Effect of mechanical and chemical surface treatment on bond strength of acrylic denture teeth to heat cure acrylic resin-an invitro study

Debonding of denture teeth from the base has posed a great problem to clinician and patient. Chemical mechanical treatments have been performed separately, but there are no studies using combination chemical surface treatments. This study aims at evaluating comparing bond strength by 60 maxillary right central incisor were used in 5 groups for treatment on ridge lap area: 1 untreated, 2-sandblasting, group 3- Heat cure monomer, 4- sandblasting+ 5- Dichloromethane. The acrylic attached wax block an angle 45º. These flasked dewaxed, followed acrylisation. All cured specimens loaded under universal testing machine palatal cross head speed 1mm/min till fracture occurred. Data obtained was statistically evaluated one way ANOVA. Surface with dichloromethane showed highest heat when compared sandblasting monomer application. On visual analysis fractured specimens, maximum amount cohesive failures noticed group. Dicholoromethane can be as effective quick method improve bonding base.