Analyse the effect of different investment techniques and pattern materials on surface roughness of raw Ni-Cr castings - An study.

Aims: This study aimed to analyze the effect of different investment techniques and pattern materials on the surface roughness of raw castings from nickel-chromium alloy.

Settings And Design: This is an experimental in vitro study carried out in Bharati Vidyapeeth Dental College and Hospital, Sangli, Maharastra.

Materials And Methods: Sixty square-shaped wax patterns, measuring 10 mm × 10 mm × 2 mm, were divided into four groups.

Effect of cigarette smoke on acrylic resin teeth.

Background: The discolouration of artificial teeth, which hampers aesthetics, is one of the negative effects of cigarette smoking. Therefore, the effect of cigarette smoke on the colour stability of commercially available acrylic resin teeth needs to be evaluated for clinical success and to ascertain as to which brand has superior properties.

Material And Methods: Three commercially available acrylic teeth were evaluated, after division into Group A (Premadent), Group B (Astra), and Group C (Sanyo- Dent).