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Dentistry is the branch of medicine focused on the evaluation, diagnosis, prevention, and treatment of diseases, disorders, and conditions of the oral cavity, commonly affecting the dentition (teeth), oral mucosa, and adjacent structures such as the jaw and facial tissues. It is a critical component of systemic health, as oral infections can often be precursors to cardiovascular disease and diabetes. Modern dentistry combines surgical precision with cosmetic enhancement, utilising advanced imaging and biomaterials to restore both function and a patient's smile.

In India, a dentist is a licensed medical doctor who has completed a five-year BDS (Bachelor of Dental Surgery) degree. To be considered a specialist, they must complete a three-year MDS (Master of Dental Surgery) in fields such as orthodontics, endodontics, etc. While they focus on the mouth, they are highly trained in anatomy, pharmacology, and local anaesthesia. They are the primary gatekeepers of oral health, ensuring that the "entry point" to your body remains free of infection and decay.

A dentist examines teeth and gums for signs of decay, disease, or other issues, performs cleanings, fillings, and extractions, and provides guidance on oral hygiene. The scope of a dentist includes:

• Preventive Care: Performing professional cleanings (scaling) and applying sealants to prevent decay before it starts.
• Restorative Work: Removing decay from cavities and restoring the tooth structure with composite fillings or crowns.
• Endodontics: Performing root canal treatment (RCT) to save infected teeth from extraction.
• Orthodontics: Aligning crooked teeth and correcting bite issues using braces or clear aligners.
• Periodontics: Diagnosing and treating inflammatory conditions of the supporting structures of the teeth (gingiva, gums, alveolar bone, etc.) and performing deep scaling to save the supporting bone.
• Oral Surgery: Managing complex extractions, such as impacted wisdom teeth, and placing dental implants.
• Cosmetic Enhancements: Improving the appearance of teeth through whitening, veneers, and bonding.

You should consult a dentist immediately if you experience:

• Persistent Tooth Pain: Sharp or throbbing pain that does not subside with over-the-counter relief.
• Bleeding Gums: Seeing blood in the sink after brushing or flossing, which is never "normal."
• Chronic Sensitivity: A sharp sensation in the teeth when consuming hot coffee or cold ice cream.
• Mouth Ulcers Not Healing: Any sore that persists for more than two weeks could be a sign of a deeper issue.
• Impacted Wisdom Tooth Pain: Swelling or pressure at the back of the jaw.
• Bad Breath (Halitosis): Persistent odour that does not improve with brushing, signalling a hidden infection.

• Cavity (Dental Caries): Bacterial demineralisation of the tooth enamel and dentine that develops into tiny openings or holes (cavities).
• Oral and Tooth Pain: Pain resulting from nerve irritation, infection, or trauma to the tooth structure. 
• Bleeding Gums (Gingivitis): Inflammation of the gums, usually caused by a bacterial infection from plaque buildup. 
• Tooth Sensitivity: Sharp, transient pain or discomfort in the teeth arising from exposed dentine as a response to certain stimuli, such as hot or cold temperatures. 
• Bad Breath (Halitosis): Unpleasant odours exhaled in breathing, often caused by poor oral hygiene or gum disease. 
• Wisdom Tooth Pain: Pain caused by "third molars" that do not have enough room to emerge or grow normally. 
• Mouth Ulcers: Painful sores on the lips, gums, or tongue, which can be caused by stress, injury, or infection. 
• Tooth Decay: The destruction of tooth enamel, the hard, outer layer of your teeth. 
• Swollen Gums: Gums that stand out, feel "puffy," or look abnormally red. 
• Crooked Teeth (Malocclusion): Teeth that are not aligned properly, which can affect chewing and hygiene. 

Note - Serious symptoms require in-person consultation with a dentist. You may choose to consult a dentist online for day-to-day problems, queries, and second opinions.

• Managing Yellow Teeth: Avoid frequent consumption of coffee, tea, and red wine, which stain enamel. Use whitening treatments only under professional supervision to avoid thinning your enamel. 
• Managing Tooth Sensitivity: Switch to a soft-bristled toothbrush and use a desensitising toothpaste containing potassium nitrate or fluoride. 
• Cavity Prevention: Brush twice a day with fluoride toothpaste and floss daily. Fluoride is essential for "remineralising" weak spots in your enamel before they turn into holes.
  
• Maintaining Gum Health: Massage your gums gently in a circular motion while brushing. Healthy gums should be firm and pink; if they are soft, bleeding, or dark red, you need a professional cleaning (scaling).
• Curing Bad Breath: Do not just brush your teeth; brush your tongue. The majority of odour-causing bacteria live on the back of the tongue. Stay hydrated to avoid "dry mouth," which causes odour.
• Oral Health and Smoking: Smoking restricts blood flow to the gums, masking the signs of gum disease (like bleeding) until it is too late. It also significantly increases the risk of oral cancer. 
• Crooked Teeth Care: If you have crowded teeth, you are at a higher risk for hidden cavities because floss cannot reach between them. Consider a consultation for clear aligners to improve both aesthetics and hygiene.