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Biomimetics (Basel, Switzerland) Mar 2024The popular immediate dentin sealing (IDS) technique is used to improve the bond strength of indirect restorations. This systematic review assessed whether bond strength... (Review)
Review
The popular immediate dentin sealing (IDS) technique is used to improve the bond strength of indirect restorations. This systematic review assessed whether bond strength is affected by the type of aging conditions, bonding agents, flowable resin composites, impression materials, temporary materials, and/or resin cement used within the IDS procedure. A comprehensive database search of PubMed, Embase, Scopus, Ovid Medline, Web of Sciences, Cochrane Library, Dentistry & Oral Sciences Source, and ProQuest was carried out up to 30 January 2024 without publication year or language limitations. Only in vitro full-texts regarding the effect of IDS on bond strength were included, and the quality of their methods was assessed via a Risk of Bias (RoB) test. In total, 1023 pertinent studies were initially found, and 60 articles were selected for review after screening for the title, abstract, and full texts. IDS application improves the bond strength of indirect restorations to dentin and reduces the negative effects of temporary materials on the bond durability of final indirect restorations. Filled dentin bonding agents or combinations with flowable resin composite are preferred to protect the IDS layer from conditioning procedures.
PubMed: 38534867
DOI: 10.3390/biomimetics9030182 -
The Saudi Dental Journal Jul 2023Lithium disilicate glass-ceramic (LDC) restorations exhibit microorganism infiltration, recurrent caries, pulpal lesions, periodontal inflammation, and cement exposure... (Review)
Review
INTRODUCTION
Lithium disilicate glass-ceramic (LDC) restorations exhibit microorganism infiltration, recurrent caries, pulpal lesions, periodontal inflammation, and cement exposure to the oral environment over time. All these factors lead to restoration failure. This systematic review aimed to investigate the clinical outcomes of LDC full-coverage crowns (FCC) in permanent teeth compared with those of other full-coverage restoration materials.
MATERIALS & METHODS
Search strategies were developed for four databases: Web of Science, OVID, PubMed, and Scopus. Data extraction and quality appraisals were performed by two independent reviewers. Data on the presence of caries, post-operative sensitivity, and periodontal changes were extracted from the included clinical studies. In addition to the outcome measures, data on the sample size, study groups, method of restoration fabrication, type of impression, and type of abutment were recorded.
RESULTS
We retrieved 3989 records for the title and abstract screening. Of these, 19 clinical studies met the inclusion criteria. The overall quality of the included studies indicates a low risk of bias. Most studies reported no pulpal involvement, recurrent caries, or post-operative sensitivity and presented a favorable periodontal response after the cementation of LDC-FCC during different follow-up periods.
CONCLUSION
Based on the endodontic and periodontic clinical responses of natural tooth abutments and their supporting periodontium, LDC-FCC can be considered a clinically successful restorative option.
PubMed: 37520610
DOI: 10.1016/j.sdentj.2023.05.012 -
Heliyon May 2024The objective of the systematic review is to find an answer to a question: "What is the influence of the building direction of titanium implants produced by additive... (Review)
Review
The objective of the systematic review is to find an answer to a question: "What is the influence of the building direction of titanium implants produced by additive manufacturing on their physical and mechanical properties?" This review followed the Preferred Reporting Items for Systematic Review and Meta-Analysis (PRISMA 2020) and was registered in the Open Science Framework (OSF) (osf.io/rdc84). Searches were performed in PubMed, Scopus, Science Direct, Embase, and Google Scholar databases on February 17th, 2024. Articles were chosen in 2 steps by 2 blinded reviewers based on previously selected inclusion criteria: In vitro studies that evaluated the influence of the impression direction of titanium implants produced by additive manufacturing on their physical and mechanical properties were selected. Articles were excluded that (1) did not use additive technology to obtain the implants, 2) used surfaces other than titanium, 3) did not evaluate the direction of impression, 4) Studies with only in vivo analyses, clinical studies, systematic reviews, book chapters, short communications, conference abstracts, case reports, and personal opinions.). In the initial search, 581 results were found. Of this total, 108 were excluded for duplication and, after applying the eligibility criteria, 16 articles were included in the present review. The risk of bias was analyzed using the RoBDEMAT. The risk of bias was analyzed using the RoBDEMAT. In addition, the coefficient of interagreement of the reviewers (Cohen's Kappa) and the certainty of evidence by GRADE were analyzed. In general, different impression angles showed variations in the physical and mechanical characteristics of the groups evaluated, including roughness, tensile strength, hardness, and modulus of elasticity. While some impression orientations resulted in greater strength or hardness, others showed greater elasticity or lower surface roughness. These findings suggest that print orientation plays a significant role in determining material properties. It can be concluded that printing directions influence the physical and mechanical properties of titanium implants and the studies included showed that the 0°, 45°, and 90° directions are the most evaluated as they present lower probabilities of structural anisotropies and provide better results in their roughness, hardness, tensile and compressive strength.
PubMed: 38774089
DOI: 10.1016/j.heliyon.2024.e30108 -
The Journal of Prosthetic Dentistry Dec 2021Parallel dental implants improve prosthesis longevity and facilitate the impression making steps when compared with angled implants. The effect of implant angulation on... (Review)
Review
STATEMENT OF PROBLEM
Parallel dental implants improve prosthesis longevity and facilitate the impression making steps when compared with angled implants. The effect of implant angulation on the accuracy of casts generated by using intraoral scanners has not been fully investigated.
PURPOSE
The present systematic review addressed following the patient, intervention, control, and outcome (PICO) question: Does implant position affect the intraoral scanning accuracy of arches that will receive complete-arch implant-supported fixed dental prostheses?
MATERIAL AND METHODS
A bibliographic search was performed in the Medline-PubMed, Scopus, Web of Science, and Cochrane Library databases by using specific descriptors for studies published until July 2020. All studies evaluated the intraoral scanning accuracy of arches rehabilitated with multiple implants through implant linear and/or angular deviation.
RESULTS
Eight in vitro studies that met the eligibility criteria were evaluated. Five publications showed lower linear and angular displacements for the digital scans compared with the conventional technique. Two studies showed that the digital scan presented higher angular and linear distortions than the conventional technique. Only 1 study did not find differences between the 2 recording methods.
CONCLUSIONS
Digital scanning is reliable. However, caution is needed concerning its indication, especially in patients where the angles between implants are greater than 15 degrees. The association of the implant angulation with the clinical factors needs to be further investigated. The absence of clinical evidence and methodological heterogeneity limited the results of this study.
Topics: Computer-Aided Design; Dental Implants; Dental Impression Technique; Humans; Models, Dental; Mouth, Edentulous
PubMed: 33268069
DOI: 10.1016/j.prosdent.2020.09.008 -
The Journal of Prosthetic Dentistry Jan 2021Unsatisfactory adaptation of restorations with subgingival margins can cause problems such as accumulation of biofilm, secondary caries, and inflammation of the... (Meta-Analysis)
Meta-Analysis
STATEMENT OF PROBLEM
Unsatisfactory adaptation of restorations with subgingival margins can cause problems such as accumulation of biofilm, secondary caries, and inflammation of the periodontal tissue. Therefore, special attention should be given to gingival displacement and impression procedures to optimize marginal fit.
PURPOSE
The purpose of this systematic review and meta-analysis was to compare gingival displacement with conventional cords and cordless techniques and determine the reliability of the measurement methodologies.
MATERIAL AND METHODS
This study followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement and identified studies through September 2018. The studies were submitted to the Cochrane risk-of-bias assessment. The gingival displacement was evaluated by using the Review Manager Software.
RESULTS
Nine studies were selected, and the most common risks of bias were random sequence generation, blinding of outcome assessment, and absence of sample size calculation. Most of the studies reported obtaining a width greater than 0.2 mm.
CONCLUSIONS
The cord technique resulted in increased displacement when compared with the cordless technique. The evaluation of sulcular width with digital microscope images obtained from sectioned gypsum casts is an adequate and versatile experimental methodology for measuring displacement.
Topics: Gingiva; Gingival Retraction Techniques; Humans; Reproducibility of Results
PubMed: 32008797
DOI: 10.1016/j.prosdent.2019.09.009 -
Clinical Oral Implants Research Oct 2012The objectives of the review were (1) to evaluate the accuracy of implant-level impressions in cases with internal and external connection abutments/reconstructions, and... (Review)
Review
OBJECTIVES
The objectives of the review were (1) to evaluate the accuracy of implant-level impressions in cases with internal and external connection abutments/reconstructions, and (2) to evaluate the incidence of technical complications of internal and external connection metal- or zirconia-based abutments and single-implant reconstructions.
MATERIALS AND METHODS
A MEDLINE electronic search was conducted to identify English language publications in dental journals related to each of the two topics by inserting the appropriate keywords. These electronic searches were complemented by a hand search of the January 2009 to January 2012 issues of the following journals: Clinical Oral Implants Research, The Journal of Prosthetic Dentistry, The International Journal of Prosthodontics, The International Journal of Periodontics and Restorative Dentistry, The International Journal of Oral Maxillofacial Implants, Clinical Implant Dentistry and Related Research.
RESULTS
Seven in vitro studies were included in the review to evaluate the accuracy of implant-level accuracy. No clinical study was found. There was no study that directly compared the influence of internal and external implant connections for abutments/reconstructions on the accuracy of implant-level impressions. All in vitro studies reported separately on the two connection designs and they did not use same protocol and, therefore, the data could not be compared. Fourteen clinical studies on metal-based abutments/reconstructions and five clinical studies on zirconia-based abutments/reconstructions satisfied the inclusion criteria and, therefore, were included in the review to evaluate the incidence of technical complications. The most frequent mechanical complication found in both implant connection design when employing metal abutments/reconstructions was screw loosening.
CONCLUSIONS
Implant-level impression accuracy may be influenced by a number of variables (implant connection type, connection design, disparallelism between multiple implants, impression material and technique employed). Implant divergence appears to affect negatively impression accuracy when using internal connection implants. Based on the sparse literature evaluating the incidence of technical complications of metal or zirconia abutments/reconstructions, it was concluded that: The incidence of fracture of metal-based and zirconia-based abutments and that of abutment screws does not seem to be influenced by the type of connection. Loosening of abutment screws was the most frequently occurring technical complication. The type of connection seems to have an influence on the incidence of the screw loosening: more loose screws were reported for externally connected implant systems for both types of materials. However, proper preload may decrease the incidence of such a complication.
Topics: Bone Screws; Dental Implant-Abutment Design; Dental Implantation, Endosseous; Dental Implants; Dental Impression Technique; Dental Prosthesis, Implant-Supported; Dental Restoration Failure; Humans; Metals; Models, Dental; Postoperative Complications; Zirconium
PubMed: 23062143
DOI: 10.1111/j.1600-0501.2012.02556.x -
Journal of Healthcare Engineering 2020The purpose of this systematic review was to compare the accuracy of the three-dimensional images among different scanners, scanning techniques, and substrates. .... (Review)
Review
INTRODUCTION
The purpose of this systematic review was to compare the accuracy of the three-dimensional images among different scanners, scanning techniques, and substrates. . Electronic databases (PubMed and Elsevier) were searched until March 2020. The systematic search was performed to identify the most precise method of obtaining a 3D image of the dentition.
RESULTS
Thirteen articles out of 221, considering the accuracy of 3D images, were selected. The main factors that are considered to have an influence on the precision are substrate type in the oral cavity, experience of the scanner's operator, direct vs. indirect scanning, and the reproducibility of the procedure.
CONCLUSION
Substrate type does have an impact on the overall accuracy of intraoral scans where dentin has the most and enamel the least accurately recorded dental structure. Experience of the operator has an influence on the accuracy, where more experienced operators and smaller scan sizes are made for more accurate scans. A conventional impression technique in a full-arch image provided the lowest deviation. The reproducibility of direct scanning was comparable to indirect scanning although a slight difference was noticeable (0.02 mm).
Topics: Computer-Aided Design; Dental Impression Technique; Humans; Imaging, Three-Dimensional; Models, Dental; Mouth; Reproducibility of Results; Research Design
PubMed: 33414902
DOI: 10.1155/2020/8854204 -
Journal of Prosthodontics : Official... Jul 2021To systematically review clinical and laboratory studies that investigated the accuracy of intraoral scanners in recording denture bearing areas. (Review)
Review
PURPOSE
To systematically review clinical and laboratory studies that investigated the accuracy of intraoral scanners in recording denture bearing areas.
MATERIALS AND METHODS
Electronic and manual searches were conducted to identify all the available clinical and laboratory studies reporting the accuracy of digital impressions for recording denture related soft tissues. After the application of predetermined inclusion and exclusion criteria, the final list of articles was reviewed to meet the objective of this study.
RESULTS
The inclusion criteria were met by 18 studies out of which 8 were clinical and the rest were laboratory investigations. The eligible studies assessed the accuracy of intraoral scanners in recording both the denture supporting structures and the peripheral mobile tissues. The accuracy results were different among the various intraoral scanners. Likewise, the effect of several influencing factors, such as artificial markers, scanner head size, scanning strategy, and the operator's experience, were evaluated.
CONCLUSION
While the accuracy of intraoral scanners was comparable to the conventional techniques in recording bony structures with attached mucosa, they were not capable of accurately registering the mobile tissues. In addition, factors such as presence of a marker, larger scanner head size and specific scanning techniques appeared to improve the accuracy of the digital impression.
Topics: Computer-Aided Design; Dental Impression Technique; Dentures; Imaging, Three-Dimensional; Models, Dental
PubMed: 33554361
DOI: 10.1111/jopr.13345 -
The International Journal of... 2022To evaluate the accuracy of virtual static articulation and to determine factors that affect its accuracy.
PURPOSE
To evaluate the accuracy of virtual static articulation and to determine factors that affect its accuracy.
MATERIALS AND METHODS
An electronic search up to December 21, 2020 was carried out in the PubMed, Cochrane, and EMBASE databases, and further searching was performed in the references of the evaluated articles. Studies were included if they were published in a peer-reviewed journal in English, were a clinical or laboratory study assessing only static virtual articulation accuracy without making computer-aided manufacturing restorations, used intraoral scanner (IOS) or extraoral scanner (EOS) systems, and evaluated tooth or implant cases.
RESULTS
After applying the inclusion criteria, a total of 28 studies were analyzed. Nine were clinical, and 19 were laboratory. Most of the studies indicated that virtual static articulation had a comparable accuracy to conventional methods in the presence of completely dentate arches, stable occlusal contacts, a single prepared tooth, or arches involving a single missing posterior tooth. The factors that appeared to influence the accuracy were the articulation technique, number, dimension, and location of virtual interocclusal records (VIRs), the length of articulated scans, and the position and size of edentulous areas.
CONCLUSION
Though conclusions were derived mainly from laboratory studies, static VIR had an acceptable accuracy in the presence of certain situations.
Topics: Humans; Imaging, Three-Dimensional; Computer-Aided Design; Mouth, Edentulous; Dental Impression Technique
PubMed: 35349610
DOI: 10.11607/ijp.7407 -
The Cochrane Database of Systematic... Jan 2007Preformed metal crowns (PMCs) are recommended by the British Society of Paediatric Dentistry (BSPD) for restoring badly broken down primary molar teeth. However, few... (Review)
Review
BACKGROUND
Preformed metal crowns (PMCs) are recommended by the British Society of Paediatric Dentistry (BSPD) for restoring badly broken down primary molar teeth. However, few dental practitioners adopt this technique in clinical practice, citing cost and clinical difficulty as reasons for this. Whilst there is a subjective impression by clinical academics that PMCs provide a more durable restoration than filling materials, there appears to be little evidence within the literature to support this.
OBJECTIVES
The primary aim of this systematic review was to compare clinical outcomes for primary molar teeth restored using PMCs compared to those restored with filling materials.
SEARCH STRATEGY
The literature was searched using: the Cochrane Central Register of Controlled Trials (CENTRAL) (The Cochrane Library 2005, Issue 3); MEDLINE (1966 to August 2005); EMBASE (1980 to August 2005); System for Information on Grey Literature in Europe (SIGLE) (1976 to August 2005). Relevant publications' reference lists were reviewed for relevant articles. The most recent search was carried out on 24 August 2005.
SELECTION CRITERIA
Randomised controlled trials (RCTs) that assessed the effectiveness of PMCs compared with filling materials or where there had been no treatment in children with untreated tooth decay in one or more primary molar teeth.
DATA COLLECTION AND ANALYSIS
Two review authors independently assessed the title and abstracts for each article from the search results to decide whether it was likely to be relevant. Full papers were obtained for relevant articles and all three review authors studied these.
MAIN RESULTS
Forty-seven records were retrieved by the search strategies of which some were duplicates. Of these, 14 studies were scrutinised. No studies met the inclusion criteria and six studies were excluded from the review as they were either retrospective in design or reported as prospective outcomes but not randomised. No data were available for extraction and analysis and therefore, no conclusion could be made as to whether PMCs were more successful than filling materials for restoring primary molar teeth.
AUTHORS' CONCLUSIONS
No RCTs were available for appraisal. Whilst this technique is recommended by the BSPD for use in clinical practice, the evidence to support this is not strong, consisting mainly of case reports and uncontrolled studies. It is important that the absence of evidence for PMCs is not misinterpreted as evidence for their lack of efficacy. There is a strong need for prospective RCTs comparing PMCs and fillings for managing decayed primary molar teeth. The lower levels of evidence that have been produced, however, have strength in that the clinical outcomes are consistently in favour of PMCs, despite many of the studies placing PMCs on the most damaged of the pair of teeth being analysed.
Topics: Child; Crowns; Dental Caries; Humans; Molar; Tooth, Deciduous
PubMed: 17253559
DOI: 10.1002/14651858.CD005512.pub2