European Journal of Prosthodontics and Restorative Dentistry最新文献

Objective: This study aims to investigate the survival and success rates of dental veneers based on different material types and preparation designs.

Methods: A comprehensive search was conducted to identify relevant studies. Inclusion criteria limited articles to English language published in the last 27 years, resulting in 63 studies.

Results: Veneers with minimal preparation designs showed higher survival rates than extensive preparation. Incisal overlap re-establishes anterior guidance, distributing occlusal forces with the most predictable outcomes. Survival and success rates range based on material type and preparation design. Ceramic veneers demonstrated the highest survival and success rates, followed by composite veneers. Indirect composite veneers showed higher survival and success rates than direct composite veneers.

Conclusion: Scientific evidence favors minimal preparation designs for better survival rates, with clinician preference guiding design choice. Ceramic veneers consistently demonstrated higher survival and success rates than composite veneers, with both remaining viable options. Indirect composite veneers exhibited higher survival and success rates than direct composite veneers. Decision-making should consider patient needs, operator experience, and restoration longevity goals.

Clinical significance: Selecting an effective and durable prosthodontic treatment is essential in dental practice. Ceramic veneers with minimal preparation design emerged as the most preferable material.

Purpose: To assess the available evidence regarding survival and failure rates of ceramic anterior veneers constructed utilising CAD/CAM technology, with a follow-up period of at least one year.

Materials and methods: A comprehensive electronic search was performed through Medline (Ovid), Embase, and Web of Science. The search was limited to articles published from 1970 to January 2023 and, included articles were human cohort clinical studies and randomised control trials.

Results: A total of 9,449 articles were retrieved, 5,943 studies were screened and 22 were assessed for eligibility, resulting in 4 studies that met the inclusion criteria. A total of two failures were recorded, the failures involved fracture of the veneers, from a total of 1037 veneers in the included studies. No other failures were noted.

Conclusions: Studies demonstrating long term survival of CAD/CAM made ceramic veneers are limited. This study shows the clinical outcomes are favourable over the short term. Given the short observation periods reported, further long-term studies are required to obtain a better understanding of the clinical outcomes and restoration survival.

Clinical relevance: The article assists clinicians with providing an update on the available evidence when considering CAD/CAM constructed ceramic veneers on anterior teeth.

Purpose: The main problem related to conventional attachments for overdentures is the loss of retention. The purpose of this review was to analyze the mechanical properties of different polymeric attachments presented in the literature to consider their clinical use viability.

Materials and methods: This work was registered in Open Science Framework (osf. io/7j9vz) and followed the Preferred Reporting Items for Systematic Review and Meta- Analysis (PRISMA). A search of two independent reviewers of articles was performed on Embase, Pubmed, Science Direct, and Scopus databases.

Results: The databases found a total of 1803 references and 1226 articles titles. A total of 21 articles were included in this scoping review. The polymers used for manufacturing attachments were polyacetal, polylactic acid, poly(ether-ether-ketone), polytetrafluoroethylene, polyethylene, and poly(ethylene terephthalate).

Conclusion: Polyamide Locators demonstrated highest initial and final retention, indicating superior long-term stability. Among emerging materials, polyacetal and polylactic acid attachments also showed excellent retention, supporting clinical applicability.

Objective: Compare magnetic resonance imaging (MRI) protocols (T1- and T2-weighted) with cone beam computed tomography (CBCT) for measurement of bone volume and image quality in edentulous mandible during dental implant planning.

Methods: A phantom was scanned using CBCT and MRI and two examiners measured bone volume (linear measurements) and assessed image quality (visualization of anatomical structures) with 5-point scale. Linear measurement reliability was assessed with intraclass correlation coefficient, and group differences with Friedman's and Wilcoxon's tests. The image quality ratings were classified as clinically nonvalid (score≤2) or valid (score≥3), reliability was assessed with percentage of agreement, and group differences with chi-squared test.

Results: Reliability of linear measurements was mostly very good for CBCT (0.748- 0.981), good for T1-weighted (0.674-0.924), and fair to T2-weighted images (0.201- 0.851). Significant differences were observed between imaging exams (p⟨.032) and between T1- and T2-weighted images (p⟨.046), except for alveolar ridge height (p=.119). CBCT showed the highest agreement and validity (100%), followed by T2-weighted (80% agreement, 90% validity), and T1-weighted (77% agreement, 82.5% validity), with no significant differences among modalities (p=.054).

Conclusions: Compared to CBCT, T1- and T2-weighted MRI protocols had significantly lower reproducibility and accuracy in measuring bone volume, with reduced image quality, especially for visualizing the mandibular nerve canal.

Background: This systematic review and meta-analysis aimed to evaluate the effectiveness of mandibular advancement devices (MADs) in treating Obstructive Sleep Apnea (OSA), focusing on the impact of age and body mass index (BMI) on the apnea-hypopnea index (AHI) and minimum oxygen saturation (min SpO2).

Methods: A literature search was conducted in PubMed and Google Scholar for studies published from January 2013 to January 2023. Two independent authors screened the studies, assessed and evaluated risk of bias. Disagreements were resolved by consensus or consultation with a third reviewer and senior experts. The initial search yielded 1110 references, with 13 selected for inclusion.

Results: MADs significantly reduced AHI and increased min SpO2 in OSA patients. The mean difference in AHI was 15.75 (95% CI 13.19-18.30, p ⟨0.00001). Minimum SpO2 improved post-treatment (-3.70, 95% CI-5.52 to-1.88, p ⟨ 0.00001, Z = 3.98).

Conclusion: This meta-analysis demonstrated that MADs effectively reduced AHI severity and increased min SpO2 in OSA patients. While BMI had no significant effect, age had a notable impact on treatment outcomes.

Objective: Collect and synthesize data on 3D-printed resins used for single-tooth dental crowns.

Methods: A comprehensive search was conducted across MEDLINE/PubMed, Web of Science, and Scopus databases, covering publications from January 2013 to 18th August 2024. Relevant gray literature was also considered. From a total of 2803 records initially identified, 103 studies met the inclusion criteria and were included in the review.

Results: Data were extracted for 47 different 3D-printed resin materials, including information on product names, manufacturers, and chemical compositions. Mechanical properties: flexural strength (124 MPa), load to failure (1397 N), flexural modulus ( 2818 MPa), and Vickers microhardness (20.94 kgf/ mm2). Degree of conversion (27-95.2%); Wear loss (vertical loss: 62-257 μm; volumetric loss: 0.08-20 mm3); Surface roughness (Ra: 2.16 μm); Internal fit (137.26 μm), marginal fit (86.49 μm); Bond strength (16.97- 24.75 MPa). Cellular response and bacterial adhesion showed variability in biocompatibility, influenced by post-processing protocols.

Conclusions: 3D-printed resins dental crowns demonstrate promising in vitro mechanical performance, including fracture resistance values that withstand typical masticatory forces. Studies report generally favorable bond strength, and acceptable internal and marginal adaptation. However, these materials tend to exhibit lower flexural strength, elastic modulus, and hardness when compared to milled resin counterparts.

Background: Excess cement around implant-supported fixed restorations is a major shortcoming that can lead to implant-related and aesthetic-related problems. Different abutment marginal levels are cited as related to excess cement.

Methods: A comprehensive search was conducted in Medline/PubMed, Scopus, Web of Science, EMBASE, and Cochrane based on the PICO strategy up to June 2023. Two authors independently screened the titles, abstracts, and full texts subsequently. The QUIN tool and Robins-I assessed the risk of bias. A random effect model was used for meta-analysis.

Results: A total of 12 articles were included. Different abutment marginal levels including 1mm supragingival, at the gingival level, 1 mm subgingival, and 3 mm subgingival were assessed in the analysis. The combinemean excess cement of the abutment's margins 1 mm supragingival, at the gingival level, and 1mm subgingival were 0.04±0.05 (I2=84%, CI=95%), 1.09±2.0 (I2=49%, CI=95%), and 1.18±6.21 (I2=95%, CI=95%), respectively. The overall proportion of excess cement in the abutment's margins of 1 mm subgingival and 3 mm subgingival level were 0.26 (CI=95%, 0.21;0.3) and 0.29 (CI=95%, 0.25; 0.34).

Conclusion: The abutment margin level was related to residual cement. Placing the abutment margin levels more gingivally, and even supra-gingivally wherever possible, seem necessary.

Introduction: Denture base resins, both 3D-printed (PR) and heat-cured (HR), are exposed to beverages and cleansers that impact their color stability, surface roughness, and microhardness. Understanding these effects is essential for guiding clinical recommendations and optimizing material selection for long-term use.

Objectives: To evaluate the color change, roughness, and microhardness of PR and HR denture base resins after immersion in beverages and cleansers.

Methods: PR and HR samples were subjected to 5,000 thermocycling cycles in distilled water, coffee, and green tea, as well as immersion in 1% sodium hypochlorite (NaClO) and effervescent tablets (Corega Tabs®) to simulate 6 months of use. Color change was evaluated using the CIELab and CIEDE2000 systems, surface roughness using Ra and Rz parameters, and microhardness, before and after immersion.

Results: Distilled water, 1% NaClO, and effervescent tablet caused higher color changes in both PR and HR (P⟩0.05). HR showed increased roughness after immersion in 1% NaClO, effervescent tablet, and coffee (P⟨0.05). All beverages and cleansers affected PR roughness (P⟨0.05). Only 1% NaClO reduced HR microhardness (P⟨0.05).

Conclusions: Immersion in beverages and cleansers alters the color and roughness of PR and HR, with 1% NaClO causing the most significant impact on their physical and mechanical properties.

Objective: This review integrates published scientific information on the staining potential of CAD/CAM composite materials after immersion in coloring beverages, highlighting the mechanisms of action of these solutions and strategies to minimize staining.

Methods: Publications were searched in the PubMed and Scopus databases until April 2025. The search was conducted for publications in English without limits on the year of publication. The MeSH terms, free-text terms, and their combinations used in the databases were: "color", "translucency", "staining", "resin ceramic", "nanoceramic resin," and "hybrid ceramic".

Results: The search resulted in 472 articles. After removing duplicate articles, the remaining articles were evaluated in two stages. The selected articles were read in full, and 58 articles were included in this review.

Conclusions: Red wine is the beverage that most promotes staining, followed by coffee. Composite materials, especially those containing a hydrophilic resin matrix, are prone to staining over time. Bleaching can be used as an option for stain removal. In turn, periodic polishing of restorations and frequent brushing with toothpaste reduce and prevent staining caused by extrinsic pigments.

Clinical significance: Different beverages consumed by patients can stain resin-based restorative materials. Polishing, bleaching, and brushing can be used to minimize this staining.

Objectives: This study aimed to compare the effects of four remineralizing agents on post-bleaching shade stability and to evaluate the agreement between objective and subjective shade assessments.

Methodology: Forty-eight eligible patients underwent in-office bleaching with 32% hydrogen peroxide, followed by one of the following: 1. potassium nitrate/sodium fluoride (After Whitening Mousse, AWM, n=11), 2. casein phosphopeptide-amorphous calcium phosphate/fluoride (MI Paste Plus, MI, n=13), 3. nano-hydroxyapatite/fluoride (Remin Pro, RP, n=11), or 4. PolyAmidoamine Dendrimer (PAMAM, n=13). Stability was assessed using ΔE, ΔSGU, ΔL*, Δb*, and ΔWID at regular follow-ups over one year. Statistical analyses were performed using a Linear Mixed-Effects Model, Kendall's W, and Cohen's Kappa (α = 0.05).

Results: Based on linear mixedeffects model, remineralizing agents did not significantly affect ΔE, ΔSGU, ΔL*, Δb*, or ΔWID (p⟩0.05). The follow-up time had a significant effect on these color parameters (p⟨0.05). No post-bleaching shade relapse was observed in any of the experimental groups. There were slight to moderate agreements between the two evaluation methods (Kappa=0.106, W=0.504).

Conclusions: None of the remineralizing agents compromised post-bleaching shade stability. Accurate post-bleaching shade stability assessment requires both objective and subjective methods.

Clinical relevance: Bleaching stability was maintained with all remineralizing agents evaluated in this study.