Papers by Oscar Figueras-Àlvarez
Advances in dentistry & oral health, Dec 13, 2016
An implant restoration in the anterior area requires careful management of soft and hard tissues ... more An implant restoration in the anterior area requires careful management of soft and hard tissues due to biological, functional and aesthetics requisites. The use of provisional restorations is necessary to create a proper emergence profile and mimic the natural dentition and their supporting gingival tissues. It also contributes to the health of peri-implant tissues and facilitates to perform a correct oral hygiene. Transferring the shape of the created emergence profile is key to fabricating the proper final restoration. This report describes a direct technique to take a final impression of an implant-supported bridge. Impression abutments and flowable composite resin were used to fill the gingival emergence profile and obtain a precise master model cast.
International Journal of Oral and Maxillofacial Surgery, 2016
The use of titanium implants is well documented and they have high survival and success rates. Ho... more The use of titanium implants is well documented and they have high survival and success rates. However, when used as reduced-diameter implants, the risk of fracture is increased. Narrow diameter implants (NDIs) of titanium-zirconium (Ti-Zr) alloy have recently been developed (Roxolid; Institut Straumann AG). Ti-Zr alloys (two highly biocompatible materials) demonstrate higher tensile strength than commercially pure titanium. The aim of this systematic review was to summarize the existing clinical evidence on dental NDIs made from Ti-Zr. A systematic literature search was performed using the Medline database to find relevant articles on clinical studies published in the English language up to December 2014. Nine clinical studies using Ti-Zr implants were identified. Overall, 607 patients received 922 implants. The mean marginal bone loss was 0.36±0.06mm after 1 year and 0.41±0.09mm after 2 years. The follow-up period ranged from 3 to 36 months. Mean survival and success rates were 98.4% and 97.8% at 1 year after implant placement and 97.7% and 97.3% at 2 years. Narrow diameter Ti-Zr dental implants show survival and success rates comparable to regular diameter titanium implants (>95%) in the short term. Long-term follow-up clinical data are needed to confirm the excellent clinical performance of these implants.
GACETA DENTAL, 2009
Page 1. Caso Clínico Dr. Óscar Figueras Álvarez ODONTÓLOGO. PRÁCTICA PRIVADA EN CENTRE DENTAL DR.... more Page 1. Caso Clínico Dr. Óscar Figueras Álvarez ODONTÓLOGO. PRÁCTICA PRIVADA EN CENTRE DENTAL DR. FIGUERAS. RUBÍ. PROFESOR MÁSTER PRÓTESIS EN LA UNIVERSITAT INTERNACIONAL DE CATALUNYA ...
The Journal of Prosthetic Dentistry, 2020
Materials
Statement of problem: Nowadays, milling is still the gold standard for fabricating indirect resto... more Statement of problem: Nowadays, milling is still the gold standard for fabricating indirect restorations, but to overcome its disadvantages, there are alternatives, such as 3D printing. Purpose: This study aimed to compare the gaps between the prepared tooth and milled and printed onlays fabricated with the same CAD design. It also aimed to determine the gap reproducibility across onlays fabricated by 3D printing and milling. Methods: A resin tooth was prepared for an onlay. After scanning the preparation, an onlay was designed with proprietary dental software. Next, 22 onlays were milled in a graphene-reinforced PMMA disc (Group 1), and 22 onlays were 3D-printed with a hybrid composite material (Group 2). After that, all fabricated restorations were scanned and superimposed on the scanned prepared resin tooth. Subsequently, a specific software was used to measure the margin, central, and intaglio-located gap between the milled or printed restoration and the preparation. Finally, me...
Journal of Prosthetic Dentistry, Apr 1, 2021
Journal of Prosthodontics, May 19, 2021
This paper aims to describe an intraoral scanning protocol for indirect restorations utilizing de... more This paper aims to describe an intraoral scanning protocol for indirect restorations utilizing dental dam isolation. This technique consists of the initial scan of both arches and their occlusion. Then, after necessary dental preparation is performed under isolation with a dental dam, intraoral scanning of preparations is performed, maintaining the dental dam in place. The proposed protocol shortens the operative time minimizing clinical factors that can affect the scan accuracy and maximizing preparation margins' visibility, ensuring a stress-free environment. This method can be applied for chair-side dentistry and conventional workflow for sending scans to the laboratory technician.
Journal of Prosthetic Dentistry, Sep 1, 2014
New technologies have led to the introduction of new materials, so an evaluation of the adhesion ... more New technologies have led to the introduction of new materials, so an evaluation of the adhesion of ceramics to these materials is needed. The purpose of this study was to compare the shear bond strength of dental porcelain to cast, milled, and laser-sintered cobalt-chromium alloys, and to investigate the adhesive bond and failure type after thermocycling, 90 metal cylinders (10 mm diameter and 10 mm height) were prepared from cast (30 specimens), milled (30 specimens), and laser-sintered (30 specimens) alloys. Ceramic cylinders (2.5 mm diameter and 4 mm length) were fused to the alloy cylinders. For each group, 15 specimens were thermocycled 5500 times at temperatures between 4°C and 60°C before testing. After testing, the specimen surfaces were visually examined to determine the failure mode. Differences in adhesion values according to manufacturing method, testing condition (thermocycling or no thermocycling), and interaction between the factors were evaluated with a 2-way ANOVA. The χ(2) test (95% confidence level) was performed to determine whether the failure mode was associated with the testing condition. Adhesion strengths for the nonthermocycled specimens were 42.79 ±14.14 MPa (cast), 37.56 ±9.18 MPa (milled), and 29.09 ±6.95 MPa (laser-sintered), and, for the thermocycled specimens, 16.52 ±8.96 MPa (cast), 22.21 ±13.25 MPa (milled), and 24.28 ±10.13 MPa (laser-sintered). Two-way ANOVA results indicated no statistically significant differences in adhesion among the manufacturing methods (P=.257), but statistically significant differences were observed according to both testing conditions (P<.001) and interaction between the factors (P=.015). The χ(2) test indicated that the failure mode was not associated with the testing condition (thermocycled, P=.280; nonthermocycled, P=.240). The porcelain adhesion values for all the materials were adequate for clinical applications. No significant adhesion differences were observed between cast, milled, and laser-sintered specimens, or among thermocycled and nonthermocycled laser-sintered specimens. However, significant adhesion differences were observed among the thermocycled and nonthermocycled cast and the milled specimens.
Journal of Dentistry, Aug 1, 2022
BACKGROUND The interarch space is defined as the vertical space between the edentulous ridge and ... more BACKGROUND The interarch space is defined as the vertical space between the edentulous ridge and the occlusal or incisal aspect of the opposing arch. Measuring the interarch space in a patient requiring an implant-supported fixed prosthesis is crucial for determining the prostheses to be used in each clinical situation. Depending on the measurements and other factors, such as the need for lip support or pink esthetics issues, decisions about the most convenient type of implant-supported prosthesis can be taken. Analogic workflow to measure the interarch space can represent a time-consuming and costly procedure that may lead to inaccuracies. OBJECTIVE It is aimed to describe a step-by-step protocol to measure the upper and lower interarch space with open-access software from the digital scan of the patient's complete dentures obtained with an intraoral scanner. METHODS An extraoral scan (using an intraoral scanner) of the existing complete removable prosthesis is required to assess the interarch space for making an implant-supported prosthesis treatment planning. If the existing complete denture does not fulfill the required functional and esthetic parameters, a complete interim denture, a wax trial denture, or a printed denture prototype should be previously fabricated. The antagonist arch and the intermaxillary record scan also need to be obtained. Finally, all STL files are imported into an open-access software for measuring the interarch space. RESULTS Open-source software can be used to measure the upper and lower interarch space from existing complete dentures following the step-by-step protocol outlined in this paper CONCLUSION: : Interarch space of edentulous patients rehabilitated with complete dentures can be measured with a 360 degrees scanning of the existing complete dentures and open-access software by applying the protocol outlined in this paper. CLINICAL RELEVANCE The clinician can assess and digitally measure the interarch space of edentulous patients requiring an implant-supported fixed prosthesis using free software by following the step-by-step protocol outlined in this paper.
Journal of Prosthetic Dentistry, Nov 1, 2014
International Journal of Prosthodontics, May 1, 2017
This assignment applies to all translations of the Work as well as to preliminary display/posting... more This assignment applies to all translations of the Work as well as to preliminary display/posting of the abstract of the accepted article in electronic form before publication. If any changes in authorship (order, deletions, or additions) occur after the manuscript is submitted, agreement by all authors for such changes must be on file with the Publisher. An author's name may be removed only at his/her written request. (Note: Material prepared by employees of the US government in the course of their official duties cannot be copyrighted.
Journal of Prosthetic Dentistry, Dec 1, 2022
Journal of Prosthetic Dentistry, Sep 1, 2022
Journal of Prosthetic Dentistry, Mar 1, 2022
This is a PDF file of an article that has undergone enhancements after acceptance, such as the ad... more This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.
Journal of Prosthetic Dentistry, Jun 1, 2021
Removing cement-retained implant-supported prostheses may be challenging for clinicians. A method... more Removing cement-retained implant-supported prostheses may be challenging for clinicians. A method combining a cone beam computed tomography (CBCT) and a digital scan with a virtual surgical planning software program is described to identify the perforation site of a cementretained implant-supported prosthesis to locate the abutment screw.
Journal of Prosthodontics, 2021
This paper aims to describe an intraoral scanning protocol for indirect restorations utilizing de... more This paper aims to describe an intraoral scanning protocol for indirect restorations utilizing dental dam isolation. This technique consists of the initial scan of both arches and their occlusion. Then, after necessary dental preparation is performed under isolation with a dental dam, intraoral scanning of preparations is performed, maintaining the dental dam in place. The proposed protocol shortens the operative time minimizing clinical factors that can affect the scan accuracy and maximizing preparation margins' visibility, ensuring a stress‐free environment. This method can be applied for chair‐side dentistry and conventional workflow for sending scans to the laboratory technician.
Journal of Dentistry, 2021
BACKGROUND An interim hollow shell (IHS) is a temporary prosthesis that adapts like a cap over a ... more BACKGROUND An interim hollow shell (IHS) is a temporary prosthesis that adapts like a cap over a prepared tooth abutment. Using a conventional protocol to fabricate IHS from casts of the initial situation or the wax-up can be challenging, time-consuming, and sometimes frustrating. A digital workflow makes this process quicker and more convenient. The IHS must be first designed with computer-aided design (CAD), then fabricated with computer-aided manufacture (CAM). Proprietary dental software is commonly used for the design process but needs to be purchased. OBJECTIVE To describe a step-by-step technique for designing an IHS for posterior relining with open-source software. METHODS This paper describes a straightforward procedure to design an IHS from a dental scan of the initial situation or a digital wax-up for an esthetic and functional temporary rehabilitation. RESULTS An IHS can be quickly designed using open-source software by copying an existing restoration or a conventional or digital wax-up. Then, the design can be 3D printed using a biocompatible resin. CONCLUSIONS The clinician can use open-source software to design IHSs, which are then 3D printed using a biocompatible resin. CLINICAL RELEVANCE The clinician can design IHSs from a dental scan of the initial situation or a wax-up using open-source software by following the step-by-step protocol outlined in this paper. The restoration can then be 3D printed using a biocompatible resin.
The Journal of Prosthetic Dentistry, 2020
Management of Helicobacter pylori infection is still a challenging matter. The aim of eradication... more Management of Helicobacter pylori infection is still a challenging matter. The aim of eradication of H. pylori is to cure peptic ulcer and decrease the risk of gastric cancer. The prevalence of H. pylori infection is high in developing countries and the burden of gastric cancer in developing countries is large since H. pylori has the potential to increase the risk of gastric cancer. Over the past decade, the efficacy of the standard first-line triple therapy has declined and increased resistance to antibiotics, especially clarithromycin, is considered the most important cause. Attempts to overcome eradication failure have been made. Sequential therapy, quadruple therapy and various combinations of new (quinolone or rifabutin) and old antibiotics have been introduced. This review will give an overview on the dramatic fall in eradication rates all over the world and introduce newer attempts providing promising results.
Journal of Prosthetic Dentistry, Jul 1, 2010
The primary concern with cement-retained implant restorations is retrievability. A simple method ... more The primary concern with cement-retained implant restorations is retrievability. A simple method is described that allows identification of the location of the abutment screw in cement-retained implant restorations by superposition of 2 digital photographs of the definitive cast with and without the restoration.
Materials, 2021
In the literature, many researchers investigated static loading effects on an implant. However, d... more In the literature, many researchers investigated static loading effects on an implant. However, dynamic loading under impact loading has not been investigated formally using numerical methods. This study aims to evaluate, with 3D finite element analysis (3D FEA), the stress transferred (maximum peak and variation in time) from a dynamic impact force applied to a single implant-supported prosthesis made from different materials. A 3D implant-supported prosthesis model was created on a digital model of a mandible section using CAD and reverse engineering. By setting different mechanical properties, six implant-supported prostheses made from different materials were simulated: metal (MET), metal-ceramic (MCER), metal-composite (MCOM), carbon fiber-composite (FCOM), PEEK-composite (PKCOM), and carbon fiber-ceramic (FCCER). Three-dimensional FEA was conducted to simulate the collision of 8.62 g implant-supported prosthesis models with a rigid plate at a speed of 1 m/s after a displacemen...
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Papers by Oscar Figueras-Àlvarez