PRECISION MODEL SYSTEM:
- DRILLING UNIFORM HOLES: Drill each hole with a consistent speed and pressure on the drilling table, making certain to drill each hole at least two or three times in rather quick succession. The theory is the first drilling makes the hole, the second refines the hole size and shape, and the third time removes any debris.
- MARKING PIN LOCATIONS: The new Alignment Fixture eliminates the need to pre-mark the pin locations with a marking pen prior to drilling. Contact DVA for information and instructions.
- PROPER PIN INSERTION PRESSURE: Excessive pressure in the seating of each dowel pin into the drilled hole will result in undesirable frictional retention when the poured stone locks the two pins together. Light pressure is all that is required on each pin to create a stable die that is easily seated and removed.
- STABILITY for LARGE, MOLAR DIES: Additional stability in large molar dies or a last molar contact tooth may be achieved by placing three dowel pins in a triangle fashion within the molar component. Placing only two pins in a mesial, distal pattern will also aid in stability.
- SMALL ANTERIOR DIES: When the die size prevents the placement of two pins, simply drill only one hole per die. Using a small, round or inverted cone burr cut groves in the base directly behind the drilled hole creating an anti-rotational notch into which the the poured stone can be keyed.
ZAPIT BASE:
- When applying base, if a large quantity is required, apply in layers rather than one bulk application. Be sure to accelerate between layers.
- When accelerating use a fine mist. Back off to some extent; do not hold the sprayer too close!
- To ensure a smooth surface, apply accelerator first, then base. This action will cause hardening from the inside progressively toward the outer layer.
- To eliminate the possibility of a warped bridge due to wax shrinkage, or to improve the accuracy of fit of long-span bridges, use a razor to separate the various sections of the bridge. Place a drop of Zapit in each joint and apply accelerator to both sides of the junction. Zapit will preserve the relationship without the shrinkage and stress associated with cooling wax. Wax can then be applied over the Zapit for final contour. This technique also exposes nonparallel abutment situations. The Zapit joint will crack upon removal of the waxed bridge identifying the problem before casting. Using Zapit in this manner will also identify undetected undercuts on preparation; the ‘locked’ wax segment will break-away from the wax structure upon removal from the die.
- Keeping Zapit Tips working like new is very easy. When a Tip clogs, and we know it will, simply place the clogged Zapit Tip into the bottle of Tip Cleaner. Place the second, supplied Tip on the bottle. Thereafter, whenever a Tip becomes clogged, simply ‘rotate’ it with the Tip that has been in the Tip Cleaner. Continue to repeat and rotate tips as is required. Proper care will increase your return on the use of this excellent and helpful product.
CONDITIONER AND DIE SPACER:
- The ideal appearance of a finished stone surface should have a dull “egg shell” look. A high gloss surface is not desirable, as it will weaken the bond of the Die Spacer to the die. Immediately wipe off excess Conditioner with a tissue to prevent an excessive buildup on the surface. Properly applied, Conditioner will strengthen margins and reduce abrasion to contact areas and opposing occlusal surfaces.
- Shaking the bottle and observing a frothing or bubbling occurring on the surface can easily determine the proper consistency of Conditioner. Thinner should be added to Conditioner as required to preserve this level of consistency.
- With regular use, the die spacing material normally “thickens,” causing the material to be somewhat more difficult to apply in smooth, even layers. The packaging into two, smaller, half ounce bottles by DVA, reduces the amount of “free air” in the bottle, thus reducing the rate of evaporation of the carrier and the thickening of the spacer material; the working life of the product is thereby extended!
- A one-half ounce bottle of Thinner is supplied with each order of Die Spacer. The Thinner is mixed into the thickened spacer until the desired viscosity is achieved. As an additional note, the Conditioner Thinner is chemically identical to the primary Spacer material, and can be substituted for use with the Die Spacer.
HOTSTIKZ:
- MATRIX FABRICATION: When fabricating a labial matrix, apply Hotstikz evenly across the surface of the teeth in layers. As one layer begins to cool apply an additional layer(s) until a desired thickness and firmness is achieved. Allow the model to cool, use of an air gun with low pressure or applying cool water will hasten the cooling process and facilitate the removal of the matrix.
- HOTSTIKZ is excellent for protecting margins during blasting and cleaning procedures, and for use in protecting sensitive areas from during etching procedures.
- Use With Laminates: Hotstikz is very helpful in use with laminates as one can easily fabricate a small handle to ease placement in the mouth by the dentist. Position the nozzle of the Hotstikz Gun almost directly in the center of the laminate. Gently squeeze the trigger applying a small amount of material to the surface. Pull back on the gun just slightly creating a “tale” extending from the surface. Hold this position as the “tail” cools and remove the gun. The resulting extension (tail) of the Hotstikz material provides a convenient handle that is easily removable after placement.
TAC GEL:
CLEANING OF THE TIP: The dispensing tip attached to the syringe may clog at some point. Simply remove the tip and insert a wire from the back, hub-side to push out any hardened material. The tip can then be repositioned onto the syringe for repeated and ongoing use.