Purpose: This study was conducted to evaluate the effect of border molding material and wash impression material on the retention of complete denture.

Materials and Methods: Thirty patients were selected and randomly divided into three groups depending on the material used for border molding and final impression. A loop of 19 gauge SS wire was attached to the anterior palatal region of the denture bases fabricated from three groups of impressions. The retention of the denture bases was measured by pulling the denture base inserted in the mouth downward with force gauge. The data collected was subjected to ANOVA and student’s t test to measure the intra and inter group comparisons.

Results: The mean retentive force of denture bases made under group I, II and III are 4.7 ±0.72, 5.61 ± 0.61 and 7.31 ± 0.83 respectively.

Conclusion: This study revealed that denture bases made with polyether are the most retentive.