Dentistry Injection Techniques Overview

The needle is positioned along the long axis of the tooth root, with the bevel facing towards the root.

The syringe is advanced towards the tooth root until resistance is felt.

0.2 mL of local anesthetic solution is deposited into the periodontal ligament.

The volume of anesthetic administered is gauged by the thickness of the rubber stopper in a conventional syringe or by the number of squeezes on a PDL syringe.

The syringe is removed from the tissue and the needle capped after the anesthetic is deposited.

Dental treatment can be started 30 seconds after the PDL injection.

Adjusting the angle of the needle by bending it, especially for injections on distal aspects of second and third molars.

The patient’s position during PDL injection, either supine or semi-supine, with the head turned to maximize access and visibility.

The rubber stopper in a local anesthetic cartridge is equal to 0.2 mL of solution.

Each squeeze of the 'trigger' on a PDL syringe delivers 0.2 mL of local anesthetic.

Two indicators show if the injection was successfully placed.

The feeling of numbness, or anesthesia, reaching the target area.

The patient experiencing the expected loss of feeling in specific areas.

If the tooth has multiple roots, carefully remove the injection needle and repeat the procedure on each root.

It is important to carefully remove the needle to avoid damaging surrounding tissues.

The volume of anesthetic used should be considered to be effective but avoid overdosing the patient.

The difficulty encountered when injecting local anesthetic solution into the periodontal ligament, often due to dense tissue.

Paleness or lack of blood flow in the tissues near the injection site, indicating successful anesthetic delivery.

A critical sign of successful PDL injection, suggesting the anesthetic solution has reached the desired location.

A key indicator of proper PDL injection, suggesting the anesthetic has reached the desired location and an adequate level of anesthesia is likely.

The injection technique used for anesthetizing the periodontal ligament, targeting the space between the tooth root and the bone.

The area that is targeted by the PDL injection, located between the tooth root and the bone.

The inability of anesthetic solution to flow back into the mouth after injection, confirming proper delivery and placement in the periodontal ligament.

A sign that the PDL injection has been successful, with the anesthetic taking effect as expected.

A method of delivering local anesthetic solution directly into the periodontal ligament (PDL) space surrounding the tooth root.

A PDL injection is most commonly used when conventional infiltration or block injections are ineffective or contraindicated, such as when significant resistance occurs during a traditional injection, or in cases of infection or inflammation.

Injecting the anesthetic solution too rapidly can cause pain and discomfort.

The needle tip should be maintained against the tooth structure to prevent inadvertent soft tissue penetration.

Inflammation of the surrounding tissues can make PDL injections more painful.

The duration of anesthesia achieved with a PDL injection varies greatly, and is not always predictable.

A PDL injection is not contraindicated in the presence of apical disease, but its effectiveness might be limited.

Ensure that the anesthetic solution is retained in the tissues by using a slow injection rate and avoiding excessive volume.

This injection technique is suitable for treating multiple quadrants in one appointment because it only anesthetizes the specific tooth and surrounding tissues, not the larger areas like a nerve block would.

Injecting too quickly or forcefully into the PDL space may break the cartridge and cause a painful experience for the patient.

This injection technique is particularly useful when dealing with a patient's fear of needles or a patient with a limited pain tolerance.

Because the injection is directed into the periodontal ligament, there is a small risk of damage to the ligament and potentially dislodging the tooth.

This injection technique is commonly used for single-tooth treatments and multiple-quadrant procedures in both children and adults.

The needle should be inserted into the gingival sulcus, aiming for the periodontal space, where the tooth's root meets the bone.

The injection should be administered slowly and carefully to avoid tissue damage and discomfort to the patient.

The success rate of infiltration anesthesia in the mandibular molar region using articaine tends to be high.

A dental injection technique directly into the pulp chamber or root canal of a tooth, targeting the terminal nerve endings for pain control during endodontic procedures.

The intrapulpal injection is primarily indicated when conventional anesthetic techniques fail to provide adequate pain control during endodontic procedures like pulpal extirpation.

One of the benefits of the intrapulpal injection is the minimal volume of anesthetic needed, leading to a faster onset of action and reduced risk of complications.

One disadvantage of intrapulpal injection is the brief period of pain experienced during the injection due to the needle entering the sensitive pulp tissue.

During intrapulpal injection, a small opening is required in the pulp chamber for optimal effectiveness. However, extensive decay can hinder successful application.

A 25- or 27-gauge short or long needle is used to deposit the anesthetic solution into the exposed pulp chamber or root canal.

The needle should ideally wedge firmly into the pulp chamber or root canal for optimal effectiveness. However, if the needle doesn't fit snugly, the anesthetic can still be deposited within the chamber.

Resistance is felt during intrapulpal injection as the anesthetic is deposited under pressure. This resistance indicates successful delivery of the anesthetic into the pulp tissue.