Q&A with Top Doctors

Is getting a porcelain crown painful?

In general, the process of getting a porcelain crown usually does not cause significant pain, although individual experiences may vary depending on the treatment phase, individual sensitivity, and the dentist's technique.

During the tooth preparation phase, local anesthesia is administered to ensure the procedure is pain-free. Some patients may experience mild discomfort due to insufficient anesthesia or sensitive pulp, but this is generally tolerable. The dentist will grind down part of the tooth structure to create space for the porcelain crown. During the impression-taking and temporary crown placement phase, there is usually no pain, although the temporary crown might cause brief discomfort due to marginal discrepancies or occlusal issues. During the porcelain crown try-in and cementation phase, brief sensitivity or discomfort might occur if the crown margins or occlusion have high spots, which the dentist will promptly adjust. Generally, there is no pain, although the cement may cause slight irritation to the gums.

If the tooth itself has pulpitis or pulp sensitivity, pain might occur during the grinding process due to irritation of the pulp. In such cases, the dentist may need to perform root canal treatment first, before proceeding with the porcelain crown restoration once the inflammation has subsided. If the porcelain crown has ill-fitting or overextended margins, it may irritate the gums, causing pain or inflammation, in which case the dentist will adjust or remake the crown. If pain persists or worsens, it may be caused by dental inflammation, pulpitis, or other issues, and prompt dental consultation and professional treatment are necessary. Additionally, maintaining good oral hygiene and undergoing regular dental checkups are key to minimizing discomfort.

Please note that individual health conditions and sensitivity vary, so experiences may differ. If you have any concerns regarding porcelain crowns or other dental restoration procedures, it is advisable to consult a qualified dentist, who can provide personalized advice and answer all your questions.

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Dr. Liu Chao
May 24, 2025
Is a dental crown necessary after root canal treatment?

In most cases, a dental crown is recommended after root canal treatment, but it is not absolutely mandatory.

During root canal treatment, the pulp, including blood vessels, nerves, and connective tissue, is removed. After losing its nutrient supply, the tooth gradually becomes brittle and darker in color. Pressure during chewing may cause the tooth to fracture. Root canal treatment often involves removal of part of the dental tissue, and the remaining tooth structure may be insufficient for normal chewing. A dental crown can restore the occlusal height, proximal contact, and chewing efficiency.

For anterior teeth, direct filling after root canal treatment might significantly compromise aesthetics due to color differences between the restorative material and natural teeth. A crown can mimic the natural color of teeth and improve appearance. The marginal adaptation of restorative materials to the tooth structure is limited, and microleakage may occur during long-term chewing, potentially allowing bacterial ingress into the root canal and causing secondary infection. A crown completely encases the tooth with bonding agents, providing better sealing and reducing the risk of recurrence.

However, whether a crown is necessary depends on the individual patient's condition and the extent of tooth damage. If the tooth defect is small and does not affect chewing function, a crown may not be necessary. Patients are advised to communicate fully with their dentist after root canal treatment to understand their dental condition and jointly determine the appropriate subsequent treatment plan.

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Dr. Liu Chao
May 24, 2025
Can gastritis heal on its own?

In general, acute gastritis often resolves spontaneously, but timely intervention is necessary; chronic gastritis can be managed and partially relieved in some types, but requires long-term management.

Acute gastritis is an inflammation of the gastric mucosa caused by acute irritants such as improper diet, excessive alcohol consumption, medications, and infections. Mild cases of acute gastritis usually can resolve spontaneously, with timely dietary adjustments such as avoiding irritating foods and switching to bland liquids like rice soup and porridge, discontinuation of excessive alcohol consumption or medication abuse, and ensuring adequate rest. Moderate to severe acute gastritis cannot resolve spontaneously and requires immediate medical attention. It may necessitate drug treatment and intravenous fluid replacement to restore electrolytes. Delayed treatment may lead to complications such as gastric ulcers, gastric perforation, or progression to chronic gastritis.

Chronic gastritis is a chronic inflammation of the gastric mucosa. Common causes include Helicobacter pylori infection, long-term irregular eating habits, bile reflux, and autoimmune disorders. Non-atrophic gastritis requires standardized treatment, such as quadruple therapy to eradicate H. pylori, because without proper treatment it tends to recur frequently and cannot resolve spontaneously. If left untreated for a long time, it may progress to atrophic gastritis or intestinal metaplasia, increasing the risk of gastric cancer. Atrophic gastritis cannot be completely reversed naturally, as it represents structural damage to the gastric mucosa. Lifelong management is required, and progression can be delayed through medication and dietary adjustments; mild atrophy may be partially reversible.

Regardless of the type of gastritis, once symptoms appear, such as upper abdominal pain, nausea, vomiting, or indigestion, prompt medical consultation is necessary. Diagnosis should be confirmed through endoscopy, and treatment should follow medical advice rather than relying on spontaneous resolution, to avoid disease progression or complications. Additionally, patients with gastritis should maintain dietary hygiene, avoid spicy, greasy, excessively cold or hot foods, quit smoking, limit alcohol consumption, and maintain regular lifestyle habits to aid recovery and prevent recurrence.

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Dr. Shen Yonghua
May 24, 2025
What does a gastroenterology examination involve?

Gastroenterology primarily examines the function and structure of the gastrointestinal tract. Common diagnostic procedures include gastroscopy, colonoscopy, abdominal ultrasound, CT scans, MRI scans, blood tests, and stool tests. Gastroscopy allows direct visualization of the gastric mucosa, enabling detection of lesions such as ulcers, inflammation, and tumors. Colonoscopy is used to examine the interior of the colon and rectum, identifying abnormalities such as polyps, inflammation, and bleeding. Abdominal ultrasound evaluates the shape and structure of organs such as the liver, gallbladder, pancreas, and spleen. CT and MRI scans provide more detailed imaging information, aiding in the diagnosis of complex digestive system diseases. Blood tests can assess indicators such as liver function, kidney function, and electrolyte levels to evaluate overall health. Stool tests can detect infections, bleeding, or the presence of parasites.

If you are planning to undergo gastroenterological examinations, it is recommended to fast beforehand, typically refraining from food and drink for at least 8 hours prior to the test. Inform your doctor about all medications you are currently taking, including prescription drugs, over-the-counter medications, and supplements, so the doctor can determine whether any should be temporarily discontinued. Wear loose and comfortable clothing to facilitate the examination. If you have any pre-existing medical conditions or allergies, be sure to inform your doctor. It is also advisable to have a family member accompany you on the day of the examination to provide necessary assistance afterward.

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Dr. Shen Yonghua
May 24, 2025
Benefits of Girls Eating Fatty Meat

Girls can gain some health benefits from moderate consumption of fatty meat.

Fatty meat is a high-energy food, and for women who engage in heavy physical labor or high-intensity exercise, moderate intake can provide necessary energy. The cholesterol in fatty meat is converted into vitamin D3 in the body, which helps maintain bone health and prevent osteoporosis.

Fatty meat contains B-complex vitamins, vitamin D, and minerals such as iron and zinc. These nutrients play important roles in maintaining overall health, promoting bone health, and supporting blood formation. Dietary fat enhances food palatability and satiety, helping control appetite and prevent overeating.

Although fatty meat has its benefits, excessive consumption is not recommended. Due to its high fat and calorie content, excessive intake may lead to obesity and other health problems. Women are advised to enjoy its benefits while also monitoring their intake to minimize potential adverse effects on heart health associated with long-term overconsumption.

In addition, choosing healthier cooking methods such as steaming or boiling, rather than frying, can also help reduce intake of unhealthy fats.

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Dr. Shen Yonghua
May 24, 2025
What are the benefits of regularly drinking corn silk and chrysanthemum porridge?

Drinking corn silk and chrysanthemum porridge regularly offers numerous health benefits to the human body, especially in promoting health and preventing diseases. In traditional Chinese medicine, corn silk is considered sweet and neutral in nature, and is known for its diuretic and anti-edema properties, as well as its ability to clear heat and detoxify the body. It is suitable for symptoms such as edema and difficulty in urination.

Corn silk contains abundant flavonoids, which have antioxidant and anti-inflammatory effects, and can help lower blood pressure and improve blood glucose levels. Chrysanthemum, regarded in traditional Chinese medicine as an effective herb for clearing liver heat, improving vision, and relieving wind-heat conditions, is suitable for treating headaches, dizziness, red and painful eyes, and other related symptoms.

The components found in corn silk and chrysanthemum have the effect of dilating blood vessels and lowering blood pressure, thus offering certain auxiliary therapeutic benefits for patients with hypertension. The sedative components in chrysanthemum can help people relax their mind and body and improve sleep quality.

Various antioxidant substances in chrysanthemum assist in removing free radicals, protecting the body from oxidative damage, and potentially delaying the aging process. For individuals who work long hours in front of computers, moderate consumption of this porridge can also help relieve eye fatigue and provide certain health benefits. However, individuals with cold body constitutions should avoid excessive consumption to prevent discomfort.

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Dr. Shen Yonghua
May 24, 2025
Can patients with atrophic gastritis take Sanjiu Weitai Granules?

Patients with atrophic gastritis can usually take Sanjiu Weitai Granules, but it is recommended to use them under the guidance of a physician.

Atrophic gastritis is a chronic condition characterized by the atrophy of gastric mucosal glands, leading to reduced gastric acid secretion and impaired digestive function. The main ingredients of Sanjiu Weitai Granules include traditional Chinese herbs such as Coptis (Huang Lian) and Scutellaria (Huang Qin), which have effects of clearing heat and detoxifying, harmonizing the stomach, and relieving pain. It is suitable for discomfort caused by gastric diseases such as gastritis and gastric ulcers.

For patients with atrophic gastritis, the focus of treatment lies in protecting the gastric mucosa and promoting the recovery of glands, rather than merely alleviating symptoms. Although Sanjiu Weitai Granules may relieve some discomfort, whether they are suitable for a particular patient should be determined by considering the individual's specific condition, constitution, and the presence of other complications.

When taking Sanjiu Weitai Granules, patients should follow the physician's advice and use the medication under medical supervision, avoiding potential side effects associated with excessive or long-term use, such as oral bitterness, abdominal pain, diarrhea, nausea, and vomiting.

During treatment, patients should also pay attention to dietary and lifestyle adjustments, such as developing regular eating habits, eating smaller meals more frequently, and avoiding overeating, to promote recovery from the condition.

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Dr. Shen Yonghua
May 24, 2025
What are the effects of Hericium erinaceus Beverage (oral liquid) on the human body?

Hou Gu Yin (oral liquid) mainly functions to protect the gastric mucosa, promote digestion, alleviate stomach discomfort, and enhance immunity in the human body. The active components in Hericium erinaceus can repair damaged gastric mucosa and reduce the irritation of gastric acid on the stomach lining, thereby relieving symptoms such as stomach pain and bloating. At the same time, the polysaccharides and trace elements in Hericium erinaceus help promote the secretion of digestive enzymes and improve digestive function. Hericium erinaceus also exhibits anti-inflammatory and antioxidant properties, which can reduce gastric inflammation and protect gastrointestinal health. Additionally, the nutritional components in Hericium erinaceus help enhance the body's immune system and improve disease resistance.

During the administration of Hou Gu Yin (oral liquid), it is recommended to follow the doctor's instructions and take the medication regularly and in the prescribed dosage. Maintain a light diet and avoid consuming spicy, greasy, or strongly irritating foods that may加重 the stomach's workload. At the same time, maintaining healthy lifestyle habits, such as regular作息 and moderate exercise, can help improve overall health. If any adverse symptoms occur during treatment, promptly consult a doctor. Additionally, regular follow-up examinations to monitor gastric health are also necessary.

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Dr. Shen Yonghua
May 24, 2025
What medications should be taken for gastroenteritis?

For gastroenteritis caused by bacteria, antibiotic medications such as amoxicillin and norfloxacin are usually used to eliminate the source of infection.

For viral gastroenteritis, symptomatic treatment is primarily adopted, such as replenishing fluids and electrolytes, using oral rehydration salts (ORS). Additionally, antidiarrheal medications such as loperamide, and antacid medications such as omeprazole may be used to alleviate symptoms.

For patients experiencing abdominal pain, antispasmodic analgesics such as anisodamine and atropine can be selected to relieve smooth muscle spasms and reduce pain. Patients with significant diarrhea symptoms can use antidiarrheal medications such as montmorillonite powder and loperamide to reduce intestinal motility and achieve the goal of controlling diarrhea.

Dietary adjustments should also be considered during treatment, avoiding oily and spicy foods and consuming more easily digestible foods such as porridge and noodles. Any medication treatment should be conducted under the guidance of a professional physician; self-medication is not recommended.

If the body develops any discomfort symptoms, it is recommended to seek medical attention at a hospital promptly and follow the physician's instructions for treatment.

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Dr. Shen Yonghua
May 24, 2025
Dizziness, nausea, and vomiting in children

Children presenting with symptoms of dizziness, nausea, and vomiting may be affected by various causes. Diagnosis should be made comprehensively based on medical history, clinical manifestations, and necessary auxiliary examinations.

Food or drug poisoning are common causes that can lead to dizziness, nausea, and vomiting in children. Parents should seek immediate medical attention and follow the doctor's instructions for management. Common cold may also cause these symptoms; parents should observe whether the child presents with other cold symptoms such as high fever.

Acute gastroenteritis is another possible cause, especially common during summer and autumn. Children may experience symptoms such as diarrhea, abdominal pain, and bloating, and severe cases may lead to dehydration or even shock.

Central nervous system disorders, such as encephalitis, meningitis, or intracranial tumors, may also present with the above symptoms and require neurological examination and imaging evaluation. Finally, metabolic diseases such as hypoglycemia, electrolyte imbalance, and psychological factors such as functional dizziness caused by anxiety or stress should not be overlooked.

If any physical discomfort occurs, it is recommended to visit a hospital promptly and follow medical advice for treatment.

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Dr. Shen Yonghua
May 24, 2025