intraosseous anesthesia delivery system


What is Intraosseous Anesthesia?

The technique of intraosseous anesthesia is one whereby teeth are anesthetized by injecting local anesthetic solution directly into the cancellous bone spaces around the tooth. In order to reach the cancellous bone from the outside it is necessary to pass through four tissue layers; epithelium, connective tissue, periosteum and cortical bone. The outer three layers, which comprise the attached gingiva, contain sensory innervation but can easily be anesthetized with a small injection of local anesthetic solution. The fourth layer, cortical bone, does NOT have sensory innervation and can be perforated painlessly using a rotary instrument.

The technique of Intraosseous Anesthesia therefore consists of three essential steps:

1. Anesthetizing the attached gingiva

2. Perforating the cortical
    plate of bone

3. Injecting anesthetic into the     cancellous bone space around the     tooth

Advantages for the Clinician

• When anesthetic solution is delivered into cancellous bone, excellent pulpal anesthesia is obtained, even in patients with irreversible pulpitis or hypersensitive teeth.

• Intraosseous Anesthesia saves valuable time because there is no delay between injection and effect. Work on the tooth can commence in less than 30 seconds after the injection.

• The Clinician will find patients to be very appreciative of the absence of pain and numbness.

Advantages for the patient 

• The patient experiences minimal pain during the dental procedure itself, and on leaving the dental office there will be no balooning of soft tissues and a much lessened feeling of numbness.

• If an extraction is required, the patient is often spared the need for an unpleasant palatal injection.

• Postoperative pain is rare.

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