September/October 2012 Edition

Zahn Dental and TheFoundation for DentalLaboratory Technology ran a SPRING RAFFLE. The winnerswere selected at the Louisiana &Mississippi Dental LaboratoryAssociation’s Fun n’ Sun meetingon July 20th. With over 520 ticketssold, The Foundation receivedclose to $5,000 for this raffle.

The winners were:Handler Red Wing Lathe

Midway Dental Laboratory – Greensboro, NC

Vaniman Sandstorm2

Martines Dental Laboratory – Sterling Heights, MI

Kerr Ultra Waxer2

Biotech Prosthetics – Arlington Heights, IL

Henry Schein’s Maxima BrushlessMicromotor Handpiece System:

A & B Dental Arts – Tuscumbia, AL

A Special Thank You to our sponsors for donating

these products!

43SEPTEMBER/OCTOBER SALE Z TO ORDER CALL: 1-800-496-9500

There have been greater changes in dentistry in the past 10

years than in the previous 3 or 4 decades. Sometimes I wonder

how it’s possible to keep up. Patients have high expectations

for excellent results. There are higher numbers of dental

schools that don’t require students to learn denture techniques.

Aesthetic knowledge is a result of intense research to acquire

the rules of nature in restoring edentulous patients. The

application of this knowledge creates the illusion of pleasing

healthy smiles. As a result of many years of experience, there

are technicians that can look at a cast and determine what tooth

or mold is to be used. However, many of the basic rules are lost

as experienced technicians are maturing and retiring.

The teeth used and copied by most dental manufacturers were

carved by Dr. Leon Wilson and Dr. Gysi and released in 1912 in

Chicago. The molds were made with old technology for

ceramic teeth with holes or pins to retain them in vulcanite

denture bases. (Fig. 1). Today, there is an alternative solution

with a tooth system that restores a patients smile so it is

undetectable, to the observer. The patient appears to have a

healthy, pleasing smile, rather than one that begs, “what’s

wrong with the teeth?”

Heraeus’ Mondial i is not a copy of the most popular tooth

molds, but a representation modeled after real teeth, with true

form and dimensions to include a singlum on the lingual of

centrals and layered to look like their natural counterparts.

Mondial i has increased aesthetics, with delicate mamalon

structures and deep dentin, both of which can be modified by

recontouring, texturing, and polishing for higher chroma at the

gingival, or more translucency with pronounced mamalons on

the incisal. Mondial i is for implants, the teeth are resilient and

have a similar size to natural teeth, facilitating space for

retention screws, and it has improved form to mimic inter-

tooth relationships for a natural appearance when placed

together (Fig. 2). Heraeus Mondial 6i R6 with wax roots mimics

extracted teeth. Mondial teeth have been designed and layered

for those patients desiring a more conventional denture look,

but are made of the same advanced technology incorporated in

the acrylic (Fig. 3). (Nano Pearl technology in Mondial and

Mondial i).

There are rules for placement of teeth that can be applied to a

patient that has lost their natural teeth or a person that has

never had teeth. Dr. George Kirtley has treated an ectodermal

dysplasia patient born with only two deciduous cupids (Fig. 4).

This disorder can cause the hair, teeth, nails, and glands to

develop and function abnormally. Dr. Kirtley’s team extracted

the two teeth, did bone grafting procedures, and placed

implants to retain a denture on the maxilla (Fig. 5). The

mandible had no teeth and four implants with locators were

used (Fig. 6). The case was restored using normal over the

ridge techniques (Fig. 7). The decision was made to remake the

case to improve tooth placement and appearance. Final

impressions were taken. The bar served as impression posts

(Fig. 8). Base plates were made using cranial landmarks. The

placement of the centrals was critical and landmarks were used

to aid in initial location (Fig. 9: 8mm anterior to one-half of the

incisive papilla).

The anterior occlusal plane is 22mm from the buccal vestibule

and the posterior is 5 to 8mm measured from the hamular

notch. The mandibular occlusal plane is 18mm from the

vestibule in the anterior and two-thirds of the way up the

retromolar pad. This is a starting point to be verified in the

V&C appointment. After the vertical dimension is established

and tooth placement verified, the models are mounted to the

articulator. The setup is done checking landmarks to confirm

tooth placement, maxillary anteriors first followed by the

posteriors (Fig. 10). The lower teeth are placed, then working

and balancing is fine-tuned (Fig.11). The case is then waxed for

the try-in (Fig. 12). After the try-in, the dentures are invested and

1. Who is responsible for the shape and form of most denture teeth used today?a. Heraeusb. Paul Reverec. Leon Williams and Gysi

2. What year were the molds released?a. 1965b. 1921 c. 1912

3. To graduate, is it mandatory for all dental students to understand and do dentures?a. Yesb. No

4. What was one of the early commercially successful denture base materials?a. Woodb. Vulcanitec. Ivory

5. Is it possible to customize a denture tooth by simply removing layered acrylic and not jeopardize the integrity of the tooth?a. Yesb. No

6. What tooth was designed for high aesthetics, can be modified, and is an ideal choice for implants?a. Mondialb. Mondial ic. Artic

7. Ectodermal dysplasia only affects the teeth.a. True b. False

8. The location of the maxillary centrals isa. 8mm anterior to one-half anterior/posterior of the incisive papilla b. next to the scar linec. 8mm anterior to one-half mesial/distal of the incisive papilla

9. Intricate parts of overdentures are not disturbed by processing forces in the Palajet becausea. the acrylic is highly viscous when used in the palajetb. there is a valve allowing the low viscosity material to enter the moldc. the viscosity of acrylic makes it flow easily

10. When restoring a case where the patient has an existing bar, it is possible to use the bar as an impression jig to make an accurateimpression with proper position of implants.a. Falseb. True

CDT Contact Information

Name____________________________________________________________________________________

Laboratory Name __________________________________________________________________________

State ____________________City __________________________________ Zip________________________

CDT # (required) __________________________________________________________________________

E-mail ______________________________________________________________________________________________(for confirmations only)

Technical ArticleZ

ahn Dental • C

DT

Quiz • Sept/O

ct 2012 (Course 26350)

Quiz (Circle your answers)

screwed in a duoflak in preparation for injection in

the Palapress (Fig. 13).

The Palajet is designed for accuracy and

efficiency and utilizes a vent that makes it

possible to utilize the Palapress Vario or

PalaXpress Ultra and inject bar- and screw-

retained cases with the acrylic at lower viscosity.

With this advantage, acrylic fills the flask and

surrounds the intricate internal components and

the teeth that have been reduced to veneers. Then

the vent is closed with none of the components

being displaced. With the vent closed, the acrylic

is under pressure with additional acrylic injected

until it reaches the B stage in polymerization

where all the shrinkage takes place. So it is

possible to use wax to block out undercuts on

attachments and bars with wax to save

postprocessing time and improve accuracy

(Fig. 14). After the case is injected in the Palajet,

it’s cured in the Palamate elite (Fig. 15). Then

screws and vents are removed, and the denture is

finished in the conventional manner. Teeth

duplicating nature and properly placed can

transform a life (Fig. 16).

Receive .5 point documented scientific credit for passing the above quiz about this article. Return a completed quiz and contact information to Zahn Dental Marketing 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: zahn.dentalmarketing@henryschein.com. This quiz has been provided and approved by NBC (NationalBoard for Certification).

You must provide all information above to ensure you receive credit. Previous participants may not have earnedthe .5 credit due to missing information or new state requirements.

A copy of this quiz has also been posted on the Zahn Dental Web site @www.zahndental.com/quiz; click on CDT Quizzes.

Craig studied commercial art at Utah College; he obtained an Associate of Applied Sciences degree at TSTI in Waco, Texas

and opened his first laboratory with Dr. Jack Woolsey in Phoenix, Arizona upon graduation. He owned a full service

laboratory for 38 years. He has taught courses on implant overdentures at USC and has presented at the 2011 scientific

session of the AACD. He owned a dental practice in Chandler, Arizona and definitely has a different perspective on

modern dentistry. Currently, Craig is the technical manager of Heraeus. Craig Nelson AAS CDT

Solutions for the Edentulous Patient

Fig. 1 Fig. 2 Fig. 3

Fig. 7 Fig. 8 Fig. 9

Fig. 16

Fig. 4 Fig. 5 Fig. 6

Fig. 12 Fig. 13

Fig. 14 Fig. 15

Fig. 10 Fig. 11

is named the #1sought out technology product inIDT. Through compilation of theirreader service data, IDT examinedwhat technology products mostpeaked the interest of its readers.

Top 10 sought out technology products in IDT

Zahn Dental is pleased to announce thewinner of our 50/50 raffle, which took placeat our four day National Sales Meeting inFlorida. With over 100 tickets sold, Zahnraised $500 - and Henry Schein, Inc matchedthe donation bringing the total to $1,000.

Rita Acquafredda, VP Zahn & GeneralManager pulled the winning ticket - JeffSherman, Director, Private Brand Sales atHenry Schein.

50/50 Raffle Drawing for The Foundation

CREATE INCISAL CHARACTERIZATION

& TRANSLUCENCY

Presenter: Uri Yarovesky, CDTMonday October 15, 2012

Live Hilla Digital Transfer Webinar

HILLADigital Transfer

TMFor more information call Beth Collington at 631-672-0872 or visit ww.zahndental.com/education

12ZS5534_insidegate:07 8/8/12 11:27 AM Page 1