Injection-system swissjet-merzdental

Swiss Jet

Injecting and Pressing

The All - in-One Flask

"Swiss Jet convinces by simple operation and processing of hot-curingand cold-curing polymers with the highest compression and the lowestbite raising."

MDT Max Bosshart, Einsiedeln/Switzerland

2

■ No need for additional installations, hydraulic press sufficient■ For heat-curing polymers (e.g. Promolux®)■ For cold-curing polymers (e.g. Weropress®)■ For vinyl plastics (e.g. Luxene®)■ Optimum height-width-depth relationship due to triangular form■ Extremely wide and high models are also embedded without problem■ No need for bracket, screw connections are carried out under pressure in the

hydraulic press■ Constant pressure (20 kN, this corresponds to approx. 50 bar)■ Optimum compression of plastic■ No cartridge waste and residue, no costly incidentals such as sealing rings and

injection elements■ Precise closing■ Corrosion resistant

The Swiss Jet flask for the injection, tamping-pressing and casting processes is anallrounder. The corrosion resistant flasks, which close precisely due to the cone fitand which are designed to withstand the highest continuous stresses, are easy tohandle and do not require any additional installations such as compressed air anda special water connection. The use of both heat-curing polymers (such asPromolux®) or cold-curing polymers (such as Weropress®) is equally possible.However, the Swiss Jet flasks can also be used to process vinyl plastics (such asLuxene®). This makes the user independent of system providers. Neither cartridgewaste and residue nor other costly process-conditioned waste such as sealing ringsand injection elements accumulate.

The triangular form of the Swiss Jet flasks offer an optimum height-width-depthrela-tionship so that very wide and high models with protruding functional ridgescan also be embedded without problems. In contrast to common metal flasks, nobracket is necessary for Swiss Jet. The flasks are screwed together in the pressunder pressure, thus ensuring a constant pressure even after the withdrawal fromthe hydraulic press. In addition, deformations and inaccuracies are considerablyminimized due to the conical fasteners. At a pressure amounting to 20 kN (this cor-responds to approx. 50 bar), the resin is compressed optimally and the dorsal cra-cking is almost excluded.

Swiss Jet - Injection FlaskAn Overview of the Application

3

Inje

ctio

n Fl

ask

The parts are embedded with the identical plaster type which isused for producing the model. Superhard plaster type IV isideal. The model with the waxed on modellation is watered forten minutes and then insulated. Depending on the size of themodel, you need 250-300 g of plaster. The parts are embed-ded as with a conventional flask, with the only difference thatthe turning bolt is placed afterwards as follows into the plasterwhen it is still malleable: the cylindrical surfaces are embeddedin plaster up to the equator. The borehole shows verticallyupwards and the front end protrudes outwards. The embeddedobject should have at least one centimeter distance to thescrewed-on flask upper part.

The parts of the Swiss Jet injection flask1. Flask bottom part with bottom of the unit and cone admission2. Flask upper part guidance cones3. Injector base4. Injection cylinder with sealing ring5. Injection plungers with sealing rings6. Channel bolts7. Turning bolt8. Allen screws9. Allen key

Flask assembly

Before being embedded in plaster, the precision flask partshave to be thinly coated with Vaseline. This process makesdeflasking easier and protects the anodized layer of the flaskwalls. The use of a see water resistant aluminum base alloymakes the flask resistant against heavy corrosion.

Swiss Jet - Injection FlaskAn Overview of the Application

4

Va

seline

The flask upper part is put on and screwed together with thethree longer Allen screws. Only tighten "hand-tight". For theplaster counterpart you need approx. 350-450 g of plaster(here also ideally of type IV). The flask is filled up to theedge with plaster. Air pockets in the internal space of theflask can be avoided by gentle swaying the flask while it isbeing filled.

In an even layer silicon solution is adapted to the wax pros-thesis. The incisal regions and cusp peaks should be keptfree of silicon in order to avoid the teeth from migrating.Retention crystals make possible a secure bonding to theplaster. The silicon solution is molded retentively at the inputpoint of the injection channel in order to prevent the solu-tion from being entrained by the resin. The silicon solutionshould harden completely in the pressure chamber under 2-3 bar in order to eliminate the possibility of air pockets.After that, the plaster against plaster insulation takes place.

Tip:To avoid the cone guidance surfaces from being contaminatedwith plaster, silicon fasteners can be produced in the labora-tory. The borehole of the turning bolt can also be filled withsilicon. Before the material hardens, the channel bolt is pressedas far as it will go into the borehole. This auxiliary part canalso be easily be removed with compressed air.

An injection channel with a diameter of approx. 7-8 mm ismolded with a suitable wax - here mounting wax made fromthe teeth boards for transport. The channel must not bemolded higher than up to the turning bolt equator in order toensure that the turning bolt is tight. With upper jaw dentures,a channel is molded centrally on the palate. The ventilationchannels are molded as a "stump" on the furthest away dorsal area of the denture.

5

Inje

ctio

n Fl

ask

Swiss Jet - Injection FlaskAn Overview of the Application

As long as the plaster is still fluid, the injector base is put onand screwed together. In the external borehole you counter-sink the channel bolt until it arrests in the turning bolt.

The external borehole is slanted and safely directs the chan-nel bolt to the turning bolt. The displaced plaster escapesthrough the central borehole. The counterpart is set afterapprox. 30 minutes. The channel bolt is removed with arotary motion and the plaster surplus cleaned. The injectorbase remains screwed together. To be able to open the flaskafter heating, the screws are removed from the bottom of theunit before. The molding wax is plasticized after approx. 5 min in boiling water and the flask can be opened. Thewax is removed using clear, boiling water. The teeth aretaken from the counterpart, ablated, abraded and providedwith retentions.

Loop-like ventilation channels are milled into the plaster witha rose-head bur. This allows the air to escape from the inte-rior of the flask. The remargined resin loses considerablepressure on the way through the loop. The ventilation chan-nels can thus be closed more easily. The turning bolt is thendirected inwards with the open channel, allowing the resinto flow in. It is recommended that you try to rotate the boltwhen the flask is closed before the insulation in the case ofheavily expanding plasters. The bolt which may havebecome slightly jammed cuts itself free.

Swiss Jet - Injection FlaskAn Overview of the Application

6

The turning bolt is placed in opened position on the flaskbottom part, the borehole is pointing upwards. The flaskupper part and the flask bottom part are joined togetherexactly by means of cone guidance and screwed together.

Tip:A thin PE film between the injector base and the cylinderprotects the flask against contamination.

The artificial teeth which were abraded and provided withretentions are placed in the counterpart. A basal boxpreparation provides for optimum retention and handling.Moistening the artificial teeth with monomer does not resultin any improvement to the chemical bond to the base resin.

The plaster parts are treated with alginate solution. Allowthe channel to run full with insulation and blow out.

The model is insulated thinly and evenly. After that, theinjection flask is mounted.

7

Inje

ctio

n Fl

ask

Swiss Jet - Injection FlaskAn Overview of the Application

The maximum pressure of 20 kN is then built up. Cold-curing polymers are held under pressure for approximately 3-5 min. Heat-curing polymers can be compressed in this wayfor sev-eral hours in order to increase quality. Consult therespective instructions for use from your plastics manufacturer.

Note:Unfortunately, the hydraulic presses available on the dental marketdo not have any standard specifications. The maximum injectionpressure for the Swiss Jet flask is 20 kN. Many presses also showbar. Here the value is at approx. 50 bar. If in doubt, contact themanufacturer of your hydraulic press. If using Luxene, the pressurecan be increased to 30 kN.

Almost all dental resins can be processed in the Swiss Jetflask. Consult the respective manufacturers' instructions espe-cially with reference to: mixing ratio, swelling time, injectiontime, injection duration and polymerization arrangements.The corresponding resin paste is placed into the cylinder andthe plunger applied. Following that, the injection processstarts under the hydraulic press.

The flask is burdened centrally under the press in order toprevent the plunger from canting. The pressure should beincreased slowly until resin escapes from the ventilationchannels.

These channels are then closed. Half a toothpick is stampedin with a plastic hammer. Do not use any steel nails or rose-head burs for closing as the way the flask fits could beimpaired.

Swiss Jet - Injection FlaskAn Overview of the Application

8

The Swiss Jet flask has highly-precise cone guidances andjoining areas. They can easily get damaged by improperdeflasking. To remove the embedding plaster it is thereforerecommended that you use a plastic hammer. The internalspaces of the flask can be best cleaned with a stainless steelspan sponge (e.g. spirinette).

If the injection process is completed, the flask internal space isclosed by the turning bolt being turned by 180 degrees. TheAllen key is used for this, inserted into the borehole of the boltand the bolt is turned.

The internal space is now closed and the pressure is main-tained in the flask. The borehole of the bolt is pointingdownwards.After the cylinder has been removed, the polymerizationtakes place in the pressure chamber.

The cylinder is screwed off and can be cleaned, before theresin hardens. Surplus heat-curing polymers can be reused.No cartridge waste is accumulated. The sealing rings of theplunger and cylinder should be removed and cleaned.

9

Inje

ctio

n Fl

ask

Swiss Jet - Injection FlaskAn Overview of the Application

The polymerized denture immediately after the flask hasbeen opened.

The denture base materials fits very well to the denturetooth. The transitions are absolutely smooth. There is noneed for reworking the tooth - the wax modellation haspaid off.The resin is homogeneous, extremely well compressed andtherefore minimally contracted. There is a chemical andphysical bond to the integral® teeth.

The heat-curing polymer Promolux® and the cold-curing polymer Weropress® are optimum for the Swiss Jetinjection process. The colour C34 was used in the shown case.

Swiss Jet - Injection FlaskAn Overview of the Application

10

Weropress®Proven, easy to process cold-curing polymers based onmethyl methacrylate for universal application in partialand total prosthodontics

Advantages• simple dosage and processing• high transversal strength• easy to polish• allows for spaces running underneath such as

distinct tubers without breakage during deflasking• color stable

Application areas• total prosthesis in the injection, tamping-

pressing and casting processes• completion of combination dental prosthesis• fastening of teeth on model casting saddles• rebasements / base fillings• repairs• enhancements• dental splints / track production

Promolux®Proven, easy to process heat-curing polymer based onmethyl methacrylate for producing total prosthesis

Advantages• simple dosage and processing• high load capacity• easy to polish• high final hardness• color stable

Application areas• total prosthesis• hybrid denture / cover denture• rebasements / base fillings• Track production

11

Inje

ctio

n Fl

ask

Swiss Jet - Injection FlaskAn Overview of the Application

08/2

005-

1090

236/

GB-

en

Sales:Merz Dental GmbHEetzweg 2024321 Lütjenburg - Germany

Sales Germany Tel. +49 (0)4381 / 403-418/-419Sales export Tel. +49 (0)4381 / 403-417Sales Fax +49 (0)4381 / 403-403Technical support Tel. +49 (0)4381 / 403-450

www.merz-dental.de · [email protected]

Merz Dental is certified in accordance with DIN EN ISO 9001/DIN EN ISO 13485 and thus offers the security and the advantages of a future-oriented quality management system.

Photos shown can differ in colour of the original product. Printing errors possible.