Effect of Packing Pressure on Amalgam Restoration : Part 1 Measurement of Packing Force

DOI Web Site Web Site

Bibliographic Information

Other Title
  • アマルガム修復物におよぼす填塞圧の影響 : 第 1 報填塞力の測定
  • アマルガム修復物におよぼす填塞圧の影響-1-填塞力の測定
  • アマルガム シュウフクブツ ニ オヨボス テンサイアツ ノ エイキョウ 1 テ

Search this article

Abstract

It is well known that the packing pressure affects some physical properties of dental amalgam. In the present report, the packing force of amalgam was measured for four kinds of alloys using a manikin in order to find out the actual effect of the packing pressure. Class I cavities were prepared on upper and lower central incisors, first premolars and second molars of each side. The force was detected through a load sensor combined with a usual amalgam packer of 1.4mm in head diameter. The operator worked in his standing or sitting posture. Mirror technic was also examined. Highly significant differences in packing force were found among materials employed. The differences seem to be mainly dependent upon the original shape of γ alloy particle, and not upon the alloy system : the conventional or high-copper. Spherical type amalgams exhibited less than half the packing force for lathe cut type ones. The pressure converted from the latter was approximately the same as the static pressure specified in ADAS to prepare the specimen for most of the physical tests. No differences in packing force could be detected statistically among teeth locations prepared, between standing and sitting postures of the operator, or between normal and mirror technics, indicating that the easiest packing method for the operator will do at any location so long as the packing force is concerned.

Journal

Details 詳細情報について

Report a problem

Back to top