are four special foundation

Art Stains for each Vita Classic shade group A, B, C, and D that can be

applied directly to Zirconia frames to add chroma. Stains designated as AS,

BS, CS, and DS are used to intensify the chroma level within their

respective shade groups. Intricate effects can be applied externally at

850-870ºC to create characterizations that appear as though they are

internal (Fig 6). Examples are the two mamelon stains, ivory and pink.

Comparing the thick, creamy consistency of the Art Stains with powder

stains that are mixed with glaze liquid is analogous to comparing oil paints

to water colors. Art Sains are more intense in chroma than conventional

stains and they are used sparingly.

For making minor corrections after staining and glazing, there are three

correction powders that fire at only 750–770ºC. Add-On B (body), Add-

On T (translucent), and CPM Fine for margins. The extremely low-firing

temperatures of these materials allows for safe, repeated firings after

glazing and staining without any change in contour or shade (Fig. 7).

Polishing to a glazed finish is fast and easy due to the extremely

homogenous and dense surface.

In addition to the Standard Set and Margin Porcelain Set of powders,

MP also offers supplementary kits as a Whitening Set for bleached shades

and a Color Effects Set with cervical and gum shades.

A New Generation of PFM PorcelainJoe Weisz, CDT Joe Weisz, CDT

Figure 1:

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VITA MFT teeth bring esthetics into your production environment and feature a quick, simple and precise setup that can be used for all

occlusal concepts including partials, complete dentures, implants, attachments and temporary restorations. No other tooth can match

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Now in 5 new shades including bleached shades! (New shades include 3L1.5 (~C2), 4L1.5 (~C3), 5M1 (~C4) and Bleached Shades 0M1 and 0M3.)

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• One tooth for conventional or lingualized occlusion • True VITA shade match

• Hard, homogenous tooth, abrasion and craze resistant

• Concentrated and compact assortment for maximum

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© Vident 2010. *Teeth cards must be purchased on one invoice through Zahn Dental, dated January 3 – February 25, 2011. Invoice should be faxed to Vident marketing at 714.961.6209 for

~ Vita’s 3D shade is equivalent to the corresponding Classic Shade.

redemption. Offer subject to change without notice. Limit 1 free card per laboratory address. Promo code SFDENJF11.

The Standard in Shade Guides Takes the Lead in Restorations.

Buy any 3 cards of VITA MFT teeth and receive 1 VITA MFT card of new Bleached Shade OM1 or OM3 FREE!*

ZAHN SPECIAL OFFER!

For more information reference pages 472–476 inyour current Zahn Catalog, or contact your SalesConsultant at 1-800-496-9500.

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