Research: Computeraided Technology
Trueness and precision of complete-arch photogrammetry implant scanning assessed with a coordinate-measuring machinePhotogrammetry 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 studyVat-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 a patient 3-dimensional virtual representation obtained from the superimposition of facial and intraoral scans guided by extraoral and intraoral scan body systemsA 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.
Fracture resistance of additive manufactured and milled implant-supported interim crownsInterim dental prostheses can be fabricated by using subtractive or additive manufacturing technologies. However, the fracture resistance of implant-supported interim crowns fabricated by using vat-polymerization additive manufacturing methods remains unclear.
Scanning accuracy of nondental structured light extraoral scanners compared with that of a dental-specific scannerDiagnostic stone casts can be digitized by using dental optical scanners based on structured light scanning technology. Nondental structured light scanning scanners could also be used; however, the accuracy of these nondental scanners remains unclear.
Influence of scan body design on accuracy of the implant position as transferred to a virtual definitive implant castPrevious studies have analyzed factors influencing intraoral scanner accuracy; however, how the intraoral scan body design affects the implant position on the virtual definitive cast is unclear.
Comparison of conventional, photogrammetry, and intraoral scanning accuracy of complete-arch implant impression procedures evaluated with a coordinate measuring machineConventional implant impressions by using elastomeric impression material have been reported as a more reliable technique for a complete-arch implant record compared with intraoral scanner procedures. Photogrammetry technology may provide a reliable alternative to digital scanning or a conventional impression; however, its accuracy remains unclear.
Influence of printing angulation on the surface roughness of additive manufactured clear silicone indices: An in vitro studyVat-polymerization additive manufacturing (AM) technologies can be used to fabricate clear silicone indices for diagnostic trial restorations, interim restorations, and direct composite resin restorations. Different support parameters, including print orientation of the virtual design of the silicone index, need to be determined when a dental device is fabricated with AM. However, the optimal printing angulation for minimal surface texture remains unclear.
Accuracy (trueness and precision) of a dual-structured light facial scanner and interexaminer reliabilityDigital waxing procedures should be guided by facial references to improve the esthetic outcome of a restoration. The development of facial scanners has allowed the digitalization of the extraoral soft tissues of the patient’s face. However, the reliability of facial digitizers is questionable.
Intraoral digital scans: Part 2—influence of ambient scanning light conditions on the mesh quality of different intraoral scannersDigital scans should be able to accurately reproduce the different complex geometries of the patient's mouth. Mesh quality of the digitized mouth is an important factor that influences the capabilities of the geometry reproduction of an intraoral scanner (IOS). However, the mesh quality capabilities of IOSs and the relationship with different ambient light scanning conditions are unclear.
Intraoral digital scans—Part 1: Influence of ambient scanning light conditions on the accuracy (trueness and precision) of different intraoral scannersDigital scans have increasingly become an alternative to conventional impressions. Although previous studies have analyzed the accuracy of the available intraoral scanners (IOSs), the effect of the light scanning conditions on the accuracy of those IOS systems remains unclear.
Color dimensions of additive manufactured interim restorative dental materialInterim dental restorations can be fabricated by using additive manufacturing (AM) technologies. Although dental restoration contours can be easily and accurately fabricated by using computer-aided design (CAD) procedures, protocols for creating predictable color dimensions of AM interim restorations are lacking.