scholarly journals Comparison of Fracture Strengths of Three Provisional Prosthodontic CAD/CAM Materials: Laboratory Fatigue Tests

2021 ◽  
Vol 11 (20) ◽  
pp. 9589
Author(s):  
José Manuel Mendes ◽  
Pedro Colaço Botelho ◽  
Joana Mendes ◽  
Pedro Barreiros ◽  
Carlos Aroso ◽  
...  
Keyword(s):  
Fracture Resistance ◽  
Composite Resin ◽  
Intermediate Phase ◽  
Fatigue Tests ◽  
Oral Rehabilitation ◽  
South Tyrol ◽  
Polyether Ether Ketone ◽  
Cad Cam ◽  
Ether Ketone ◽  
Materials Used

Temporary restorations play a fundamental role in oral rehabilitation. They can be used on teeth or implants for a variable period of time during the period prior to rehabilitation with definitive restorations. Temporary or provisional restorations manufactured via CAD/CAM methods are becoming increasingly used in the intermediate phase of the treatment of complex cases. The main objective of this study was to compare the fracture resistance of three materials used in the creation of provisional crowns on implants: polymethyl methacrylate (PMMA), composite resin, and polyether ether ketone (PEEK). Fracture resistance in PMMA (Zirkonzahn Temp Basic® , Gais, South Tyrol, Italy) ranged from 1216.0 N to 1461.2 N, with a mean of 1300.4 N (SD = 97.09). In the composite material (3M Lava Ultimate®, Minnesota, USA), fracture resistance varied between 1343.5 N and 1490.6 N, with a mean of 1425.9 N (SD = 49.03). Lastly, in PEEK (Tecno Med Mineral®, Zirkonzahn®, Gais, South Tyrol, Italy), fracture resistance ranged from 2294.8 N to 2451.7 N, with a mean of 2359.5 (SD = 50.01). The crowns made with the PEEK Tecno Med Mineral® (Zirkonzahn®, Tyrol, Italy) material presented the best fracture resistance, followed by the crowns made with the Lava Ultimate® (3M® ESPE, Minnesota, USA) composite resin material and, finally, those made with the PMMA Temp Basic® (Zirkonzahn®, Tyrol, Italy) material.

scholarly journals Effect of Surface Treatment With Er:YAG and CO2 Lasers on Shear Bond Strength of Polyether Ether Ketone to Composite Resin Veneers

2020 ◽  
Vol 11 (2) ◽  
pp. 153-159
Author(s):  
Yousef Jahandideh ◽  
Mehran Falahchai ◽  
Hossein Pourkhalili
Keyword(s):  
Surface Treatment ◽  
Co2 Laser ◽  
Shear Bond Strength ◽  
Composite Resin ◽  
Er:Yag Laser ◽  
Irradiation Time ◽  
Polyether Ether Ketone ◽  
Ether Ketone ◽  
Dunnett's Test ◽  
Effect Of Surface

Introduction: Polyether ether ketone (PEEK) has low surface energy and high resistance to chemical surface treatments. Therefore, different surface treatments such as laser conditioning should be investigated. There is a gap of information regarding the efficacy of laser irradiation in the surface treatment of PEEK, and the efficacy of several laser types needs to be evaluated for this purpose. This study aimed to assess the effect of surface treatment with erbium-doped yttrium aluminum garnet (Er:YAG) and carbon dioxide (CO2) lasers on shear bond strength (SBS) of PEEK to composite resin veneers. Methods: In this experimental study, 60 rectangular-shaped PEEK samples (7 x 7 x 2 mm) were used. The samples were mounted in auto-polymerizing acrylic resin in such a way that only one surface measuring 7x7 mm remained exposed. The samples were then randomly divided into 3 groups (n=20) of control, Er:YAG laser surface treatment (Power=1.5 W, energy density=119.42 J/cm2 , irradiation time=20 s) and CO2 laser surface treatment (Power=4 W, energy density=159.22 J/cm2 , irradiation time=50 s). The bonding agent and PEEK opaque were applied on the surface of samples and they were veneered with a composite resin using a hollow plastic cylinder with an internal diameter of 4 mm. The SBS was then measured and the data were analyzed using one-way ANOVA, Tukey HSD test and Dunnett’s test at 0.05 level of significance. Results: The SBS of the 3 groups was significantly different (P<0.001). The Tukey HSD test revealed that the Er:YAG laser had higher SBS than the CO2 laser group (P<0.001). The Dunnett’s test showed that both Er:YAG and CO2 laser groups yielded higher SBS than the control group (P<0.001). Conclusion: The Er:YAG and CO2 laser treatments can increase the SBS of PEEK to composite resin veneers, although the Er:YAG laser seems to be more effective for this purpose.

scholarly journals Effect of Differences in Axial Thickness and Type of Cement on Fracture Resistance in Composite Resin CAD/CAM Crowns

2019 ◽  
Vol 60 (1) ◽  
pp. 17-27 ◽  
Author(s):  
Tomotoshi Masuda ◽  
Syuntaro Nomoto ◽  
Toru Sato ◽  
Yuuhei Kanda ◽  
Takanori Sakai ◽  
...  
Keyword(s):  
Fracture Resistance ◽  
Composite Resin ◽  
Cad Cam

scholarly journals Esthetic rehabilitation with modified PEEK using analogue-digital protocol

2021 ◽  
Vol 7 (2) ◽  
pp. 109-113
Author(s):  
Vijaya Kumar R ◽  
Rahul Bahri ◽  
Parag Dua ◽  
Avina Banari
Keyword(s):  
High Performance ◽  
Biological Tissues ◽  
Missing Teeth ◽  
Long Span ◽  
Anterior Teeth ◽  
Polyether Ether Ketone ◽  
High Performance Polymer ◽  
Literature Evidence ◽  
Cad Cam ◽  
Ether Ketone

With the advancing digital technology and introduction of newer biocompatible materials with properties similar to biological tissues, CAD CAM fabricated restorations are gaining wide popularity. Introduction of Zirconia and BioHPP (High Performance Polymer) Polyether-ether-ketone (PEEK) has widened the horizons of clinical prosthodontics. Its use has been successfully demonstrated in implantology for fabrication of frameworks and as substructures for replacement of missing teeth. Literature evidence and clinical reports highlighting their usage for long span FDPs is however scanty. This article aims to highlight a combination of digital-analogue procedure for successful rehabilitation of mutilated and missing anterior teeth in a young adult using virtual articulator, modified Bio-HPP PEEK restorations and manufacturer recommended Visio.lign system.

scholarly journals Combining Intraoral and Face Scans for the Design and Fabrication of Computer-Assisted Design/Computer-Assisted Manufacturing (CAD/CAM) Polyether-Ether-Ketone (PEEK) Implant-Supported Bars for Maxillary Overdentures

Scanning ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-14 ◽  
Author(s):  
Francesco Mangano ◽  
Carlo Mangano ◽  
Bidzina Margiani ◽  
Oleg Admakin
Keyword(s):  
Soft Tissues ◽  
Previous Treatment ◽  
Digital Impression ◽  
Computer Assisted ◽  
Success Rates ◽  
Computer Assisted Design ◽  
Polyether Ether Ketone ◽  
Cad Cam ◽  
Passive Fit ◽  
Ether Ketone

Purpose. To present a digital method that combines intraoral and face scanning for the computer-assisted design/computer-assisted manufacturing (CAD/CAM) fabrication of implant-supported bars for maxillary overdentures. Methods. Over a 2-year period, all patients presenting to a private dental clinic with a removable complete denture in the maxilla, seeking rehabilitation with implants, were considered for inclusion in this study. Inclusion criteria were fully edentulous maxilla, functional problems with the preexisting denture, opposing dentition, and sufficient bone volume to insert four implants. Exclusion criteria were age<55 years, need for bone augmentation, uncompensated diabetes mellitus, immunocompromised status, radio- and/or chemotherapy, and previous treatment with oral and/or intravenous aminobisphosphonates. All patients were rehabilitated with a maxillary overdenture supported by a CAD/CAM polyether-ether-ketone (PEEK) implant-supported bar. The outcomes of the study were the passive fit/adaptation of the bar, the 1-year implant survival, and the success rates of the implant-supported overdentures. Results. 15 patients (6 males, 9 females; mean age 68.8±4.7 years) received 60 implants and were rehabilitated with a maxillary overdenture supported by a PEEK bar, designed and milled from an intraoral digital impression. The intraoral scans were integrated with face scans, in order to design each bar with all available patient data (soft tissues, prosthesis, implants, and face) in the correct spatial position. When testing the 3D-printed resin bar, 12 bars out of 15 (80%) had a perfect passive adaptation and fit; in contrast, 3 out of 15 (20%) did not have a sufficient passive fit or adaptation. No implants were lost, for a 1-year survival of 100% (60/60 surviving implants). However, some complications (two fixtures with peri-implantitis in the same patient and two repaired overdentures in two different patients) occurred. This determined a 1-year success rate of 80% for the implant-supported overdenture. Conclusions. In this study, the combination of intraoral and face scans allowed to successfully restore fully edentulous patients with maxillary overdentures supported by 4 implants and a CAD/CAM PEEK bar. Further studies are needed to confirm these outcomes.

Fatigue and fracture resistance and survival of occlusal veneers of composite resin and ceramics blocks in posterior teeth with occlusal wear: A protocol for a systematic review

2021 ◽  
Author(s):  
KARELYS MALDONADO ◽  
◽  
JUAN ESPINOZA ◽  
DANIELA ASTUDILLO ◽  
WILSON BRAVO
Keyword(s):  
Systematic Review ◽  
Fracture Resistance ◽  
Composite Resin ◽  
Gastric Diseases ◽  
Dental Tissue ◽  
Posterior Teeth ◽  
Minimally Invasive Dentistry ◽  
Occlusal Wear ◽  
Fatigue And Fracture ◽  
Cad Cam

Review question / Objective: The aim of this systematic review is to synthesize the scientific evidence that evaluates fatigue and fracture resistance, survival, and stress distribution, of composite resin CAD/CAM and ceramic CAD/CAM occlusal veneers in posterior teeth with severe occlusal wear. Condition being studied: Currently there is an increase in cases of dental wear, due to several factors such as: excessive consumption of carbonated drinks, a diet high in acids, gastric diseases, anorexia, bulimia, dental grinding, use of highly abrasive toothpastes, or a combination of these(9) (10) (11) (12); which affect the patient in several aspects: loss of vertical dimension, sensitivity due to the exposure of dentin, esthetics, affectation of the neuromuscular system(11) (13) (14). With the advent of minimally invasive dentistry, occlusal veneers have been found to be a valid option to rehabilitate this type of cases and thus avoid greater wear of the dental structure with full coverage restorations. Sometimes when performing a tabletop it is not necessary to perform any preparation, thus preserving the maximum amount of dental tissue(3) (6) (15). Due to the masticatory load either in patients without parafunction where the maximum masticatory force is approximately 424 N for women and 630 N for men or in those who present parafunction where the maximum bite force can vary from 780 to 1120N(7), it is necessary that the occlusal veneers support that load which makes indispensable a compilation of studies investigating both fatigue and fracture resistance and the survival rate of occlusal veneers in different materials and thicknesses.

scholarly journals Fracture Resistance of Partial Indirect Restorations Made With CAD/CAM Technology. A Systematic Review and Meta-analysis

2019 ◽  
Vol 8 (11) ◽  
pp. 1932 ◽  
Author(s):  
Amesti-Garaizabal ◽  
Agustín-Panadero ◽  
Verdejo-Solá ◽  
Fons-Font ◽  
Fernández-Estevan ◽  
...  
Keyword(s):  
Systematic Review ◽  
Computer Aided Design ◽  
Fracture Resistance ◽  
Composite Resin ◽  
Meta Analysis ◽  
Computer Aided ◽  
Cad Cam ◽  
Proximal Box Elevation ◽  
Hybrid Ceramic

Background: The aim of this systematic review and meta-analysis was to determine the fracture resistance and survival rate of partial indirect restorations inlays, onlays, and overlays fabricated using computer-aided design and computer-aided manufacturing (CAD-CAM) technology from ceramics, composite resin, resin nanoceramic, or hybrid ceramic and to analyze the influence of proximal box elevation on fracture resistance. Materials and methods: This systematic review was based on guidelines proposed by the preferred reporting items for systematic reviews and meta-analyses (PRISMA). An electronic search was conducted in databases US National Library of Medicine National Institutes of Health (PubMed), Scopus, Web of Science (WOS), and Embase. In vitro trials published during the last 10 years were included in the review. Results: Applying inclusion criteria based on the review’s population, intervention, comparison, outcome (PICO) question, 13 articles were selected. Meta-analysis by restoration type estimated the fracture resistance of inlays to be 1923.45 Newtons (N); of onlays 1644 N and of overlays 1383.6 N. Meta-analysis by restoration material obtained an estimated fracture resistance for ceramic of 1529.5 N, for composite resin of 1600 Ne, for resin nanoceramic 2478.7 N, and hybrid ceramic 2108 N. Conclusions: Resin nanoceramic inlays present significantly higher fracture resistance values. Proximal box elevation does not exert any influence on the fracture resistance of indirect restorations.

scholarly journals Design and Simulation of Disposable S Shape Coriolis Mass Flow Sensor using FEA Method

2020 ◽  
Vol 8 (5) ◽  
pp. 2132-2137
Keyword(s):  
Modal Analysis ◽  
Natural Frequency ◽  
Mass Flow ◽  
Polyvinylidene Fluoride ◽  
Flow Sensor ◽  
Working Fluid ◽  
Polyether Ether Ketone ◽  
Ether Ketone ◽  
Materials Used ◽  
Mass Flow Sensor

The aim of this paper is to design and evaluate natural frequency of disposable S shape coriolis mass flow sensor (CMFS). Three disposable materials used for performing modal analysis are PVDF (polyvinylidene fluoride), PP (polypropylene) and PEEK(polyether ether ketone). The design of coriolis mass flow sensor (CMFS) is done in CATIA V5 and simulation is performed in ANSYS 16.2. Simulation is performed by considering fluid inside the tube. Water is used as working fluid.

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