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Australian Endodontic Journal : the... Aug 2021This systematic review was registered in PROSPERO (CRD42017075917) and aimed to investigate whether the available clinical evidence supports the hypothesis that... (Review)
Review
This systematic review was registered in PROSPERO (CRD42017075917) and aimed to investigate whether the available clinical evidence supports the hypothesis that reciprocating motion results in a lower incidence of nickel-titanium files fracture compared to continuous rotation. Clinical studies that reported the incidence of fracture of engine-driven nickel-titanium files were included. The main exposure was the kinematics, and the primary outcome was the incidence of files fracture. The overall incidence of files fracture was 2.27%, with a trend for higher incidence with rotary motion (2.43%) than with reciprocating (1.0%), though without significant differences. Multiple meta-regression models revealed that the use of nickel-titanium files in more than four teeth and less proficient operators were associated with a higher incidence of file fracture. There was no difference in the clinical incidence of fracture of nickel-titanium instruments between reciprocating and rotary motions; however, other factors were identified.
Topics: Dental Alloys; Equipment Design; Incidence; Nickel; Root Canal Preparation; Rotation; Titanium
PubMed: 33410578
DOI: 10.1111/aej.12484 -
Journal of the Mechanical Behavior of... Sep 2023The purpose of this systematic review and meta-analysis was to compare the results of tribocorrosion in titanium alloys of dental implants submitted to surface treatment... (Meta-Analysis)
Meta-Analysis Review
The purpose of this systematic review and meta-analysis was to compare the results of tribocorrosion in titanium alloys of dental implants submitted to surface treatment with those whose treatment was not performed. An electronic search was carried out on the MEDLINE (PubMed), Web of Science, Virtual Health Library and Scopus databases. The search strategy used was PECO: Participants (P): titanium alloys; Exposure (E): surface treatment; Comparison (C): absence of surface treatment; and Result/Outcome (O): tribocorrosion. The search found a total of 336 articles, where 27 was selected by title or abstract, resulted to 10 after reading in full. The treatments that formed the rutile layer had better tribological results and therefore better protected the material from mechanical and chemical degradation, contrary to the technique with the addition of nanotubes. It was concluded that the surface treatment proves to be efficient to protect metals from mechanical and chemical wear.
Topics: Humans; Alloys; Titanium; Corrosion; Dental Implants; Surface Properties
PubMed: 37423010
DOI: 10.1016/j.jmbbm.2023.106008 -
The European Journal of Prosthodontics... Sep 2014The purpose of this study is to review the available literature related to composite inlays. Electronic databases published up to November 2013 were searched. Studies... (Comparative Study)
Comparative Study Review
The purpose of this study is to review the available literature related to composite inlays. Electronic databases published up to November 2013 were searched. Studies that evaluate composite resin inlays for the restoration of posterior teeth were selected. The studies should compare composite inlays against gold inlays, ceramic inlays and direct composite fillings regarding longevity, aesthetic quality and postoperative sensitivity or comparing the clinical effectiveness of them on premolars versus molars or on 1-2 surface preparations versus multi-surface preparations. Despite the heterogeneity of the available clinical trials composite inlays seem to be an effective method for the restoration of posterior teeth.
Topics: Ceramics; Composite Resins; Dental Materials; Dental Restoration, Permanent; Esthetics, Dental; Gold Alloys; Humans; Inlays
PubMed: 25831713
DOI: No ID Found -
Frontiers in Bioscience (Landmark... Dec 2021The fracture of endodontic instruments inside the canal represents a problem that is not always easy to solve. The reutilization of endodontic instruments after... (Meta-Analysis)
Meta-Analysis Review
The fracture of endodontic instruments inside the canal represents a problem that is not always easy to solve. The reutilization of endodontic instruments after sterilization procedures raises the question of how these processes affect their physical and mechanical properties. Alterations can involve the surface of the instruments, as well as their cutting effectiveness, shape and resistance to torsional and cyclic fatigue. The methodology adopted for this systematic review followed the PRISMA guidelines for systematic reviews. The following search terms were used in PubMed and Scopus: "endodontic sterilization", "endodontic autoclave", "cyclic fatigue", "torsional", "cutting efficiency", "sterilization", "surface characteristics" and "corrosion". After the screening phase, the application of exclusion criteria and the removal of duplicates, 51 studies were identified and divided into four outcomes: cyclic fatigue; deformation and torsional fatigue; corrosion or surface alterations; and cutting efficiency. Our study of the scientific literature highlights disagreements between studies on these effects. After autoclaving, instruments exhibit a reduction in the cutting efficiency, but NiTi alloy instruments have an improved resistance to cyclic and torsional fatigue.
Topics: Equipment Failure; Materials Testing; Network Meta-Analysis; Root Canal Preparation; Sterilization; Stress, Mechanical
PubMed: 34994183
DOI: 10.52586/5062 -
The Journal of Prosthetic Dentistry Oct 2022Infections associated with bacterial biofilm formation are an important cause of early implant failure. With the growing number of antibiotic-resistant bacteria, the... (Review)
Review
STATEMENT OF PROBLEM
Infections associated with bacterial biofilm formation are an important cause of early implant failure. With the growing number of antibiotic-resistant bacteria, the incorporation of zinc into TiO coatings of titanium implants has emerged to promote osseointegration and inhibit bacterial proliferation. However, a systematic assessment of its efficacy is lacking.
PURPOSE
The purpose of this systematic review and meta-analysis was to assess the bactericidal effect of zinc-modified TiO coatings on titanium or Ti-6Al-4V alloy.
MATERIAL AND METHODS
The review was structured based on the preferred reporting items for systematic reviews and meta-analyses (PRISMA) checklist and the peer review of electronic search strategies (PRESS) guidelines. The search was performed in Science Direct, SCOPUS, Web of Science, and PubMed databases, including experimental in vitro studies that used titanium or Ti-6Al-4V as a control group and performed bacterial assays. Meta-analysis was performed by using the standardized mean differences of antibacterial effects.
RESULTS
A total of 2519 articles were collected after duplicate removal. Then, eligibility criteria and a manual search were applied to select 20 studies for qualitative analysis and 16 studies for statistical analysis. The risk of bias revealed low-quality evidence. The meta-analysis showed that zinc positively affected the bactericidal activity of TiO coatings (-8.79, CI=-11.01 to -6.57, P<.001), with a high degree of heterogeneity (I=78%). Subgroup analysis with TiO nanotubes produced by anodization and ZnO nanoparticles by hydrothermal synthesis reduced heterogeneity to 43%, with the removal of outliers (I=46%), with a favorable antibacterial effect for zinc incorporation into TiO.
CONCLUSIONS
Bactericidal activity was identified for zinc incorporated into TiO coatings, making it an interesting option for titanium dental implants.
PubMed: 36270807
DOI: 10.1016/j.prosdent.2022.05.007 -
British Dental Journal Jun 2017Objective The objective of this systematic review is to evaluate the survival rate of resin bonded bridges (RBBs) and understand the relationship between various... (Review)
Review
Objective The objective of this systematic review is to evaluate the survival rate of resin bonded bridges (RBBs) and understand the relationship between various prognostic factors and survival rate.Methods An electronic medline and hand search were carried out to identify prospective studies on RBBs. Critical appraisal of the studies was done and data was extracted from selected studies. Survival rate was estimated with random effect Poissons regression using R software. Influence of location and luting cements was estimated using odds ratio and forest plots using CMA software.Results The predicted survival rate for 5 and 10 years are 83.6% and 64.9%, respectively. Functional survival after rebonding has not been considered in this study. It is expected that functional survival will be higher than event free survival. Debonding of the restoration (78%) is the most common type of failure followed by porcelain fracture (13%). Bridges cemented with Panavia showed the highest survival rate (67%) among the luting cements analysed for 5 years. Retentive tooth preparation, preparation confined to enamel, silicoating, supra gingival margins, Ni-Cr or Co-Cr alloys and no occlusion on pontic in lateral excursions have been reported to be associated with better survival rates. Anterior RBBs were found to be more retentive than posterior RBBs. Pooled odds for retention of RBB in anterior segment when compared to posterior is 1.915 (95%CI - 0.847-4.329). RBBs placed in maxilla were found to be more retentive than bridges placed in mandible. Pooled odds for retention of RBB in maxilla when compared to mandible is 1.774 (95%CI - 0.803-3.917).Conclusion and recommendations Replacement of missing teeth with resin-bonded fixed partial dentures is a conservative alternative to conventional fixed partial dentures and should be included as a treatment option wherever possible. There are numerous factors that influence the longevity of RBBs. To achieve successful long-term survival, careful case selection and consideration of various variables is crucial. There is a clear and urgent need for well controlled studies to better understand the effects of these prognostic factors.
Topics: Composite Resins; Dental Bonding; Dental Restoration Failure; Denture Design; Denture Retention; Denture, Partial, Fixed, Resin-Bonded; Humans; Prognosis
PubMed: 28703151
DOI: 10.1038/sj.bdj.2017.497 -
PeerJ 2022Titanium dioxide dental implants have a controversial effect on reactive oxygen species (ROS) production. ROS is necessary for cellular signal transmission and proper... (Meta-Analysis)
Meta-Analysis
BACKGROUND
Titanium dioxide dental implants have a controversial effect on reactive oxygen species (ROS) production. ROS is necessary for cellular signal transmission and proper metabolism, but also has the ability to cause cell death as well as DNA, RNA, and proteins damage by excessive oxidative stress. This study aimed to systematically review the effect of titanium dioxide dental implant-induced oxidative stress and its role on the osteogenesis-angiogenesis coupling in bone remodeling.
METHODS
This systematic review was performed conforming to preferred reporting items for systematic review and meta-analysis (PRISMA) model. Four different databases (PubMed, Science Direct, Scopus and Medline databases) as well as manual searching were adopted. Relevant studies from January 2000 till September 2021 were retrieved. Critical Appraisal Skills Programme (CASP) was used to assess the quality of the selected studies.
RESULTS
Out of 755 articles, only 14 which met the eligibility criteria were included. Six studies found that titanium dioxide nanotube (TNT) reduced oxidative stress and promoted osteoblastic activity through its effect on Wnt, mitogen-activated protein kinase (MAPK) and forkhead box protein O1 (FoxO1) signaling pathways. On the other hand, three studies confirmed that titanium dioxide nanoparticles (TiONPs) induce oxidative stress, reduce ostegenesis and impair antioxidant defense system as a significant negative correlation was found between decreased SIR3 protein level and increased superoxide (O ). Moreover, five studies proved that titanium implant alloy enhances the generation of ROS and induces cytotoxicity of osteoblast cells via its effect on NOX pathway.
CONCLUSION
TiONPs stimulate a wide array of oxidative stress related pathways. Scientific evidence are in favor to support the use of TiO nanotube-coated titanium implants to reduce oxidative stress and promote osteogenesis in bone remodeling. To validate the cellular and molecular cross talk in bone remodeling of the present review, well-controlled clinical trials with a large sample size are required.
Topics: Reactive Oxygen Species; Titanium; Dental Implants; Oxidative Stress; Bone Remodeling
PubMed: 35261818
DOI: 10.7717/peerj.12951 -
Heliyon Dec 2022Critically analyzed the existing literature to answer the question "What is the influence of roughness of surfaces for dental implants obtained by additive manufacturing...
OBJECTIVE
Critically analyzed the existing literature to answer the question "What is the influence of roughness of surfaces for dental implants obtained by additive manufacturing compared to machined on osteoblastic cell adhesion and proliferation?"
DESIGN
This systematic review followed the guidelines of the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) and was registered in the Open Science Framework. The personalized search strategy was applied to Embase, Pub Med, Scopus, and Science Direct databases and Google Scholar and ProQuest grey literature. The selection process was carried out in two stages independently by two reviewers according to the eligibility criteria. The risk of bias was analyzed using a checklist of important parameters to be considered.
RESULTS
When applying the search strategy on databases 223 articles were found, after removing the duplicates, 171 were analyzed by title and abstract of which 25 were selected for full reading, of these, 6 met the eligibility criteria. 2 studies were included from the reference list totaling 8 articles included in this systematic review and none were included from the Grey Literature. 7 had a low risk of bias and 1 moderate.
CONCLUSIONS
1) Roughness is a property that must be analyzed and correlated with the chemical composition, intrinsic to the alloy and resulting from the surface treatment; morphology of topographic peaks and valleys; printing technique and its parameters; 2) Need for more studies on the biomolecular level to elucidate the mechanism by which the roughness and the morphology of topographical peaks and valleys descriptive of roughness influence osteoblastic adhesion and proliferation.
PubMed: 36643331
DOI: 10.1016/j.heliyon.2022.e12505 -
The Journal of Prosthetic Dentistry Nov 2022Given the wide use of cobalt-chromium (Co-Cr) alloys, especially for removable partial dentures, and the importance of chemical solutions to complement the cleaning of... (Review)
Review
STATEMENT OF PROBLEM
Given the wide use of cobalt-chromium (Co-Cr) alloys, especially for removable partial dentures, and the importance of chemical solutions to complement the cleaning of dental prostheses, safe disinfection products should be identified for the regular decontamination of Co-Cr dental prostheses.
PURPOSE
The purpose of this systematic review of in vitro studies was to determine the effects on the properties of Co-Cr dental alloys of the various chemical agents used to clean dental prostheses.
MATERIAL AND METHODS
In vitro studies were included based on a literature search conducted in March 2022 in the Medline/PubMed, SCOPUS, Web of Science, Virtual Health Library, and Embase databases. Independent reviewers performed the search, selection, extraction, and analysis of the data. The review was performed based on the Preferred Reporting Items for Systematic Review and Meta-Analysis (PRISMA) guidelines. The quality of the included articles was evaluated by using parameters adapted from the Consolidated Standards of Reporting Trials (CONSORT) guidelines, and the risk of bias analysis was performed based on previous studies.
RESULTS
Among the 15 included studies, the chemical agents evaluated were alkaline peroxides and hypochlorites, mouthwashes containing cetylpyridinium chloride and chlorhexidine, diluted acids, and enzymes. Some peroxides produced increased ion release, surface roughness, and mass loss of the alloys. The hypochlorites were responsible for the greatest surface corrosion, yielding dark stains, rough regions, and depressions. Acetic and peracetic acids and mouthwashes containing chlorhexidine and cetylpyridinium did not produce significant changes in Co-Cr alloys. Most studies presented moderate risk of bias.
CONCLUSIONS
According to the included studies, mouth rinses containing cetylpyridinium chloride or chlorhexidine and solutions with acetic and peracetic acid could be safely used to chemically sanitize Co-Cr prostheses. Alkaline peroxides should be used with caution, and alkaline hypochlorite solutions should be avoided.
PubMed: 36357193
DOI: 10.1016/j.prosdent.2022.09.013 -
The Cochrane Database of Systematic... Jul 2019Management of individuals presenting with partial loss of teeth is a common task for dentists. Outcomes important to the management of missing teeth in the partially... (Review)
Review
BACKGROUND
Management of individuals presenting with partial loss of teeth is a common task for dentists. Outcomes important to the management of missing teeth in the partially absent dentition should be systematically summarized. This review recognizes both the challenges associated with such a summarization and the critical nature of the information for patients.
OBJECTIVES
To assess the effects of different prostheses for the treatment of partially absent dentition in terms of the following outcomes: long-term success, function, morbidity and patient satisfaction.
SEARCH METHODS
We searched the Cochrane Oral Health Group's Trials Register (to 21 March 2011), the Cochrane Central Register of Controlled Trials (CENTRAL) (The Cochrane Library 2011, Issue 1), MEDLINE via OVID (1950 to March 2011) and EMBASE via OVID (1980 to March 2011). There were no restrictions regarding language or date of publication. We contacted several authors to identify non-published trials.
SELECTION CRITERIA
Randomized controlled trials (RCTs) comparing different methods (including the design and materials used) of treating partial edentulism, with clinically relevant outcomes, were included in this review. Trials reporting only surrogate outcomes, such as plaque accumulation or gingival volume, were excluded from this review.
DATA COLLECTION AND ANALYSIS
Two review authors independently carried out the screening of eligible studies, assessment of dimensions of quality of trials, and data extraction. Results were expressed as mean differences for continuous data, risk ratios for dichotomous outcomes, and hazard ratios with 95% confidence intervals for time-to-event data.
MAIN RESULTS
Twenty-one trials met the inclusion criteria for this review. Twenty-four per cent of these were assessed as being at high risk of bias and the remainder were at unclear risk of bias. The clinical heterogeneity among the included studies precluded any attempt at meta-analysis. There was insufficient evidence to determine whether one type of removable dental prosthesis (RDP) was better or worse than another. With fixed dental prostheses (FDPs), there was no evidence that high gold alloys are better or worse than other alloys, nor that gold alloys or frameworks are better or worse than titanium. There is insufficient evidence to determine whether zirconia is better or worse that other FDP materials, that ceramic abutments are better or worse than titanium, or that one cement was better or worse than another in retaining FDPs. There is insufficient evidence to determine the relative effectiveness of FDPs and RDPs in patients with shortened dental arch or to determine the relative advantages of implant supported FDPs versus tooth/implant supported FDPs.
AUTHORS' CONCLUSIONS
Based on trials meeting the inclusion criteria for this review, there is insufficient evidence to recommend a particular method of tooth replacement for partially edentulous patients.
PubMed: 31425605
DOI: 10.1002/14651858.CD003814.pub3