Lares Research 557 User manual

Distributed by:
Lares Research
295 Lockheed Ave
Chico, CA 95973 USA
Tel [phone]
Fax [phone]
Manufacturer:
Lares Research
295 Lockheed Ave
Chico, CA 95973 USA
www.laresdental.com
1-888-333-8440 © Copyright by Lares Research 2019
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Swivel Highspeed
Handpiece
Instructions For Use

Technical Specifications
ii

Table of Contents
i Technical Specifications.............................................................................................. .. ii
1 Product Description..................................................................................................... 1
2 Introduction................................................................................................................. 4
3 Safety.......................................................................................................................... 7
4 First Use...................................................................................................................... 15
5 Operation.................................................................................................................. 21
6 Reprocessing (Maintenance).....................................................................................32
7 Troubleshooting...................................................................................................... ... 47
8 Warranty Terms and Conditions............................................................................... .. 57
9 Replacement Parts.................................................................................................... 60
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1 Product Description
Highspeed Handpiece, Swivel, Push Button
1.1 Purpose – Proper use
Purpose:
This highspeed handpiece is
• Only intended for dental treatment. Any other type of use or alteration to the product
is impermissible and can be hazardous. The handpiece is intended for the following
uses: Removal of carious material, cavities and crown preparations, removal
of fillings, processing of tooth and restoration surfaces.
• A medical device according to relevant national statutory regulations.

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Indications for Use:
The Lares Research 557 and 757 handpieces are intended to be used by a licensed
dental professional to reduce hard tooth structure, carry out cavity preparations and
perform restorative dentistry.

Proper use:
According to these regulations, this handpiece may only be used for the described
application by a licensed dental professional. The following must be observed:
• The applicable health and safety regulations,
• The applicable accident prevention regulations,
• These instructions for use.
According to these regulations, it is the responsibility of the user to:
• Only use equipment that is operating correctly,
• Use the equipment for the proper purpose,
• Protect him or herself, the patient and third parties from danger, and
• Avoid contamination from the product.
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2 Introduction
Dear User,
Congratulations on purchasing this Lares Research quality handpiece. You are now the
owner of the most advanced highspeed handpiece available. By following these
instructions you will be able to work smoothly, economically and safely.
WARNING
For professional use only.
This product is intended for use only by licensed dental professionals.
Before operating handpiece, carefully read and follow these instructions.
Observe all cautions and warnings during use.

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SYMBOLS
Refer to the Chapter on Safety/Warning symbol
Important information for users and service technicians
Action request
Can be sterilized with steam up to 135 °C (275 °F)
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134 °C

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This document is intended for dentists and their assistants. The section on starting up is
also intended for service technicians.
WARNING
For professional use only.
This product is intended for use only by licensed dental professionals.
Before operating handpiece, carefully read and follow these instructions.
Observe all cautions and warnings during use.
CAUTION
Caution: United States federal law restricts this device to sale by or on the
order of a dentist. (21 CFR 801.109)

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WARNING SYMBOL
3 Safety
3.1 Description of safety instructions
Description of hazard levels
The safety instructions listed here, together with the three levels of danger, will help avert
damage and injury.
Structure
DANGER
The introduction describes the type and source of the hazard.
This section describes the potential consequences of non-observance.
The optional step includes necessary measures for hazard prevention.

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CAUTION
CAUTION
Indicates a hazardous situation that can cause damage to property or
mild to moderate injuries.
WARNING
WARNING
Indicates a hazardous situation that can cause death or serious injury.

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Hazards for the care provider and the patient.
In the case of damage, irregular running noise, excessive vibration,
unusual warming or when the bur cannot be held securely by handpiece.
Do not use further and have handpiece serviced.
3.2 Safety instructions
DANGER
Indicates a hazardous situation that can directly cause death or
serious injury.
DANGER
WARNING

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WARNING
Hazard from contraindication.
If the soft tissue in the oral cavity is injured, the compressed air may enable
septic substances to enter the tissue. Using the handpiece in the
presence of an open wound may result in subcutaneous emphysema
and accompanying serious patient health hazards, including permanent
disability or death.
Treatment with instruments operated by compressed air must be
discontinued when soft tissue is damaged in the oral cavity.
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Premature wear and malfunctioning from improper storage during
long periods of nonuse.
Reduced product life.
The handpiece should be cleaned, serviced and stored in a dry
location, according to instructions, before long periods of nonuse.
CAUTION

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CAUTION
Risk due to incorrectly stored handpiece.
Injury and infection caused by inadvertent bur contact.
Damage to chucking system from dropping the handpiece.
After treatment, place the handpiece properly in the handpiece nest,
without the bur.
CAUTION
Burning hazard from hot handpiece head and instruments head cap.
If the handpiece overheats, burns may arise in the oral area.
Never contact soft tissue with the handpiece head.
Do not use handpiece head as a cheek retractor.
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For safety reasons, we recommend that the push button chuck system be checked
before each use.
Note:
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Hazard from use as a light probe.
Do not use the device as a light probe with the bur rotating.
The rotating bur can cause injury.
CAUTION

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The following individuals are authorized to repair and service Lares Research products:
• Technicians at Lares Research
• Technicians specially trained by Lares Research
To ensure proper function, the highspeed handpiece must be set up according to the
reprocessing (maintenance) methods described in this Lares Research Instructions for Use,
and the care products and care systems described therein must be used. Lares Research
recommends specifying a service interval to clean, service and check the functioning of
the handpiece. This service interval depends on the frequency of use and should be
adjusted.
accordingly.
WARNING
Service may only be carried out by Lares Research-trained repair
technicians using original Lares Research replacement parts.
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Damage from soiled and moist cooling air.
Contaminated and moist cooling air can cause malfunctions and lead to
premature bearing wear.
Make sure that the supply of cooling air is dry, clean and
uncontaminated.
Hazard from non-sterile handpieces.
Infection danger to the care provider and patient.
Before first use and after each use, prepare and sterilize the handpiece.
WARNING
CAUTION
4First Use

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4.1 Attach the Lares MX swivel coupler.
Screw the Lares MX swivel/MaxPower LED coupler onto the dental unit hose and tighten
with the wrench.
Rotate the spray ring on the Lares MX swivel/MaxPower LED coupler (some models) in
order to regulate the amount of water.
4.2 Check the amount of water that flows from the handpiece.
CAUTION
Overheating of the tooth due to insufficient amount of cooling water.
Insufficient cooling of tooth structure during restoration can lead to dental
nerve necrosis and tooth loss.
Adjust the water amount for the spray cooling to a minimum of 50 cm3/min
(3.1 inch3/min).

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Check spray water ports and if necessary clean spray nozzles with the spray port
cleaning tool (Cat No. 10541).