Jet Injector (Needle-less Injection) Advantages and Disadvantages

What is a disadvantage of the computer-controlled local anesthetic delivery systems (CCLAD) as mentioned in the text?

Measured dose
Nonthreatening
Overcomes tissue resistance
Easy to inject anesthetic too rapidly (correct)

What is a safety feature of the safety syringes mentioned in the text?

Require additional training
Accept prefilled dental cartridges
Minimize the risk of accidental needlestick injury (correct)
Do not have a sheath that locks over the needle

Which type of dental syringe is described as needing two hands for aspiration in the text?

Safety syringes
Disposable syringes (correct)
Computer-controlled local anesthetic delivery systems (CCLAD)
Original design syringes

What makes the original design syringes different from the computer-controlled local anesthetic delivery systems (CCLAD)?

Threatening nature (D) Signup and view all the answers

What characteristic is highlighted as an advantage of disposable syringes in the text?

Lightweight with better tactile sensation (D) Signup and view all the answers

Why is aspiration difficult with disposable syringes according to the text?

They require two hands (D) Signup and view all the answers

Why is birotational insertion technique recommended for minimizing needle deflection?

To rotate the handpiece or needle to create a greater angle of bevel with the long axis of the needle (B) Signup and view all the answers

What is a key advantage of using larger-gauge needles over smaller-gauge needles?

Less deflection as the needle advances through tissues (C) Signup and view all the answers

Why is it important not to insert needles all the way to their hubs unless necessary?

To reduce the risk of needle breakage (B) Signup and view all the answers

Which type of needle tip is more likely to deflect significantly during insertion?

Eccentrically situated beveled-point needle (B) Signup and view all the answers

How does the length of a dental needle affect deflection during injection?

Shorter needles have less deflection due to their size (C) Signup and view all the answers

What makes aspiration easier when using larger gauge needles?

Reducing deflection as the needle advances (B) Signup and view all the answers

Why is recapping of needles done with a needle-capping device when needles are reused for subsequent injections?

To prevent contamination of the needle and surrounding environment. (A) Signup and view all the answers

What is a common consequence of using a dull needle for dental injections?

Pain on initial penetration of the mucosa. (A) Signup and view all the answers

Why should needles not be bent if they are to be inserted into soft tissue to a depth greater than 5 mm?

To avoid damaging the tissue or causing discomfort to the patient. (A) Signup and view all the answers

What can cause pain on withdrawal of the needle from tissue?

Barbs on the tip of the needle. (B) Signup and view all the answers

Why should no attempt be made to change the direction of a needle while embedded in tissue?

To avoid damaging surrounding tissues. (A) Signup and view all the answers

What is a primary reason needles should not be forced against resistance during insertion?

Needles are not designed to penetrate bone. (D) Signup and view all the answers

What is the advantage of a JET INJECTOR (NEEDLE-LESS INJECTION) related to the piston?

It is scored to indicate the volume of local anesthetic administered (C) Signup and view all the answers

Why might a doctor accustomed to harpoon-type syringes feel insecure when using a JET INJECTOR?

The finger must be moved from the injection site (A) Signup and view all the answers

What is the purpose of a PRESSURE SYRINGE in dentistry?

To obtain mucosal anesthesia of the palate (C) Signup and view all the answers

What distinguishes DISPOSABLE SYRINGES used for intraoral injections?

They contain a Luer-Lok screw-on needle attachment with no aspirating tip (B) Signup and view all the answers

What makes PRESSURE SYRINGES inadequate for certain dental procedures?

Inadequate for regional block anesthesia (A) Signup and view all the answers

Why might a person with needle phobia prefer using a JET INJECTOR for local anesthetic?

Does not require aspiration (C) Signup and view all the answers

What does the presence of rust on a cartridge cap indicate?

At least one cartridge in the container has broken or leaked (B) Signup and view all the answers

What is the cause of leakage during injection?

Improper preparation of the cartridge and needle, resulting in an ovoid and eccentric needle puncture (D) Signup and view all the answers

Which of the following is NOT a recommendation for the proper use of dental cartridges?

Cartridges should be warmed before use (B) Signup and view all the answers

What is the function of a topical antiseptic in the local anesthetic armamentarium?

To produce a transient decrease in bacterial population at the injection site (D) Signup and view all the answers

Which of the following is NOT a component of the local anesthetic armamentarium?

Needle-recapping device (D) Signup and view all the answers

What is the purpose of using a needle-recapping device?

To prevent accidental needle sticks during recapping (D) Signup and view all the answers