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Journal of Clinical and Experimental... Sep 2022Evaluation of the different causes listed in literature for the rate of success of Zirconia based restorations. (Review)
Review
BACKGROUND
Evaluation of the different causes listed in literature for the rate of success of Zirconia based restorations.
MATERIAL AND METHODS
With the help of PRISMA guidelines , this Systematic review was carried out. For a time span of 18 years that is from 2003 to 2020, articles were searched using three electronic data bases which are PubMed , Cochrane Library and Sciencedirect. The selected 27 articles which included the in vivo as well as the in vitro studies presented the performance of zirconia-based prosthetic restorations. The studies also stated the commonest reason for failure which ultimately depicted the rate of success of the fixed dental prosthesis. Due to heterogeneity of gathered information , meta analysis could not be carried out.
RESULTS
Failure of bond between veneer material and zirconia sub-structure could be related to the cause of fracture of veneering porcelain hypothetically.
CONCLUSIONS
Mechanical connection and building up of compressive strength due to thermal contraction at the time of cooling after sintering process is the reason for the bond developed amongst the two materials. Zirconia based restorations, zirconia failure cause.
PubMed: 36158774
DOI: 10.4317/jced.59711 -
Journal of Applied Biomaterials &... 2024Despite the development of implant-supported prostheses, there are still patients for whom conservative treatments such as resin-bonded fixed dental prostheses (RBFDPs)... (Review)
Review
Despite the development of implant-supported prostheses, there are still patients for whom conservative treatments such as resin-bonded fixed dental prostheses (RBFDPs) are more appropriate. This study's objective was to analyze the available research on full-ceramic RBFDPs. In this study, Web of Science, MEDLINE/PubMed, Scopus, Embase, Cochrane Library, and Google Scholar databases were searched for articles published in English between 2010 and 2020. A total of 14 studies were reviewed based on the eligibility criteria. The results showed that using a cantilever design with one abutment had an advantage over two abutments. Additionally, it was proposed that preparations designed with retentive aids, such as a proximal box, groove, and pinhole, could improve RBFDP survival rates. IPS e.max ZirCAD, In-Ceram alumina, and zirconia CAD/CAM were the most commonly used framework materials. Most studies used air abrasion, salinization, or hydrofluoric acid for surface treatment. Adhesive resin cements were the most frequently used type of cement. The survival rate of In-Ceram ceramics (85.3%-94.8%) was lower than that of In-Ceram zirconia and IPS e.max ZirCAD. Debonding, followed by framework fracture, was the leading cause of failure. Following 3-10 years follow-up, the survival percentage of all-ceramic RBFDPs ranged from 76% to 100%. Although RBFDPs have demonstrated satisfactory success as a conservative treatment, long-term follow-ups and higher sample sizes in clinical research are required to gain more reliable outcomes on the clinical success rate of various RBFDP designs.
Topics: Humans; Ceramics; Resin Cements; Dental Porcelain; Dental Prosthesis, Implant-Supported; Denture, Partial, Fixed, Resin-Bonded; Zirconium
PubMed: 38706266
DOI: 10.1177/22808000241250118 -
The Journal of Prosthetic Dentistry Jan 2021A consensus on whether to use an adhesive layer on glass-ceramics after etching with hydrofluoric acid and applying a silane-coupling agent is lacking. (Meta-Analysis)
Meta-Analysis
Does the application of an adhesive layer improve the bond strength of etched and silanized glass-ceramics to resin-based materials? A systematic review and meta-analysis.
STATEMENT OF PROBLEM
A consensus on whether to use an adhesive layer on glass-ceramics after etching with hydrofluoric acid and applying a silane-coupling agent is lacking.
PURPOSE
The purpose of this systematic review and meta-analysis was to determine whether adhesive layer application after etching and silanization influences the bond strength values of glass-ceramics to resin-based materials.
MATERIAL AND METHODS
PubMed, ISI Web of Science, and Scopus electronic databases were searched to select in vitro studies comparing bond strength values of etched and silanized glass-ceramics bonded with or without an adhesive layer. No publication year or language restriction was applied. Data sets were extracted, and the mean differences were applied by using the Rev Man 5.3 program. The association between bond strength (shear/microshear or tensile/microtensile) and an adhesive layer application on nonaged and aged specimens was analyzed.
RESULTS
Of 4727 potentially eligible studies, 54 were selected for full-text analysis, and 15 were included for qualitative synthesis; of these, 14 were used in the meta-analysis. A total of 2 meta-analyses were performed with heterogeneity varying from high to moderate among study specimens. For shear/microshear studies, both nonaged (MD, 1.36 [95% CI: -0.18, 2.90], P=.080, I=79%) and aged (MD, 0.89 [95% CI: -1.04, 2.82], P=.370, I=80%) specimens presented no statistically significant difference between groups bonded with or without an adhesive layer application. For microtensile studies, both nonaged (MD, -1.49 [95% CI: -2.48, -0.50], P=.003, I=88%) and aged (MD, -3.87 [95% CI: -5.63, -2.11], P<.001, I=97%) specimens exhibited higher values without an adhesive application.
CONCLUSIONS
Regardless of the bond strength test used, an adhesive layer application did not improve the bond strength of etched and silanized glass-ceramics to resin-based materials. The influence of this adhesive layer application should be evaluated under clinical conditions.
Topics: Ceramics; Dental Bonding; Dental Cements; Dental Porcelain; Humans; Materials Testing; Resin Cements; Silanes; Surface Properties; Tensile Strength
PubMed: 32087843
DOI: 10.1016/j.prosdent.2019.12.005 -
The Journal of Prosthetic Dentistry Oct 2021Reasons for failures of bilayer yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) restorations include the core-veneer interface bond strength. The influence of... (Meta-Analysis)
Meta-Analysis Review
STATEMENT OF PROBLEM
Reasons for failures of bilayer yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) restorations include the core-veneer interface bond strength. The influence of the veneering method on the bond strength of veneered Y-TZP is unclear.
PURPOSE
The purpose of this systematic review and meta-analysis was to evaluate the effect of the veneering method on the bond strength of bilayer Y-TZP.
MATERIAL AND METHODS
This review followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement. Searches were performed on PubMed/MEDLINE, Web of Science (Core Collection), and Scopus for in vitro studies evaluating the effect of the veneering technique on the bond strength of bilayer Y-TZP. Statistical analyses were performed with random-effect models (α=.05).
RESULTS
From 619 identified studies, 140 were selected for full-text analysis and 16 were included. Manual searching yielded no additional articles. The meta-analyses comprised 15 studies, and 1 study was included only in the descriptive analysis. Meta-analyses compared the hand-layered method (control) with pressed, fused, and cemented veneering methods. The fused and cemented techniques were analyzed by using subgroups assessing the veneering ceramic type (predominantly glass-ceramics and particle-filled glass-ceramics). Similar bond strength results (P=.540) were found for pressed and hand-layered veneered Y-TZP specimens. Fused veneers achieved higher bond strength values (P<.001) than the hand-layered veneers on Y-TZP frameworks, irrespective of the veneering ceramic type (predominantly glass-ceramics: P=.002; particle-filled glass-ceramics: P<.001). Global and subgroup analyses indicated that lower core-veneer bond strength values (P<.001) were found for cemented in relation to hand-layered veneers.
CONCLUSIONS
Core-veneer interfacial adhesion was equivalent for pressed and hand-layered veneering techniques. Improved bond strength, regardless of the veneer ceramic material type, was achieved by the fused veneering method, which seems to be a promising choice for the veneering of Y-TZP. In contrast, the cemented method may be unsuitable for veneering Y-TZP structures because of its lower bond strength than the hand-layered veneering technique.
Topics: Dental Porcelain; Dental Veneers; Materials Testing; Yttrium; Zirconium
PubMed: 32893018
DOI: 10.1016/j.prosdent.2020.06.008 -
BioMed Research International 2022Despite the importance of identifying proper novel porcelain preparation techniques to improve bonding of orthodontic brackets to porcelain surfaces, and despite the... (Meta-Analysis)
Meta-Analysis
BACKGROUND
Despite the importance of identifying proper novel porcelain preparation techniques to improve bonding of orthodontic brackets to porcelain surfaces, and despite the highly controversial results on this subject, no systematic review or meta-analysis exists in this regard.
OBJECTIVE
To comparatively summarize the effects of all the available porcelain surface treatments on the shear bond strength (SBS) and adhesive remnant index (ARI) of orthodontic brackets (metal, ceramic, polycarbonate) bonded to feldspathic porcelain restorations. . A search was conducted for articles published between January 1990 and February 2021 in PubMed, MeSH, Scopus, Web of Science, Cochrane, Google Scholar, and reference lists. . English-language articles comparing SBS of feldspathic porcelain's surface preparation methods for metal/ceramic/polycarbonate orthodontic brackets were included. Articles comparing silanes/bonding agents/primers without assessing roughening techniques were excluded. . Studies were summarized and risk of bias assessed. Each treatment's SBS was compared with the 6 and 10 MPa recommended thresholds. Studies including comparator (HF [hydrofluoric acid] + silane + bonding) were candidates for meta-analysis. ARI scores were dichotomized. Fixed- and random-effects models were used and forest plots drawn. Egger regressions and/or funnel plots were used to assess publication biases.
RESULTS
Thirty-two studies were included (140 groups of SBS, 82 groups of ARI). Bond strengths of 21 studies were meta-analyzed (64 comparisons in 14 meta-analyses). ARIs of 12 articles were meta-analyzed (28 comparisons in 8 meta-analyses). Certain protocols provided bond strengths poorer than HF + silane + bonding: "abrasion + bonding, diamond bur + bonding, HF + bonding, Nd:YAG laser (1 W) + silane + bonding, CO laser (2 W/2 Hz) + silane + bonding, and phosphoric acid + silane + bonding." Abrasion + HF + silane + bonding might act almost better than HF + silane + bonding. Abrasion + silane + bonding yields controversial results, being slightly (marginally significantly) better than HF + silane + bonding. Some protocols had controversial results with their overall effects being close to HF + silane + bonding: "Cojet + silane + bonding, diamond bur + silane + bonding, Er:YAG laser (1.6 W/20 Hz) + silane + bonding." Few methods provided bond strengths similar to HF + silane + bonding without much controversy: "Nd:YAG laser (2 W) + silane + bonding" and "phosphoric acid + silane + bonding" (in ceramic brackets). ARIs were either similar to HF + silane + bonding or relatively skewed towards the "no resin on porcelain" end. The risk of bias was rather low. . All the found studies were in vitro and thus not easily translatable to clinical conditions. Many metasamples were small.
CONCLUSIONS
The preparation methods HF + silane + bonding, abrasion + HF + silane + bonding, Nd:YAG (2 W) + silane + bonding, and phosphoric acid + silane + bonding (in ceramic brackets) might provide stronger bonds.
Topics: Dental Porcelain; Humans; Materials Testing; Orthodontic Brackets; Shear Strength; Surface Properties
PubMed: 35036438
DOI: 10.1155/2022/8246980 -
The Journal of Adhesive Dentistry Apr 2022This systematic review aims to explore and compile the effect of adhesive luting on the mechanical properties of dental ceramics used as restorative materials. (Meta-Analysis)
Meta-Analysis
PURPOSE
This systematic review aims to explore and compile the effect of adhesive luting on the mechanical properties of dental ceramics used as restorative materials.
MATERIALS AND METHODS
The PubMed/MEDLINE, Web of Science and Scopus databases were searched on January 31st, 2021 to select laboratory studies written in English, without publishing-date restrictions, which compared the mechanical properties of commercially available dental ceramics as restorative materials luted using adhesive vs non-adhesive strategies. A total of 20 (out of 2039) studies were eligible and included in the analysis. Two authors independently selected the studies, extracted the data and assessed the risk of bias. Mean differences (RevMan5.1, random effects model, α = 0.05) were obtained by comparing resistance values of adhesive and non-adhesive conditions (global analysis). Subgroup analyses were performed considering ceramic composition and aging.
RESULTS
In the global analysis, adhesive luting induced higher mechanical resistance values compared to non-adhesive luting (p ≤ 0.01). The same effect was observed for glass and alumina ceramics (p ≤ 0.01), but not for zirconia polycrystals (p = 0.83). Adhesive luting was favorable in both the aged and non-aged subgroup analysis (p ≤ 0.01). High heterogeneity was found in all meta-analyses. All analyzed studies in the systematic review scored negatively for risk of bias in most of the factors considered.
CONCLUSIONS
Adhesive luting reinforces the mechanical properties of dental ceramics used as restorative materials, with the exception of zirconia polycrystals.
Topics: Ceramics; Dental Bonding; Dental Cements; Dental Materials; Dental Porcelain; Materials Testing; Resin Cements; Surface Properties
PubMed: 35416449
DOI: 10.3290/j.jad.b2916469 -
Cureus Oct 2022The prosthesis must have good survival despite being functional for at least 5-10 years. This makes sure that the replacement of missing teeth does not become a repeated... (Review)
Review
The prosthesis must have good survival despite being functional for at least 5-10 years. This makes sure that the replacement of missing teeth does not become a repeated expense. Of 579 identified articles, 15 met the inclusion criteria for systematic review. Missing teeth replacement materials are divided into two groups: porcelain fused to metal and all ceramics. Data related to survival rates as well as the most common mode of failure is observed from both groups. It was observed that porcelain fused to metal prostheses had an approximately 99.5% survival rate and an approximately 92% survival rate for all-ceramic tooth-supported prostheses after five years of insertion. Porcelain-fused-to-metal (PFM) prostheses had a better survival rate after five years of insertion as compared to all-ceramic prostheses. Porcelain fused to metal should be the treatment of choice for dentists and patients when missing teeth need to be fixed.
PubMed: 36407172
DOI: 10.7759/cureus.30338 -
Clinical Oral Investigations May 2022To evaluate clinical performance of the new CAD/CAM resin-matrix ceramics and compare it with ceramic partial coverage restorations. (Review)
Review
OBJECTIVE
To evaluate clinical performance of the new CAD/CAM resin-matrix ceramics and compare it with ceramic partial coverage restorations.
MATERIALS AND METHODS
An electronic search of 3 databases (The National Library of Medicine (MEDLINE/PubMed), Scopus, and the Cochrane Central Register of Controlled Trials) was conducted. English clinical studies published between 2005 and September 2020 that evaluated the clinical performance of CAD/CAM resin-matrix ceramics inlays, onlays, or overlays were selected. The primary clinical question was applied according to PICOS strategy (Population, Intervention, Comparison, Outcome, Study design). The included studies were individually evaluated for risk of bias according to the modified Cochrane Collaboration tool criteria.
RESULTS
A total of 7 studies were included according to the established inclusion and exclusion criteria. From the included studies, 6 were randomized clinical trials while one study was longitudinal observational study without control group. According to the results of the included studies, the success rate of CAD/CAM resin-based composite ranged from 85.7 to 100% whereas the success rate reported for ceramic partial coverage restorations ranged from 93.3 to 100%. Fractures and debondings are found to be the most common cause of restorations failure.
CONCLUSION
CAD/CAM resin-based composite can be considered a reliable material for partial coverage restorations with clinical performance similar to glass ceramic restorations. However, this result needs to be confirmed in long-term evaluations.
CLINICAL RELEVANCE
CAD/CAM resin-based composites provide a potential alternative to ceramic indirect restorations. However, clinicians must be aware of the lake of knowledge regarding long-term outcome.
Topics: Ceramics; Composite Resins; Computer-Aided Design; Dental Materials; Dental Porcelain; Inlays; Longitudinal Studies; Observational Studies as Topic
PubMed: 35320383
DOI: 10.1007/s00784-022-04449-2 -
Journal of Personalized Medicine Feb 2024No systematic review or meta-analysis has been identified that provides a clinician's perspective on the shade selection process for ceramic restorations. The aim of the... (Review)
Review
BACKGROUND
No systematic review or meta-analysis has been identified that provides a clinician's perspective on the shade selection process for ceramic restorations. The aim of the present systematic review is to find and systematize the available knowledge by referring to the methods to assess the color of dental ceramics.
METHODS
The final search was performed on 10 December 2023 in six search engines. The keywords used in the search strategy were as follows: ("color matching" OR "shade matching" OR "color measurement" AND "porcelain" OR "dental ceramics") AND "dentistry" AND "accuracy".
RESULTS
The search strategy identified 139 potential articles. After the screening process, sixteen articles were included in the review.
CONCLUSIONS
In conclusion, the most common method, the visual method, has lower accuracy and repeatability. Devices like spectrophotometers and colorimeters provide precise, repeatable, and objective measurements, but fail to be widely applied in everyday clinical practice. Clinicians should not rely solely on their senses for shade determination, but should turn to quantitative methods. Colorimetric devices connected to mobile applications are an interesting and useful tool. Software and apps based on artificial intelligence are emerging as promising tools, but they require further research.
PubMed: 38540994
DOI: 10.3390/jpm14030252 -
International Journal of Oral... Sep 2023This systematic review aimed to evaluate the medium-term (3-year) overall survival and success rates, marginal bone loss and different biological parameters displayed...
PURPOSE
This systematic review aimed to evaluate the medium-term (3-year) overall survival and success rates, marginal bone loss and different biological parameters displayed with one-piece zirconia implants.
MATERIALS AND METHODS
Electronic searches were conducted of the MEDLINE (via PubMed), Scopus (Elsevier), Cochrane Library (Wiley) and Web of Science (Clarivate Analytics) databases and manual searching was also performed for relevant articles published up to 14 November 2022. The review included human studies with a minimum of 10 subjects and/or 20 implants and with a follow-up period of at least 3 years after implant placement.
RESULTS
Twelve studies met the inclusion criteria and were included for analysis, giving a total of 1,621 one-piece zirconia implants. Eleven studies were included to perform a meta-analysis of survival rates, and six for success rates and marginal bone loss. The survival and success rates at the 3-year follow-up were 94.4% (95% confidence interval 90.4%-98.4%; P < 0.001) and 91.6% (95% confidence interval 84.2%-98.9%; P < 0.001), respectively, and marginal bone loss was 0.231 mm (95% confidence interval 0.190-0.272; P < 0.001).
CONCLUSIONS
One-piece zirconia implants appear to be a reliable option for restoring missing teeth, obtaining an implant survival rate of 94.4% and a success rate of 91.6% after a follow-up period of at least 3 years. Moreover, the results showed acceptable rates of marginal bone loss and adequate biological parameters.
PubMed: 37767614
DOI: No ID Found