AI Article Synopsis
- The study aimed to assess how different surface treatments affect the topography of porcelain used in metal ceramic prostheses.
- Six different treatment groups were compared, including a control group, etching with hydrofluoric acid, grinding followed by etching, and various Nd: YAG laser treatments combined with etching.
- Results showed that the combination of a 1.05 W laser and hydrofluoric acid created a significantly coarse surface with distinct cracks and pits, indicating this method is effective for altering porcelain surfaces.
Article Abstract
Objective: To evaluate the influence of different surface treatments on porcelain surface topography.
Methods: Metal ceramic prostheses in 6 groups were treated according to the different surface treatment methods, and the surface topography was observed through scanning electron microscope (SEM). Group A was the control one (untreated), group B was etched by 9.6% hydrofluoric acid(HF), group C was deglazed by grinding and then etched by 9.6% HF, group D was treated with Nd: YAG laser irradiation(0.75 W) and HF etching, group E was treated with Nd: YAG laser irradiation (1.05 W) and HF etching, and group F was treated with laser irradiation (1.45 W) and HF etching.
Results: Surface topography was different in different groups. A lot of inerratic cracks with the shapes of rhombuses and grid, and crater with a shape of circle were observed on the ceramic surface after treatment with energy parameters of 1.05 W Nd: YAG laser irradiation and 9.6% HF etching (group E). Surface topography showed a lot of concaves on the inner wall of the cracks, and the concaves with diameter of 1-5 microm could be observed on the inner wall of the holes, which had a diameter of 20 microm under SEM.
Conclusion: The use of Nd: YAG laser irradiation with the energy parameters of 1.05 W and the HF with a concentration of 9.6% can evenly coarsen the porcelain surface, that is an effective surface treatment method.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Treatment of café-au-lait macules with picosecond and nanosecond 1064-nm nd: YAG laser: a retrospective study.
Lasers Med Sci
January 2025
Hospital for Skin Diseases, Shandong First Medical University, Jinan, China.
To investigate the efficacy and safety of picosecond (PS) and nanosecond (NS) 1064-nm neodymium-doped yttrium aluminum garnet (Nd: YAG) laser in treating Café-au-lait macules (CALMs). We retrospectively analyzed the medical records of patients with CALMs, who were treated with PS or NS 1064-nm lasers from January 2020 to January 2022. The efficacy was determined based on the before and after pictures by two independent investigators.
View Article and Find Full Text PDFEjaculation-sparing enucleation of the prostate with Thulium: Yag laser (ES-ThuLEP) versus Thulium Fiber laser (ES-ThuFLEP): outcomes on sexual function.
World J Urol
January 2025
Department of Urology, Azienda Socio Sanitaria Territoriale Lariana, Como, Italy.
Purpose: To compare the effect on sexual function of ejaculation-sparing enucleation of the prostate using Thulium: YAG laser (ES-ThuLEP) versus continuous-wave Thulium Fiber Laser (ES-ThuFLEP).
Methods: 112 patients with lower urinary tract symptoms secondary to benign prostatic hyperplasia who wished to preserve ejaculation were treated. 58 patients underwent ES-ThuLEP (Group A) using the Cyber TM generator.
In this paper, we demonstrate a high-contrast front-end laser system based on Yb: YAG solid-state laser for Ti: sapphire terminal amplification. An ultrafast Yb: YAG solid-state laser is used to generate a broad-spectrum seed through white light generation (WLG), and then the signal light near 1600 nm is amplified by three-level colinear optical parametric chirped pulse amplification (OPCPA). Finally, a fs second harmonic generation (SHG) is used to obtain a laser output with a central wavelength of 795 nm, a pulse width of 40.
View Article and Find Full Text PDFWe demonstrate the generation of high-order, high-power vortex modes from a Hermite-Gaussian (HG) Yb:YAG thin-disk oscillator, with tunable mode orders ranging continuously from one to ten. To the best of our knowledge, this is the highest order of HG and vortex modes obtained using a thin-disk module. The output power for most of these modes reaches up to 10 W, setting a new benchmark for intracavity high-order HG mode generation.
View Article and Find Full Text PDFA transversely isotropic diode-pumped solid-state laser is used to obtain an orthogonally dual-polarization nonplanar circular mode (NCM) under off-axis pumping in the strictly degenerate cavity. Each polarized component of the NCM outside the cavity is revealed to be individually localized on the ray orbits forming a nonplanar surface, in which the transverse patterns display multiple spots well positioned on a circular structure. An analytical representation is established to explore polarization-resolved components of the NCM by utilizing the Gaussian wave packet to directly correlate with geometrical rays.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!