Danville PrepStart Manual Del Operador página 4

Optional abrasive flow setting - In some situations an even lower flow of abrasive may be
required. For decreasing the abrasive flow below the standards settings described above, the
following directions must be followed:
1. Do the following to remove the cover from unit:
Remove the four screws from bottom of base that are located in the deep holes
■
on the bottom of the unit. Do not remove feet screws and/or feet.
Remove the cap and two o-rings located on the jar cylinder.
■
Tilt the back end of cover up until cover is removed from the bracket on front
■
panel.
2. Find the white plastic pinch clamp located next to the pinch cylinder, between the
pinch cylinder and the outside of the unit.
2.0 OPERATING INSTRUCTIONS
2.1 SUGGESTED PATIENT ORIENTATION & SELECTION
Pediatric patients respond well to first being shown a blast of air, or air abrasive, on their
■
hand, and then being told that the same painless spray will be used in the treatment.
For adults, a description of the 'high tech' nature of the treatment not only instills patient
■
confidence, but reinforces the uniqueness of your practice.
Adult patient selection is the first step: patients that respond poorly to the air syringe are
■
often not good candidates.
Lesions that are suspected as being very deep may involve a higher level of patient
■
discomfort.
2.2 TECHNIQUE OF USE
Note: Verify foot pedal operation by spraying into a waste container. If the device continues
to spray after the foot pedal is released, contact the manufacturer.
Tooth reduction:
1. Hold the nozzle at about a 60˚ angle up from the surface (a slight angle from perpendicular).
Angling the stream reduces sensitivity in dentin.
2. Hold the tip 1-2mm from the surface. Move in slow, even passes.
3. Inspect cut result after every few seconds.
Surface etching & aggressive stain removal:
1. Hold tip 5-10mm away from surface.
2. Dwelling will result in excessive surface reduction of the tooth.
3. Use slow sweeps on metals, ceramics and composites until surface is clean and evenly
etched.
2.3 PRODUCT DESCRIPTION
The PrepStart is a portable, self-contained, pneumatically powered device that utilizes
aluminum oxide particles in cutting tooth structure.
2.4 INDICATIONS FOR USE
The PrepStart system is intended for the following applications:
Cavity preparations for smaller composite restorations. Class 1 to VI.
■
Removal of composites, acrylic and other resin restoratives.
■
Pit and fissure prep.
■
Stain removal to reveal lesions.
■
3.0 MAINTENANCE & TROUBLESHOOTING
3.1 MAINTENANCE
Inspection (A-D) after every I lb. (500g) of abrasive use:
A. Desiccant chamber: Inspect the desiccant granules through the view window located in
the bottom of the unit (see Fig. 4.3). The orange indicator granules will turn green when
contaminated. Replace with new desiccant if necessary. Use the Service Wrench to unscrew
and to replace the cap. Clean 'o' ring and threads before replacing. Do not over tighten.
B. Abrasive jar: Clean threads and o-rings. Lightly lubricate o-rings with petroleum gel (see
Fig. 4.1).
C. Waste Powder Chamber: Unscrew the Abrasive Recovery Cap (see Fig. 4.3) using the
Service Wrench. Remove any abrasive from the chamber, clean the threads and replace the
cap. Do not over tighten.
D. Moisture trap: Very minimal, or no moisture should be found. While the PrepStart is
pressurized and held in a horizontal position, depress the trap stem (see Fig. 4.3) with a
finger tip: compressed air, and any moisture will be expelled. If more than a few drops of
moisture are found, additional water traps and filtration, may be necessary.
Inspect tips monthly or after 100 uses
Worn nozzles cut with greatly reduced efficiency. Uneven erosion of the nozzle bore reduces
particle acceleration and increases the angle of spray. Replace nozzles when enlargement of
the bore is noticed. Normal life is 100 to 200 uses. In extreme cases of wear, the stream will
1.10 EVACUATION
Abrasives and debris are collected by aspiration. High speed suction in most dentist's office
is adequate. The efficiency of collection improves dramatically as the assistant becomes
accustomed to seeking the moving 'cone of dispersion' . No damage to house suction has been
reported but more frequent cleaning is essential.
■
■
■
For chair-side use, a dust cabinet, such as the Danville Microcab™ or Macrocab™ is suggested.
SECTION 2 – OPERATING INSTRUCTIONS
■
■
■
■
■
■
2.5 CONTRAINDICATIONS
■
■
■
2.6 ANESTHESIA
Air abrasion has been used clinically for anesthesia free dentistry for over 10 years with
great reported effectiveness. Most users report few patients preferring an injection. A high
effectiveness rate is a combination of patient selection, verbal preparation and user technique.
Lower pressures and angling of the nozzle are key factors. Rubber dam clamp discomfort can
be controlled with use of lidocaine patches.
Factors associated with air abrasion's low sensitivity:
■
■
■
2.7 STERILIZATION & DISINFECTION
Warning: The handpiece and nozzle must be sterilized prior to each use. The hose assembly
and other elements that come in close proximity to patients should be sheathed or wiped
down in accordance with standard disinfecting procedures.
1. Place handpiece, nozzle with o-rings, free of abrasive and other debris, in a sterilization
2. Autoclave in saturated steam, 132 °C, 27.4 psi for 15 minutes.
3. Allow cooling for 30 minutes prior to handling.
SECTION 3 – STERILIZATION & MAINTENANCE
cut through the side of the carbide tip or through the stainless tube, which is a safety concern.
The bore can also be gauged by placing tapered endodontic files into the nozzle bore and
observing how deeply it will easily pass: .015" Nozzles - use a # 15 file; .019" - use a # 20 file;
.026" - use a #55 endodontic file: when most of the taper passes through the bore the nozzle
should be replaced.
Inspect Abrasive Jar O-Rings Monthly
Replace worn, damaged or leaky o-rings. Small leaks will result in abrasive cutting the jar
o-rings. Cleaning abrasive from the threads before replacing the cap will greatly extend o-ring
life.
Inspect pinch valve performance after every 6 months of use:
Pinch valve performance: The pinch valve controls the output stream of air / abrasive and
wears with use. A worn pinch valve tube will not shut off completely and will allow a small
amount of air to continue to escape. A badly worn pinch valve tube can even cause internal
abrasive leaks that will prevent use. Under normal use the PrepStart pinch valve tube will last
a minimum of one year.
Test: Place the nozzle tip in a glass of water. A leak will cause a bubble to form every second. A large
leak will cause a constant stream of bubbles and signals the need to renew the pinch valve tubes.
3.2 CALIBRATION
The pressure gauge should be calibrated annually to ensure proper operation.
2
3. Open the clamp to a full open position. The unit is now at its lowest powder rate
setting with the clamp fully open.
4. Replace cover.
Hold suction about 8" away and move to seek debris plume.
The tissues of the mouth trap most debris when a rubber dam is not used.
Place damp gauze in the back of the rubber dam to aid in collection.
Conservative preparation of incipient lesions.
Endodontic access through porcelain crowns.
Etching for all metals, composites, acrylics and amalgam for a superior bond.
Etching porcelain where hydrofluoric acid use is not advisable.
Aggressive stain removal. Removal of amalgam tattoos.
Enhancing bond to tooth structure. Acid etch after air abrasion has been shown to be
superior to an acid etch alone.
Removal of amalgams with any air abrasion device is not recommended. Mercury laden
dust is generated without the capturing water spray.
Clinical use which is not in accordance with the indications listed in this manual should
be avoided.
In all applications, clinical use must be subject to the discretion of the dental professional.
No heat or vibration (as are generated by the high speed handpiece).
Tubules are closed by the abrasive particles compacting the dentin.
The psychological benefits of not hearing the whine of the high speed.
pouch.