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While lasers have found their successful applications in various clinical specialties, in clinical dental practice, traditional mechanical drills are still predominantly utilized. Although erbium-doped lasers have been demonstrated for dental therapy, their clinical performance is still not satisfactory due to the long pulse width, low peak power, and small repetition rate. To attain a smaller thermal diffusion thus better biological safety and surgical precision, as well as more rapid ablation, the advancement of femtosecond laser techniques has opened another route of dental surgery; however, no biological safety investigation has been reported.
View Article and Find Full Text PDFExperimental Investigation of Water Jet-Guided Laser Micro-Hole Drilling of C/SiC Composites.
Materials (Basel)
April 2024
Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China.
In this paper, water jet-guided laser (WJGL) drilling of Cf/SiC composites was employed and the effects of the processing parameters on the depth and quality of the micro-holes were systematically investigated. Firstly, the depth measurement showed that the increase in processing time and power density led to a significant improvement in micro-hole drilling depth. However, the enhancement of the water jet speed resulted in a pronounced decrease in the depth due to the phenomenon of water splashing.
View Article and Find Full Text PDFTwo-stage extraction by partial grinding of impacted mandibular third molar in close proximity to the inferior alveolar nerve.
World J Clin Cases
April 2024
Kunbaida Outpatient Department, Kunming Medical University School and Hospital of Stomatology, Kunming 650106, Yunnan Province, China.
Background: Extraction of impacted third molars often leads to severe complications caused by damage to the inferior alveolar nerve (IAN).
Aim: To proposes a method for the partial grinding of an impacted mandibular third molar (IMM3) near the IAN to prevent IAN injury during IMM3 extraction.
Methods: Between January 1996 and March 2022, 25 patients with IMM3 roots near the IAN were enrolled.
Application of an ultrasonic bone knife combined with a dental electric motor in the extraction of mandibular middle and low impacted teeth.
BMC Oral Health
January 2024
School of Stomatology, Jinan University, Guangzhou, 510000, China.
Objective: To investigate the clinical application of an ultrasonic bone knife (UBK) combined with a dental electric motor (DEM) in the extraction of mandibular middle and low impacted teeth.
Methods: From January 2022 to May 2023,200 patients with wisdom teeth were randomly divided into three groups: experimental group A (UBK combined with DEM), experimental group B (UBK combined with high-speed turbine mobile phone (HSTMP)), and the control group (bone chisel split crown (BCSC)). The operation time, psychological state during operation, pain, swelling, limitation of mouth opening and other complications on the first, second and third days after operation were recorded.
Quantifying the Effects of Energy Infrastructure on Bird Populations and Biodiversity.
Environ Sci Technol
January 2024
Postdoctoral Scholar, Institute of Economics and Econometrics, University of Geneva, 40 Boulevard du Pont-d'Arve, Geneva 1211, Switzerland.
Shale oil and gas production and wind energy generation both expanded rapidly across the United States between 2000 and 2020, raising concerns over impacts on wildlife. I combine longitudinal microdata from the National Audubon Society's Christmas Bird Count with geolocated registries of all wind turbines and shale wells constructed in the contiguous U.S.
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