5. the Armamentarium of Local anesthesia.ppt

5. the Armamentarium of Local anesthesia.ppt

1. 1
Dr. Alex Asmamaw
Mail id [email protected]
Local Anesthesia
5-The Armamentarium

2. 2
Dr. Alex Asmamaw Mail id
[email protected]
Introduction
In this chapter equipments for la will be discussed mainly the types
of syringes and its parts and proper handling
An increased needle stick injury and other complications has led to
the development of safety syringes

3. 3
Dr. Alex Asmamaw Mail id
[email protected]
Learner Objectives
Upon completion of this presentation, participants will be
able to:
Know Types of dental syringe
State the 3 parts dental syringe.
Discuss proper handling of equipments.
complications
Permission on ile from IStock

4. The dental syringe
The dental syringe should have certain criteria:
Durable and withstands sterilization
Accepts a variety of cartridges and needles
Provide effective aspiration
Inexpensive , lightweight and simple to use.

5. Barrel
Thumb ring
Piston
Finger grip
Needle head adapter
Claws or harpoon

6. 6
Syringes:
1.non disposable syringes:
a . Breech-loading, metallic, cartridge-type, aspirating
a.Breech-loading , plastic , cartridge-type,aspirating
b.Breech-loading, metallic , cartridge type, selfaspirating
c.Pressure syringe forPDL
d.Jet injection (needle-lesssyringe)
1.Disposablesyringes
2.SafetySyringes
3.Computer controlled LA deliverysystems.

7. Aspirating and non-aspirating types

8. Breech or side loading
Top loading

9. Self aspirating dental syringe

11. Jet injectors
This is a new method of injecting local anesthetic solution without
using a dental needle ( needless injection).
Using this device, the release of a mechanically activated spring forces
0.05 -0.2 ml of solution under high pressure through a very small
orifice into the mucosa.
This syringe is used for mucosal injections to reduce pain before the
injection of local anesthetic solution using the conventional dental
syringe.

12. Jet injector

13. The periodontal ligament injection syringe

14. Computer controlled L.A. Delivery System
(CCLAD system)

15. Disposable plastic syringe
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16. Insulin syringes
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17. Care and handling
Wash, clean and sterilize.
Dismantle after 5 autoclaving's and lubricate.
Clean harpoon or tip every time.
Replace harpoons or claws after prolonged use.
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18. The cartridge
Name of anesthetic agent and v.c.
Concentration of anesthetic agent and v.c.
Name of preservative.
Volume of solution.
Supplier.
Expiry date.
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19. Cartridg
e:
•Cylindrical glass
tube
•Stopper
(plunger,bung)
•Aluminiumcap
•diaphragm
19

20. Care and handling
Usually come in vaccum sealed tin containers or boxes containing
blister packs.
Sterilization after opening is not warranted.
No autoclaving.

21. Problems
Leakage during injection
Broken cartridge.
Bent harpoon.
Disengagement of the harpoon or claw from plunger.
Surface deposits.

22. Needle
:
For injection delivery
devices [e.g., syringes and
pen needles (PNs)],
important contributors
include needle diameter
(gauge), needle length,
needle smoothness, and
lubrication.Additionally,
sharpness or
bluntness of a needle
directly affects pain.
22

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24. 24

25. Important note: under no
circumstances should any needle or
cartridge be used on more than one
patient.

26. Dental needle
Tip with bevel
Shaft or shank
Hub
Syringe adapter
Cartridge
penetrating end

27. Currently used dental needles are strong, flexible, sharp ended,
sterile and to be used on a single patient only.
Reduced pain and ease of needle insertion into the tissue is
owned to the sharpness of needle tip and cutting bevel.
Designs of needle bevel include short, long, multibeveled.
Dental needles are also treated with an antifriction substance to
enhance insertion.

28. Sharpness of needle may be lost from:
The manufacture
Multiple injections
Forcible bone contact on needle insertion.
Passing the needle shaft along a piece of sterile
gauze helps to identify any barb at the end of
needle tip.
Never insert the needle to the hub:
Most weakest point of needle is at the
junction of shaft and plastic hub
If it fractures it will then be difficult to
retrieve.

29. Types
of dental needle
Length
Short(10-25mm)
Long(25-40mm)
Gauge
This refers to
the diameter
of needle lumen
(internal diameter)
25,27,30.

31. Gauge of dental needle
Number
25
27
30
Outside diameter (mm)
0.5
0.4
0.3
Internal diameter (mm)
0.25
0.20
0.15

32. Infiltration techniques
Short
Gauge 30
Block injection techniques
Long
Gauge 27
Reduce fracture incidence
provides good aspiration
less deflection on needle insertion
Needle selection

33. Care and handling
Always use only on one patient.
Discard after 3-4 penetrations.
Cover when not used.
Always be ware of position of needle.
Properly dispose of.

34. Problems
Pain on needle insertion.
Breakage.
Pain on needle withdraw from tissue.
Injury to patient or dentist.

35. 35
additional
armamentarium:
•Topical
antiseptic
•Topical
anesthesic
•Application
sticks
•Cotton guage
(2×2)
•hemostat

36. Thank You