Analyzing the chemical composition of different kinds of acrylic cement is necessary to understand their properties and suitability for curing bone defects. Conducting various chemical tests can give valuable insight into the composition, viscosity, and performance characteristics of each kind of cement, Therefore, our study aimed to find safety standards and the effectiveness of these products for medical applications. The polymeric characterization was determined by Nuclear Magnetic Resonance (H-NMR) spectroscopy and Fourier-transform infrared spectroscopy (FTIR). Additionally, gel permeation chromatography (GPC) was used to determine the molecular weight of poly methyl methacrylate (PMMA), which was between 4000 and 6000 Mw. The presence of methyl methacrylate (MMA) monomer observed in all cement within two minutes was determined using gas chromatography-mass spectrometry (GC-MS). Moreover, the images of all radiopaque compounds in the cement were evaluated using Field emission scanning electron microscopy (FESEM) and Energy Dispersive X-ray (EDAX-MAP). The study determined the glass transition (Tg) temperature and conducted differential scanning calorimetry (DCS) analysis for each type of cement. In addition, the setting time for various kinds of spinal cord cement was measured to be more than ten minutes. The percentage of benzoyl peroxide in each cement was determined using titration, ranging from 0.6% to 6%. Additionally, cytotoxicity studies were conducted on human osteoblasts (MG63) in cell culture. In this study, we tried to make a trend line for evaluation types of bone cement that would be applicable for both regulatory buddies and researchers in this field.
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http://dx.doi.org/10.1080/09205063.2024.2449304 | DOI Listing |
J Bone Joint Surg Am
January 2025
Leeds Institute of Health Sciences, School of Medicine, University of Leeds, Leeds, West Yorkshire, England.
Background: In this study, we estimated the risk of surgically treated postoperative periprosthetic femoral fractures (POPFFs) associated with femoral implants frequently used for total hip arthroplasty (THA).
Methods: In this cohort study of patients who underwent primary THA in England between January 1, 2004, and December 31, 2020, POPFFs were identified from prospectively collected revision records and national hospital records. POPFF incidence rates, adjusting for potential confounders, were estimated for common stems.
Lasers Med Sci
January 2025
Department of Preventive and Restorative Dentistry, Discipline of Endodontics, Araçatuba School of Dentistry, São Paulo State University - UNESP, Araçatuba, SP, Brazil.
Investigate the impact of antimicrobial photodynamic therapy (aPDT) using different photosensitizers (PSs) such as indocyanine green (IG), curcumin (CC), and methylene blue (MB), with or without intracanal application of calcium hydroxide (CH), on the push-out bond strength of glass-fiber posts (GFPs) to intraradicular dentin, the chemical composition of the root substrate, and the sealing of the adhesive interface across different thirds of intraradicular dentin. A total of 112 bovine teeth underwent biomechanical preparation and were divided into eight experimental groups (n = 14 each): Negative control with deionized water; positive control with deionized water + CH; IG group with indocyanine green and infrared laser; IG + CH group; CC group with curcumin and blue LED; CC + CH group; MB group with methylene blue and red laser; and MB + CH group. The push-out bond strength was measured using a universal testing machine (n = 8), and scanning electron microscopy characterized the fracture patterns.
View Article and Find Full Text PDFExp Appl Acarol
January 2025
Group for Medical Entomology, Centre of Excellence for Food- and Vector-Borne Zoonoses, Institute for Medical Research, National Institute of Republic of Serbia, University of Belgrade, Belgrade, Serbia.
Tick salivary proteins are crucial for efficient and successful tick feeding. Most of them are still uncharacterized, especially those involved in the formation of tick cement. Tick salivary protein PA107 is a putative cement protein, which is transcribed in salivary glands during the initial phase of tick feeding.
View Article and Find Full Text PDFInt J Legal Med
January 2025
Department of Stomatology, Public Health and Forensic Odontology, Ribeirão Preto School of Dentistry, University of São Paulo, Ribeirão Preto, São Paulo, Brazil.
The age estimation by tooth cementum thickness is a method that has been discussed regarding its applicability. The aim of this study was to conduct a systematic review on the use of tooth cementum thickness as a biomarker for age estimation in adults, as well as a meta-analysis to assess the method's reliability. The search was conducted on Embase, LILACS, PubMed/MEDLINE, SciELO, Scopus, and Web of Science databases.
View Article and Find Full Text PDFJ Contemp Dent Pract
October 2024
Department of Dental Biomaterials, Faculty of Dental Medicine for Girls, Al-Azhar University, Cairo, Egypt, Orcid: https://orcid.org/0000-0002-3420-4146.
Aim: To assess the effect of mushrooms, ozone gas, and their combination as cavity disinfectants on the bonding strength of composite to dentin.
Materials And Methods: The study was conducted on 40 sound premolar teeth randomly divided into four groups. Group I: control group, Group II: mushroom group, Group III: Ozone group, and Group IV: mushroom + ozone gas (combination) group.
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