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Pubmed for Handhelds

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  • Title: [Evaluation of cervical gaps in complete metal crowns cast in alternative silver-tin alloys. Relationship to investing techniques].
    Author: Vecchio GM, Pretti E, Vaz RR, Zaniquelli O.
    Journal: Arq Cent Estud Curso Odontol; 1990; 27(1-2):49-61. PubMed ID: 2135769.
    Abstract:
    The purpose of this study was to evaluate cervical mistifing of casting full metal crowns according to investment techniques using commercial available alloys made from silver stannum. Fifteen metal full crowns were obtained through stainless steel die with full crowns preparation, included into three groups as follows: conventional technique, vacuum technique and pressure technique. Readings of cervical disagreement were made through a comparing microscope increased 45 x and each crown was measured in 4 different regions (vestibular, lingual mesial and distal). This way it was verified which of the techniques proposed would balance the casting shrinkage for the silver-stannum alloy used. From the results obtained we conclude that the best cercical adaptation was the one got through pressure technique.
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