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Wang Ji Zhong
Internal Medicine
About me
Engaged in clinical medicine for a long time, experienced, participated in academic conferences domestically multiple times, and published several articles in domestic medical journals.
Proficient in diseases
Proficient in treating common internal diseases, especially hypertension, diabetes, mental disorders, and drug addiction, with rich experience.
Voices
Does a cavity mean tooth decay?
The common term for dental caries is tooth decay. In the past, many people believed that tooth decay was caused by a kind of "tooth worm" that eroded the teeth, leading to tooth damage. In fact, it's the presence of a large amount of dental plaque and tartar on the teeth, and the erosion caused by numerous bacteria on these surfaces, which is what we now refer to as the phenomenon of caries, causing the teeth to turn black. Severe erosion can affect the enamel and dentin, and if it breaks through to the dental pulp, severe pulpitis can occur. When suffering from dental caries, it is essential to seek early treatment to remove the necrotic enamel and further prevent its progression.
What is the reason for black dental caries?
Cavity prevalence is quite high, especially in children who haven't developed good oral hygiene habits and consume a lot of sweets, making them prone to cavities. Early detection is thus very important. Early symptoms of cavities are not obvious, but with careful observation, one can notice parts of the teeth turning black. This is due to bacterial erosion and damage to the teeth. Damage occurs to the enamel and dentin of the teeth. If this continues to develop, it can lead to damage to the dental pulp, resulting in pulpitis. Therefore, when you notice your teeth turning black, it is crucial to seek timely treatment to prevent the progression to pulpitis.
Anal fissures occur in which part?
Anal fissures are an extremely common condition in proctology. They occur in the fragile and narrowest tissue of the anal canal due to the combined effect of various internal and external factors, leading to the opening and cracking of the digestive tract outlet up to the dentate line and the surface of the anal margin. The oval-shaped small ulcers that form from anal fissures usually occur at the anal region, aligning parallel to the longitudinal direction of the anal canal. The condition is often recurrent and difficult to heal. The angle continuation between the anal canal and the rectum means that the posterior wall of the anal canal is under the most pressure during bowel movements. Therefore, the posterior midline is most susceptible to injury and is also the most common site for the occurrence of anal fissures.
What are the harms of dental caries in children?
Due to not forming the habit of brushing daily during childhood, and the frequent consumption of sugary foods during this period, the incidence of dental caries in children is relatively high. The onset of the disease is due to the presence of a large amount of dental plaque on the teeth, where bacteria gradually corrode the teeth, leading to the occurrence of caries. Initially, caries damage the tooth enamel on the surface, further progress destroys the dentin, and finally, it penetrates the dental pulp, forming pulpitis, which presents with obvious swelling and pain. Severe cases can also cause periapical periodontitis, leading to tooth loss, and affecting the normal emergence of permanent teeth. Therefore, it is important to maintain good oral hygiene and seek timely symptomatic treatment when children develop dental caries.
Causes of CO2 retention in respiratory failure
Respiratory failure manifests as hypoxia and the retention of carbon dioxide. The main cause of carbon dioxide retention is pathological changes in the respiratory system, such as chronic obstructive pulmonary disease with respiratory failure, status asthmaticus, pulmonary heart disease, lung cancer, etc. Some neuropathies that cause paralysis of the respiratory muscles can lead to respiratory dysfunction, resulting in the retention of carbon dioxide in the body, affecting normal cellular metabolism, causing disturbances in acid-base balance and nervous system function, and posing life-threatening conditions. The most important pathogenic mechanism causing carbon dioxide retention in these diseases is still inadequate alveolar ventilation.
Are anal fissures and hemorrhoids the same thing?
Hemorrhoids and anal fissures are common clinical conditions, but their symptoms are completely different. Generally, they both share a common symptom, which is the presence of rectal bleeding, and this bleeding is usually bright red blood. The difference between anal fissures and hemorrhoids is that anal fissures primarily cause pain, while hemorrhoids primarily cause bleeding. Hemorrhoids only cause severe pain when external hemorrhoids become inflamed and swollen, while anal fissures often involve enlargement of the anal papillae. Hemorrhoids do not involve enlargement of the anal papillae, and while anal fissures can involve skin tears around the anal canal, hemorrhoids do not. During a digital rectal exam, this can be diagnosed; hemorrhoids are caused by poor local venous circulation, leading to venous congestion and the formation of vascular bulges. Depending on their location, they are divided into internal and external hemorrhoids. Anal fissures are skin tears located on the more lateral parts of the anus, and during defecation, the tear worsens, bleeding and causing severe pain, whereas hemorrhoids usually do not cause severe pain.
Causes of respiratory failure
Respiratory failure is a severe breathing difficulty that can lead to hypoxia and carbon dioxide retention. The causes of respiratory failure can be broadly classified into the following categories: First, there are diseases of the lung parenchyma, such as various lung infections, pneumonia, pulmonary edema, lung abscess, and diseases of the lung interstitium. Another type involves obstruction of the airway, including obstruction in the upper respiratory tract, which covers the nose, pharynx, and larynx, as well as obstructions in the lower respiratory tract, which can also lead to respiratory failure. Third, there are diseases involving the peripheral nervous transmission system and the respiratory machinery, such as acute infectious polyradiculoneuritis, poliomyelitis, and some cervical spine injuries. These can severely affect the respiratory center and respiratory nerves, leading to respiratory failure.
Is tooth decay a contagious disease?
Cavities occur due to a large amount of dental plaque and tartar on the teeth, which erodes the teeth over time, causing damage to the enamel and dentin. This results in the appearance of black spots, black patches, and cavities. However, cavities are not contagious because there are always a large number of bacteria in the mouth due to eating and other reasons, so it is important to develop good brushing habits and the correct technique. Although brushing can remove some dental plaque, its effect is limited. It is best to undergo dental and gum cleaning treatments to significantly improve the removal of dental plaque and eliminate the harm of cavities to the human body.
Symptoms of gingivitis
Gingivitis is a common and frequently occurring disease. If it is not treated in time, it can lead to pulpitis, periodontitis, and even cause dental pain, necrosis, tooth loosening, and loss. When gingivitis occurs, the gingival tissues exhibit vascular congestion, leading to a change in the color of the gums from normal pink to dark red or purplish red. Additionally, symptoms of gingivitis include edema and a change in the appearance of the gums, which become looser and do not adhere tightly to the teeth. There may also be pain, increased fragility of the gums, and spontaneous bleeding, particularly noticeable during brushing and when biting hard objects.
Where does oral cancer commonly metastasize to?
Oral cancer poses a significant threat to human health, thus early detection and treatment are crucial for effective outcomes. In addition to chronic, non-healing ulcers, early signs of oral cancer include abnormal growths, pain, bleeding, and relatively early metastasis. It can infiltrate nearby muscles involved in chewing and biting, the throat affecting swallowing and speech functions, and also spread to cervical lymph nodes, causing enlargement of these nodes. Therefore, besides the symptoms in the mouth, attention must also be given to adjacent organ tissues, especially the condition of the cervical lymph nodes, to ensure timely diagnosis and treatment for effective results.