The Dent-Liner
Volume 5 Issue 4
Fall 2001
A BULLETIN DEALING WITH ISSUES FOR DENTAL HEALTH PROFESSIONALS
| Inside This Issue |
| 1. Opti-Cast Denture Pour Technique |
| 2. Healthcare Handwashing Study |
| 3. Today's Product - Thixo Rock |
| 4. Who's Visiting the Dentist? |
| 5. Trade News - Dent-Line Moves to a New Location |
| 6. Black Tea Benefits |
Opti-Cast Denture Pour Technique
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Opti-Cast Denture System
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Precision of Fit
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Surface Quality
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Biocompatible
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Cadmium Free
|
Opti-Cast Denture Pour Technique
Bredent introduces Opti-Cast, a system that is a quick and effective
way of producing a premium dental restoration. The procedure requires microwavable
gel and a pourable acrylic. The time savings are a real advantage and the
dentures come out clean which leaves finishing to a minimum. The procedure
begins after waxing the denture to finish. The model is soaked and
placed on the metal base plate of the flask. Then the plastic flask is
snapped over the base plate and the pour holes are plugged with the silicone
plugs ensuring proper positioning of the sprues. The Bre-Gel is melted
in the microwave at 600 to 800 watts for 3 minutes, then stirred to achieve
uniform heating and melted for 2 more minutes. When the gel is cooled down
to 40 to 45 °C, pour carefully into the channel and fill up the flask.
The flask is cooled down in cold water for 45 minutes to set the gel. The
metal base plate is separated from the flask and the model is carefully
deflasked using compressed air to gently separate it from the gel. Drill
holes into the gel with the tubeto provide access to the mould for
the acrylic. Remove the wax and teeth from the model and soak it for 10
minutes. Before the teeth are placed back into the gel mould they require
grinding on the neck and base to increase retention, using the bredent
set-up grinding tool (34001010). The model is coated with Iso-Plast (540010190)
to isolate the surface. The model is returned to the mould and the flask
is closed in the correct position. Opti-cast monomer and polymer are measured
and mixed then slowly poured into the open channels or sprues. Entrapped
air escapes when the flask is swayed back and forth. A delay in polymerization
can be achieved with cold water by introducing it into the mould before
placing the plugs. This way the resin can continue to flow during the polymerization
phase. The flask is placed into a pressure pot for 30 minutes at 40 to
50 °C. After curing the denture is deflasked from the gel and the sprue
channels are cut off. The denture is then mounted for balancing the occlusion.
Trimming and polishing will be easy since there is no plaster embedded
between the teeth. Also, the fluidity of the resin allows it to adapt to
the model much better in the retentive zones than conventional resins.
The entire technique from flasking to deflasking should take approximately
2 hours. The Opti - Cast Assortment contains 500 grams each Dentaplast
powder and liquid, 30 ml. of Iso-plast separator assorted measuring cups
for liquid and resin and a mixing cup, silicone and sealing plugs
and Opti-Cast flask and punching tube (36001264) Source: Peter T. Pontsa
RDT. For further information, pricing and availability call Dent-Line
of Canada at 1-800-250-5111.
Hand Washing Study
A healthcare worker study found that hand
sanitizers increase hand washing rates. Hand washing has been widely and
repeatedly identified as the single most effective means of controlling
and preventing infections. A study published in the March 2001 issue of
American Journal of Nursing finds that health care workers are more likely
to sanitize their hands when alcohol-based hand sanitizing gel is available
as an alternative to soap and water. Hand washing or hand antisepsis rates
increased by nearly 44% when health care workers studied had access to
the hand sanitizer. Overall, the hand sanitizer was used approximately
60% of the time. The three-phase observational study was conducted over
a five month period at the University of California / San Diego Medical
Center. Phase 1 established a baseline compliance level by observing how
often health care workers washed their hands prior to patient contact;
the baseline was 39.6%. Two to six weeks after installing an alcohol-based
hand sanitizing gel, compliance rates rose to 52.6%, a 32.8% increase.
Phase III was conducted 10 to 14 weeks after installing the hand sanitizer.
Hand antisepsis compliance rates increased to 57%, an 8.4% increase over
Phase II and a 43% increase above the baseline level. Source: Kimberly
- Clark Skin Wellness Institute.
Today's Product - Thixo Rock
New from Bredent - this super hard die stone features extreme hardness,
extended processing time and low setting expansion. These are specified
requirements of DIN EN ISO 26873 for class four gypsums. It exhibits high
stability on the spatula and fine flow capacity on the vibrator. Splinter
and chip free sawing and grinding with precise reproduction can be obtained
due to minimal expansion values < 0.08%. Careful in-process controls
ensure the high consistency of the batches of stone.
For information and pricing call Dent-Line at 1-800-250-5111.
Who's Visiting the Dentist?
Dr. Richard Manski of the University of Maryland Dental School compared
data from 1977, 1987 and 1996 surveys about dental habits and found the
following, Americans go to the dentist's office less often than they did
two decades ago, except for two groups; people over 65 and preschoolers.
Dr. Manski attributes the rise in dental visits among older people to two
factors: people are living longer and more of them are keeping their teeth.
Among people who are 65 to 74 years old, the percentage with no teeth decreased
from 46% in 1977 to 29% in 1996. However, researchers are less certain
about why children under seven are visiting the dentist more often, especially
since their rate of caries has dropped steadily. The increase may reflect
a greater concern for baby teeth and a decrease in tolerance of untreated
decay or an increase in the number of dentists who are willing to treat
children. Women went to the dentist more often than men did throughout
the time period studied.
Source: Danbury News Times, Sat., August, 4 2001.
Trade News - Dent-Line Moves!
Dent-Line has moved to its new facilities located at 1170, 4th Line,
RR #1 Loretto,Ontario, L0G 1L0. The new phone number is 519-942-9315, the
fax, 519-942-8150. The 1-800-250-5111 for within Canada remains the same.
Benefits of Black Tea
Black Tea is good for the teeth, says US scientist. Scientists have
long probed the potential health benefits of green tea, a favorite beverage
in the Far East, but now a team of researchers from the University of Illinois
College of Dentistry has highlighted the benefits that drinking black tea
can have on your teeth. Source: Infodent May 23, 2001
The Dent-liner; Vol. 5, No. 4
Publisher: Peter T. Pontsa RDT
Editor: A. Van Breemen BA
E-Mail: info@dent-line.com
Subscription Rates:
Canada
1year $5.00
USA
1 year $7.00
International 1 year $15.00
