Laura Ceballos

Laura Ceballos
King Juan Carlos University | URJC · Stomatology

Professor

About

137
Publications
23,422
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Introduction
Skills and Expertise

Publications

Publications (137)
Preprint
Dental caries is the major biofilm-mediated oral disease in the world. The main treatment to restore the caries lesions consist of the use of adhesive resin composites due to their good properties. However, the progressive degradation of the adhesive in the medium term makes possible the proliferation of cariogenic bacteria allowing secondary carie...
Article
Full-text available
Objectives: To evaluate the effect of the application of an additional hydrophobic bonding resin on the clinical performance of a universal adhesive applied in etch-and-rinse (ER) or self-etch adhesive (SE) strategy in non-carious cervical lesions (NCCLs) after 5 years. Materials and methods: Scotchbond Universal Adhesive (3M Oral Care) was appl...
Preprint
Objectives To evaluate the effect of the application of an additional hydrophobic bonding resin on the clinical performance of a universal adhesive applied in etch-and-rinse (ER) or self-etch adhesive (SE) strategy in non-carious cervical lesions (NCCLs) after 5 years. Materials and Methods Scotchbond Universal Adhesive (3M Oral Care) was applied i...
Article
Full-text available
Purpose: To evaluate the influence of the restorative material and matrix system on proximal contact tightness and morphological characteristics of class II restorations in primary molars. Methods: Occluso-mesial cavities in second primary artificial molars were randomly restored using different materials (Filtek Z500 or Filtek Bulk Fill composites...
Article
Background: The aim of this study was to determine the influence of the gingival margin position and the adhesive strategy selected to perform deep margin elevation (DME) in marginal sealing of resin composite inlays by a nanoleakage test. Material and methods: 12 sound third molars were selected and expulsive MOD cavities for inlays were prepar...
Article
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The aim of this study was to evaluate the effect of different concentrations of chitosan polymer on dentinal enzymatic activity by means of gelatin and in situ zymography. Human dentin was frozen and ground in a miller. Dentin powder aliquots were demineralized with phosphoric acid and treated with three different concentrations of lyophilized chit...
Preprint
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Protocolos clínicos necesarios, en endodoncia y en la reconstrucción del diente endodonciado
Article
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Aim To achieve a consensus for an undergraduate Cariology Curriculum among Spanish universities offering graduate degrees in Dentistry. Materials and Methods A Spanish Cariology Curriculum Group (SCCG) was set up with members of the Spanish Society of Epidemiology and Oral Public Health (SESPO), Spanish Society of Conservative and Aesthetic Dentis...
Article
Full-text available
Objectives To compare the shear bond strength (SBS) of the CAD/CAM material-bracket interface using three surface treatments: following manufacturers’ instructions (MI), Monobond Etch & Prime (MEP) and 9.6% hydrofluoric acid plus silane (9.6% HF), after 24 h of water storage (24 h) and 10,000 cycles of thermocycling (TC).Materials and methodsA tota...
Article
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Background: This study aimed to assess the quality of the information about COVID-19 that Spanish dentists felt they were provided; their opinion about the actions by Health Institutions; their perception of the risk infection at work; and the security measures implemented to prevent contagion. Material and methods: A specific questionnaire was...
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To compare the 1-year clinical performance of lithium disilicate and resin composite CAD/CAM onlay restorations. Twenty patients that required two restorations in posterior teeth, with at least one cusp to be covered, received two onlays. One was made with IPS e.max CAD (Ivoclar-Vivadent) and the other with Lava Ultimate (3M Oral Care). Two blind o...
Article
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The aim of the present study was to evaluate the effect of 0.1% chitosan (Ch) solution as an additional primer on the mechanical durability and enzymatic activity on dentine using an etch-and-rinse (E&R) adhesive and a universal self-etch (SE) adhesive. Microtensile bond strength and interfacial nanoleakage expression of the bonded interfaces for a...
Article
Statement of problem Zirconia restorations can be processed by using stereolithography additive manufacturing (AM) technologies. However, whether additive manufactured zirconia could achieve flexural strength values comparable with those of milled zirconia is unclear. Purpose The purpose of this in vitro study was to compare the flexural strength...
Article
Full-text available
Objectives To evaluate if the addition of a layer of a hydrophobic bonding resin to the recommended application sequence of a universal adhesive improves the respective clinical behavior in non-carious cervical lesions (NCCLs) after 36 months. Materials and methods Scotchbond Universal Adhesive (SBU, 3M Oral Care) was applied in NCCLs of 39 subjec...
Article
The aim of this study was to analyse changes in radicular dentine composition after different irrigation regimes using attenuated total reflectance Fourier‐transform infrared spectroscopy (ATR‐FTIR). Dentine slices from human single‐root teeth were immersed in: (i) 5.25% sodium hypochlorite (NaOCl) for 1, 5 and 20 min; (ii) 17% EDTA for 1 min; and...
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Background: The first state of alarm due to COVID-19 in Spain led to limit dental treatment exclusively to emergencies. The objective of the survey was to evaluate the amount and type of emergencies attended during this period, as well as to know how they were solved, and what measures were adopted to carry out dental care in these exceptional cir...
Conference Paper
Full-text available
Objectives: To evaluate the use of an analytic rubric for the evaluation of root canal treatments performed in extracted molars by undergraduate students. Methods: Fourth-year dental students of Rey Juan Carlos University (Spain) built 372 portfolios of root canal treatments performed in extracted molars during their preclinical practices. The syst...
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In this article by Carlos and colleagues (J Clin Exp Dent. 2019 Feb 1;11(2):e154-61), there is an error in the Material and Methods of the abstract. The correct Material and Methods of the abstract is: Material and Methods: A total of 120 human premolars were randomly divided into two groups (n=60) according to the orthodontic adhesive used: APC Fl...
Article
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PURPOSE: The objective was to measure the implant prosthodontic discrepancy of complete-arch implant-supported frameworks made of cobalt-chromium (Co-Cr) fabricated using selective laser melting (SLM) additive manufacturing technologies. MATERIALS AND METHODS: A completely edentulous maxillary cast with seven implant replicas was obtained. Co-Cr S...
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Background The aim of this study was to compare the shear bond strength (SBS) of a flash-free and precoated orthodontic adhesive with a compomer orthodontic adhesive before and after thermocycling. The adhesive remnant index (ARI) was also determined for both adhesives. Material and Methods The adhesive remnant index (ARI) was also determined for...
Article
Statement of problem: The polymerization of computer-aided design and computer-aided manufacturing (CAD-CAM) composite resins during their manufacture enhances their physical properties and biocompatibility but might compromise their reparability. Purpose: The purpose of this in vitro study was to determine the microtensile bond strength and nan...
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Full-text available
Statement of problem: Titanium frameworks for implant-supported prostheses can be additively manufactured using different powder-based fusion technologies, including selective laser melting (SLM) and electron beam melting (EBM). Some manufacturers have developed a technique that combines the printing of the framework with the subsequent machining...
Article
Purpose: To study the influence of a polyalkenoate copolymer (VCP) on the immediate (24 h) and 6-month dentin bonding stability of VCP-based adhesives, using microtensile bond strength (μTBS), nanoleakage (NL), and ultramorphological analyses (FE-SEM). Materials and methods: Eighty-four caries-free molars were randomly assigned to seven adhesive...
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Objective: To compare the perceptions of students and teachers of the "Educational Climate" (EC) in Spanish public dental schools. Methods: A group of 1064 students and 354 teachers from six Spanish public dental schools responded to the DREEM questionnaire. This has 50 items grouped into five subscales: perception of learning (Learning); percep...
Poster
Purpose: To evaluate the discrepancy between plaster cast and titanium framework for implant-borne complete arch prosthesis manufactured using selective laser melting (SLM) and electron beam melting (EBM) additive manufacturing technologies. Material and Methods: A complete edentulous mandibular definitive cast with 4 implant analogs and duplicate...
Article
The antibacterial efficacy of intracanal medicaments for 2 and 7 days, in open apex root canals contaminated with Enterococcus faecalis biofilms was compared. One hundred and thirty-eight standardized uniradicular human roots were inoculated with E. faecalis. Colony forming units (CFU) were recorded before and after medication. Samples were divided...
Article
Full-text available
Objectives The objective of the present study was to evaluate the influence of proximal box elevation on microtensile bond strength (mTBS) of composite inlays to the proximal box floor, using either a total-etch or a self-adhesive resin cement. Materials and methods Twenty-five human molars were selected, and a class II OM (inlay) cavity preparatio...
Article
Purpose: To evaluate the chemical interaction between synthetic hydroxyapatite (HAp) and polyalkenoic acid copolymer- based (also known as Vitrebond copolymer [VCP]) adhesives. Materials and Methods: Six dentin adhesive formulations were used: 1) Adper Single Bond Plus (SB); 2) SB formulation without VCP (SBnoVCP); 3) Adper Easy Bond (EB); 4) EB fo...
Article
Full-text available
Objectives: The objective of this study was to compare the 5-year clinical performance in posterior restorations of three restorative systems including a low-shrinkage system and a methacrylate-based composite combined either with an etch-and-rinse or a self-etch adhesive. Materials and methods: Each of 25 patients received three class I (occlus...
Article
The aim of the present study was to assess whether different dentin conditioning protocols with different acids [phosphoric acid, ethylene diamine tetra acetic acid (EDTA), and polyacrylic acid (PAA)] influence the bond strength of fiber posts along the radicular depth when luted with self-adhesive resin cement. Twenty single-rooted teeth were rand...
Article
Statement of problem: Additional polymerization of indirect composite resins enhances their physical properties but lessens the potential for chemical bonding. Purpose: The purpose of this in vitro study was to evaluate the influence of different surface treatments and 6-month water storage on the microtensile bond strength (μTBS) of composite r...
Article
Purpose: To evaluate the chemical interaction between synthetic hydroxyapatite (HAp) and polyalkenoic acid copolymer (also known as Vitrebond copolymer [VCP])-based adhesives. Materials and Methods: Six dentin adhesive formulations were used: 1) Adper Single Bond Plus (SB); 2) SB formulation without VCP (SBnoVCP); 3) Adper Easy Bond (EB); 4) EB for...
Article
Full-text available
Introduction: Self-etch adhesives are becoming more widely used. Their acidity can vary greatly. This determines the degree of infiltration into hard dental tissues and its adhesive ability. Objective: To determine the effect of thermocycling and pre-etching with orthophosphoric acid on the adhesive resistance of different self-etching adhesives....
Article
Purpose: To investigate the effect of different repair procedures and storage time on microtensile bond strength (mu TBS) of a resin composite to an older one from a simulated previous restoration. Methods: Composite disks were made by layering 2 mm-thick increments of a nanohybrid composite (Grandio) shade Al in a Teflon mold (4x8 mm). Afterwards,...
Article
Full-text available
The aim of the study is to determine the influence of the type of bracket, on bond strength, microhardness and conversion degree (CD) of four resin orthodontic cements. Micro-tensile bond strength (µTBS) test between the bracket base and the cement was carried out on glass-hour-shaped specimens (n=20). Vickers Hardness Number (VHN) and micro-Raman...
Article
This study evaluated the effects of several low-concentration bleaching products on microtensile bond strength (µTBS) to enamel at different elapsed times after the bleaching treatment. One hundred and fifty bovine incisors were divided into five groups: No treatment, 10% carbamide peroxide (Opalescence), 10% hydrogen peroxide (Opalescence Treswhit...
Article
Full-text available
Background: No specific indications about the pre-treatment of indirect composite restorations is provided by the manufacturers of most self-adhesive resin cements. The potential effect of silane treatment to the bond strength of the complete tooth/indirect restoration complex is not available.The aim of this study was to determine the contributio...
Article
Objectives There are many works that have attempted to estimate the fracture toughness of enamel by indentation techniques using equations whose success in determining the actual value of fracture toughness, rely on a particular three-dimensional pattern consisting of cracks growing from the edges of the indentation. Recently, an alternative method...
Conference Paper
Objective: The aim of the present study was to assess microroughness and microchemical changes of enamel surfaces after bleaching procedures with several low concentration bleaching products. Method: Forty bovine incisors were sectioned into two halves to obtain experimental and control specimens. The teeth were randomly divided into four groups...
Conference Paper
Objective: To investigate the effect of different surface treatments on microtensile bond strength (µTBS) when repairing a resin composite (Grandio®, VOCO). Methods: Composite disks were made by layering 2 mm thick increments of the nanohybrid Grandio composite shade A1 in a Teflon mold (4x8 mm). Disks were light-cured for 40s (Elipar S10, 3M ESP...
Article
To carry out a psychometric evaluation of the Spanish-language version of the Dundee Ready Education Environment Measure (DREEM) applied to dental students. A total of 1,391 students from nine Spanish public schools of dentistry responded to the DREEM questionnaire. To analyse the reliability of the DREEM questionnaire, the internal consistency was...
Conference Paper
Objective: To determine stiffness, hardness, Young’s modulus and reduced modulus in cervical radicular intertubular dentin after 17% EDTA or 5.25% NaOCl treatment. Method: Three single root teeth were selected and stored in 0.1% thymol solution. Root canals were instrumented with Universal Protaper System (Denstply, Tulsa, OK, USA) and irriga...
Conference Paper
Objective: To measure the number of resin tags formed by several dual-cure resin cements used to lute fiber posts. Method: Twelve human roots were endodontically treated and post spaces were prepared to lute fiber posts (FRC Postec Plus, Ivoclar-Vivadent). Roots were randomly divided into 4 groups (n=3) according to the resin cement used: a self-...
Article
To analyse the 'Educational Climate' (EC) of dental students in Spain. The study group consisted of 1391 students from nine Spanish Public Schools of Dentistry, who responded to the questionnaire based on 'Dundee Ready Education Environment Measure' (DREEM). This questionnaire has 50 items that are grouped into five domains: Learning, Teachers, Aca...
Article
The aim of the present study was to evaluate the influence of erbium:yttrium-aluminum-garnet (Er:YAG) and Ti:sapphire laser irradiation on the microtensile bond strength (MTBS) of three different adhesive systems to dentin. Flat dentin surfaces from 27 molars were divided into three groups according to laser irradiation: control, Er:YAG (2,940 nm,...
Article
Objectives: The aim of this study was to compare the two-year clinical performance of three restorative systems in posterior restorations, which included a low-shrinkage composite and both etch-and-rinse and self-etch adhesive strategies. Materials and methods: After signing an informed consent, 25 patients received three Class I (occlusal) or C...
Article
Objectives: To evaluate the effect of adhesive application on the shear bond strength (SBS) of orthodontic tubes to acid-etched human enamel when using different flowable composite resins and the APC Plus system (APC). Study design: One hundred metal tubes were bonded to human third molars, which were randomly divided into five groups: Tetric EvoFl...
Article
Many works have attempted to estimate the fracture toughness of enamel by indentation techniques. Most of these works have in common the use of equations whose success in determining the actual value of fracture toughness depends on the particular three-dimensional pattern of cracks. Although microscopic techniques are usually employed, only a supe...