Category: N

  • Neutrophil

    The predominant polymorphonuclear leukocyte comprising up to 70% of the peripheral white blood cells. It is important in infection and injury repair, and may have impaired function in some forms of early‐onset periodontitis. A type of white blood cell, specifically a form of granulocyte. A type of white blood cell with an irregular nucleus, which…

  • Neutropenia

    An abnormal decrease in the number of circulating neutrophils. It may be cyclic in nature. A disorder of the blood, characterized by abnormally low levels of neutrophils. An abnormal decrease in the number of neutrophils, a type of white blood cell. Presence of abnormally small numbers of neutrophils in the circulating blood. A condition in…

  • Neutral zone

    The potential intraoral space where denture teeth should be preferably located, so the function of the musculature will not unseat the denture and forces generated by the tongue are counterbalanced by the forces produced by the lips and cheeks.  

  • Neurovascular bundle

    Anatomic unit comprising a nerve and its related blood vessels.  

  • Neurotmesis

    Nerve injury involving a complete severance of the nerve trunk, leading to Wallerian degeneration. Sensory and/or motor functions are impaired. The potential for recovery is remote. In implant dentistry, this may be caused by an incision of the nerve or any of the factors leading to axonotmesis. Complete loss of nerve function with little apparent…

  • Neuropathy

    An assortment of neuronal pathological conditions that occur as a consequence of trauma, infections, metabolic disorders, or exposure to toxins that induce injury to the nerve axons of the peripheral nervous system. Neuropathy typically induces pain and numbness in the affected area. Diabetic complication that involves peripheral and autonomic nervous system. A disease of the…

  • Neuromuscular dysfunction

    A collective term for muscle disorders of the masticatory system with two observable major symptoms: pain and dysfunction. Common observations include muscle fatigue, muscle tightness, myalgia, spasm, headaches, decreased range of motion, and acute malocclusion.  

  • Neurogenous pain

    Pain caused by abnormalities in the structure of nerves that innervate affected areas. Pain can occur with nociception. The pain is frequently described as burning or sharp. A sensation may occur along the pathway of the nerve. While the patient may locate the pain, the apparent area may not be the source, and the severity…

  • Neuritis

    An inflammation of the nerve characterized by pain, sensory disturbances and impairment of reflexes neuritic. Inflammation of the peripheral nerves that link the brain and the spinal cord with muscles, skin, organs, and other parts of the body. Inflammation of a nerve, giving a constant pain. Inflammation of a nerve, producing pain, loss of sensation,…

  • Neurapraxia

    Mild nerve injury caused by compression or retraction. There is no violation of the nerve trunk and no axonal degeneration. Spontaneous recovery of the motor and/or sensory functions most often occurs within 1–4 weeks from the time of injury. A lesion of a nerve which leads to paralysis for a very short time, giving a…