Salivary Glands
نویسنده
چکیده
Saliva plays an essential role in maintaining oral health. Alterations in salivary function lead to compromise of oral tissues and functions and have a large impact on a patient’s quality of life. Reductions in salivary flow most commonly manifest as symptoms of oral dryness. This subjective complaint of dry mouth is termed xerostomia, whereas objective alterations in salivary performance, quantitative or qualitative, are referred to as salivary gland dysfunction. This distinction, between symptoms and functional impairment, should be remembered when the evaluation of salivary gland disease is discussed. Although xerostomia is most often indicative of reduced salivary output, it is not invariably associated with objective salivary gland hypofunction. One cannot assume a diagnosis of salivary gland dysfunction based on reports of oral dryness alone. Conversely, the absence of symptoms of dry mouth is not a guarantee of adequate salivary function. Full and systematic evaluation is essential to determine if salivary gland dysfunction is present. This determination is important, as individuals who have true salivary gland hypofunction require aggressive management to prevent or minimize the deleterious effects of reduced salivary function. Multiple functions of saliva have been recognized. Saliva is important for taste, mastication, deglutition, digestion, maintenance of oral hard and soft tissues, control of oral microbial populations, voice, and speech articulation (Table 26–1). Saliva plays a role in taste perception by serving as a solute for tastants. Although taste can be maintained in the absence of major salivary gland function, complaints of dysgeusia and hypogeusia are increased in patients with decreased salivary gland function (see Chapter 27). Lubrication of the oral cavity is another important function of saliva. Adequate salivary flow enhances movement of the tongue and lips, which aids in cleansing the oral cavity of food debris and bacteria. This also allows for ease of proper tongue and lip movement necessary for clear articulation. The oral preparatory stage of swallowing requires the formation of a food bolus. Efficient chewing and bolus formation are dependent upon
منابع مشابه
Radioprotective effect of thymol against salivary glands dysfunction induced by ionizing radiation in rats
The aim of this study was to investigate the radioprotective effect of thymol as a natural product against salivary glands dysfunction induced by ionizing radiation in rats. The rats were treated with thymol at dose of 50 mg/Kg before exposure to radiation at dose 15Gy. Salivary gland function was evaluated with radioisotope scintigraphy and then salivary gland to background counts ratio was ca...
متن کاملRadioprotective effect of thymol against salivary glands dysfunction induced by ionizing radiation in rats
The aim of this study was to investigate the radioprotective effect of thymol as a natural product against salivary glands dysfunction induced by ionizing radiation in rats. The rats were treated with thymol at dose of 50 mg/Kg before exposure to radiation at dose 15Gy. Salivary gland function was evaluated with radioisotope scintigraphy and then salivary gland to background counts ratio was ca...
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Introduction: Radical radiation therapy of head and neck cancers may injure the salivary glands and reduce their function. Single-photon emission computed tomography (SPECT) images maybe used to evaluate function post-therapy. However, accurate quantification is hindered by the partial volume effects (PVEs). The present study involved the introduction of a PVEs quantif...
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Introduction: The use of radioactive iodine (131I) has become an important adjunct to the treatment of thyroid cancer and hyperthyroidism. Salivary gland has the ability to concentrate radioactive iodine under normal circumstances. Salivary gland dysfunction and dry mouth are the common side effectsof high-dose radioiodine therapy. The purposeof this stu...
متن کاملA Review of Signet Ring cells in Salivary Gland Tumors
Objectives: Signet Ring Cells (SRCs) are often seen in gastrointestinal, breast, bile duct and lung invasive carcinomas. Observing these cells in benign and malignant lesions of the salivary glands is not common. Signet-ring cell adenocarcinoma is rare and is commonly seen in the secondary salivary glands. Although, the presence of SRCs in other neoplasms of the body is usually associated with ...
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