Abdulaziz AlHelal1, Hamad S AlRumaih2, Mathew T Kattadiyil3, Nadim Z Baba4, Charles J Goodacre5. 1. Faculty, Department of Prosthetic Dental Sciences, College of Dentistry, King Saud University, Riyadh, Saudi Arabia. Electronic address: alhelal.abdulaziz@gmail.com. 2. College of Dentistry, University of Dammam, Dammam, Saudi Arabia. 3. Professor and Director, Advanced Specialty Education Program in Prosthodontics, Loma Linda University School of Dentistry, Loma Linda, Calif. 4. Professor, Hugh Love Center for Research and Education in Technology, Loma Linda University School of Dentistry, Loma Linda, Calif. 5. Distinguished Professor, Loma Linda University School of Dentistry, Loma Linda, Calif.
Abstract
STATEMENT OF PROBLEM: Clinical studies comparing the retention values of milled denture bases with those of conventionally processed denture bases are lacking. PURPOSE: The purpose of this clinical study was to compare the retention values of conventional heat-polymerized denture bases with those of digitally milled maxillary denture bases. MATERIAL AND METHODS: Twenty individuals with completely edentulous maxillary arches participated in this study. Definitive polyvinyl siloxane impressions were scanned (iSeries; Dental Wings), and the standard tessellation language files were sent to Global Dental Science for the fabrication of a computer-aided design and computer-aided manufacturing (CAD-CAM) milled denture base (group MB) (AvaDent). The impression was then poured to obtain a definitive cast that was used to fabricate a heat-polymerized acrylic resin denture base resin (group HB). A custom-designed testing device was used to measure denture retention (N). Each denture base was subjected to a vertical pulling force by using an advanced digital force gauge 3 times at 10-minute intervals. The average retention of the 2 fabrication methods was compared using repeated ANOVA (α=.05). RESULTS: Significantly increased retention was observed for the milled denture bases compared with that of the conventional heat-polymerized denture bases (P<.001). CONCLUSIONS: The retention offered by milled complete denture bases from prepolymerized poly(methyl methacrylate) resin was significantly higher than that offered by conventional heat- polymerized denture bases.
STATEMENT OF PROBLEM: Clinical studies comparing the retention values of milled denture bases with those of conventionally processed denture bases are lacking. PURPOSE: The purpose of this clinical study was to compare the retention values of conventional heat-polymerized denture bases with those of digitally milled maxillary denture bases. MATERIAL AND METHODS: Twenty individuals with completely edentulous maxillary arches participated in this study. Definitive polyvinyl siloxane impressions were scanned (iSeries; Dental Wings), and the standard tessellation language files were sent to Global Dental Science for the fabrication of a computer-aided design and computer-aided manufacturing (CAD-CAM) milled denture base (group MB) (AvaDent). The impression was then poured to obtain a definitive cast that was used to fabricate a heat-polymerized acrylic resin denture base resin (group HB). A custom-designed testing device was used to measure denture retention (N). Each denture base was subjected to a vertical pulling force by using an advanced digital force gauge 3 times at 10-minute intervals. The average retention of the 2 fabrication methods was compared using repeated ANOVA (α=.05). RESULTS: Significantly increased retention was observed for the milled denture bases compared with that of the conventional heat-polymerized denture bases (P<.001). CONCLUSIONS: The retention offered by milled complete denture bases from prepolymerized poly(methyl methacrylate) resin was significantly higher than that offered by conventional heat- polymerized denture bases.
Authors: Noha H El-Shaheed; Hanadi A Lamfon; Rabab I Salama; Amira Mohammed Gomaa Faramawy; Aisha Zakaria Hashem Mostafa Journal: Int J Dent Date: 2022-06-16
Authors: Eva Anadioti; Leen Musharbash; Markus B Blatz; George Papavasiliou; Phophi Kamposiora Journal: BMC Oral Health Date: 2020-11-27 Impact factor: 2.757