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Heliyon Dec 2023The relation between cement color and abutment substrate material and the corresponding effect on the color accuracy of high-transparency pre-colored zirconia (HT-Zr)...
STATEMENT OF PROBLEM
The relation between cement color and abutment substrate material and the corresponding effect on the color accuracy of high-transparency pre-colored zirconia (HT-Zr) remains unclear.
PURPOSE
This in-vitro study aimed to investigate the difference in color accuracy when the HT-Zr is bonded to different materials-based substrates with differently colored resin cement.
MATERIALS AND METHODS
Vita A1 shade HT-Zr with 1 mm thickness was used as the testing sample. The samples were first placed on zirconia (ZR), tooth color resin (CR), and metallic (MT) abutment substrates. Subsequently, four differently colored cements (translucent (TR), bleach, opaque, and A2 shade (A2)) were used for bonding HT-Zr onto the substrate, and the non-bonded group was used as the control group (CG). There were 15 groups in total (n = 10 per group). A digital colorimeter was used to obtain Commission Internationale de l'Eclairage (CIELab) color parameters. The translucency parameter (TP) of the substrate and sample, as well as color difference (ΔE) and chroma (C) between the different groups were calculated. Additionally, the ΔE and TP were compared with the moderately unacceptable match of ΔE = 3.6. The statistical analysis was conducted using ANOVA and Tukey HSD post-hoc test (α = 0.05).
RESULTS
HT-Zr exhibited high translucency (TP = 11.02 ± 0.18), and the mean ΔE of the testing samples ranged between 2.18 ± 0.20 and 13.14 ± 0.31. The ZR-CG and MT-A2 groups showed the highest and lowest lightness separately. The CR-CG group exhibited the highest C, and the ΔE was lower than that of 3.6. The MT-TR group showed the lowest C and the highest ΔE. The inter-group comparison revealed that the ΔE for different cement is mostly lower than the acceptable color match of 1.0; moreover, the ΔE for all the substrates, excluding the CG group, is higher than 3.6.
CONCLUSIONS
The abutment substrate materials and the cement color should be considered with caution when using HT-Zr, with the effect of abutment substrate materials being more apparent in color accuracy. HT-Zr restorations are not recommended for discolored or bleached abutments but only for natural-colored abutments to achieve the optimal color appearance.
PubMed: 38076041
DOI: 10.1016/j.heliyon.2023.e23046 -
European Journal of Translational... Dec 2023In order to help dentists in choosing the right type of cement for implant-based prostheses, the radiopacity of commonly used cements available in the market was...
In order to help dentists in choosing the right type of cement for implant-based prostheses, the radiopacity of commonly used cements available in the market was investigated by digital radiography with PSP sensor. In the present study, temporary cements of TempBond (Kerr, Germany), TempBond clear (Kerr, Germany), Dycal (Dentsply, USA) and permanent cements of Multilink N (Ivoclar, Brazil), Panavia F 2.0 (Kurrary, Japan), Fuji plus (GC, Japan), RelyX (3M, USA), Durelon (3M, USA) were used. Four pill-like samples with 0.5 mm and 1 mm thickness and 5 mm in diameter inside the silicon index as recommended by the manufacturer were prepared for each cement. Aluminum step wedge (99% aluminum alloy) was used as control. Using digital radiography, cement and aluminum step wedge samples were radiographed. The images of cement tablets were measured by digital radiography using DFW software to check their radiopacity values. Bonferroni test and Mann-Whitney U test were used for comparison of cements. The highest radiopacity between the group of 1 and 0.5 mm thickness was related to Glass ionomer Fujiplus GC (2407±45.99) and TempBond (137.21±22.46) cement, respectively. Whereas, the lowest radiopacity among the groups was related to Clear cement. The difference between the mean radiopacities among the studied groups was statistically significant (p<0.001). Based on the results, among the available cements, Glass ionomer Fujiplus GC and TempBond cement are the most efficient for 1 and 0.5 mm thickness, respectively, and Clear cement is the least efficient cement in both groups in terms of radiopacity.
PubMed: 38050411
DOI: 10.4081/ejtm.2023.11940 -
Journal of Pharmacy & Bioallied Sciences Jul 2023The position of the canine has a key role in facial harmony, dental aesthetics, functional occlusion, and health of temperomandibular joint. Maxillary canine impaction...
INTRODUCTION
The position of the canine has a key role in facial harmony, dental aesthetics, functional occlusion, and health of temperomandibular joint. Maxillary canine impaction is the second most common tooth after third molars impaction. Maxillary canines are more prone to impaction due to longer path of eruption.
SETTINGS AND DESIGN
All the patients were examined in the Dental Chair light and referred to the department of Oral Radiology for Orthopantomogram. Yamamoto's classification was used to classify maxillary canine impaction. Position of mandibular canine from cement-enamel junction was used for mandibular canine impaction.
MATERIALS AND METHODS
The study was performed on 2300 patients who consulted the orthodontic department from January 2018 to July 2022. Orthopantomogram of each patient was examined for canine impaction, retained deciduous teeth, cyst, and other anomalies. The incidence and pattern of canine impaction was assessed.
STATISTICAL ANALYSIS
The data was then statistically analyzed using Graph Pad Prism software. The incidence of impacted canine was evaluated. The effect of gender was evaluated using a -test.
RESULTS
A total of 2300 subjects were examined out of which 52 individuals were diagnosed with canine impaction. The incidence of canine impaction among orthodontic patients is 2.26%. The amount of canine impaction in females (60%) is higher than males (40%). The ratio of canine impaction of the maxilla and mandible is 2.5.
CONCLUSION
The incidence of canine impaction was found to be 2.26 percent in the tribal dominant population of Jharkhand. Type II (50%) pattern in the maxilla and Level A (57%) impaction in the mandible was found to be the highest.
PubMed: 37693975
DOI: 10.4103/jpbs.jpbs_177_23 -
Journal of Pharmacy & Bioallied Sciences Jul 2023A regular and timely first dental visit plays a cardinal role in the future oral health of the child. It is used to begin preventive and corrective interventions in...
Evaluation of Age, Chief Complaint, Diagnosis, and Treatment Done during the First Dental Visit among Children in an Academic Dental Institution in Southern Kerala, India.
CONTEXT
A regular and timely first dental visit plays a cardinal role in the future oral health of the child. It is used to begin preventive and corrective interventions in dental care.
AIM
To evaluate the age, chief complaint, diagnosis, and treatment done during the first dental visit among children in an academic dental institution in southern Kerala, India.
MATERIALS AND METHODS
A descriptive cross sectional retrospective survey was conducted between January and June 2022 among children in an academic dental institution in southern Kerala, India. The hospital records at the Pushpagiri College of Dental Sciences were examined to obtain the child's age, chief complaint, diagnosis, and treatment done during the first dental visit among children. Statistical Analysis: The data were expressed in frequencies and percentages.
RESULTS
The records of 1000 children (680 male and 320 female) were examined. Most children (40%) who came for their first dental visit were aged between 4 and 6 years. Only 16% of children aged 0-3 years came for their first dental visit. Pain and sensitivity (50%) and tooth decay (17%) were the most common chief complaints among children. Dental caries (45%) and pulpal pathology (38%) were the most common diagnoses among children. The most common treatments done were glass ionomer cement restorations (32%), followed by prescribing medications (29%). No treatment was required for 16% of the children. Only a minority (3%) of the children received preventive treatments.
CONCLUSIONS
The first dental visit was delayed, and most children sought treatment only during apparent acute symptoms. There is a high prevalence of oral disease burden and underutilization of preventive dental care among children. Education of parents on the value of first dental visits and the usage of preventative dental care in children is crucial.
PubMed: 37654253
DOI: 10.4103/jpbs.jpbs_21_23 -
Journal of Prosthodontic Research Apr 2024Partial laminate veneers, defined as small ceramic restorations adhesively luted onto unprepared anterior teeth, are an interesting and conservative alternative to... (Review)
Review
STUDY SELECTION
Partial laminate veneers, defined as small ceramic restorations adhesively luted onto unprepared anterior teeth, are an interesting and conservative alternative to conventional ceramic and composite resin veneers in the anterior region. This literature review aimed to summarize the available laboratory and clinical data on ceramic partial laminate veneers. An electronic search of the MEDLINE/PubMed, EBSCO, and Web of Science databases was conducted. The keywords used were "partial veneer," "partial laminate veneer," "ceramic fragment," and "sectional veneer." The Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines were followed. The risk of bias in the included studies was assessed using the QUIN tool.
RESULTS
Of the 266 identified articles, only 16 met the inclusion criteria (ten clinical reports, five laboratory studies, and one retrospective clinical study). To date, no randomized controlled clinical trials have been conducted. Most laboratory studies displayed a low risk of bias, with partial laminate veneers rendering adequate strength and color stability. Clinical reports have shown large variability in material selection, luting, and finishing/polishing protocols.
CONCLUSIONS
Low-quality evidence is available for ceramic partial laminate veneers. Available data from laboratory studies suggest good mechanical and optical performances comparable to those of conventional ceramic and composite resin veneers. Further clinical studies with longer follow-up periods are warranted.
Topics: Dental Porcelain; Retrospective Studies; Dental Veneers; Ceramics; Composite Resins; Resin Cements
PubMed: 37648480
DOI: 10.2186/jpr.JPR_D_23_00090 -
European Review For Medical and... Oct 2023To evaluate the effects of various surface pretreatment methods, including H2SO4, Riboflavin, and Al2O3, as well as different luting cement types, namely Methyl... (Randomized Controlled Trial)
Randomized Controlled Trial
The impact of PEEK pretreatment using H2SO4, riboflavin, and aluminum trioxide on the extrusion bond strength to canal dentin luted with Polymethyl methacrylate and resin-based composite cement.
OBJECTIVE
To evaluate the effects of various surface pretreatment methods, including H2SO4, Riboflavin, and Al2O3, as well as different luting cement types, namely Methyl Methacrylate based Cement (MMBC) and composite-based cement (CBC), on the extrusion bond strength (EBS) of poly-ether-ether-ketone (PEEK) posts bonded to canal dentin.
MATERIALS AND METHODS
This study involved 120 single-rooted human premolar teeth that underwent endodontic treatment. Following root canal preparation, PEEK posts were fabricated from PEEK blanks using a CAD-CAM system, resulting in a total of 120 posts. The posts were randomly assigned to one of four groups based on their post-surface conditioning: Group A H2SO4, Group B RF, Group C Al2O3, and Group D (NC), each consisting of 30 posts. Within each group, there were two subgroups based on the type of luting cement used for bonding. Subgroups A1, B1, C1, and D1 (n=15 each) utilized CBC, while Subgroups A2, B2, C2, and D2 (n=15 each) used MMBC.The bond strength between the PEEK posts and root dentin was assessed using a universal testing machine, and the failure modes were examined under a stereomicroscope. Statistical analysis, including one-way analysis of variance (ANOVA) and Tukey's Post Hoc test with a significance level of p=0.05, was performed to analyze the data and evaluate the effects of surface treatment and luting cement type on the bond strength.
RESULTS
Group B2, which underwent RF conditioning followed by Super-Bond C&B cement application, exhibited the highest bond strength scores at the coronal section (9.57±0.67 MPa). On the other hand, Group D1, which had no conditioning (NC) and used Panavia® V5 cement, showed the lowest EBS at the apical third (2.39±0.72 MPa). The overall results indicate that the different conditioning regimens and luting cement types did not significantly influence the bond strength of PEEK posts to root dentin (p>0.05).
CONCLUSIONS
Riboflavin activated by photodynamic therapy (PDT) and H2SO4 can be effective surface conditioners for PEEK posts. These treatments have shown potential for enhancing the bond strength between PEEK and resin cement. Additionally, the study revealed that MMA-based cement outperformed composite-based cement in terms of bond integrity with PEEK posts.
Topics: Humans; Aluminum; Aluminum Oxide; Bone Cements; Composite Resins; Dentin; Ether; Ethers; Ethyl Ethers; Glass; Ketones; Materials Testing; Polymethyl Methacrylate; Riboflavin
PubMed: 37916329
DOI: 10.26355/eurrev_202310_34135 -
Journal of Functional Biomaterials Feb 2024The aim of this umbrella review was to evaluate the longevity of glass ionomer cement (GIC) as a restorative material for primary and permanent teeth. Research in the... (Review)
Review
The aim of this umbrella review was to evaluate the longevity of glass ionomer cement (GIC) as a restorative material for primary and permanent teeth. Research in the literature was conducted in three databases (MedLine/PubMed, Web of Science, and Scopus). The inclusion criteria were: (1) to be a systematic review of clinical trials that (2) evaluated the clinical longevity of GICs as a restorative material in primary and/or permanent teeth; the exclusion criteria were: (1) not being a systematic review of clinical trials; (2) not evaluating longevity/clinical performance of GICs as a restorative material; and (3) studies of dental restorative materials in teeth with enamel alterations, root caries, and non-carious cervical lesions. Twenty-four eligible articles were identified, and 13 were included. The follow-up periods ranged from 6 months to 6 years. Different types of GICs were evaluated in the included studies: resin-modified glass ionomer cement (RMGIC), compomers, and low- and high-viscosity glass ionomer cement. Some studies compared amalgam and composite resins to GICs regarding longevity/clinical performance. Analyzing the AMSTAR-2 results, none of the articles had positive criteria in all the evaluated requisites, and none of the articles had an a priori design. The criteria considered for the analysis of the risk of bias of the included studies were evaluated through the ROBIS tool, and the results of this analysis showed that seven studies had a low risk of bias; three studies had positive results in all criteria except for one criterion of unclear risk; and two studies showed a high risk of bias. GRADE tool was used to determine the quality of evidence; for the degree of recommendations, all studies were classified as Class II, meaning there was still conflicting evidence on the clinical performance/longevity of GICs and their recommendations compared to other materials. The level of evidence was classified as Level B, meaning that the data were obtained from less robust meta-analyses and single randomized clinical trials. To the best of our knowledge, this is the first umbrella review approaching GIC in permanent teeth. GICs are a good choice in both dentitions, but primary dentition presents more evidence, especially regarding the atraumatic restorative treatment (ART) technique. Within the limitation of this study, it is still questionable if GIC is a good restorative material in the medium/long term for permanent and primary dentition. Many of the included studies presented a high risk of bias and low quality. The techniques, type of GIC, type of cavity, and operator experience highly influence clinical performance. Thus, clinical decision-making should be based on the dental practitioner's ability, each case analysis, and the patient's wishes. More evidence is needed to determine which is the best material for definitive restorations in permanent and primary dentition.
PubMed: 38391901
DOI: 10.3390/jfb15020048 -
Cureus Sep 2023This systematic review and meta-analysis aimed to evaluate the effect of different surface treatments on the shear bond strength (SBS) values between zirconia and resin... (Review)
Review
This systematic review and meta-analysis aimed to evaluate the effect of different surface treatments on the shear bond strength (SBS) values between zirconia and resin cement compared to untreated specimens. The effects of various surface treatments on the bond strength between zirconia and resin cement were investigated by searching relevant articles on PubMed, ScienceDirect, and Google Scholar databases. A total of 13 studies that met the inclusion and exclusion criteria and addressed the research question were selected for statistical analysis. The studies were evaluated for heterogeneity, and a meta-analysis was performed. In total, 13 in vitro studies were included in accordance with the eligibility criteria. All 13 studies consistently demonstrated that silica coating yielded the highest SBS, followed by sandblasting and laser treatments. The meta-analysis using a random-effect model indicated a significant intergroup comparison, except for a few studies. Among the three treatments examined, the silica coating of zirconia was identified as the most effective in enhancing the bond strength between zirconia and resin cement. Further controlled laboratory and clinical studies are necessary to validate these findings and explore additional factors that may influence the effects of these surface treatments.
PubMed: 37829958
DOI: 10.7759/cureus.45045 -
Cureus Oct 2023Background This research set out to collate and contrast three popular luting agents-heated composite resin, resin-modified glass ionomer cement (RMGIC), and resin...
UNLABELLED
Background This research set out to collate and contrast three popular luting agents-heated composite resin, resin-modified glass ionomer cement (RMGIC), and resin cement, and light-cure resin cement by measuring their shear bond strengths. Shear bond strength was measured between lithium disilicate discs (IPS E-max) and specimens luted with heated composite resin (Tetric N-Ceram, Ivoclar Vivadent), self-adhesive resin cement (3M ESPE Rely X U200), light-activated resin cement (Rely X Veneer cement), and resin-modified glass ionomer cement (Fuji Plus, GC America). A comparison was made between the shear bond strength of standard luting cement and heated composite resin on lithium disilicate discs.
MATERIALS AND METHODS
Forty-eight lithium disilicate disc samples are collected and put on acrylic blocks for this investigation. To improve luting cement adhesion, the discs are etched with 5% hydrofluoric acid (HF) gel. For easier handling and lower viscosity during luting, the composite resin is heated to between 55 and 68°C on a digital wax melter. Shear bond strength tests were executed with the universal testing device after the following luting cement was applied in the center of the test specimen (lithium disilicate discs). Statistics software was used for the calculations and analysis.
RESULTS
In accordance with the findings of the tests, shear bond strengths ranged from 2.2851 ± 0.5901 for nanohybrid composite resin to 7.3740 ± 0.6969 for self-adhesive resin cement and 4.4647 ± 0.9774 for light-activated resin cement. A statistically significant (p≤0.001) difference between the groups was found. Mean shear bond strength was significantly highest in the self-adhesive resin cement group, followed by the light-activated resin cement group, resin-modified GIC, and least with the nanohybrid composite resin group.
CONCLUSION
Composite resins; in fixation of indirect restorations can have their viscosity reduced by preheating in a device, but they must be employed as soon as possible after removal. Standardizing the methods of heating composite resins for cementation is necessary to achieve desirable outcomes and direct the physician in their application. Although preheating composite resins for luting operations can be utilized to decrease the material's viscosity and enhance the restoration setting; it may not increase bond strength.
PubMed: 38022161
DOI: 10.7759/cureus.47110 -
International Dental Journal Aug 2023The aim of this research was to assess the effect of incorporating zein-coated magnesium oxide (zMgO) nanofillers to resin-based composite on the internal adaptation of...
OBJECTIVE
The aim of this research was to assess the effect of incorporating zein-coated magnesium oxide (zMgO) nanofillers to resin-based composite on the internal adaptation of the restorations using cross-polarisation optical coherence tomography (CP-OCT).
METHODS
Thirty noncarious human molar teeth were used. Class V cavities (3 × 5 mm) were prepared on the buccal and lingual surfaces of each tooth. Clearfil SE Bond 2 was applied to all the cavities and then the teeth were divided into 3 groups (n = 10) as follows: group 1-restored with N-Flow composite; group 2 and group 3-restored with N-Flow composite mixed with different zMgO nanoparticle concentrations (0.3% and 0.5% by weight, respectively) and then light cured using an LED curing device. Specimens were examined for interfacial adaptation examination under CP-OCT. Characterisation of the dental composite incorporating zMgO was done by Fourier-transform infrared spectroscopy (FTIR), x-ray diffraction (XRD), and field emission scanning electron microscopy (FESEM). Results were analysed with Kruskall-Wallis test followed by Mann-Whitney U test, at a significance level of P < .05.
RESULTS
XRD spectra exhibited the sharp peaks of zMgO in the composite enhanced with zMgO nanoparticles. FESEM analysis showed a uniform distribution of the zMgO nanoparticles in the composite and FTIR illustrated no change in the spectra. The gap percentage along the cavity floor was significantly lower in groups 2 and 3 in comparison to group 1 (P < .05). Also there was a significant difference in gap percentages between groups 2 and 3 (P < .05), with group 3 showing the lowest gap percentage.
CONCLUSIONS
The incorporation of 0.3% and 0.5% zMgO nanoparticles in flowable composite assists in improving the internal adaptation of the composite to the tooth surface.
Topics: Humans; Dental Restoration, Permanent; Dental Cavity Preparation; Composite Resins; Dental Materials; Resin Cements; Molar; Anti-Infective Agents; Dental Marginal Adaptation; Dental Leakage; Materials Testing
PubMed: 36549967
DOI: 10.1016/j.identj.2022.11.004