1.2.2
Effects
The physiological and biological effects of laser radiation on tissue, safety consid‐
erations (effects on the eye) and treatment instructions are described in a separate
application manual.
1.2.3
Indications and contraindications
Therapy
Indications
Contraindications
General
Patients who suffer from photoder‐
matosis and photosensitive patients
(photoallergies).
Surgery on patients with serious
diseases of the hemopoietic system
(such as haemophilia and leukae‐
mia).
Ablation of primary carious lesions
in the region far from the pulp
Primary carious lesions in the re‐
gion far from the pulp.
Crown stump preparations
Cavities for preparing cast fillings
without subsequent mechanical
treatment
Ablation of primary carious lesions
in dentin close to the pulp
Primary carious lesions in the re‐
gion close to the pulp.
Crown stump preparations
Cavities for preparing cast fillings
without subsequent mechanical
treatment,
Ablation of secondary carious le‐
sions
Secondary carious lesions that are
filled with composite (small cavities
or residual composite), or cement.
Amalgam fillings must be mechani‐
cally removed before laser therapy.
Given the good reflection of IR radi‐
ation by gold, gold fillings must be
mechanically removed beforehand.
Crowns must be mechanically re‐
moved before laser therapy.
Metal should not be irradiated since
it can heat the surrounding tissue.
Likewise, spatter from removed
metal can damage peripheral tissue
and quickly damage the window.
Dentin conditioning
Condition the dentin surface to pro‐
mote the adhesion of the filling in
cavities that were upgraded using
the KEY Laser 3+ / III or were pre‐
pared by a rotating instrument.
None known.
conditioning the enamel
Condition the enamel surface to
promote the adhesion of composite
fillings in cavities that were upgra‐
ded using the KEY Laser 3+ / III or
were prepared by a rotating instru‐
ment.
None known.
Fissure sealing
Preventative seal of caries-free mo‐
lars and premolars
Enhanced fissure sealing after initial
preparation of the curious fissure.
None known.
root canal disinfection:
Reduction of germs in the root canal
after mechanical preparation for vi‐
tal extirpation or treatment of an in‐
fected canal.
None known.
Instructions for use KEY Laser 3+ 1343 KEY Laser III 1243 upgraded
1 User instructions | 1.2 Purpose – Proper use
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