Effect of disinfection on shear bond strength between heat activated acrylic resin denture base and commercially available denture teeth: An in vitro study

Background and Objectives: Acrylic resin had a long history of been used in the fabrication denture since they exhibit better chemical bond between teeth base. With increasing use dentures, detachment from dentures also increased proportionally. Denture disinfection is an essential procedure for maintaining good hygiene denture. The aim study to evaluate effect on shear strength heat activated base.Objectives1.To acrylic base measured using universal testing machine (Instron) expressed MPa.2.To analyse bonding failure tooth interface stereomicroscope at 25 X magnification. Methodology: Two commercial brands (Acryrock Ivostar) were tested. There 12 subgroups study. Each brand was divided into six comprising five experimental one control group. In subgroup A1B1 A2B2 (chemical disinfection) specimens immersed 4% chlorhexidine sodium perborate monohydrate solution 15 minutes daily 19 days respectively, Subgroup A3B3 (mechanical subjected mechanical 14 hours A4B4 A5B5 followed by with respectively. Control group A6B6 distilled water 37degree Celsius days. Shear performed cross head speed 1mm/minute. Bond rates quantified classified as adhesive, cohesive or mixed. Data analyzed independent t test chi-square test.Results: subgroupA1B1 subgroupA2B2, (p=0.615) (p=0.615), (p