b. Mercury alloy ratio. c. Trifurcation method and time. d. Condensation technique. e. Marginal integrity and anatomic characteristics. f. The final finish. (A) Improper selection of alloy: Proper selection of the alloy helps in the success of the restoration. High copper spherical alloys are chosen over low copper because of better strength and lesser creep of the material and it has also less corrosion properties. (B) Improper trifurcation: Under trifurcation – the property trifurcated amalgam mass will have shiny appearance under trifurcated amalgam leads to granular mix, their by affecting the strength of amalgam. This leads to less working time for condensation and carrying leading to improper condensation and carrying which intern affects the success of restoration. (C) Improper condensation: Delayed, prolonged or poor condensation of amalgam can adversely effect the adaptation of the material. This will increases the chance of microleakage, secondary caries, rough surface etc on proper condensation around 1- 1½ kgs of pressure is to be applied immediately when the amalgam
14