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contact |
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contact /con·tact/ (kon´takt) 1. a mutual touching of two bodies or persons. 2. an individual known to have been sufficiently near an infected person to have been exposed to the transfer of infectious material. direct contact , immediate contact the contact of a healthy person with a person having a communicable disease, the disease being transmitted as a result. balancing contact the contact between the upper and lower occlusal surfaces of the teeth on the side opposite the working contact. complete contact contact of the entire adjoining surfaces of two teeth. indirect contact , mediate contact that achieved through some intervening medium, as prolongation of a communicable disease through the air or by means of fomites. occlusal contact contact between the upper and lower teeth when the jaws are closed. proximal contact , proximate contact touching of the proximal surfaces of two adjoining teeth. working contact that between the upper and lower teeth on the side toward which the mandible has been moved in mastication.
contact, n the act of touching or meeting. contact, balancing, n the contact established between the maxillary and mandibular dentures at the side opposite the working side (anteroposteriorly or laterally) for the purpose of stabilizing the dentures. contact, deflective occlusal, n (cuspal interference), a condition of tooth contacts that diverts the mandible from a normal path of closure to centric jaw relation or causes a denture to slide or rotate on its basal seat. See also contact, interceptive occlusal. contact, faulty, n imperfections in the contact between adjacent teeth. Often leads to food impaction between the teeth, with subsequent initiation or perpetuation of periodontal lesions. contact, initial, n the first meeting of opposing teeth on elevation of the mandible toward the maxillae. contact, interceptive occlusal, n an initial contact of teeth that interferes with the normal movement of the mandible. See also contact, deflective occlusal. contact, premature, n See deflective occlusal and contact, interceptive. contact, working, n a contact of the teeth made on the side of the dental arch toward which the mandible has been moved. contact 1. a mutual touching of two bodies or animals. 2. an animal known to have been sufficiently near an infected animal to have been exposed to the transfer of infectious material. contact activation the initiation of the intrinsic pathway of coagulation that occurs when whole blood contacts glass or similar surfaces; involves the conversion of factor XII into its active form, factor XIIa. This subsequently converts factor XI to XIa and so the coagulation cascade begins. contact allergy see contact dermatitis (below). bone contact repair repair of a fracture by contact apposition of the two fracture surfaces. contact dermatitis is caused by direct contact between the skin and a substance which is irritating or to which the animal is allergic or sensitive. The reaction usually occurs only on that area of the body that has come into contact with the substance. See also allergic contact dermatitis. direct contact, immediate contact the contact, by sharing the same accommodation or pasture or group, of a healthy animal with an animal having a communicable disease, the disease being transmitted as a result. See also contact transmission. contact healing a form of primary bone healing at a fracture site where there is cortical bone in contact. contact hypersensitivity see allergic contact dermatitis. indirect contact that achieved through some intervening medium, as propagation of a communicable disease through the air or by means of fomites or another animal, e.g. an infection may be passed to animal A from animal B via animal C; animal C is an indirect contact. contact irritant dermatitis skin disease produced by contact with an irritating substance; in contrast with allergic contact dermatitis, an immune reaction is not involved. mediate contact indirect contact. |
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