3. Purpose of Gingival Retraction
3
• To record the unprepared tooth structure
immediately adjacent to the margins.
• Control of moisture and to obtain a dry
field of operation.
• To displace the gingiva apically and
laterally.
• To record the subgingival finish line
12. SELECTING CORD SIZE
Retraction cords.. Why? When?
How?
1.The single-cord technique --smallest diameter (no.
000 or 00).
2.The selective double-cord technique --a cord of equal
or greater diameter (no. 0, 1, or 2)
3.The double-cord technique requires the insertion of
the second cord of equal or greater diameter (no. 0, 1,
or 2)
13. classification of cords materials
DEPENDING UPON THE MAKE
are made of various textile blends of wool, silk,
cotton, and synthetic fibers, which are
Depending on the configuration Twisted/ Knitted, Plain
Twisted,--two or three threads twisted together.
knitted together-- knitted cords are knitted together
without a central thread
Braided, --woven so tightly that it is impossible to
separate the threads. -.
13
14. Depending on the chemical treatment
Plain OR Impregnated
Depending on surface finish
waxed /unwaxed
Depending on number strands
Single Double-string
Cords also can be distinguished as either
soft or compact.
14
15. 15
the size and number of retraction cords should be modified
according to the osseous crest position and tissue biotype.
16. HANDS ON COURSE: TOOTH PREPARATION,
GINGIVAL RETRACTION,
IMPRESSION MAKING,
PROVISIONALISATION.
Fischer packing instrument or a De plastic instrument.
24. Electrosurgery
24
• Definition: Harri’s defines it as the use of specially
designed electronic equipment that produces a limited
variety of high frequency wave forms for the purposes of
cutting or removing soft tissue.
Mechanism of action
• Oringer states that heat generated by the resistance of
soft tissue to the passage of high frequency electrical
energy causes molecular disintegration of cells in the line of
surgical incision.
• It uses radio currents in the range of 1.5 to 7.5 million
cycles/sec.
.
25. 25
T1 Diamond shaped electrode
T2 Small loop electrode
T3 Large loop electrode
T4 Fine wire electrode
T5 Heavy wire electrode
T7 Fine oval electrode
T9 Heavy ball electrode
26. Important facts
Important facts to be taken into consideration:
Contraindicated in patients with pacemaker or delayed
healing because of debilitating disease or radiation
therapy.
Not suitable on thin attached gingiva.
Should not be used with metal instruments
26
31. Expasyl
Aluminum Chloride - 15%-- causes hemoostasis
Kaolin—provides consistency to the paste
Water—acts as vehicle
Adv---Features & Benefits:
Top-quality opening and efficient drying
Preserves the epithelial attachment and gum line.
No bleeding. No recession. No pain.
Fast, simple and cost-affordable protocol.
Expert guarantee.
Time and money saving saving
34. 34
0 min*
2 min*
Foaming action
complete
5 min*
Material completely cured
Total Expansion = 160 %
35. 35
This 1:1 vinyl polysiloxane material is designed to
gently retract the gingiva, controlling bleeding and fluid
flow.
15% aluminum sulfate in GingiTrac constricts the
capillaries to stop bleeding and the bite pressure
provided by GingiCap™ compression caps displaces
unwanted crevicular fluids, resulting in a dry sulcus and
clear sharp margins.
GingiTrac
vinyl polysiloxane material with
aluminium sulfate astringent
52. Tips for making a good impression
Selection of tray
Manipulation of the material
Loading the tray
Orienting the tray
Holding the tray
Removal of the tray
Making the Space for light body
Inspection.
53. Conclusion
53
Choice of appropriate gingival retraction system is still a
dilemma for the operator.
Moreover, a particular clinical situation may indicate the
specific technique.
Hence the type of gingival retraction to be employed
should be thoroughly thought over before using, keeping
in mind the gingival tissue health and comfort of both
patient and the practitioners.
