Aims: To evaluate the effect of chemical disinfectant on the transverse strength of heat-polymerized acrylic resins subjected to mechanical and chemical polishing.
Materials And Methods: A total of 256 rectangular specimens (65 * 10 * 3 mm) 128 per resin (Lucitone-199 and Acralyn-H) were fabricated. One side of each specimen was not polished and the other was either mechanically (n = 96) or chemically (n = 96) polished and immersed for 10, 30 and 60 minutes in 2% alkaline glutaraldehyde. Mechanically polished (n = 32) and chemically polished (n = 32) control specimens were immersed only in distilled water. The transverse strength (N/mm(2)) was tested for failure in a universal testing machine, at a crosshead speed of 5 mm/min. Data were statistically analyzed using 2-way ANOVA and Student t-test.
Results: chemical polishing resulted in significantly lower transverse strength values than mechanical polishing. Lucitone- 199 resin demonstrated the highest overall transverse strength for the materials tested. Heat-polymerized acrylic resins either mechanically or chemically polished, did not demonstrate significant changes in transverse strength during immersion in the disinfecting solution tested, regardless of time of immersion.
Conclusion: Lucitone-199 resin demonstrated the highest overall transverse strength for the materials tested and significantly stronger than Acralyn-H with either type of polishing following immersion in 2% alkaline glutaraldehyde.
Clinical Significance: There is a concern that immersion in chemical solutions often used for cleansing and disinfection of prostheses may undermine the strength and structure of denture base resins. In this study it was observed that, the transverse strength of samples of Lucitone-199 was higher than that of the samples of Acralyn-H. The chances of fracture of the denture made of Lucitone-199 are less than that of dentures made of Acralyn-H. The chemically polished dentures may be more prone to fracture than mechanically polished dentures.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.5005/jp-journals-10024-1156 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Strength and size relationships of toe flexor muscles in three different functional force production tasks.
Acta Bioeng Biomech
September 2024
Institute of Advanced Research for Sport and Health Science, Ritsumeikan University, Japan.
: Toe flexor strength (TFS) has been determined to evaluate the toe flexor muscle function. However, it is unclear how strength and size relationships of toe flexor muscles vary depending on the toes intended for force production. We aimed to clarify this by examining the relationship between TFS and toe flexor muscle size, and hypothesized TFS produced by all toes (TFS-All), the great toe (TFS-Great) and lesser toes (TFS-Lesser) would be specifically associated with the size of the muscles specialized in each corresponding toe flexion.
View Article and Find Full Text PDFThe effect of dynamic neuromuscular stabilization technique combined with Kinesio Taping on neuromuscular function and pain self-efficacy in individuals with chronic nonspecific low back pain: A randomized trial.
Medicine (Baltimore)
January 2025
Second Hospital of the Air Force Medical University, Xi 'an, China.
Background: This study investigates the therapeutic efficacy of dynamic neuromuscular stabilization (DNS) technology paired with Kinesio Taping in patients with persistent nonspecific low back pain, as well as the effect on neuromuscular function and pain self-efficacy.
Methods: A randomized controlled clinical study was conducted to collect clinical data on DNS combined with KT for the treatment of chronic nonspecific low back pain from November 2023 to April 2024. The inclusion criteria were patients with chronic nonspecific lower back pain, aged between 18 and 30 years old, and without serious underlying medical conditions, such as cardiac disease, hypertension, and diabetes.
Parametric Design and Mechanical Characterization of a Selective Laser Sintering Additively Manufactured Biomimetic Ribbed Dome Inspired by the Chorion of Lepidopteran Eggs.
Biomimetics (Basel)
December 2024
Digital Manufacturing and Materials Characterization Laboratory, School of Science and Technology, International Hellenic University, 57001 Thermi, Greece.
The current research aims to analyze the shape and structural features of the eggs of the lepidoptera species sp. (Lepidoptera, Nympalidae) and develop design solutions through the implementation of a novel strategy of biomimetic design. Scanning electron microscopy (SEM) analysis of the chorion reveals a medial zone that forms an arachnoid grid resembling a ribbed dome with convex longitudinal ribs and concave transverse ring members.
View Article and Find Full Text PDFUltrasound-guided release of carpal tunnel syndrome - anterograde technique.
Hand Surg Rehabil
January 2025
Unidade do Punho e Mão, Hospital Cuf Tejo, Lisboa, Portugal; Centre Hospitalier Régional Universitaire de Nîmes, Department of Orthopaedic Surgery, Nîmes, France; Orthopaedic Group Ormeau Pyrénées, Polyclinique de L'Ormeau - ELSAN, Tarbes, France.
Compression of the median nerve in the carpal tunnel is a frequent pathology with severe functional impact. An ultrasound-guided technique was developed to preserve structures, diminish scar fibrosis and enable fast return to full activity. Its advantages are safety and low additional cost.
View Article and Find Full Text PDFAcute eculizumab treatment in a pediatric patient with AQP4-IgG+ NMOSD.
Mult Scler
January 2025
NYU Langone Medical Center, New York, NY, USA.
Background: Neuromyelitis optica spectrum disorder (NMOSD) is a rare autoimmune disorder that occurs in children and adults.
Case: We report a case of a 10-year-old female with AQP4+ NMOSD who presented with paraparesis from longitudinally extensive transverse myelitis (LETM) from C2 to the conus medullaris. The patient showed gradual improvement in strength and sensation with solumedrol and plasma exchange therapy.
Want 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!