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This study was designed to evaluate laser-sintered early-loaded 1-piece implants (OPI) based on clinical and radiographic findings. Thirty OPI were placed in the mandibular premolar area and subjected to early loading after 3 week...
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This study was designed to evaluate laser-sintered early-loaded 1-piece implants (OPI) based on clinical and radiographic findings. Thirty OPI were placed in the mandibular premolar area and subjected to early loading after 3 weeks of initial placement; patients were followed up for 6 months. Clinical evaluation included pocket depth, gingival health, implant stability, and esthetics. Periapical radiographs were used to measure the marginal bone loss (MBL). All implants were considered successful resulting in a survival rate of 100%. A remarkable difference (P < 0.01) existed when comparing MBL levels at 1 month with those at 3 and 6 months. Significant differences (P < 0.01) existed when comparing implant stability at 1 month to 3 months and at 3 months to 6 months. Moreover, significant differences (P < 0.01) were observed when comparing pen-implant probing depth at 1 month to that at 3 and 6 months on both the mesial and distal sides. The mean value of pink esthetic score was 11 at time of final restoration. The laser-treated early-loaded OPI design is associated with satisfactory clinical and radiographic follow-up results and it is a good alternative to the 2-piece design.
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Background There is societal concern regarding potential health problems associated with breast implants. Much of this distrust climate was a reaction to the Poly Implant Prosthesis (PIP) scandal. Studying the mechanisms of implan...
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Background There is societal concern regarding potential health problems associated with breast implants. Much of this distrust climate was a reaction to the Poly Implant Prosthesis (PIP) scandal. Studying the mechanisms of implant rupture is an important step for their improvement. The mechanical behaviour of breast implant shells was studied on explanted and virgin implants. Implants from both PIP and another brand (brand X), currently in the market, were considered.
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Objectives: To evaluate the two-year survival rate (SR) and marginal bone loss (MBL) of fixed dental prostheses (FDPs) supported by straight (S) and tilted (T) implants under the influence of diverse study variables.
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The identification of metal ions and particles in the vicinity of failed implants has raised the concern that biomedical titanium alloys undergo corrosion in healthy and infected tissues. Various surface modifications and coatings...
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The identification of metal ions and particles in the vicinity of failed implants has raised the concern that biomedical titanium alloys undergo corrosion in healthy and infected tissues. Various surface modifications and coatings have been investigated to prevent the deterioration and biocorrosion of titanium alloys but so far with limited success. Graphene is a cytocompatible atom-thick film made of carbon atoms. It has a very high surface area and can be deposited onto metal objects with complex shapes. As the carbon lattice has a very small pore size, graphene has promising impermeability capacity. Here, we show that graphene coating can effectively protect Ti-6Al-4V from corrosion. Graphene nanocoatings were produced on Ti-6Al-4V grade 5 and 23 discs and subjected to corrosive challenge (0.5M NaCl supplemented with 2-ppm fluoride, pH of 2.0) up to 30 d. The linear polarization resistance curves and electrochemical impedance spectroscopy analysis showed that the graphene-coated samples presented higher corrosion resistance and electrochemical stability at all time points. Moreover, the corrosion rate of the graphene-coated samples was very low and stable (0.001 mm/y), whereas that of the uncoated controls increased up to 16 and 5 times for grade 5 and 23 (0.091 mm/y) at the end point, respectively. The surface oxidation, degradation (e.g., crevice defects), and leaching of Ti, Al, and V ions observed in the uncoated controls were prevented by the graphene nanocoating. The Raman mappings confirmed that the graphene nanocoating presented high structural stability and resistance to mechanical stresses and chemical degradation, keeping >99% of coverage after corrosion challenge. Our findings open the avenues for the use of graphene as anticorrosion coatings for metal biomedical alloys and implantable devices.
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Objectives To evaluate prospectively the clinical and radiographic outcomes after ten years of short (6 mm) implants with a moderately rough surface supporting single crowns in the posterior region. Material and Methods Forty 6 mm...
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Objectives To evaluate prospectively the clinical and radiographic outcomes after ten years of short (6 mm) implants with a moderately rough surface supporting single crowns in the posterior region. Material and Methods Forty 6 mm modified sandblasted large-grit acid-etched (mod-SLA), soft tissue level implants were installed in the distal segments of 35 consecutive patients. After 6 weeks of healing, abutments were tightened, and single porcelain-fused-to-metal crowns were cemented. Implant survival, marginal bone loss, and clinical crown/implant ratio were evaluated at various time intervals up to 10 years after loading. Results Two out of the 40 implants were lost before loading, one implant was lost after 7 years because of peri-implantitis. One patient with two implants died and was excluded from analysis. Two patients did not come at the 10-year follow-up and were considered as drop out (2 implants). The survival rate was 91.7% (n = 36). Thirty-three implants were available for marginal bone loss evaluation. A mean marginal bone loss after 10 years of function was 0.8 +/- 0.7 mm. Between 5 and 10 years, the loss was 0.2 +/- 0.4 mm. No technical complications were registered during the 10-year period. The clinical crown/implant ratio increased with time from 1.6 at the delivery of the prosthesis to 2.0 after 10 years of loading with no increase between 5 and 10 years. Conclusion Short (6 mm) implants with a moderately rough surface supporting single crowns in the posterior region and loaded after 6-7 weeks maintained full function for at least 10 years with low marginal bone resorption.
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Abstract Objective Resonance frequency analysis (RFA) provides an evaluation of implant stability over time. This analysis is a non-invasive, precise, and objective method. Several studies compare the RFA system with other devices...
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Abstract Objective Resonance frequency analysis (RFA) provides an evaluation of implant stability over time. This analysis is a non-invasive, precise, and objective method. Several studies compare the RFA system with other devices. However, few investigations analyze repeatability and reproducibility between different operators. The aim of this study was to evaluate the intra- and inter-operator concordance of the Osstell? ISQ.Material and methods RFA measurements were performed with Osstell? ISQ in a total of 37 implants placed in 21 patients. At the time of implant placement, 6 measurements per implant were taken by three different experienced operators. Three measurements were carried out consecutively and three by removing and placing the SmartPeg-Osstell? to assess intra-operator and inter-operator agreement.Results Intra-operator concordance according to the intraclass correlation coefficient (ICC) showed high concordance. The ICC values were higher than 0.9 (p?收起
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? 2023 British Association of Plastic, Reconstructive and Aesthetic SurgeonsIntroduction: Breast augmentation remains one of the most prevalent procedures in plastic surgery. While most patients experience high satisfaction with t...
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? 2023 British Association of Plastic, Reconstructive and Aesthetic SurgeonsIntroduction: Breast augmentation remains one of the most prevalent procedures in plastic surgery. While most patients experience high satisfaction with the outcomes, a subset may encounter various complications or dissatisfaction with achieved results necessitating subsequent surgical intervention including implant removal or exchange. Materials and Methods: We collected information from three pivotal private medical centers in Israel where a considerable number of breast surgeries are performed. We examined the number of breast augmentations, implant exchange and implant removal surgeries with or without breast lift that were performed on a biannual basis for each center for the period 2018-2022. Trends in surgery types were analyzed and compared to registries in other countries. Results: Between the years 2018 and 2022, 20,075 surgeries were done in three main private medical centers in Israel. Data show a gradual increase in implant removal surgeries from 2018 (n = 80, 2.9%) to 2019 (n = 269, 9.9%), followed by a significant increase in 2020 (n = 1436, 27.3%), and a gradual decline between 2021 (n = 1019, 22.8%) and 2022 (n = 916, 18.5%). The overall number of breast implant insertion procedures (breast augmentation procedures and exchange procedures) was 2659 in 2018 (97%), 2424 in 2019 (90.0%), 3816 in 2020 (72.6%), 3437 in 2021 (77.1%), and 4019 in 2022 (81.4%). We present updated trends in breast implant surgeries in Israel. 2020 was a key year in which the rate of explantations was the highest, and the percentage rate of implantations was the lowest and a year in which the trend changed. These patterns partly align with trends seen in other countries worldwide.
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A series of single energy Al,B,and Ga ion implants were performedin the energy range 50 keV to 4MeV into 6H-SiC to characterize theimplant depth profiles using secondary ion mass spectrometry(SIMS).From the implant depth profiles ...
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A series of single energy Al,B,and Ga ion implants were performedin the energy range 50 keV to 4MeV into 6H-SiC to characterize theimplant depth profiles using secondary ion mass spectrometry(SIMS).From the implant depth profiles empirical formulae were developed tomodel the range statistics as functions of ion energy.
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A series of single energy Al,B,and Ga ion implants were performed in the energy range 50 keV to 4MeV into 6H-SiC to characterize the implant depth profiles using secondary ion mass spectrometry(SIMS). From the implant depth profil...
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A series of single energy Al,B,and Ga ion implants were performed in the energy range 50 keV to 4MeV into 6H-SiC to characterize the implant depth profiles using secondary ion mass spectrometry(SIMS). From the implant depth profiles empirical formulae were developed to model the range statistics as functions of ion energy.
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The purpose of this review is to describe commonly used dental implants with reference to their material composition, design factors, and surface topographies. The review includes a discussion of the biological principle of osseoi...
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The purpose of this review is to describe commonly used dental implants with reference to their material composition, design factors, and surface topographies. The review includes a discussion of the biological principle of osseointegration and how this process of bone-implant interaction is influenced by different implant materials, designs, and surface characteristics
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