Why the glass?
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Meltablity
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Workability
Rigidity
Chemical resistance
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Main characteristics of ZX-27
glass
• Melting temperature: 1560-1600 C
• Pressure strength: 120-150 Mpa/kp/mm2
• Acid resistance: Hydrolitic Class1.
• Alkaline solubility: Hydrolitic Class 2.
Indications
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Kennedy 3
Kennedy 2
Kennedy 1
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Kennedy 4
Kennedy 1
Kennedy 2
• Unilateral status
• Bilateral status
• In combination with implants
• Supporting arching of large splinting bridges
floated own
block tooth
place of
glass block
in raft
amount of
fixed raft
Principles of ZX-27 Attractive Glass
Abutment System
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•
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the most important is to have a firm and pronounced
alveolar ridge at the place of future ZX-27 glass
abutments,
unwritten rule: the more proper pillar teeth are ground
meszially, the more missing teeth may be replaced
distally (i.e. when replacing 5 and 6, it is ideal to grind 3
and 4; 5 will make the pontic and 6 will be the glass
abutment),
glass abutment is always the most distal part of the
bridge with shortened dental arch (Kennedy 1, Kennedy
2),
there must be at least one 1st class pillar among the
prepared own teeth; the more 1st class ground pillars,
the better the result,
glass abutment must have his antagonist to renew
occlusal relations and denture function
Attractive Glass Abutment System:
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Contraindications:
• unstable
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flabby alveolar ridge (5-8 mm side movements),
• insufficient alveolus height and widths with extensive bone
resorption,
•very narrow alveolus forming a narrow ridge created partially
by submucous tissue,
•insufficiently healed alveolus after extractions,
Patology
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Cytological smears from the mouthwash fluid mainly contained
superficial, mature cells. In 17 sears
of 3 patients with glass abutment
amongst the 67 cytological specimen
of 9 patients were found a few
keratinized but otherwise typical cell
beside the large number of non
keratinized epithelial elements.
Typical keratinized stratified
epithelium was present on the surface
of the gum under the glass abutment.
Keratinization corresponded to
parakeratosis and hyperkeratosis
histologicaly. There were no mitotic
figures amongst the epithelial cells,
layers of the epithelium presented
typical maturation tendency towards
the surface.
1
2
3
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The applied fixative poorly fixed tissue
glycogen, however the cytoplasm of
the cells contained abundant
glycogen.
4
The applied fixative poorly fixed tissue
glycogen, however the cytoplasm of
the cells contained abundant
glycogen.
5
The applied fixative poorly fixed tissue
glycogen, however the cytoplasm of
the cells contained abundant glycogen
also noticed, although the keratinized
layer seemed to be thinner compared
to those under the glass abutment. .
6
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Static analysis
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Modeling of vertical direct
stress potential incase of
glass abutment support.
Load:100 N (vertical force)
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Modeling of vertical direct
stress potential incase
non-supported openended bridge. Load:100 N
(vertical force)
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Three dimensional model of
glass-abutment support.
Load:100 N (vertical force)
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Three dimensional model of
non-supported bridge.
Load:100 N (vertical force)
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Model of glass abutment
supported bridge force shift
in case of 100 N vertical
force.
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Model of free end bridge
force shift in case of 100 N
vertical force.
Radiology
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Dr. Gergely István
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Position of the glass
abutment within the
mandible.
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Bone structure
beneath the glass
abutment.
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Condition of the bone
structure at time of the first
investigation, 1 year after
oral implantation.
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Condition of the bone
structure at time of the first
investigation, 1 year after
oral implantation.
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Value of mandible‘s calcium
content immediately in front
of the glass abutment on the
left, at time of the second
investigation, 4 years after
oral implantation.
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Value of mandible‘s calcium
content under the glass
abutment on the left, at time
of the second investigation,
4 years after oral
implantation.
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Value of the mandible‘s
calcium content in front of
the glass abutment on the
right, at time of the second
investigation, 4 years after
oral implantation.
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Value of the mandible’s
calcium content under the
glass abutment on the right,
at time of the second
investigation, 4 years after
oral implantation.
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Description of the
employed ZX-27
Attractive Glass
Abutment System
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Glass abutment can be
purchased in two different
sizes „S“ and „L“ in six or
twelve pieces of shipment.
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Selection of status
corresponding glass sizes
and insertion into the
clamping apparatus
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Heating of the glass
abutment until it be red and
its outlines begin to deform.
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Heated and melted glass
abutment is pressed by
continuously increasing 0,8
N force into the marked
place. We wait until it is
solidified then put into
ceramic coooling coverlet.
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Polishing of the glass with
the help of diamond
processing equipment.
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Saddle-like accurate
adjustment of the glass
abutment to the plaster cast.
.
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Formation of wax cap on the
glass abutment with wax
immersion.
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Fixation of the glass
abutment onto the model
with hot cervical wax.
Cementation
The prepared work and the
glass abutment on the cast
before sticking.
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Prepared glass abutment
works on the cast.
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PRACTICAL
SAMPLES
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Patient No. 1
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Patient No. 1
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Patient No. 1
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Patient No. 1
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Patient No. 1
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Patient No. 1
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Patient No. 1
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Patient No. 1
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Patient No. 2
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Patient No. 2
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Patient No. 2
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Patient No. 2
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Patient No. 2
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Patient No. 2
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Patient No. 3
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Patient No. 3
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Patient No. 3
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Patient No. 3
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Patient No. 3
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Patient No. 4
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Patient No. 4
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Patient No. 4
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Patient No. 4
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Patient No. 4
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