Category: H

  • Hyperemia

    An excessive accumulation of blood in a tissue due to vascular engorgement. Is the increased blood flow that occurs when tissue is active. An increased amount of blood that expands or distends the blood vessels. Increased blood in part of the body, caused by inflammatory response or blockage of blood outflow; the skin typically becomes…

  • Hypercementosis

    An excessive deposition of cementum.  

  • Hyperbaric oxygenation

    The administration of oxygen in an enclosed space at greater than atmospheric pressure; also called hyperbaric oxygen therapy. A technique for exposing a patient to oxygen at high pressure. It is used to treat carbon monoxide poisoning, gas gangrene, and acute breathing difficulties. It is also used in some cases during heart surgery. Administration of…

  • Hyperbaric oxygen treatment (HBOT)

    Therapy used in irradiated cancer patients to improve wound healing and osseointegration of implants. Administration of 100% oxygen under increased atmospheric pressure (usually 2 atm or 10 m sea water). The elevated partial pressure of oxygen to tissues has been shown to improve angiogenesis, bone metabolism, and success of osseointegration. It has been recommended that…

  • Hyperbaric oxygen therapy (HBOT)

    Treatment modality where a patient is placed in a pressurized (hyperbaric) chamber that allows for the delivery of oxygen in high concentrations for therapeutic benefits. It is sometimes used prior to implant therapy for patients who underwent radiation therapy in the head and neck areas, to reduce the risks of osteoradionecrosis. In a specialized chamber,…

  • Hyperbaric chamber

    An enclosed space or tube that accommodates a patient and subjects the patient to ambient gas pressures >1 atm. Chamber in which the oxygen pressure is higher than in the atmosphere; used to treat carbon monoxide poisoning, diving accidents, burns, infections (particularly gas gangrene), and certain breathing disorders. An airtight enclosure strong enough to withstand…

  • Hyperalgesia

    Increased pain response to a normally painful stimulus. An increased sensitivity to pain, which may be caused by damage to nociceptors or peripheral nerves. An excessive sensitivity to pain; the opposite of hypalgesia. Decreased threshold to a normally painful stimulus. An increase in pain sensitivity such that normally painful stimuli feel even more painful. An…

  • Hypalgesia (hypoalgesia)

    Reduced sensitivity to pain that results from a raised pain threshold. A lessened sensitivity to pain; the opposite of hyperalgesia.  

  • Hygienic (sanitary) pontic

    A pontic (suspended crown in a fixed bridge) that is simpler to clean because it has a rounded or bullet‐shaped cervical form and does not contact the edentulous ridge. Producing healthy conditions.  

  • Hygiene cap (syn)

    Comfort cap, healing abutment, healing cap, sealing screw. Component inserted over a prosthetic abutment. Its function is to prevent debris and calculus from invading the internal portion of the abutment between prosthetic appointments.