Introduction
Most of the patients visit a dentist with some complaints of pain, discomfort, or swelling. An efficient dentist must have the skills, knowledge, and tools to address the concerns appropriately. As technology and medical science advance, newer methods and devices to manage pain evolve each day. Dentists often rely on pharmacological and non-pharmacological approaches for pain control. Approaches based on pharmacology approaches include the use of drugs like non-steroidal anti-inflammatory drugs, corticosteroids, and muscle relaxants to control pain. Non-pharmacological control methods like behavior control are mainly adopted in pediatric patients. This article deals with how anesthesia is used in dentistry.
What Is Dental Anesthesia?
Whenever some surgical procedures or procedures can cause discomfort, such as severe sensitivity, to the patient, some kind of dental anesthesia would be preferred. It is usually delivered by the dentists themselves. In some cases, a dental hygienist or a dental anesthesiologist, who prepares the patient for the procedure, takes care of the need. Drugs used for anesthesia are meant to numb the area so that the treatment goes on smoothly without interruption or discomfort to the patient. The numbness usually stays for about two hours or more, which gives the dentist ample time to complete the procedure. The patient is usually awake during the entire procedure (unless sedation anesthesia or general anesthesia is preferred in some difficult cases) but does not have any discomfort or pain during the treatment.
How Did Dental Anesthesia Evolve?
The credit for using anesthesia in dentistry is bestowed upon Horace Wells (1844) and William T. G. Morton (1846) when they first used nitrous oxide and diethyl ether, respectively, to miraculously control pain in their surgeries. Dr.Morton had used it initially for a patient related to the chief of surgery, Dr. Warren, who was the dean at the Harvard Medical School and one of the primary founders of the New England Journal of Medicine and Surgery. It was customary to hear the wailing screams of patients in pain during those times. On the other hand, Dr.Warren was surprised that Dr.Morton kept his patient asleep during the entire procedure. Dr.Warren was impressed by the discovery and made it available to doctors across the globe. Dentists and other healthcare professionals judiciously use this technique for pain control in their practice. With the advancement of science and technology, newer approaches to pain management are developed each day.
How Long Does It Take for Dental Anesthesia to Wear Off?
The duration and intensity of dental anesthesia depend on many factors. In general, it is found to last within one to four hours. However, it can vary from patient to patient, depending on their metabolism, how complex the procedure is, the type of anesthetic drug used, the mechanism of action of the anesthetic agent, the type of dental needle used, etc. The route of administration or the way the drug is delivered into the body, like intravenous, oral, etc., can also influence its duration.
What Are the Types of Dental Anesthesia?
There are many types of anesthesia used in dentistry. It depends on the type of procedure, its duration, the metabolism, and the pain threshold (ability to withstand pain) of the patient Other factors to be considered include the general health of the patient, and whether the patient has had any allergic reaction to dental anesthesia.There are three main types of anesthesia used in dentistry, which include:
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Local Anesthesia: These are commonly used for simpler procedures like removing a tooth, preparing a tooth for placing a crown, etc. It numbs only the required area while the patient is active and aware of what happens around them. They will not have any pain or discomfort as the area of interest becomes numb. Most local anesthetics are fast-acting and take about ten minutes to take effect. This can last to a minimum of an hour. However, the duration can vary from person to person. Some anesthetic agents contain vasopressors like epinephrine, which help them to last long and prevent the spread to other parts of the body. Local anesthetics are available in different forms like gel, ointment, cream, spray, patch, liquid, and injections. Articaine, Bupivacaine, Prilocaine, Mepivacaine, and Lidocaine are some examples of commonly used local anesthetics.
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Sedation: Medicines that can keep the patient relaxed are used in this type of anesthesia. There are various levels of sedation: minimal, moderate, or deep. Deep sedation is also called monitored anesthesia care (MAC), where the patient might not be aware of their surroundings. They might respond only to repeated stimuli or pain. The anesthesia can be given through inhalation, oral anesthesia, or intravenously. It can cause procedure amnesia (inability to remember what was done).
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General Anesthesia: This is commonly used for very long procedures, cases where the patient is very anxious and does not cooperate with the procedure. Due to the effect of this type of dental anesthesia, the patient will not be conscious, and will not have any pain. Their muscles will be relaxed and will take time to return from anesthesia. In some cases, very rarely, they might have some complications of general anesthesia.
What Are the Side Effects of Dental Anesthesia?
The long-term effects of dental anesthesia depend on many factors: the drug of choice, drug interactions, the overall health of the patient, the route of administration, the site of injection of the dental anesthesia, etc. Studies show that general anesthesia has more side effects when compared to local anesthesia or sedation. Individual factors like allergies to anesthetic agents can also have an impact on dental anesthesia. The vasopressors added to increase the efficiency of the anesthetic agent can cause heart and blood vessel complications in some cases. The commonly seen adverse reactions include:
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Nausea.
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Vomiting.
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Headache.
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Confusion.
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Sweating.
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Shivering.
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Dizziness.
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Tiredness.
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Slurred speech.
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Dry mouth.
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Pain at the site of injection.
What Are the Recent Trends in Dental Anesthesia?
Aspirating syringes are the most common mode of delivery of anesthesia in dentistry. Research is ongoing to find an alternative that can help to reduce painful injections and reduce side effects due to a dental needle. One of the recent advances includes vibrotactile devices, which use the gate control theory. According to this theory, the perception of pain can be reduced by activating the nerve fiber through vibration. Small attachments called VibraJects can be attached to the syringe, which helps to deliver a small vibration that can be felt by the patient. Research is ongoing on its use and efficacy. DentalVibe is another battery-operated device that uses the same principle. It produces micro-oscillations that stimulate the sensory nerve fibers, reducing the sensation of pain. Computer-controlled local anesthesia delivery systems are another latest invention that uses a computer to control the delivery of the local anesthetic through a syringe needle.
Conclusion
Pain control is one of the most important aspects that can affect the efficiency of dental procedures. It can also be a cause of stress and anxiety in patients. Open communication between the patient and healthcare professional can wave off any fear, and help the patient proceed with the treatment. The recent advances in dental anesthesia have made the delivery of anesthetic drugs a cakewalk.
