Clinical Research Directory

Influence of Digital Workflows on Maxillary Complete Denture Base Accuracy

Study Summary for Patients This research was carried out at Istanbul University to compare different ways of making upper denture bases. The goal was to see how well each method fits the mouth. Who participated? Thirteen completely edentulous patients (mean age 58 ± 3 years; 7 males, 6 females) were recruited at the Department of Prosthodontics, Istanbul University. All participants provided written informed consent, and ethical approval was obtained in accordance with the Declaration of Helsinki. What was tested? The study tested the fit accuracy of maxillary complete denture bases fabricated through four distinct clinical workflows-conventional, fully digital, hybrid early, and hybrid late. Each patient received four maxillary denture bases fabricated through distinct workflows: Conventional (C): Traditional impression and compression molding technique. Fully Digital (FD): Intraoral scanning, CAD design, and 3D printing. Hybrid Early (HE): Digitally designed custom tray followed by conventional impression and fabrication. Hybrid Late (HL): Conventional impression, cast scanning, CAD design, and 3D printing. How was fit checked? All denture bases were scanned with a high-resolution industrial scanner. Their intaglio surfaces were superimposed onto the corresponding master cast scans using specialized software. Fit accuracy was assessed at 22 predefined anatomical points across six regions (alveolar ridge crest, palate, anterior and lateral border seals, posterior palatal seal, and bilateral tuberosities). This methodology enabled both overall and region-specific evaluation of adaptation. Why is this important? Accurate denture base fit is essential for patient comfort, stability, and functional performance. By systematically comparing conventional and digital workflows, this study provides evidence on which fabrication approach yields superior adaptation, thereby guiding clinicians toward more predictable and patient-centered prosthodontic outcomes.