Ticonium Premium 100 Technique Manual

TM
premium 100
TECHNIQUE MANUAL
TICONIUM COMPANY
DIVISION OF CMP INDUSTRIES LLC
Albany, New York
USA
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remium 100
Ticonium Technique Manual
ith pictures and clear, concise instructions, you will find this Technique Manual
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For best results, follow these instructions carefully. Thank you for your support of Ticonium Company.
DUPLICATION ..............................................................................................2-8
MODEL PREPARATION...............................................................................9-10
SPRUING .................................................................................................11-16
METAL MIZER & INGOT ALLOY .............................................................17-19
PAINTING & FLASKING...........................................................................20-23
easy to understand. Please keep it in a handy place for quick reference.
BURNOUT.....................................................................................................24
CASTING .................................................................................................25-26
FINISHING ..............................................................................................27-30
REPAIR ....................................................................................................31-34
TECHNIQUE AT A GLANCE...........................................................................35
PROCEDURES & PRECAUTIONS....................................................................35
INDEX...........................................................................................................36
PREPARED BY: Ticonium Company Division of CMP Industries LLC P.O. Box 350 Albany, NY 12201
Copyright 2003
All Rights Reserved
1
DUPL I CAT ION
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Ticonium duplicating material normally does not require dilution, however, you should be famil­iar with the strength of the duplicating material. The duplicating material cannot be too stiff, this will decrease the setting expansion of the investment when poured into the duplicating material.
After removing the master model from the colloid, you should check the strength of the walls of the duplicating material. If they are more rigid than usual, distilled water should be added to the material and remelted.
(see figure 1)
Figure 1:
DIONIZER WATER
DISTILLER #61750 Ticonium Dionizer
Cartridges produce water equivalent to single distilled water, removing all ionized particles except free carbon dioxide and silica. They deliver water hat is ideal for duplicators, mixing investments and many other uses within the laboratory. Resin color change shows when to replace cartridges. Comes complete with cartridge, mounting bracket and accessories.
refractory model.
The Ticonium Technique provides three methods to achieve this:
1. Hygroscopic Expansion – is directly
related to the percentage of water existing in the duplicating material. The hygroscopic expansion should be approximately 0.3%.
2. Setting Expansion – is achieved when the
Ticonium Investment is mixed according to ratios indicated later in this chapter, and vibrated into the duplicating material. During the setting of the investment in contact with the duplicating material, the setting expansion should be approximately 0.4%. It is easy to understand that if the duplicating material is too strong the investment cannot expand properly.
3. Thermal Expansion – the average
thermal expansion is 1% and is achieved when the flasks are placed in the oven and burned out at 1350° F (732° C).
AUTO-DUPLICATOR INSTRUCTIONS
The use of a Ticonium 2 or 3 1/2 gallon Auto-Duplicator will simplify the melting of the duplicating material. Ticonium Auto-Duplicators will perform melting and cooling operations automatically and maintain correct pouring temperature at all times. (see figure 2)
Because of weather conditions and shipping distances, it is possible that the same material will present different characteristics. The quantity of distilled water added to the material will vary for each specific situation. It could be rated from100 cc’s per each four pounds of material to 300 cc’s per each four pounds. We believe this information is important due to the shrinkage of Ticonium alloy after casting, which on an average represents 1.7%, and will be compensated for by oversizing the
Figure 2:
2 Gallon #405811 & 3-1/2 Gallon
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AUTO-DUPLICATORS
#405711 Auto Digitals
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Place small chunks of material inside the Auto-Duplicator and follow the detailed information provided in the Auto-Duplicator Operating Instructions
Periodic maintenance of the Auto-Duplicators is necessary. The inside tank should be cleaned once a week. The inside cover and blades of the Auto-Duplicators should also be cleaned and all the stainless steel parts should be sprayed with a silicone lubricant periodically.
PREPARING MASTER MODEL FOR DUPLICATION
After designing, surveying (see figure 3) and blocking-out of the undercut areas, relieve tissue undercuts with TICENE or WAX.
(see figure 4)
Remove TICENE from model after duplication and store for reuse. Choose the sprue cone to be used with each master model. The sprue cones are 7 mm high. Correct placement on the lower cases should be 7 mm from the lower part of the lingual bar.
Figure 3: SURVEYING
Figure 4: RELIEF
of unnecessary undercuts and sprue placement
For upper cases the sprue cone should be placed approximately 4 mm from palatal bars or from horseshoes. It is also important that with uppers the criteria of placing the sprue cone perpendicular to the occlusal plane be followed.
A
Figure 5: MOUNTING
of “A” & “D” Sprue Cones
D
An easy way to place the cone in the correct position is as follows:
1. Place the cone in a lying down position
so that the edge of the sprue cone touches the design of the lingual bar.
2. Tilt back to vertical position and seal.
Always be sure that the cone is placed perpendicular to the occlusal plane.
“A” Sprue Cone (#TD-1475A) is used for flat surfaces.“D” Sprue Cone (#TD-1475D) for inclined surfaces – (see figure 5) refer to Sprue Cones on page 12. Secure sprue cones to the master model with wax. If the case will not be sprued through the investment model, no sprue cone will be needed at the point.
3
TWO METHODS OF
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iconium Premium 100
SOAKING STONE MODELS
There are three parts to the duplicating flask:
(see figure 7)
1. Soak model
approximately 20 minutes in tepid, slurry water. (see figure
6) Slurry water is the liquid resulting from storing large pieces of stone in a bottle of water and using the resulting solution. This solution will
Figure 6: SOAKING MODEL
to be duplicated in slurr y water
not etch the model whereas tap water will. (If large areas of model
are relieved with sheet wax, soak model with teeth pointed down.)
Some technicians prefer to use slurry water from model trimmers. The idea is good, although, special precautions must be taken. The slurry water from model trimmers has a milkish appearance and a large content of powdered stone. Prior to using this slurry water the container should be left aside for a couple of days to allow the sediment to settle. Then, the liquid should be filtered and transferred to a new container. If this procedure is not
followed, a residue of stone will deposit on the master model, including areas at the tips of the clasps, and rest preparations, changing the configuration of the master model, which will result in a poor fitting casting.
2. Another method of soaking the model
is to stand the model in about 1/4” of water and let the model soak by capillary action. This is the preferred method, but will take slightly longer.
After the model has been soaked, blow off excess water and duplicate.
1. The base
2. The body
3. Pouring spout
Two flask sizes are provided. Use the one which provides at least 1/2” clearance between the edge of the cast
Figure 7 :
DUPLICATING FLASK
and the rim of the base. Place TICENE Blocking Clay (#14) in the rim of the base.
This serves two important purposes:
1. It forms a seal between the base
and body so that there will be no leakage of duplicating material during the duplication process.
2. It will also act as an insulator when the
cooling process is begun.
Secure master cast to base of flask with TICENE. Place flask body on the base and seat firmly. Position a ball of TICENE behind each venthole on the shoulder of body. Place pouring spout into flask body.
Center duplicating flask under pouring spout. (see figure
8) Open valve until the duplicating material flows in a stream about the diameter of a lead pencil. When the duplicating material reaches the level of
Figure 8: POURING
the 2 ventholes, place the TICENE
over the vents and continue filling the flask until at least 2/3 of the pouring spout is full.
4
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Place the flask in circulating tap water.
(see Figure 8) The temperature of the running water used for chilling is directly related to the temperature of the room in which the chilling is being done. If the temperature of the water is lower than the temperature of the room, a desir­able pattern of cooling will result. Regulate depth
of water so it covers only the base of the flask. The water should not be below 55°F (13° C).
30 minutes is required to chill small duplicating flasks.
45 minutes is required to chill large duplicating flasks.
After proper cooling time has elapsed, you will note a dimple in
Figure 9: CHILLING
DUPLICATING FLASK
the colloid in the pouring spout. This indicates that colloid has been pulled toward the chilling base, assuring you that the duplicating material is fixed firmly against the surface of the model inside the flask.
NOTE: DO NOT lift one side of model before
the other.
If sprue cone remains in duplicating material, it can now be removed. (see figure 11)
Figure 11:
IMPRESSION
with sprue con
e
Use Ticonium
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INVESTIC
WARNING: INVESTIC
for refractory or investment models.
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is harmful when inhaled repeatedly over a long period of time. Care should be taken to avoid breathing dust caused by use of this product. This product contains a blend of silica and plaster. Symptoms may not appear until permanent lung injury (silicosis) has occurred. Immediate clean-up of spills is highly recommended.
EFFECT OF WATER
Remove the pouring spout by twisting it slightly. Cut off excess duplicating material projecting from the body of the flask. Remove the base by prying with a knife between the base and body of the flask.
Insert two knives in depression made by the dabs of TICENE. The model is removed with a quick snap. Pry up, using the walls of the body of the flask as a fulcrum.
(see figure 10)
Figure 10:
REMOVING MASTER MODEL
Most communities are chlorinating and/or fluoridating the water supply. It is becoming more and more essential to use distilled water for mixing investment and duplicating material. Laboratories have noticed a pronounced difference in the behavior both of the investment and duplicating material during different seasons. Hence, the recommendation is that only distilled water be used in mixing both investment and duplicating material.
The recommended proportion is 29 cc of
distilled water to 100 grams of Ticonium investment. (Always use room temperature
water. Hot or cold water will accelerate or retard setting time of investment.)
Use 28 cc of water to 100 grams of investment for large horseshoe or full bases.
5
NOTE: Use an accurate scale and syringe
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for measuring. (see figure 12)
The Dionizer Distiller (#61750) will eliminate variables in water such as chlorination, fluorination and deposits of mineral salts in hard water. (see figure 1 on page 2)
Figure 12:
CAREFULLY WEIGH
inve stment and mea sure wate r for accuracy
Before vibrating the investment into the duplicating material, blow out any “free water” left in the impression, after the master model is removed from the colloid.
NOTE: The above recommendation is important
to avoid a powdery investment model.
Vibrate directly into the mold. Place a little investment in the teeth and along the ridges and vibrate to displace all trapped air. Then add enough to fill the mold. DO NOT make it flow around the mold as this may cause inaccuracies where salts are removed from the duplicating material by the flow of investment.
Vibrate a small amount of investment around the sprue cone to form a seal. Now remaining vibration can be accomplished without holding sprue cone. (see figure 13)
Mechanical spatulation of a mix used for models is highly desirable. The expansion obtained with the investment when it has been mechanically spatulated can be controlled much more closely than is possible with hand spatulation. The investment has been compounded to provide a combined setting and hygroscopic expansion of 0.7% when mechanically spatulated for 30 seconds at a water/powder ratio of 29 cc to 100 grams and then poured into Ticonium duplicating material.
If the water/powder ratio is dropped to 26 cc to 100 grams, the combined setting and hygro-scopic expansion can be forced upward to 1.1%. Thus a very wide control range has been built into the investment.
Excessive spatulation will tend to break down the crystalline structure of the investment whereas insufficient spatulation will cause a weak model.
If spatulation is by hand, 60 seconds is needed.
Figure 13: VIBRATION
NOTE: By vibrating investment around the steel
sprue cone, the sprue hole produced is smooth and dense.
After pouring the refractory model the duplicating flask should be placed in a location which it will not be subjected to continued vibration while other cases are being poured.
Effect of Vibration
If the impressions are placed on the bench alongside the vibrator as additional refractory models are poured, the continued effect of vibration will bring moisture to the interface between the colloid and the model. This water layer will result in a powdery surface on the model.
DO NOT ALLOW TICONIUM INVESTMENT
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TO EXTEND TO THE BODY OF THE FLASK AS THIS WILL RESTRICT THE AMOUNT OF SETTING-EXPANSION OBTAINED.
Allow investment model to set 60 minutes, minimum, before separating from colloid.
SPECIAL NOTES
Occasionally it is a good idea to check your operating procedures. Many minor deviations can occur. These deviations add up and can cause real difficulty.
The following is a list of the problems which may occur and the errors that cause them.
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1. STORAGE OF INVESTIC
Investment material will pick up moisture if exposed to humid air. Therefore, it should be kept in a tightly closed container and in a cool, dry place.
Investic is doubly protected in a water resistant carton and a polyethylene bag. To prevent prolonged exposure after the package is opened, the material is packaged in 25 pound containers.
To get the maximum protection, we recommend that after you have removed investment from the polyethylene bag you squeeze the bag down snugly against the surface of the investment, thus squeezing out any air (see figure 14) and preventing prolonged contact between the investment and air.
:
Figure 14:
SQUEEZE AIR
out of investment bag to prevent cont amination
The 25 pound pack is a convenient unit to use right at the bench and many labs now use it instead of the wall mounted plaster bin. However, if you are still working with the plaster bin, check its location. In many instances the bin is located alongside a boil-out tank where steam is given off and allowed to come in continual contact with the investment. This will cause difficulty.
TM
2. PROPER HANDLING OF INVESTIC
:
Attention must be given not only to the investment, but also to the materials used in conjunction with it.
3. TESTING: Ticonium INVESTIC
TM
can absorb moisture from the air which will affect accuracy. Investments may be checked as follows:
When a new package of investment is opened, mix 30 cc of distilled water with 100 grams of investment for 30 seconds, mechanically, or one minute by hand. Then check the time from the start of spatulation until the surface of the investment appears to be dry. To check the batch later, repeat this operation to see if the time corresponds. If moisture has been absorbed, the setting time will have increased.
4. SLOW SETTING: Slow setting
investment can cause difficulty. Slow setting is usually caused by severe hydration of the investment. To avoid trouble, keep the investment in a tightly sealed container.
RAPID SETTING CAN RESULT IF HYDRATED
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NVESTMENT IS MIXED WITH NORMAL INVESTMENT.
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I
INVE S TMENT MO D EL
The most common ways this may occur are:
A. Old investment clinging to the blades
of a mechanical spatulator.
B. Investment trapped in worn areas of
a plaster bowl.
C. Investment which has caked on the
weighing scoop.
Duplicating material which has been used during the day should be:
A. Rinsed off in cool tap water.
(Preferably giving final rinse in distilled water.)
B. Cut into small pieces.
C. Returned to a cool air tight container
and covered with a damp towel.
PREPARATIO N
IMPORTANT
Always allow the investment to set in the duplicating material for a 1 hour minimum. Premature separation of the refractory model is a potential cause for loose, powdery investment deposits.
Look for a change in investment setting time, particularly during the summer months (when humidity is high), as hydration of the investment may occur. Originally the hydration will cause a speed up in the setting time, but this will later reverse, and result in a retarding action. If the normal setting time of the investment, which is about 8 to 9 minutes
initial setting, starts to increase, the refractory
model may not be completely set and hard in the normal one hour.
Usually the moisture that remains on the surface of the colloid during rinsing is sufficient to replace lost water in the duplicating process. However, it may be necessary to add additional water to maintain proper consistency.
NOTE: Never store duplicating material
by immersing in water. This will cause the duplicating material to absorb water and rapidly lose accuracy and strength.
Also, never store the colloid near a heat source, such as sunny windows or boil-out tanks as this may result in water loss.
Following these simple rules, Ticonium Duplicating Material can be used effectively and with the greatest degree of accuracy for approximately 200 duplications or two to four weeks of normal use.
TECHNICAL INFORMATION
Remove duplicating material from duplicating flask and break duplicating material away from investment model. (see figure 15)
Figure 15:
SEPARATE
inve stment mode l from collo id
As soon as model is removed from mold, outline with a pencil approximately 1/4”from extremities of proposed pattern and trim with knife or wet model trimmer. (see figure 16)
8
Keep fingers off of abutment teeth, regardless
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of how model is trimmed.
Figure 16:
WET GRIND
inve stment mode l to outline
Immediately after trimming, the refractory model should be carefully rinsed under running water to rinse off any slurry adhering to it.
Dry model in the Ticonium Model Drying Oven (#40551) for approximately one hour
at 190°-200° F (88°-93° C). (see figure 17)
Be sure to check the temperature of the Model Drying Oven to prevent the temperature from going above 190°-200° F (88°-93° C).
Over-drying the model will result in the breakdown of the investment. It is best not to exceed a temperature of 200° F (93° C).
It is important not to obstruct the vents on the top of the unit, except the center one where the thermometer should be placed.
Melt beeswax in a pan or thermostatically-controlled pot.
Only refined beeswax should be used.
Check temperature of the wax occasionally until 280°-300° F (138°-149° C) is reached. If a thermometer is not available, you should dip just as the beeswax begins to smoke.
Figure 18:
BEESWAX HEATER #62133
Figure 17:
MODEL DRYING OVEN #40551 with
a large drying area
Thermostatically-controlled pots, such as Ticonium’s Beeswax Heater (#62133), are available to prevent over-heating of the wax. (see figure 18) These units are recommended to maintain proper control of beeswax temperature.
NOTE: Temperature of the beeswax is
approximately 100° F (38° C) above the temperature of the investment model.
9
When the beeswax has reached the proper
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temperature, immerse the dehydrated model. After a few seconds, a foaming action will be observed. The model should remain immersed for 15 seconds after foaming starts. It should then be removed and placed on a piece of absorbent paper so excess beeswax will drain off. (see figure 19) After a few seconds, move it to another position on the absorbent paper so that a pool is not allowed to collect at the base of the model and solidify. Allow model to cool and then begin waxing.
Figure 19:
MODEL DIPPED
in beeswax and set to dry
Excessive heat during drying or immersing the refractory model in the beeswax for too long will alter the subsequent thermal expansion of the investment.
SPECIAL NOTE
If you encounter difficulties with soft or powdery investment surfaces, follow the special notes described in the Duplication Chapter.
In order to use refractory models with these symptoms, leave the case on the bench over-night prior to drying and beeswax dipping. This overnight setting will allow the investment to improve in surface hardness.
The next day, place the refractory models in the Model Drying Oven and dry at 190°-200° F (88°-93° C) for 45 minutes. This drying process is fifteen minutes less than the normal recommended procedure because a large percentage of the water has already evaporated during the overnight setting and the model will be much easier to dry.
Next, dip in beeswax per normal recommendations in this manual.
Some advantages of beeswax dip over spraying are:
SPECIAL CARE IS NEEDED IN THIS STEP!
Contaminated Beeswax
After extensive use, the beeswax can pick up an appreciable amount of investment residue. Unless the beeswax is cleaned periodically, this residue may attach itself to the surface of the model during the beeswax operation.
PURE TICONIUM
BEESWAX #65
1. Eliminates soaking investment
model prior to applying the painting layer of investment.
2. Assures a smooth, dense surface on
which to wax.
3. The action of the beeswax during
dipping drives out any excess moisture in the model. Transfer the design from the master cast to the investment model with a wax crayon pencil. Use of a graphite pencil may cause pits in the final casting.
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WAXING
SSPPRRUUIINNG
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Ticonium Premium 100
One of the most important considerations in being an effective waxer is: ALWAYS USE WAX
OF KNOWN GAUGE OR THICKNESS.
Clean wax is essential. Wax containing debris will certainly result in pits in the finished case.
Use preform plastic patterns to aid you further in waxing uniformity. This will give your finished case maximum strength and minimum bulk.
TYPICAL TICONIUM WAX-UP
SPRU I NG
SPRUE PIN CLEANLINESS
If the sprue pins are not kept perfectly clean, the remaining investment will harden to the surface and can become bonded to the new investment. This will then loosely attach to the surface of the mold. If sodium citrate solution is used to soften the old investment and keep the pins clean, it is essential that they be thoroughly washed and rinsed before use. Since the sodium citrate solution is a drastic retarder, it will prevent the investment coming in contact with the pin, coated with sodium citrate, from setting.
First it is necessary to establish some basic facts on spruing.
1. All metals shrink during solidification.
We cannot eliminate this shrinkage. We can, however, compensate for the shrinkage of Ticonium.
The following gauges are suggested for either sheet wax or plastic stipple sheet:
1. Full upper palates – 26 gauge.
2. Narrow upper horseshoes – 24 gauge.
3. Broad upper horseshoes – 24 gauge.
4. Lower lingual plates – 24 or 26 gauge.
5. Saddle relief – 24 gauge.
6. Lingual bar relief – 28 to 30 gauge.
NOTE: Stippled TI-FORM patterns are
suggested for simulating tissue detail.
2. Never feed a thick section through
a thin section – ALWAYS SPRUE TO THE BULKY
SECTION OF YOUR PATTERN.
The ideal casting is one that gets progressively smaller in volume from the point of attachment of the sprue to the extremities of the casting. (see figure 20) It is impossible, however, to maintain this ideal situation since all dental castings vary.
Figu re 20 :
TY PI CA L S IN GL E SP RU IN G f ro m
bulk y to small er volu me ar ea s
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