Portal:Medicine

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The Medicine Portal

Physician examining a patient.
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Medicine is the branch of health science and the sector of public life concerned with maintaining or restoring human health through the study, diagnosis and treatment of disease and injury. It is both an area of knowledge — a science of body systems, their diseases and treatment — and the applied practice — an art or craft — of that knowledge. However, medicine often refers more specifically to matters dealt with by physicians and surgeons.

The term "medicine" is sometimes used amongst medical professionals as shorthand for internal medicine. Veterinary medicine is the practice of health care in animal species other than human beings. Please see our medical disclaimer for cautions about Wikipedia's limitations.

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Tooth enamel is the hardest and most highly mineralized substance of the body, and with dentin, cementum, and dental pulp is one of the four major parts of the tooth. It is the normally visible dental tissue of a tooth and must be supported by underlying dentin. Ninety-six per cent of enamel consists of minerals, with water and organic material composing the rest. The normal color of enamel varies from light yellow to grayish white. At the edges of teeth where there is no dentin underlying the enamel, the color sometimes has a slightly blue tone. Since enamel is semitranslucent, the color of dentin and any restorative dental material underneath the enamel strongly affects the appearance of a tooth. Enamel varies in thickness over the surface of the tooth and is often thickest at the cusp, up to 2.5 mm, and thinnest at its border, which is seen clinically as the cementoenamel junction (CEJ).

Enamel's primary mineral is hydroxyapatite, which is a crystalline calcium phosphate. The large amount of minerals in enamel accounts not only for its strength but also for its brittleness. Dentin, which is less mineralized and less brittle, compensates for enamel and is necessary as a support. (More...)


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Quotes

  • "… the best thing for being sad… is to learn something.” - Merlin to Arthur; The Sword in the Stone by T. H. White
  • "Health is like money, we never have a true idea of its value until we lose it.” - Josh Billings
  • "Be careful about reading health books. You may die of a misprint.” - Mark Twain

Medicine topics

Andreas Vesalius: Base Of The Brain Anatomy

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Star of life First aid & emergency medicine

Physician treating a patient. History of medicine

Ampoule prefilled with propofol Medical equipment

Bone marrow biopsy from the hip bone in a sheep Medical treatments

Renal Cell Carcinoma Pathology

Aesculap-serpentine Pharmacology

ndreas Vesalius (portrait from the Fabrica). Physicians

Diagram of the human heart (cropped) Physiology

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Medline Plus

MedlinePlus is a free Web site that provides consumer health information for patients, families, and health care providers. MedlinePlus brings together quality information from the United States National Library of Medicine, the National Institutes of Health (NIH), other U.S. government agencies, and health-related organizations. The U.S. National Library of Medicine produces and maintains MedlinePlus.

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