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Contra-Indications
•
Severe dust allergy, Asthma, or Chronic pulmonary
disease
•
Recent extraction or oral surgery
•
Any lesion, sore, or open wound
•
Sutures in the mouth
•
Recent periodontal surgery
•
Advanced periodontal disease with a compromised
periodontal attachment
•
Recent placement of orthodontic appliances with
resulting oral abrasions
•
Subgingival caries removal
•
Any condition that would place the patient in
greater risk of emphysema by using compressed
air in the mouth
Indications
Intra-Oral
•
Prepare teeth for Class I, II, III, IV, V and tunnel
restorations
•
Prepare teeth for veneer/facing restorations
•
Prepare teeth for pit and fissure sealants
•
Partial removal of composite restorations and
repair at failure sites
•
Etch metal, porcelain, and composite restorations
prior to repairing them
•
Removal of composite, amalgam or porcelain
restorations
•
Remove residual stains from enamel and dentin
•
Removal of stain and calculus from teeth
Extra-Oral
•
Clean cement from displaced crowns prior to
recementation
•
Clean restorations prior to recementation
•
Etch internal surfaces of restorations
•
Etch stainless steel crowns
•
Carve occlusal anatomy in porcelain restorations
prior to cementation
•
Satinize metallic restorations to locate interference
prior to cementation
•
Repair prosthetic appliances
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The Welch Allyn / Kreativ Mach 7/8 Air Abrasion system is
designed to remove tooth structure and other materials to
prepare teeth for restoration, and as an adjunct to a high
speed dental handpiece and bur. The system
delivers a
controlled mixture of abrasive particles in a dry air stream
through the handpiece nozzle.
This manual should be thoroughly reviewed before
installing and/or using the equipment. Please call
Welch Allyn / Kreativ or their representative if you need
additional information regarding installation, operation,
or service of the instrument.
The Mach 7/8 system is designed for use only by and
on the order of a dentist.
Mach 7 Main Controls
(See page 5 for Mach 8 control differences)
Figure 1: Mach 7 Controls
Power
Turn power on or off
Air Control
Select Ready or Standby mode to pressurize or
depressurize the system
Beam
Intensity
The amount of abrasive powder delivered to the
handpiece nozzle. Range: 1 to 10.
Particle
Energy
The pressure at which the abrasive powder is
delivered. Range: 40-120 PSI (275-825 kPa).
Nozzle
Selection
Press to select a nozzle: Standard handpiece
(Gray, Green, or Blue), or Super Sonic
handpiece (Red, Gold, or Violet).
Low
Powder
Indicator
Low powder level will cause an error to display
on the Beam Intensity and Particle Energy
LEDs. The unit will continue to operate. See the
Error Code definitions on page 8.
Low Air
Indicator
If the Input pressure is insufficient to keep the
pinch valve closed or the system is unable to
reach selected pressure, the unit alarm will
beep and an error will appear on the Beam
Intensity and Particle Energy LEDs. See the
Error Code definitions on page 8.
Particle Energy
Beam Intensity
Power
On/Off
Nozzle
Selection
Handpiece
Cradle
Handpiece Hose
connection
Mode
Select
