scholarly journals CAD/CAM Resin-Based Composites for Use in Long-Term Temporary Fixed Dental Prostheses

Polymers ◽  
2021 ◽  
Vol 13 (20) ◽  
pp. 3469
Author(s):  
Franziska Hensel ◽  
Andreas Koenig ◽  
Hans-Martin Doerfler ◽  
Florian Fuchs ◽  
Martin Rosentritt ◽  
...  
Keyword(s):  
In Vitro Study ◽  
Chewing Simulation ◽  
Long Term Stability ◽  
Dental Prostheses ◽  
Alternative Materials ◽  
Cad Cam ◽  
Fixed Dental Prostheses ◽  
Additional Image

The aim of this in vitro study was to analyse the performance of CAD/CAM resin-based composites for the fabrication of long-term temporary fixed dental prostheses (FDP) and to compare it to other commercially available alternative materials regarding its long-term stability. Four CAD/CAM materials [Structur CAD (SC), VITA CAD-Temp (CT), Grandio disc (GD), and Lava Esthetic (LE)] and two direct RBCs [(Structur 3 (S3) and LuxaCrown (LC)] were used to fabricate three-unit FDPs. 10/20 FDPs were subjected to thermal cycling and mechanical loading by chewing simulation and 10/20 FDPs were stored in distilled water. Two FDPs of each material were forwarded to additional image diagnostics prior and after chewing simulation. Fracture loads were measured and data were statistically analysed. SC is suitable for use as a long-term temporary (two years) three-unit FDP. In comparison to CT, SC featured significantly higher breaking forces (SC > 800 N; CT < 600 N) and the surface wear of the antagonists was (significantly) lower and the abrasion of the FDP was similar. The high breaking forces (1100–1327 N) of GD and the small difference compared to LE regarding flexural strength showed that the material might be used for the fabrication of three-unit FDPs. With the exception of S3, all analysed direct or indirect materials are suitable for the fabrication of temporary FDPs.

scholarly journals Fracture Resistance of CAD/CAM Versus Traditional Interim Fixed Dental Prostheses

2018 ◽  
Vol 55 (3) ◽  
pp. 361-363
Author(s):  
Daniel Alexandru Pop ◽  
R. Malaescu ◽  
Liviu Marsavina ◽  
Tiberiu Hosszu ◽  
Raul Rotar ◽  
...  
Keyword(s):  
Testing Machine ◽  
In Vitro Study ◽  
Maximum Load ◽  
Fracture Load ◽  
Digital Design ◽  
Computer Assisted ◽  
Dental Prostheses ◽  
Cad Cam ◽  
Fixed Dental Prostheses

The aim of this in vitro study is to compare the load-to-fracture performance of polymethyl methacrylates (PMMA) provisional restorations manufactured with a traditional laboratory technique in comparison to a computer-assisted design and computer-assisted manufacturing (CAD-CAM) technique. Five interim three-unit fixed dental prostheses were fabricated with the conventional indirect technique, on a standard typodont. The same model was scanned with an intraoral scanner and the digital design of identical fixed dental prostheses was made. Then other five interim three-unit fixed dental prostheses were milled from PMMA CAD/CAM blocks with an in office milling machine. All specimens were tested for flexural strength in a universal testing machine, and the maximum load to fracture was measured. For the conventional provisional restorations, the load to fracture was 121.16 � 24.6, in comparison to CAD/CAM interim restorations, for which the load to fracture was 728.88 � 228.7. Within the limitations of this study, one can conclude that CAD/CAM provisional restorations present a higher fracture load than the conventional manufactured interim restorations.

Effects of Polishing versus Glazing on Dental Ceramic Wear: A Comparative In Vitro Study

2021 ◽  
Vol 11 (1) ◽  
pp. 73-79
Author(s):  
Mohammed Abujalala ◽  
A. Nehir Özden
Keyword(s):  
Wear Behavior ◽  
In Vitro Study ◽  
Ceramic Materials ◽  
Volume Loss ◽  
Dental Ceramic ◽  
Chewing Simulation ◽  
System A ◽  
Before And After ◽  
Cad Cam

This study analyzed the wear behavior caused by steatite antagonists to four dental ceramic materials, comparing this between two surface treatments: polishing and glazing. Methods: Thirty flat samples (10 × 8 × 2 mm) were prepared from each of four ceramics: IPS e. max CAD (IPS), GC Initial LiSi Press (LP), Vita Enamic (VE), and monolithic zirconia (MZ). Subgroups of samples were finished by polishing or glazing or neither (as controls). The samples were subjected to computer-controlled chewing simulation (240,000 cycles of 49 N at 1.6 Hz, with thermocycling at 5/55 C), with steatite balls as antagonists. The samples and antagonists were visualized before and after the test with a laser abrasion measurement system, a CAD/CAM scanner, and electron microscopy scanning, and the volumes lost from the tested samples and antagonists were analyzed. Results: For the MZ samples, the polished samples showed significantly less volume loss than the glazed samples (0.0200 mm3 vs. 0.0305 mm3; p =0.0001), whereas there was significantly greater antagonist volume loss (0.0365 mm3 vs. 0.0240 mm3; p = 0.011). There were no significant differences between the subgroups for IPS, VE, and LP, although antagonist volume losses were non-significantly greater with the glazed samples than with the polished samples. Conclusions: Polishing MZ had adverse effects on the corresponding antagonist wear. Glazed MZ showed the lowest antagonist wear.

First clinical experiences with CAD/CAM-fabricated PMMA-based fixed dental prostheses as long-term temporaries

2015 ◽  
Vol 20 (1) ◽  
pp. 161-168 ◽  
Author(s):  
Fabian Huettig ◽  
Andreas Prutscher ◽  
Christoph Goldammer ◽  
Curt A. Kreutzer ◽  
Heiner Weber
Keyword(s):  
Clinical Experiences ◽  
Dental Prostheses ◽  
Cad Cam ◽  
Fixed Dental Prostheses

scholarly journals Does Printing Orientation Matter? In-Vitro Fracture Strength of Temporary Fixed Dental Prostheses after a 1-Year Simulation in the Artificial Mouth

Materials ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 259
Author(s):  
Julian Nold ◽  
Christian Wesemann ◽  
Laura Rieg ◽  
Lara Binder ◽  
Siegbert Witkowski ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Fracture Strength ◽  
Computer Aided Design ◽  
In Vitro Study ◽  
Bending Test ◽  
Dental Prostheses ◽  
Computer Aided ◽  
Subtractive Manufacturing ◽  
Fixed Dental Prostheses

Computer-aided design and computer-aided manufacturing (CAD–CAM) enable subtractive or additive fabrication of temporary fixed dental prostheses (FDPs). The present in-vitro study aimed to compare the fracture resistance of both milled and additive manufactured three-unit FDPs and bar-shaped, ISO-conform specimens. Polymethylmethacrylate was used for subtractive manufacturing and a light-curing resin for additive manufacturing. Three (bars) and four (FDPs) different printing orientations were evaluated. All bars (n = 32) were subjected to a three-point bending test after 24 h of water storage. Half of the 80 FDPs were dynamically loaded (250,000 cycles, 98 N) with simultaneous hydrothermal cycling. Non-aged (n = 40) and surviving FDPs (n = 11) were subjected to static loading until fracture. Regarding the bar-shaped specimens, the milled group showed the highest flexural strength (114 ± 10 MPa, p = 0.001), followed by the vertically printed group (97 ± 10 MPa, p < 0.007). Subtractive manufactured FDPs revealed the highest fracture strength (1060 ± 89 N) with all specimens surviving dynamic loading. During artificial aging, 29 of 32 printed specimens failed. The present findings indicate that both printing orientation and aging affect the strength of additive manufactured specimens. The used resin and settings cannot be recommended for additive manufacturing of long-term temporary three-unit FDPs.

scholarly journals Clinical Performance of CAD/CAM All-Ceramic Tooth-Supported Fixed Dental Prostheses: A Systematic Review and Meta-Analysis

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2672
Author(s):  
Babak Saravi ◽  
Andreas Vollmer ◽  
Maja Hartmann ◽  
Gernot Lang ◽  
Ralf-Joachim Kohal ◽  
...  
Keyword(s):  
Systematic Review ◽  
Prospective Studies ◽  
Clinical Performance ◽  
Meta Analysis ◽  
Risk Of Bias ◽  
Success Rates ◽  
Dental Prostheses ◽  
Cad Cam ◽  
Fixed Dental Prostheses

Although CAD/CAM ceramics present a promising alternative to metal-ceramic fixed dental prostheses, little is known about their mid- and long-term clinical performance. This systematic review aims to estimate the survival and success rates and describes the underlying complication characteristics for CAD/CAM tooth-supported zirconia- and lithium disilicate-based fixed dental prostheses (FDPs). We systematically searched MEDLINE and Web of Science to find relevant prospective studies with a follow-up of at least one year. We estimated pooled 1-, 5-, and 10-year survival and success rates by combining the collected data in a Poisson regression model. Descriptive statistics were conducted to evaluate the distribution of failures and complications in the included studies. Risk of bias for the included studies was assessed with an adapted checklist for single-arm trials. Pooled estimated 1-, 5-, and 10-year survival rates ranged from 93.80% to 94.66%, 89.67% to 91.1%, and 79.33% to 82.20%, respectively. The corresponding success rates excluding failures, but including any other types of intervention were 94.53% to 96.77%, 90.89% to 94.62%, and 81.78% to 89.25%. Secondary caries was the most frequent cause of failure, followed by chipping of the veneering. The most common cause of complication excluding failures but requiring intervention was chipping of the veneering. Risk of bias was generally acceptable for the included studies, with seven studies associated with low risk of bias, eight studies with a moderate risk of bias, and three studies with serious risk of bias. The current meta-analysis on CAD/CAM-supported FDPs revealed satisfying survival and success rates for up to 10 years of exposure. More prospective studies focusing on long-term performance are needed to strengthen the evidence currently available in the literature.

scholarly journals Development of a pH-sensitive functionalized metal organic framework: in vitro study for simultaneous delivery of doxorubicin and cyclophosphamide in breast cancer

RSC Advances ◽  
2021 ◽  
Vol 11 (53) ◽  
pp. 33723-33733
Author(s):  
Ragini Singh ◽  
Binayak Kumar ◽  
Ram Krishna Sahu ◽  
Soni Kumari ◽  
Chandan Bhogendra Jha ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Drug Loading ◽  
In Vitro Study ◽  
Long Term Stability ◽  
Specific Targeting ◽  
Metal Organic ◽  
High Drug Loading ◽  
Dual Drug

Exploration of an efficient dual-drug based nanocarrier with high drug loading capacity, specific targeting properties, and long-term stability is highly desirable in cancer therapy.

Evaluation of Two Protocols to Measure the Accuracy of Fixed Dental Prostheses: An In Vitro Study

2017 ◽  
Vol 28 (2) ◽  
pp. e599-e603 ◽  
Author(s):  
Joana Schönberger ◽  
Kurt-Jürgen Erdelt ◽  
Daniel Bäumer ◽  
Florian Beuer
Keyword(s):  
In Vitro Study ◽  
Vitro Study ◽  
Dental Prostheses ◽  
Fixed Dental Prostheses
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