Different techniques for upper and lower jaw
When a local anaesthetic is applied to the upper jaw, it is localised to the teeth due to receive treatment. This is because the nerves run close to the bone. With the lower jaw, the anaesthetic has to be applied to the side of the jaw that is receiving treatment. The anaesthetic is administered via an opening in the jawbone behind the molars known as the mandibular foramen as elsewhere the nerve is located deep inside the jaw bone. This is known as a conduction anaesthesia. With a conduction anaesthesia, the entire half of the lower jaw is numbed. The tongue and lip will also be affected.
Topical anaesthetic
A topical anaesthetic is administered as a gel or spray. It is often used for young children as it helps to alleviate the discomfort associated with the insertion of the needle to administer the local anaesthetic.
Side effects
Side effects from anaesthesia are rare. Some people may develop allergic reactions. The anaesthetic agents contain sulphites, which are so-called vasoconstrictors; they cause blood vessels to narrow. If you have a sulphite allergy, it is possible to use analgesia that does not contain sulphites.
People who suffer from a fear or phobia of dentists may feel anxious, lightheaded or even faint at the prospect of analgesia being administered to them. If you are feeling fearful, it’s a good idea to talk to your doctor in advance.
