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What does it feel like? Will I be asleep?
A lot of dental practices use terms such as "sleep dentistry" or "twilight sleep" when talking about IV sedation. This is confusing, because it suggests that IV sedation involves being put to sleep. In reality, you remain conscious during IV sedation. You will also be able to understand and respond to requests from your dentist.
However, you will not remember much about what went on because of two factors: firstly, in most people, IV sedation induces a state of deep relaxation and a feeling of not being bothered by what's going on. Secondly, the drugs used for IV sedation can produce either partial or full memory loss (amnesia) for the period of time when the drug first kicks in until it wears off.
Is it still necessary to be numbed with local anaesthetic?
The drugs which are usually used for IV sedation are not painkillers. While they relax you and make you forget what happens, you will still need to be numbed. If you have a fear of injections, you will not be numbed until the IV sedation has fully kicked in. If you have a phobia of needles, you will very probably be relaxed enough not to care by this stage. Your dentist will then wait until the local anaesthetic has taken effect (i. e. until you're numb) before starting on any procedure.
How is IV sedation administered?
Intravenous" means that the drug is put into a vein, either the arm or the back of your hand. Throughout the procedure, your pulse and oxygen levels are measured using a "pulse oximeter".
Anti-anxiety sedatives ("benzos"): Midazolam and Diazepam
Mostly the drug used for IV sedation is a short acting benzodiazepine, or "benzo" for short. This is an anti-anxiety sedative. IV administered benzos have 3 main effects: they reduce anxiety/relax you, they make you sleepy, and they produce partial or total amnesia
Midazolam is the first choice because of its relatively short duration of action (meaning that it'll be out of your system faster). Because there are differences between individuals in how much of the drug you need to be sedated, your response to the drug is monitored. Once the desired level of sedation is achieved, the drug is stopped.
Is it safe? Are there any contraindications?
IV sedation is EXTREMELY safe when carried out by a specially-trained dentist. This is why the General Dental Council allows specially trained Dentists to carry out this procedure
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