European Journal of Prosthodontics and Restorative Dentistry最新文献

Objective: To perform a systematic review of in vitro studies examining endodontically treated anterior teeth restored with fiberglass posts versus composite posts reinforced with: polyethylene fibers (Ribbond), fiber-reinforced resin (everStick) and composite resin (everX).

Methods: The search was performed using PubMed, Scopus, Web of Science and LILACS. The studies were selected by two independent reviewers. To assess the risk of bias of each study, the QUIN tool was used. We analyzed the data using a narrative synthesis.

Results: Five articles were retained for final analysis. The risk of bias was moderate to high. Most studies reported non-catastrophic failures. With 72 non-catastrophic failures for the glass fiber group and 60 for the fiber-reinforced resins. Catastrophic failures were more prevalent in fiber-reinforced composite, especially in the Ribbond-treated group.

Conclusion: Within the limitations of this study, the use of fiberreinforced composites as custom intracanal posts is still questionable, with controversial results. It is not possible to establish the superiority of one approach over the other in endodontically treated anterior teeth without ferrule.

Clinical relevance: It was not possible to identify a superior performance among the approaches analyzed for the restoration of endodontically treated anterior teeth without ferrule.

This systematic review gathered evidence to identify the influence of roughness on titanium surfaces on the adhesion of hydroxyapatite coatings. This research followed the PRISMA guidelines and was registered on the Open Science Framework (osf.io/cxrsf). In vitro studies were searched on Science Direct, PubMed, Embase, Scopus, Google Scholar and in the references of the articles included. Two independent reviewers selected the studies based on the inclusion and exclusion criteria. The risk of bias analysis was carried out using the adapted Joanna Briggs Institute quasi-experimental study tool. 2890 articles were found and after applying the selection criteria 22 were chosen to be read in full. 9 studies were excluded because they did not evaluate substrate roughness or coating adhesion. Finally, 13 studies composed this systematic review. Of these, 4 indicated that greater titanium roughness provides better adhesion of the hydroxyapatite coating, 7 that in addition to roughness, other factors play a role in this process, and 2 other studies presented divergent results. Surface roughness has influence on the adhesion of hydroxyapatite coatings to titanium. However, the type of titanium alloy, the thickness of the coating and other characteristics also affect the adhesion process and should be considered.

Introduction: It is unclear the number of times a screwdriver may be reused without loosening its efficacy or inducing damage to implant screws while keeping appropriate torque values.

Objective: Evaluate the effect of the screwdriver and internal threads on the tightening efficacy by assessing the reverse torque value (RTV).

Methods: The efficacy was tested with four groups of screws: two titanium groups and two gold-platted (n=5). Each screw was tightened 10 times at 20 Ncm using the screwdriver attached to ISD900 (NSK®). In the first protocol one implant was used for the five screws. In the second protocol for each screw a new implant was used. At each untightening, the RTV was measured and recorded.

Results: RTVs for Gold were statistically lower compared to the Titanium. The RTVs differed among the tested screws. In the first protocol, the first serie tightening/untightening differed statistically from the last three series.

Conclusion: Titanium screws from Zimmer Biomet achieve better RTV than gold-platted. By increasing the number cycles it is expected to have a decrease in the RTV. The extensive use of screwdrivers and the internal threads of the dental implants might be factors influencing the loss of RTV.

Objectives: To report one-year outcomes of prosthetic rehabilitation of the atrophic maxillae, supported by angled abutments on zygomatic implants and conventional implants.

Methods: In the present retrospective analysis, edentulous maxillary areas treated with fixed-hybrid prostheses supported by angled abutments of 45, 52.5, and 60 degrees screwed to zygomatic implants inserted using an extrasinus surgical approach were included. Prosthesis, implant, and abutment success/survival rates, complications, Mucosal Seal Efficacy Evaluation (MSEE), modified PLaque Index (mPLI), modified Bleeding Index (mBI), and Zygomatic Implants Classification Level (ZICL) were assessed.

Results: Ninety-eight straight implants and 81 zygomatic implants (21 abutments of 45 degrees, 23 of 52.5 degrees, and 37 of 60 degrees) were inserted into 35 patients. Biological complications: postoperative sinus opacity was observed in seven patients, two of whom experienced a unilateral perforation of the sinus membrane. ZICL0-1 was recorded in 95% of zygomatic sites; the cumulative success rates were 100% and 94.3% when using the implant and prosthesis as units of analysis, respectively.

Conclusion: Survival rate for the implants attested to the highest percentage (100%), whereas survival rate of the prostheses was 94.3%. No differences were registered among the clinical indices related to different inclinations of the abutments.

Aim: To compare the tensile strength, dislodgement forces, marginal gap and failure types between digitally fabricated zirconia root copings and conventionally manufactured cast gold root copings.

Methods: Extracted human teeth (N=30) were prepared for the root copings and randomly divided into 2 groups: (1)zirconia root copings(ZC) and gold root copings(GC). The specimens were tested for tensile bond strength and dislodgement forces in a universal testing machine and the types of the coping failures modes were analyzed. In addition, the marginal gap was measured. Data were analyzed using one-way ANOVA and Pearson correlation test.

Results: Mean tensile bond strength in the total horizontal adhesive area for ZC group was 7.5±2.8MPa and for GC group 10.5±4.8 MPa(p⟩0.05). The mean dislodgement forces for the ZC and GC groups were 242±107N and 311±118N, respectively and with no significant differences between the groups (p=0.12). The mean vertical marginal gap in the ZC group amounted to 27±11.05μm, while in the GC group it was 35.33±10.49μm, showing no statistically significant difference between the two groups (p=0.058). Mixed failure modes were more common (93%) in both groups.

Conclusions: In terms of all tested parameters, the zirconia root copings were comparable to the gold copings.

I would like to greet you all as the incoming Editor-in-Chief of the European Journal of Prosthodontics and Restorative Dentistry (EJPRD) which has a history of over 60 years. Back in 1965, the journal was initially named 'Journal (Anglo-Continental Dental Society)' which was published semi-annually by the same society. In 1984, A.E. Morgan Publications started publishing the journal as 'Restorative Dentistry' associated with the British Society for Restorative Dentistry (inaugurated 1968). In 1992, the journal was renamed as "European Journal of Prosthodontics and Restorative Dentistry" and became a new peer-reviewed medical journal under the leadership of the founding Editorin- Chief, Prof. Paul S. Wright, published by Mosby-Year Book Europe Ltd., which was already then abstracted and indexed in MEDLINE/Pubmed. In 2012, and until now, the publisher became Stephen Hancocks Ltd. in association with Dennis Barber Ltd. Later in 2021, Editor-in chief, Prof. Will Palin, who served between 2015-2024, together with the publisher Dennis Barber Ltd., took the journal online and also helped the journal gain an impact factor.

Objectives: Using computer-aided design and manufacturing (CAD-CAM) technology in restorative dentistry increased the application of lithium disilicate (LD) materials. The bond strength to core and repairing materials is crucial in the restoration's longevity. This systematic review evaluates the shear bond strength (SBS) of CAD-CAM-LD restorative materials to other materials using different surface treatments.

Methods: An electronic literature search was performed through PubMed/Medline, Embase, Web of Science, Scopus, and Google Scholar. Studies were selected based on specific criteria. The risk of bias was assessed using the Joanna Briggs Institute Critical Appraisal Checklist for Quasi-Experimental Studies.

Results: Eleven studies were included, primarily investigating composite resin as the repair material. SBS values ranged from 0.82 to 32.96MPa, with the highest values observed for IPS e.max-CAD subjected to silicon carbide polishing, hydrofluoric acid (HF) etching, and silane application. For core materials, the highest SBS was reported for HFtreated IPS e.max-CAD bonded to tribochemically coated titanium and air-abraded zirconia, with SBS values ranging from 5.88 to 34MPa.

Conclusions: This review indicates that HF etching combined with silane application is the most effective method for improving bond strength in CAD/CAM-LD restorations. Applying surface treatments to both the core material and CAD/CAM-LD can further enhance bond strength.

This study evaluated the clinical performance of a polymer-infiltrated ceramic-network (PICN) material for up to 3 years. Patients (N=286) received 581 indirect restorations as crowns (417), overlays (131), and inlays/veneers (33) fabricated using the PICN (VITA Enamic) by CAD/CAM procedures using intraoral scanning (Cerec Omnicam) and milling systems (Cerec MC XL). The restorations were evaluated annually and in case of complications. Data were analyzed using Kaplan-Meier estimate. Complications were classified as biological or technical failures. Until final recall (mean observation period: 18.3 months) with a dropout rate of 4.8%, 3 biological and 10 technical complications were observed. The overall success rate of the placed restorations was 97.7%. Biological complications included pulpitis and pulp necrosis. Technical complications were debonding (n=7) and fracture (n=3). PICN materials can be used as an alternative to lithium-disilicate or zirconium dioxide for single tooth reconstructions, providing that early failures included debonding and fractures.

Purpose: To systematically review the literature and assess the success and survival rates of anterior composite restorations used in the management of anterior tooth surface loss, and to estimate complete posterior occlusion re-establishment when a Dahl approach is utilized.

Materials and methods: An electronic search was performed in the following databases: MEDLINE via Ovid and Scopus, for articles published from 1970 to November 2020. The systematic review was performed according to the PRISMA and Meta-analyses guidelines. Only randomized and non-randomized clinical trials, and Cohort studies that involved the exclusive use of direct/indirect anterior composite restorations for the management of localized anterior tooth wear were included.

Results: From the 724 studies identified through the initial search, six studies fulfilled the inclusion criteria and were included in the review; three prospective and three retrospective. In total, 141 patients received 1068 direct and indirect composite restorations. Follow-up periods ranged between 5 months and 10 years. The survival rate for anterior composite resin restorations reported in this review was 88% (95% CI: 70% to 98%) over a period of 2 and 10 years; however, high heterogeneity was observed amongst included studies; (I² = 97%). Sensitivity analysis reported survival rates of these restorations of 93% (95% CI: 85% to 98%) over a period of 2 and 7 years, (I² = 83%). Success rates were reported for these restorations of 68% (95% CI: 44% to 87%) over a period of 2 and 10 years, high heterogeneity; (I² = 98%). The success of composite Dahl in re-establishing posterior occlusion was 85% (CI: 73% to 94%).

Conclusions: The result of this systematic review and meta-analysis support the use of anterior composite restorations as a short-medium term option for the management of tooth wear. In the long-term, patients should be informed that these restorations will require monitoring, repairs, or replacements.

Purpose: The purpose of this invitro study was to assess the changes in the color attributes of high-translucency (HT) lithium disilicate and zirconia-reinforced lithium silicate in BL3/0M1, A1, A2, and A3 shades during first, second, and third firing cycles.

Materials and methods: Eighty specimens of two ceramic systems (IPS e.max CAD and Vita Suprinity) in BL3/0M1, A1, A2, and A3 shades, were prepared in thickness of 1 mm (n=10). Each group was subjected to 3 firing cycles and the CIE L*a*b* color parameters of specimens were measured after each firing cycle by a reflectance spectrophotometer. The color change (ΔE) between each two firing cycles was calculated by the relevant equation. Data were analyzed by one-way ANOVA and Tamhane post hoc test.

Results: All ΔE values were significant (P⟨0.001) except for ΔE2-1 (color difference between second and first firing) and ΔE3-2 (color difference between third and second firing) in A2 shade of IPS e.max (P=0.436) and ΔE2-1 and ΔE3-2 in 0M1 shade of Suprinity (P=0.345).

Conclusion: Repeated firing resulted in generally higher ΔE in ZLS than LDS, and 0M1 Suprinity experienced maximum ΔE after repeating firing.