The Clinical Potential of 3D-Printed Crowns Reinforced with Zirconia and Glass Silica Microfillers

Abstract

The development of 3D-printed crown resin materials with improved mechanical and physical properties is an area of growing interest in dentistry. This study aimed to develop a 3D-printed crown resin material modified with zirconia glass (ZG) and glass silica (GS) microfillers to enhance overall mechanical and physical properties. A total of 125 specimens were created and divided into five groups: control unmodified resin, 5% either ZG or GS reinforced 3D-printed resin, and 10% either ZG or GS reinforced 3D-printed resin. The fracture resistance, surface roughness, and translucency parameter were measured, and fractured crowns were studied under a scanning electron microscope. The results showed that 3D-printed parts that were strengthened with ZG and GS microfillers demonstrated comparable mechanical performance to unmodified crown resin but resulted in greater surface roughness, and only the group that contained 5% ZG showed an increase in translucency. However, it should be noted that increased surface roughness may impact the aesthetics of the crowns, and further optimisation of microfillers concentrations may be necessary. These findings suggest that the newly developed dental-based resins that incorporate microfillers could be suitable for clinical applications, but further studies are necessary to optimise the nanoparticle concentrations and investigate their long-term clinical outcomes.

Evaluating the Translucency, Surface Roughness, and Cytotoxicity of a PMMA Acrylic Denture Base Reinforced with Bioactive Glasses

“…Prior to conducting the measurements, the spectrophotometer was calibrated following the manufacturer's instructions, which involved using a black trap and a white tile. The translucency parameters (TP) were subsequently calculated by determining the differences in the L*, a*, and b* values recorded against white (W) and black (B) backgrounds, employing the formula provided below [22]:…”

Use of Biomaterials in 3D Printing as a Solution to Microbial Infections in Arthroplasty and Osseous Reconstruction

“…There are currently several 3D printing technologies available, classified under the ISO/ASTM52900-21 standard [ 24 ]. Amongst the many different applications of such techniques in medicine, a prominent one, perhaps the most prominent, is the development of prostheses for a variety of surgical procedures; such prostheses improve both the outcome and quality of life of the patients [ 25 , 26 , 27 , 28 ] by solving or at least mitigating some of the problems associated with surgical interventions.…”

3D-printed resin composite posterior fixed dental prosthesis: a prospective clinical trial up to 1 year

“…The mechanical properties, such as fracture and fatigue strengths, of resin composite CAD/CAM materials have been evaluated in several in vitro studies (13,14). In addition to this in vitro literature, the results of studies considering clinical performances of single crown restorations fabricated with resinbased CAD/CAM materials indicate that these treatment alternatives supported with teeth have a favorable short-term survival rate (15,16). 3D printing technology contributes to the way dental restorations are created, allowing more precise and accurate restorations to be printed rather than traditional methods of creating dental restorations, such as using molds and physical models.…”

“…However, in the literature the indication of CAD/CAM resin composite materials is generally limited to permanent singletooth restorations. Therefore, the question of whether 3D-printed restoration materials, such as resin composites, are suitable alternatives for the indication of use for such multi-unit fixed dental prostheses (FDPs) is an important issue for resin composites with their increasing use in current dentistry (16). Despite the increasing popularity of the 3D printing technique among technicians and dentists, due to its wide variety of materials and related applications as well as ease of use (17), there is currently a lack of evidence regarding the mechanical properties as well as the clinical outcomes of 3D-printed materials designed for both temporary and permanent restorations.…”