Publications by authors named "Miguel Gomez-Polo"
Purpose: To assess the impact of involuntary interruptions (simulating tracking loss by moving the scanner out of its focal distance) and voluntary interruptions (pressing the scanner's turn-on button) on the accuracy of implant-supported full-arch scans using an intraoral scanner (TRIOS 5, version 22.1.10; 3Shape; Copenhagen, Denmark).
View Article and Find Full Text PDFPurpose: To evaluate the accuracy of intraoral scanners (IOSs) for fabricating inlay, onlay, and veneer restorations.
Materials And Methods: A literature search was completed in five databases: PubMed/Medline, Scopus, Embase, Web of Science, and Cochrane. A manual search was also conducted.
Objectives: To classify the complete-arch implant scanning techniques recorded by using intraoral scanners (IOSs).
Overview: Different implant scanning techniques have been described for recording complete-arch implant scans by using IOSs. However, dental literature lacks on a classification of these implant scanning techniques.
Objectives: To measure the influence of scanning pattern on the accuracy, time, and number of photograms of complete-arch intraoral implant scans.
Methods: A maxillary edentulous patient with 7 implants was selected. The reference implant cast was obtained using conventional methods (7Series Scanner).
Purpose: The purpose of this systematic review and meta-analysis was to compare the influence of fabrication method (conventional, subtractive, and additive procedures) and manufacturing trinomial (technology, printer, and material combination) on the marginal and internal fit of cobaltchromium (Co-Cr) tooth-supported frameworks.
Materials And Methods: An electronic systematic review was performed in five data bases: MEDLINE/PubMed, Embase, World of Science, Cochrane, and Scopus. Studies that reported the marginal and internal discrepancies of tooth-supported Co-Cr additive manufacturing (AM) frameworks were included.
Objectives: To measure the impact of the superimposition methods on accuracy analyses in digital implant research using an ISO-recommended 3-dimensional (3D) metrology-grade inspection software.
Materials And Methods: A six-implant edentulous maxillary model was scanned using a desktop scanner (7Series; DentalWings; Montreal, Canada) and an intraoral scanner (TRIOS 4; 3Shape; Copenhagen, Denmark) to generate a reference and an experimental mesh, respectively. Thirty experimental standard tesselletion language (STL) files were superimposed onto the reference model's STL using the core features of six superimposition methods, creating the following groups: initial automated pre-alignment (GI), landmark-based alignment (G1), partial area-based alignment (G2), entire area-based alignment (G3), and double alignment combining landmark-based alignment with entire model area-based alignment (G4 ) or the scan bodies' surface (G5).
Article Synopsis
- The text reviews current AI applications that aid in digital data collection and implant planning in dentistry.
- AI technologies are integrated into facial scanners, intraoral scanners, cone beam computed tomography, and jaw trackers to enhance accuracy and efficiency in data acquisition.
- Key features of these applications include automatic scan alignment, noise reduction, anatomical identification, and automated implant placement, improving the overall workflow in implant procedures.
Article Synopsis
- The study investigates how different ambient color lighting affects the accuracy of intraoral scans using two types of intraoral scanners (IOSs).
- The research found that both scanners showed significant variations in accuracy based on the color of the lighting, with specific colors yielding the best results for each scanner.
- Ultimately, the findings suggest that the ideal ambient lighting conditions need to be tailored separately for each IOS to achieve optimal scanning accuracy.
Statement Of Problem: Multiple factors can influence the accuracy of intraoral scanners (IOSs). However, the impact of scan extension and starting quadrant on the accuracy of IOSs for fabricating tooth-supported crowns remains uncertain.
Purpose: The purpose of the present in vitro study was to measure the influence of scan extension (half or complete arch scan) and the starting quadrant (same quadrant or contralateral quadrant of the location of the crown preparation) on the accuracy of four IOSs.
Statement Of Problem: An artificial-intelligence (AI) based program can be used to articulate scans in maximum intercuspal position (MIP) or correct occlusal collisions of articulated scans at MIP; however, the accuracy of the AI program determining the MIP relationship is unknown.
Purpose: The purpose of the present clinical study was to assess the influence of intraoral scanner (IOS) (TRIOS 5 or i700) and program (IOS or AI-based program) on the accuracy of the MIP relationship.
Material And Methods: Casts of a participant mounted on an articulator were digitized (T710).
Article Synopsis
- Photogrammetry is considered a reliable digital method for recording implant positions, but its accuracy factors are not fully understood.
- This study aims to evaluate how different implant references affect the accuracy of complete arch implant scans taken with a photogrammetry system.
- Results from testing indicated significant differences in linear and angular accuracy among different implant references, with the right first molar reference yielding the highest accuracy and precision.
Purpose: To measure the impact of the scanning distance on the accuracy of complete-arch implant scans acquired by using a photogrammetry (PG) system.
Material And Methods: An edentulous cast with 6 implant abutment analogs was obtained. A brand new implant scan body was positioned on each implant abutment and digitized using an extraoral scanner (T710; Medit) and the reference file was obtained.
Statement Of Problem: The extraction of fractured abutment screws can be a difficult challenge to overcome.
Purpose: To compare the removal capacity, dental implant connection damage, and time required to remove the fractured abutment screws between three drilling techniques and a conventional method.
Materials And Methods: A total of 180 prefabricated screw-retained abutments were intentionally fractured in internal connection dental implants after being subjected to a cyclic load and a static compression load.
Objective: The purpose of the present study was to assess the influence of color temperature and illuminance of ambient light on the accuracy of different intraoral scanners (IOSs) in complete-arch implant scans.
Methods: An edentulous model with six implants and scan bodies was digitized by using a laboratory scanner (DW-7-140; Dental Wings) to obtain a reference mesh. Fifteen scans were performed employing two intraoral scanners (Trios 4;3Shape A/S and i700; Medit Co) at two illuminances (500 and 1000 lux) and three color temperatures (3200, 4400, and 5600 K).
Article Synopsis
- The study examines how the roughness of surfaces in complete-arch implant-supported prostheses affects the adhesion and retention of microorganisms and compares four different CAD-CAM materials.
- Forty milled prostheses were categorized into four groups based on two high-performance polymers and two types of zirconia, with surface roughness measured before and after an aging process that involved thermocycling.
- Results showed that while all materials maintained similar initial surface roughness after aging, zirconia specifically experienced increased roughness, and the performance of the polymer materials was comparable or slightly better than that of zirconia.
No gingival shade guide exists that can be used as a 'gold standard' in gingival shade selection. This research, therefore, aimed to determine whether comparable results in subjective gingival shade selection can be achieved using basic gingival colours produced by distinct manufacturers. It also aimed to explore how coverage of the colour space is affected by mixing these basic colours to create additional shades.
View Article and Find Full Text PDFArticle Synopsis
- This study investigated the microgaps present at the implant-abutment interface for two types of dental abutments used with monolithic zirconia partial implants: transepithelial versus titanium base.
- Sixty dental implants were tested, with one group using transepithelial abutments and the other using Ti-base abutments, subjected to simulations mimicking real-life conditions.
- Results showed that the transepithelial abutments had significantly smaller microgaps (0.270 μm) compared to the Ti-base abutments (3.902 μm), but both types remained within clinically acceptable limits.
Article Synopsis
- The study aims to examine the discrepancies between occlusal device designs made by an experienced dental technician and two AI design programs, focusing on overall and specific surface discrepancies.
- Using standardized STL files, the research compares designs from a technician and the AI programs, Medit Splints and Automate, controlling for design parameters and materials.
- Statistical analyses were performed to determine differences in design accuracy between the groups, utilizing methods like root mean square error and Kruskal-Wallis tests.
Statement Of Problem: Research into the coverage error (CE) of gingival systems that have been expanded by using ceramic specimens created by mixing basic colors is lacking.
Purpose: The purpose of this in vitro study was to compare the CEs of 3 ceramic gingival color systems that have been expanded with basic-color mixtures from a sample of 360 White participants and to classify the participants according to the accuracy of the shade match achieved with each system.
Material And Methods: L*a*b* color coordinates were recorded in 3 zones of attached gingiva for 360 White participants with healthy gingival tissue (187 men and 173 women).
Objectives: To describe a new classification for intraoral scans based on the scan extension and to introduce a decision guideline to choose the scan extension for fabricating tooth- and implant-supported fixed dental prostheses (FDPs).
Overview: Multiple operator- and patient-related factors have been identified that can decrease the scanning accuracy of intraoral scanners (IOSs), including scan extension. However, the decision criteria for selecting scan extension for fabricating tooth- and implant-supported restorations is unclear.
Objective: To review the factors that influence the accuracy of the maxillomandibular relationship at maximum intercuspation (MIP) acquired by using intraoral scanners (IOSs).
Material And Methods: A systematic search was performed using five databases: MEDLINE/PubMed, Cochrane, Embase, World of Science, and Scopus. A manual search was also completed.
Purpose: To evaluate the influence of implant scan body (ISB) design (height, diameter, geometry, material, and retention system) on the accuracy of digital implant scans.
Material And Methods: A literature search was completed in five databases: PubMed/Medline, Scopus, Embase, World of Science, and Cochrane. A manual search was also conducted.
Purpose: To evaluate the accuracy of complete-arch digital implant impressions using different intraoral scan body (ISB) materials and intraoral scanners (IOSs).
Materials And Methods: The mandibular dental cast of an edentulous patient with six tissue-level dental implants was used as the master cast. Two types of ISBs-polyether ether ketone (PEEK) and plasma-coated medical titanium-were used with five IOSs: TRIOS 4 (T4), Virtuo Vivo (VV), Medit i700 (Mi700), iTero 5D (i5D), and Primescan (PS).
Article Synopsis
- Immediate implants and alveolar sealing have high predictability and biological benefits, with advancements in technology simplifying the clinical workflow.
- The report describes a comprehensive digital process for immediate implant placement, provisionalization, and definitive crown fabrication while preserving the natural tooth's gingival contours.
- This technique enhances patient comfort and reduces the need for multiple appointments and disconnections between the abutment and implant, making it a valuable approach in posterior dental implants.