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Research: Computeraided Technology
Effect of printing layer thickness on the trueness and fit of additively manufactured removable dies
Additive manufacturing is commonly used for the fabrication of definitive casts with removable dies. However, how the trueness and fit of removable dies are affected by printing layer thickness is lacking.Effect of layer thickness and printing orientation on the color stability and stainability of a 3D-printed resin material
Although 3-dimensional (3D)–printed resin prostheses are widely used, studies on the effects of the manufacturing parameters of 3D printing on the color stability and stainability of these prostheses are lacking.Long-term effect of gastric juice alternating with brushing on the surface roughness, topography, and staining susceptibility of CAD-CAM monolithic materials
Studies on the behavior of computer-aided design and computer-aided manufacturing (CAD-CAM) monolithic materials subjected to gastric juice alternating with brushing—as occurs in patients with bulimia nervosa—are lacking.Design parameters of polylactic acid custom trays manufactured by fused deposition modeling for partial edentulism: Consideration of the accuracy of the definitive cast
The effects of design parameters of polylactic acid (PLA) custom trays manufactured by fused deposition modeling (FDM) on the accuracy of partially edentulous definitive casts have not been thoroughly explored.Failure load of milled, 3D-printed, and conventional chairside-dispensed interim 3-unit fixed dental prostheses
New techniques and materials for the laboratory fabrication of interim fixed dental prostheses have gained in popularity, yet how their failure strengths compare with conventional chairside materials is unclear.Atraumatic intraoral scans and virtual hybrid casts for custom implant abutments and zirconia implants: Accuracy of the workflow
Making impressions of 2-piece implants is typically associated with the repeated disassembly and reassembly of superstructures and related to soft-tissue trauma. Intraoral scanning of 1-piece zirconia implants is problematic because scan bodies are not readily available. Whether using virtual hybrid casts generated by merging intraoral scan data with the known surface geometry of abutments can solve these difficulties is not clear because data on accuracy of the workflow are sparse.Evaluation of the 3D error of 2 face-scanning systems: An in vitro analysis
Facial scanning systems have been developed as auxiliary tools for diagnosis and planning in dentistry. However, little is known about the trueness of these free software programs and apps for facial scanning.Volumetric and dimensional accuracy assessment of CAD-CAM–manufactured dental prostheses from different materials
In computer-aided design and computer-aided manufacturing (CAD-CAM) dentistry, the CAD of the prosthesis represents the clinical prerequisite design to restore the treated tooth. However, how closely the CAM prosthesis shape matches the CAD, particularly in relation to different materials, is unclear.Cost and effectiveness of 3-dimensionally printed model using three different printing layer parameters and two resins
When 3-dimensional printing casts, the operator can change the type of resin and the printing layer thickness, reducing the fabrication time. However, how these parameters affect the accuracy of 3-dimensionally printed casts is unknown.Trueness and precision of complete-arch photogrammetry implant scanning assessed with a coordinate-measuring machine
Photogrammetry technology has been used for the digitalization of multiple dental implants, but its trueness and precision remain uncertain.Influence of base design on the manufacturing accuracy of vat-polymerized diagnostic casts: An in vitro study
Vat-polymerized casts can be designed with different bases, but the influence of the base design on the accuracy of the casts remains unclear.Accuracy of intraoral scans: An in vivo study of different scanning devices
The accuracy of intraoral scanners is a prerequisite for the fabrication of dental restorations in computer-aided design and computer-aided manufacturing (CAD-CAM) dentistry. While the precision of intraoral scanners has been investigated in vitro, clinical data on the accuracy of intraoral scanning (IOS) are limited.Three-dimensional analysis of the accuracy of conventional and completely digital interocclusal registration methods
Compared with the frequent investigations into the accuracy of digital intraoral scans, studies analyzing digital determinations of jaw relationships based on intraoral scans are scarce.Trueness of a device for intraoral scanning to capture the angle and distance between implants in edentulous mandibular arches
The digitalization of completely edentulous arches presents limitations because of the lack of anatomic structures for best-fit alignment during the image generation process of the scanner’s software program.Accuracy of a patient 3-dimensional virtual representation obtained from the superimposition of facial and intraoral scans guided by extraoral and intraoral scan body systems
A patient 3-dimensional virtual representation aims to facilitate the integration of facial references into treatment planning or prosthesis design procedures, but the accuracy of the virtual patient representation remains unclear.Comparative study of the accuracy of an implant intraoral scanner and that of a conventional intraoral scanner for complete-arch fixed dental prostheses
Most of the available digital systems are designed to image teeth and soft tissue rather than dental implants. However, although some are marketed specifically to record implant position, whether these products are better for implant scanning is unclear.Comparison of the acquisition accuracy and digitizing noise of 9 intraoral and extraoral scanners: An objective method
The quality of the digital cast obtained from an intraoral scanner is an important comparison parameter for computer-aided design and computer-aided manufacturing (CAD-CAM) restorations. However, data on cast quality are typically provided by manufacturers, and objective evaluation of these devices is lacking.Effect of additive manufacturing process and storage condition on the dimensional accuracy and stability of 3D-printed dental casts
Additively manufactured dental casts are gaining popularity as the digital workflow is adopted in dentistry. However, studies on their dimensional accuracy and stability under different storage conditions in the dental laboratory are lacking.Trueness and precision of artificial teeth in CAD-CAM milled complete dentures with custom disks
Insufficient information is available regarding the trueness and precision of artificial teeth in computer-aided design and computer-aided manufacturing (CAD-CAM) milled complete dentures fabricated from custom disks, including prefabricated teeth.Accuracy of three digital scanning methods for complete-arch tooth preparation: An in vitro comparison
The accuracy of digital scanning for complete dental arch and implant-supported complete-arch restorations has been reported. However, research addressing the accuracy of digital scanning methods for complete-arch tooth preparation is lacking.Analysis of the influence of the facial scanning method on the transfer accuracy of a maxillary digital scan to a 3D face scan for a virtual facebow technique: An in vitro study
With the emergence of virtual articulators, virtual facebow techniques have been developed for mounting maxillary digital scans to virtual articulators. Different scanning methods can be used to obtain 3D face scans, but the influence that these methods have on the accuracy with which a maxillary digital scan is transferred to a 3D face scan is unknown.Influence of different inlay configurations and distance from the adjacent tooth on the accuracy of an intraoral scan
Clinical guidelines for obtaining accurate scan data during the intraoral scanning of inlay cavities with various configurations and interproximal distances are lacking.Correlation between 2D and 3D measurements of cement space in CAD-CAM crowns
Although the 2D analysis of prosthesis cementation space has been popular, its correlation with volumetric comparison (3D data) of cement space is unclear.Effect of layer thickness on the flexural strength of multiple-unit laser-sintered metal frameworks
Laser sintering devices have been increasingly used to fabricate the metal frameworks of metal–ceramic restorations. In the fabrication process, the sintering layer thickness is an important parameter; however, information on how it may affect the flexural strength of metal frameworks remains limited.Accuracy of impressions for multiple implants: A comparative study of digital and conventional techniques
Intraoral scanning has benefits over conventional impression making, but whether scanning is sufficiently accurate for multiple implants is unclear.
