Before any surgical procedure, including wisdom tooth extraction, blood tests are an extremely important step. After extraction, wisdom teeth can easily become infected or remain swollen and painful if not properly cared for. Therefore, there are several important precautions to ensure the procedure is as safe as possible and recovery goes smoothly.

1. What Are Wisdom Teeth?

Wisdom teeth are the third molars located at the very back of the dental arch. They usually erupt from the age of 16 onward and have limited chewing function. As they emerge, they often cause pain, discomfort, and may lead to dangerous complications. Therefore, impacted or misaligned wisdom teeth are generally recommended for extraction.

2. Is a Blood Test Necessary Before Wisdom Tooth Extraction?

Blood tests before extraction are performed to ensure there are no abnormalities in blood clotting or blood cell counts, helping to ensure proper healing after surgery.

Patients should be informed about the importance and necessity of these tests to help prevent prolonged bleeding, delayed wound healing, and complications such as persistent infection after surgery.

*Blood clotting tests before wisdom tooth extraction*

3. Wisdom Tooth Extraction Procedure

3.1 Examination

You should visit a dentist as soon as you experience pain or discomfort in the gum area at the back of the jaw. Early examination helps monitor the eruption of wisdom teeth and allows timely treatment to avoid serious complications.

Dental examination is very important because only after understanding the tooth position and the patient’s overall health can the dentist determine whether extraction is necessary.

Therefore, if a dentist recommends extraction without conducting a proper examination, you should consider choosing another, more reputable dental clinic for a thorough consultation.

To determine the exact position and direction of the wisdom tooth, the dentist will perform an examination and take dental X-rays. Based on the results, an appropriate treatment plan will be provided to ensure the extraction is carried out safely.

After the X-ray, blood tests are required to evaluate blood clotting ability and determine whether the patient is suitable for minor oral surgery. Finally, the dentist will assess oral health and treat any infections or inflammation if necessary.

However, wisdom tooth extraction is closely related to anatomical structures such as the maxillary sinus and nerves, making it unsuitable for some specialized surgical approaches. Therefore, patients with systemic diseases such as cardiovascular disease, diabetes, or blood clotting disorders may be advised to keep the wisdom tooth. To avoid postoperative complications, patients should clearly inform the dentist about their medical history and current health condition.

*Dental examination before wisdom tooth extraction*

3.2 Tooth Extraction

On the day of extraction, the dentist will examine the patient once again to ensure both general and oral health conditions are suitable for surgery.

Steps of Wisdom Tooth Extraction

- Step 1: Local Anesthesia

Wisdom tooth extraction is considered a minor surgery, so general anesthesia is usually unnecessary. Local anesthesia is administered to minimize pain. After approximately 1–1.5 hours, when the anesthetic wears off, mild pain or discomfort may occur at the extraction site.

- Step 2: Tooth Removal

The gum tissue may need to be incised to expose the crown and roots of the wisdom tooth. In cases of severely impacted or tilted wisdom teeth, a dental drill may be used to section the tooth into smaller parts for easier removal while minimizing damage to the jawbone and adjacent teeth.

The extraction time depends on the tooth’s position and eruption angle. On average, each tooth takes about 15–30 minutes to remove, although some complicated cases may take several hours.

*Impacted wisdom tooth extraction*

4. Important Notes for Wisdom Tooth Extraction

4.1 Before Extraction

Patients should be in good general health, meaning systemic conditions related to surgery should either be absent or well controlled. Patients with conditions such as high blood pressure, blood clotting disorders, diabetes, or cardiovascular disease may need to take dental medications before, during, and after extraction.

Provide detailed information about chronic diseases such as gastritis, hypertension, cardiovascular disease, musculoskeletal disorders, and all medications currently being used, including anticoagulants, antibiotics, pain relievers, and drugs that may cause allergies.

It is important to minimize bacteria in the oral cavity by:

* Ensuring there is no infection or pain caused by bacterial inflammation in the mouth or around the tooth planned for extraction;
* Filling all cavities to eliminate potential bacterial reservoirs in the mouth;
* Removing tartar and thoroughly treating gingivitis before extraction. If the tooth to be extracted is still painful (especially wisdom teeth), the infection should be treated first until the pain subsides, because inflammation around the tooth may reduce the effectiveness of local anesthesia during extraction;
* Taking prescribed dental antibiotics one or two days before extraction to enhance antibacterial protection throughout the body.

*Patients with cardiovascular disease should inform their dentist beforehand.*

Dental X-rays of the extraction area should be taken to assess the shape of the tooth, the number of roots, and the condition of the surrounding bone.

Timing of Extraction

It is recommended to have the tooth extracted early in the morning or early in the afternoon so there is enough time to monitor and control bleeding after the procedure.

Patients should eat a full meal before tooth extraction.

Women should avoid tooth extraction during pregnancy, breastfeeding, and menstruation.

4.2 After Extraction

Important care instructions after wisdom tooth extraction include:

* Bite firmly on the gauze for about 20 minutes until bleeding stops. However, do not keep the gauze in the mouth for too long, as it may absorb plasma from the wound and delay healing;
* Apply an ice pack to the outside of the cheek immediately after extraction to reduce swelling. Ice should be applied during the first day after extraction and only when there is significant pain or swelling;
* Maintain good oral hygiene 24–48 hours after extraction. Rinse with a specialized antiseptic mouthwash;
* Take medications exactly as prescribed by the dentist;
* Eat soft, easy-to-swallow foods;
* Avoid vigorous rinsing, repeated mouth washing, or brushing your teeth within 24 hours after surgery to prevent dislodging the blood clot;
* Do not touch the extraction site with your fingers or tongue, as this may cause further bleeding and infection;
* Get adequate rest and avoid heavy physical activities that may overstrain the body;
* Avoid alcohol, beer, carbonated soft drinks, and smoking for at least 24 hours after extraction;
* Do not apply ice or cold water directly onto the extraction wound;
* Avoid holding salt water or mouthwash in the mouth and avoid spitting after extraction;
* Do not chew gum, eat hard candy, spicy foods, or foods that are too hot or too cold;
* Avoid strong impacts or pressure on the oral cavity.