A digital workflow for full-arch implant fixed prosthesis: Clinical application of a 3D-printed polychromatic flangeless trial denture, anatomic bone reduction guide, and intraoral scanning for definitive prosthesis fabrication.

This clinical report presents a comprehensive digital workflow for rehabilitating a patient with maxillary terminal dentition using a full-arch, implant-supported fixed dental prosthesis (FP-1). It highlights the integration of a 3D-printed polychromatic flangeless trial denture and a customized anatomic bone reduction template, enabling prosthetically driven implant planning and optimal bone architecture modification. The workflow incorporated fully guided implant surgery using sequential templates and immediate loading with a closed-mouth pickup system.

Technique for retrieving a locked implant-supported bar overdenture following direct attachment pick-up procedure.

Implant-assisted complete dentures, particularly those utilizing implant-supported bar systems (RP-4), offer significant advantages in patient satisfaction and prosthetic function compared to conventional dentures. However, complications can arise during the direct intraoral pick-up procedure, such as inadvertent resin polymerization in undercut areas, which may lock the overdenture in place. This report introduces a predictable, digitally guided technique to retrieve a locked implant-supported bar overdenture using the original digital design to locate screw access channels and guide targeted occlusal drilling.

Trueness of artificial intelligence-based, manual, and global thresholding segmentation protocols for human mandibles.

Purpose: To compare the trueness of artificial intelligence (AI)-based, manual, and global segmentation protocols by superimposing the resulting segmented 3D models onto reference gold standard surface scan models.

Materials And Methods: Twelve dry human mandibles were used. A cone beam computed tomography (CBCT) scanner was used to scan the mandibles, and the acquired digital imaging and communications in medicine (DICOM) files were segmented using three protocols: global thresholding, manual, and AI-based segmentation (Diagnocat; Diagnocat, San Francisco, CA).

Comparative analyses of accuracy between digital and conventional impressions for complete-arch implant-supported fixed dental prostheses-A systematic review and meta-analysis.

Purpose: To compare the three-dimensional (3D) accuracy of digital (intraoral scanning and photogrammetry) and conventional implant impressions for complete-arch implant-supported fixed dental prostheses.

Methods: A systematic search was conducted in electronic databases using relevant MeSH keywords to identify in vitro and in vivo studies comparing the 3D accuracy of digital versus conventional implant impressions. Eligible studies were included in a meta-analysis, with subgroup analyses conducted based on implant number (≤ 4 vs.

Effects of 3D-printers and manufacturer-specified post-curing units on the dimensional accuracy, compressive strength, and degree of conversion of resin for fixed dental prostheses.

Background/purpose: The 3D printer and post-curing unit are important factors in producing the best 3D printed crowns. To explore the effects of different combinations of 3D-printers and manufacturer-specified post-curing units on the dimensional accuracy, compressive strength, and degree of conversion (DC%) of 3D-printable resin for fixed dental prostheses.

Materials And Methods: Specimens were designed in 2 sizes and additively-manufactured using 2 digital light processing (DLP) 3D-printers (NextDent 5100, ND and PrintinDLP+, PN).

Influence of prosthesis type and intraoral scanner-based extraoral scanning protocol on the passive fit of CAD-CAM verification devices.

Purpose: To evaluate the impact of different complete-arch digital scanning techniques and prosthesis types on the passive fit of computer-aided design and computer-aided manufacturing (CAD-CAM) verification devices.

Materials And Methods: Two different maxillary master casts with four multi-unit abutment (MUA) implant analogs (FP-1 and FP-3 prosthesis types) were used as the basis for fabricating verification devices through two impression techniques (OptiSplint and RevEX). Group 1 utilized digital scans of splinted scanbodies reinforced with a light-polymerizing acrylic resin and metal mesh on the FP-1 cast (OptiSplint technique), Group 2 employed the same impression technique as Group 1 on the FP-3 cast, Group 3 applied digital scans of reverse scanbodies connected to a passively fitting interim prosthesis on FP-1 cast (RevEX technique), and Group 4 used the same impression technique as Group 3 on FP-3 cast.

Effects of complete-arch digital scanning techniques on the passive fit of CAD-CAM verification devices.

Purpose: To evaluate the impact of different complete-arch digital scanning techniques on the passive fit of computer-aided design and computer-aided manufacturing (CAD-CAM) verification devices.

Materials And Methods: A mandibular master cast with four multiunit abutment implant analogs was used as the basis for fabricating verification devices through three impression techniques. Group 1 employed a conventional open-tray impression technique using polyvinyl siloxane material, Group 2 utilized digital scans of splinted scanbodies reinforced with a light-polymerizing acrylic resin and metal mesh, and Group 3 applied digital scans of reverse scanbodies connected to a passively fitting interim prosthesis.

Color Stability, Surface Gloss, Surface Roughness, and Wettability of Material Jetting 3D-Printed Denture Material Under Various Surface Treatments.

To examine the effects of surface treatments on the color stability, surface roughness, surface gloss, and wettability of monolithic polychromatic material jetting (MJT) 3D-printed denture material. Twenty-one color variants of the same denture material (TrueDent; Stratasys, Eden, MN, USA) underwent two surface treatments (polishing only or polishing and glazing), creating 42 study groups with a total of 420 samples (n = 10 per group). The samples were manufactured using a PolyJet 3D printer (J5 DentaJet; Stratasys, Eden, MN, USA), a type of MJT 3D printer.

Shade variability and stability in interim and definitive tooth-colored resin-based restorative materials: Comparing manufacturer-claimed shades to a universal shade guide.

Purpose: To evaluate the shade variability and stability of interim and definitive tooth-colored restorative materials by comparing manufacturer-claimed shades to a universal shade guide before and after thermocycling.

Materials And Methods: Eight commercially available tooth-colored restorative materials were tested, including conventional, milled, and 3D-printed types. Each material was categorized into three shade subgroups (A1, A2, and A3), with 10 samples per subgroup.

Dual milling technique for manufacturing monolithic complete dentures with 3D-printed occlusal surfaces: A dental technique.

This technical report described a digital approach that utilized computer-aided design and computer-aided manufacturing (CAD-CAM) workflows, integrating digital design, selective laser melting (SLM) metal 3D-printing, and a dual milling process to fabricate monolithic complete dentures with metal occlusal surfaces. The dual milling technology ensured accurate occlusion and minimized the risk of assembly errors. This technique is indicated for patients with severe occlusal wear in acrylic denture teeth by substituting metal for the occlusal surfaces.

An in vitro assessment of the accuracy of guided tilted and axial implant placement in the edentulous mandible.

Purpose: To assess the precision of implant placement when comparing tilted orientations to axial orientations, utilizing a fully guided surgical protocol in an edentulous mandibular model.

Materials And Methods: Fourteen rubber-coated mandibular models were scanned with fiducial markers using a commercial benchtop surface scanner, followed by cone beam computed tomography for implant planning through a dual-scan protocol. The models were randomly divided into control and experimental groups.

Feasibility and accuracy of single maxillary molar designed by an implicit neural network (INN)-based model: A comparative study.

Purpose: This feasibility study aimed to develop and evaluate a novel implicit neural network (INN)-based model for the automatic reconstruction of biomimetic maxillary molar.

Material And Methods: A total of 500 sets of full dental scans containing intact right and left maxillary first molars (#3 and #14) and adjacent teeth were included in this study. The digital maxillary casts were duplicated: one set served as the original, while the other had one maxillary first molar removed.

Race to the Moon or the Bottom? Applications, Performance, and Ethical Considerations of Artificial Intelligence in Prosthodontics and Implant Dentistry.

This review aims to explore the applications of artificial intelligence (AI) in prosthodontics and implant dentistry, focusing on its performance outcomes and associated ethical concerns. Following the PRISMA guidelines, a search was conducted across databases such as PubMed, Medline, Web of Science, and Scopus. Studies published between January 2022 and May 2024, in English, were considered.

The effects of anodization and instrumentation on titanium abutment surface characteristics and biofilm formation.

Purpose: To assess the impact of anodization and instrumentation on titanium abutment surface characteristics (surface roughness and wettability) and biofilm formation (viability and mass).

Materials And Methods: Titanium discs were obtained from pre-milled abutment blanks made of titanium-6aluminum-7niobium alloy. Polished samples were divided into three groups: un-anodized, gold-anodized, and pink-anodized.

Peri-implant tissue definition and registration with a 3D-printed emergence profile former on titanium stock healing abutment: A dental technique and clinical report.

Recent focus has shifted toward refining the soft tissue emergence profile to enhance aesthetics, support peri-implant health, and ensure long-term success. Traditionally, titanium stock healing abutments or chairside-customized abutments were used to shape peri-implant tissues and develop the emergence profile for implant-supported prostheses. However, advancements in digital dentistry now allow for more precise customization and increased treatment efficiency.

Intraoral scanning for implant-supported complete-arch fixed dental prostheses (ISCFDPs): Four clinical reports.

Although there are difficulties with using intraoral scans for implant-supported complete-arch fixed dental prostheses (ISCFDPs), several commercially available systems have become helpful in simplifying the treatment process in the prosthetic phase. These systems help patients move from interim ISCFDPs to receiving definitive prostheses in just three clinical visits. This clinical report summarizes the indications, benefits, and limitations of the four systems.

Effects of post-curing light intensity on the trueness, compressive strength, and resin polymerization characteristics of 3D-printed 3-unit fixed dental prostheses.

Purpose: To investigate the effect of different post-curing light intensities on the trueness, compressive strength, and resin polymerization of 3D-printed 3-unit fixed dental prostheses (FPD).

Materials And Methods: A total of 60 specimens were prepared to support a 3-unit FDP with a deep chamfer marginal design, utilizing computer-aided design and computer-aided manufacturing (CAD-CAM) technology. Light-polymerizing FDP resin with varying light intensities (105, 210, 420, and 840 mW/cm) was employed for 10 min.

3D-Printed Zirconia and Lithium Disilicate in Dentistry and Their Clinical Applications.

This review focuses on the progressive role of 3D printing in dentistry, particularly emphasizing the use of zirconia-based and lithium disilicate (LS2)-based ceramic materials. Celebrated for their biocompatibility and esthetic resemblance to natural teeth, these materials have shown promising results with high success rates. Digital light processing (DLP) and stereolithography (SLA) have been noted for producing superior 3D-printed ceramic products.

3D-printed shell complete dentures as a diagnostic aid for implant planning and fabricating interim restorations for complete arch rehabilitations: A case series.

3D-printed shell complete dentures generated from a scan of the patient's existing prostheses can simplify and expedite the surgical planning and interim restoration design for complete arch rehabilitations. Three patients were rehabilitated with endosteal implants, and interim restorations were generated from the contours of the 3D-printed shell complete dentures used as diagnostic aids. This case series report presents the recommended protocol and its clinical progression, in addition to clinical and radiographic images of the treatment outcomes.

Trueness of the apical and middle root portion segments of 3D-printed removable die and alveolar cast designs manufactured using stereolithographic 3D printing.

Purpose: The present study evaluated the effects of the root portion design, segment (middle vs. apical), and part (die vs. cast) on the trueness of three-dimensional (3D)-printed removable die-cast complex.

Color stability of precolored and extrinsically colored monolithic multilayered polychromatic zirconia: Effects of surface finishing and aging.

Purpose: To explore the impact of zirconia types, coloring methods, and surface finishing on the color stability of monolithic multilayered polychromatic zirconia after artificial aging, including thermocycling and simulated toothbrushing.

Materials And Methods: Eighty square-shaped zirconia samples were divided into 2 types (M3Y-TZP and M6Y-PSZ), further categorized based on coloring methods (precolored and extrinsically colored) and surface finishing techniques (mechanical polishing or glazing). The color stability was assessed using the CIEDE2000 formula.

Color stability of CAD-CAM hybrid ceramic materials following immersion in artificial saliva and wine.

Purpose: To examine the color stability of 3D-printed and milled, interim, and definitive, restorative materials after immersion in artificial saliva and wine for 1, 3, and 6 months.

Material And Methods: The study used a 2 × 5 factorial design with 10 subgroups, including 2 immersion liquids (artificial saliva and wine) and 5 manufacturing technology and restorative material combinations (n = 10). Color measurements were taken using a contact-type digital spectrophotometer (CM-2600d Spectrophotometer; Konica Minolta Healthcare Americas Inc) before immersion and at 1 month (T1), 3 months (T3), and 6 months (T6) after immersion.

The impact of base design and restoration type on the resin consumption, trueness, and dimensional stability of dental casts additively manufactured from liquid crystal display 3D printers.

Purpose: To evaluate the effects of two base types and three restoration designs on the resin consumption and trueness of the 3D-printed dental casts. Additionally, the study explored the dimensional stability of these 3D-printed dental casts after 1 year of storage.

Materials And Methods: Various types of reference dental casts were specifically designed to represent three types of dental restoration fabrications, including full-arch (FA), long-span (LS), and single-unit (SU) prostheses.