Evaluation of the Effect of Applying Air-particle Abrasion on the Retention of the Maxillary Complete Denture

Complete denture’s retention is an important issue which sometimes in spite of all efforts does not provide patient and dentist’s satisfaction. The aim of this study was to evaluate the effect of sandblasting the impression surface on the maxillary denture retention. In this Before and After Clinical trial, for 15 patient of the Department of Prosthodontics of the Shahed University, 2 bases similar to their original upper denture were prepared. By applying a digital force transducer, the force needed to dislodge the base from the patients’ palate was measured. The internal surface of the bases were air abraded by 50 micron Alumina particles for 1 minute except for the borders which were covered by Aluminum thin foils. By sandblasting, the mean retention of the bases increased from 30.89± 10.74 N to 37.66±9.76 N (21.9%) which was statistically significant (p<0.0001). According to the findings of the present study, sandblasting the intaglio surface of the maxillary complete denture with abrasive particles will enhance the retention of the denture.