[P-33] Evaluating the Accuracy of Intaglio Surface in Immediately Fabricated Removable Dentures: A Preliminary Digital and Laboratory Study
[Abstract]
[Objective]
Immediately fabricated removable dentures remain a challenge in the field of prosthodontics. The aim of this study was to evaluate the accuracy of the intaglio surface of an immediately fabricated removable complete denture base using different visible light cured materials.
[Method]
A standard edentulous mandibular NISSIN model was utilized in this preliminary study. Four visible light-cure resin materials including Splint Resin LC, Denture Aid LC, Fdr Peri and Mild Rebaron LC were used to immediately fabricate the denture base. Inorder to standardize the amount and thickness of used materials, a U-shape template was created using 3D modeling Blender 4.0 software and 3D printed template was filled by each material and then the material was applied on the standard mandibular edentulous model maintaining the same thickness. The denture bases were then light cured according to manufacturer instructions. The edentulous model was scanned using the intraoral scanner Trios 4. The obtained digital data was imported to the 3D analyzing Meshlab software and saved as reference data. Finally, the intaglio surfaces of the four denture bases were scanned, and imported digital 3D models were converted first to 3D meshes, and superimposed separately on the reference model1. The accuracy of surface alignment of the scanned intaglio surface of the four materials was evaluated.
[Results and Discussion]
Quantitative comparison of surfaces was performed by comparing the accuracy of the 3D meshes alignment with the reference model. The maximum aligned average and median errors were found in Mild Rebaron model with 0.264mm and 0.313mm respectively. On the other hand, the lowest aligned average and median errors were obtained in the Denture Aid model with 0.052mm and 0.063mm respectively. The four materials evaluated in this study showed different levels of accuracy, however, a relatively accurate intaglio surface might be possible in immediately fabricated denture base. The results might open the door for more research work in this field.
[References]
1) Ghassan Masri et al. Evaluation of the Adaptation of Complete Dentures Fabricated Using Intraoral Scanning and Conventional Techniques. J Contemp Dent Pract. 2020; 21.
[Objective]
Immediately fabricated removable dentures remain a challenge in the field of prosthodontics. The aim of this study was to evaluate the accuracy of the intaglio surface of an immediately fabricated removable complete denture base using different visible light cured materials.
[Method]
A standard edentulous mandibular NISSIN model was utilized in this preliminary study. Four visible light-cure resin materials including Splint Resin LC, Denture Aid LC, Fdr Peri and Mild Rebaron LC were used to immediately fabricate the denture base. Inorder to standardize the amount and thickness of used materials, a U-shape template was created using 3D modeling Blender 4.0 software and 3D printed template was filled by each material and then the material was applied on the standard mandibular edentulous model maintaining the same thickness. The denture bases were then light cured according to manufacturer instructions. The edentulous model was scanned using the intraoral scanner Trios 4. The obtained digital data was imported to the 3D analyzing Meshlab software and saved as reference data. Finally, the intaglio surfaces of the four denture bases were scanned, and imported digital 3D models were converted first to 3D meshes, and superimposed separately on the reference model1. The accuracy of surface alignment of the scanned intaglio surface of the four materials was evaluated.
[Results and Discussion]
Quantitative comparison of surfaces was performed by comparing the accuracy of the 3D meshes alignment with the reference model. The maximum aligned average and median errors were found in Mild Rebaron model with 0.264mm and 0.313mm respectively. On the other hand, the lowest aligned average and median errors were obtained in the Denture Aid model with 0.052mm and 0.063mm respectively. The four materials evaluated in this study showed different levels of accuracy, however, a relatively accurate intaglio surface might be possible in immediately fabricated denture base. The results might open the door for more research work in this field.
[References]
1) Ghassan Masri et al. Evaluation of the Adaptation of Complete Dentures Fabricated Using Intraoral Scanning and Conventional Techniques. J Contemp Dent Pract. 2020; 21.