31. Parts and parameters of the syringe and the needle, used in dentistry. Flashcards

1
Q
  1. Parts of the syringe
    a/ Identify these parts
A

1/ Cylinder/barrel –calibrated: 2 ml (3,5,10) content, 1/10 scale
2/ plunger –hermetically closes the cylinder
3/ Conus –2 types: record & luer
4/ Barrel flange
5/ Plunger flange

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2
Q
  1. Parts of the syringe
    2/ What type of syringe is most commonly used?
A

2 mL syringe

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3
Q
  1. What are the 3 parts of needle?
A
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4
Q
  1. Parts of the needle
    b/ The role of the olive?
A

Olive: surface prepared sloped, the two sides form edges that meet in a pinpoint. Chiseling angle: 12- 15%. In the middle of the surface the lumen can be found.

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5
Q
  1. What are the types of needles used in dental anaesthesia
A

*Record needle –metal manubrium
*modern disposable needles –plastic manubrium that fits the conus (friction)
*Carpule: invented by Harvey Cook in 1917 nowadays becoming more popular

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6
Q
  1. How do we use a syringe such as SecureGuard?
A

1/ After injection, the plunger connects with the needle and is manually retracted into the barrel to prevent needle stick injury
2/ Upon full retraction, the plunger is broken off to prevent re-use

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7
Q
  1. What are the parts of the Carpule system?
A

Parts:
*ampule –contains the sterile solution
*piston lock
*needle –sharp on both sides

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7
Q
  1. What are the parts of the Carpule system?
A

Parts:
*ampule –contains the sterile solution
*piston lock
*needle –sharp on both sides
(In the beginning there were sterilization problems, but at the end of the decade the disposable systems appeared (expensive).)

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8
Q
  1. What are Parameters of dental needles?
A

1/ diameter: 0,45 –0,5 mm (26G, 27G)

2/ length
+) 25 mm (short needle)
+) 42 mm (long needle)

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