Browsing by Author "Larriva Loyola, Jaime Alejandro"

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Comparative analysis between 3D-printed models designed with generic and dental-specific software
(Universidad de Cuenca, 2023-12-13) Pazán Morales, Doménica Patricia; Larriva Loyola, Jaime Alejandro
With the great demand in the market for new dental software, it has become necessary to carry out a study of precision for digital dentistry applications, for which there is no comparative study, and there is a general lack of knowledge regarding its applications. The purpose of this study was to investigate the differences in accuracy between digital impressions obtained using the generic software G-CAD (general CAD) and D CAD (dental CAD). Our hypothesis is that there is no significant difference between the software for specific and general dental use. Methods: A typodont was digitized with an intraoral scanner and the models obtained were exported in STL format to four different software programs (Autodesk MeshMixer 3.5, Exocad Dental, Blender for dental and InLAB). The STL files obtained by each software were materialized using a 3D printer. The printed models were scanned and exported into STL files, from which six pairs of groups were formed. The groups were compared using the analysis software (3D Geomagic Control X) by superimposing them in the initial alignment order and using the best fit method. Results: There were no significant differences between the four types of software analyzed; however, group 4, composed of the combination of D-CAD (Blender-InLAB), obtained the highest average (-0.0324 SD = 0.0456), with a higher accuracy compared to the group with the lowest average (group 5, composed of the combination of the Meshmixer and Blender models), a generic software and a specific software (0.1024 SD = 0.0819). Conclusion: Although no evidence of significant differences was found with regard to the accuracy of the 3D models produced by G-CAD and D-CAD, the combinations of groups where specific dental design software was present showed greater accuracy (precision and accuracy) and also showed greater tolerance in the groups using D-CAD.
Comparative Analysis between 3D-Printed Models Designed with Generic and Dental-Specific Software
(2023) Larriva Loyola, Jaime Alejandro; Abad Coronel, Cristian Gustavo; Pazan Morales, Domenica Patricia; Hidalgo Tamayo, Maria Lorena
With the great demand in the market for new dental software, the need has been seen to carry out a precision study for applications in digital dentistry, for which there is no comparative study, and there is a general ignorance regarding their applications. The purpose of this study was to investigate the accuracy differences between digital impressions obtained using generic G-CAD (general CAD) and D-CAD (CAD dental) software. Today, there is a difference between the design software used in dentistry and these in common use. Thus, it is necessary to make a comparison of precision software for specific and generic dental use. We hypothesized that there is no significant difference between the software for specific and general dental use. Methods: A typodont was digitized with an intraoral scanner and the models obtained were exported in STL format to four different softwares (Autodesk MeshMixer 3.5, Exocad Dental, Blender for dental, and InLAB). The STL files obtained by each software were materialized using a 3D printer. The printed models were scanned and exported in STL files, with which six pairs of groups were formed. The groups were compared using analysis software (3D Geomagic Control X) by superimposing them in the initial alignment order and using the best fit method. Results: There were no significant differences between the four analyzed software types; however, group 4, composed of the combination of D-CAD (Blender– InLAB), obtained the highest average (􀀀0.0324 SD = 0.0456), with a higher accuracy compared to the group with the lowest average (group 5, composed of the combination of the Meshmixer and Blender models), a generic software and a specific software (0.1024 SD = 0.0819). Conclusion: Although no evidence of significant difference was found regarding the accuracy of 3D models produced by G-CAD and D-CAD, combinations of groups where specific dental design software was present showed higher accuracy (precision and trueness). The comparison of the 3D graphics obtained with the superimposition of the digital meshes of the printed models performed with the help of the analysis software using the best fit method, replicating the same five reference points for the six groups formed, evidenced a greater tolerance in the groups using D-CAD.
Comparative fracture resistance analysis of translucent monolithic zirconia dioxide milled in a CAD/CAM system
(Universidad de Cuenca, 2023-12-12) Paladines Díaz, María de los Ángeles; Ulloa Wilches, Ana Liz; Larriva Loyola, Jaime Alejandro
The aim of this study was to evaluate and compare the fracture resistance of definitive zirconia dioxide restorations obtained using a computer-aided design and manufacturing (CAD/CAM) system. Methods: Two groups of ten samples were analyzed for each material (n: 20); the first group was Zolid Gen X Amann Girrbach (ZGX) and the second group was Cercon HT Dentsply Sirona (CDS). The restorations were designed with identical parameters and milled with a CAD/CAM system. Each specimen was load tested at a speed of 0.5 mm/min, with a direction parallel to the major axis of the tooth and with an initial preload of 10 N until fracture using a universal testing machine (Universal/Tensile Testing Machine, Autograph AGS-X Series) equipped with a 20 kN load cell. The results obtained were recorded in Newtons (N), using software connected to the testing machine. Results: Statistically significant differences were found, and the fracture resistance of the monolithic zirconia crowns was lower in the CDS group (1744.84 ± 172.8 N) compared to the ZGX group (2387.41 ± 516 N). Conclusions: The monolithic zirconia CAD-CAM zirconia crowns showed sufficient fracture resistance when used in posterior molar and premolar zones with either material, as they withstood fracture loads greater than the maximum masticatory force.