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Tissue conditioner를 이용한 dynamic impression
정재현,장두익,김희중 조선대학교 구강생물학연구소 2003 口腔生物學硏究 Vol.27 No.1
Recently, it is frequently accepted for impression of complete denture that alginate (irreversible hydrocolloid) is used for primary impression and special tray is used for secondary impression. But, most standard textbooks recognize the variation in academic opinion and each offers various materials and techniques for functional(secondary) impression. The variety of recommendations in standard textbooks suggests no one technique is satisfactory for all clinical situations. Especially, impression taking is more difficult in mandible that has many muscle movement than in maxilla. The possibilities of overcoming treatment difficulties of patients with advanced mandibular residual ridge resorption by means of a dynamic impression method was stressed in a previous article Numerous presentations of dynamic impression methods include those of Schrott, Momme, Skogsborg, Greene, Loos, Hromatka, and Matthews, At the beginning, this method was applied tentatively for special patients after variations of conventional method was failed. The results were encouraging and, eventually, the dynamic impression became the impressicn of choice in the treatment of patients with a questionable prognosis with conventional dentures. Recently, dynamic impression has been used for treatment of patients with extreme resorption of the mandibular residual ridge. The shape of the osseous structures in these patients offers little possibility of retention and stability of complete dentures. Furthermore, muscle attachments are located near the crest of the residual ridge and, consequently, the dislocating effect of the muscles on the denture is great. For these reasons, the range of muscle action, as well as spaces into which the denture can be extended without dislocation, must be accurately recorded in the impression. Such impressions can be made by means of dynamic method.