Quantifying Flabby Ridge Tissue Displacement During Impression-Making for Patients With Combination Syndrome

Patients with Combination syndrome present with early bone loss and flabby hyperplastic tissues in the anterior maxilla caused by functional loads exerted by mandibular anterior teeth on maxillary complete dentures. Use of conventional mucocompressive impression techniques captures flabby maxillary anterior ridge tissue in a distorted state, and dentures made from such impressions could displace flabby tissues when loaded and become loose when unloaded. In this study, which examined two patients diagnosed with Combination syndrome, computer-aided design/computer-aided manufacturing (CAD/CAM) technology was used to determine the degrees of displacement when six impression materials were used for making final impressions for complete dentures.