Category: H
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Hemostatic agent
Any compound, such as aluminum chloride or ferric sulfate, that stops or decreases hemorrhage. Oftentimes, these agents are used to control bleeding during impression taking, restoration delivery, and surgical procedures.
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Hemostat
An agent, apparatus, or instrument that may be used to stop hemorrhage. Any agent that arrests, chemically or mechanically, the flow of blood from an open vessel. Pliers-like instrument used to compress blood vessels to stop the bleeding. A device or medicine that arrests the flow of blood.
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Hemostasis
The arrest of bleeding, either physiologically, surgically, or mechanically. The process which spontaneously arrests the flow of blood from vessels carrying blood under pressure. It is accomplished by contraction of the vessels, adhesion and aggregation of formed blood elements, and the process of blood or plasma coagulation. The condition of controlled bleeding. Stopping hemorrhage. Naturally…
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Hemorrhage
Escape of blood from the circulatory system; often excessive and may be uncontrollable. Bleeding or escape of blood from a vessel. The escape of large volumes of blood from a blood vessel. May be external bleeding or internal bleeding. Abnormal internal or external discharge of blood. Bleeding from the blood vessels, often as the result…
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Hemisection
The surgical separation of a multirooted tooth, especially a mandibular molar, through the furcation in such a way that a root and the associated portion of the crown may be removed. Cutting an organ or tissue in half.
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Hemi‐maxillectomy
Partial surgical removal of the maxilla.
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Hemidesmosome
An ultrastructural feature located on the basal surface of some epithelial cells forming the position of attachment between the basal surface of the cell and the basement membrane, or the conditioning film of a dental implant. The half of a desmosome produced by epithelial cells for attachment of the basal surface of the cell to…
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Hematopoietic stem cell
Progenitor or precursor cells found in the bone marrow from which all blood cell types of both the myeloid and lymphoid lineages are derived. Is a cell isolated from the blood or bone marrow that can renew itself, and can differentiate to a variety of specialized cells. A pluripotent cell capable of differentiating into various…
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Hematoma
A confined gathering of extravasated blood, usually clotted, that presents as a mass in a tissue, organ, or space. Localized swelling filled with blood due to a broken blood vessel. The localized collection of blood in the tissues as a result of injury. A swelling resulting from blood collecting in a restricted space, such as…
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Hemangioma
A benign blood vessel neoplasm; may occur as capillary or cavernous; soft, painless, red to purple, blanches on pressure. A tumor composed of blood vessels or large spaces containing blood. General name for a variety of discolorations on the skin of newly born infants, sometimes called birthmarks. These are a form of nevus (skin blemish)…