Purpose: To compare the effect of post-and-core material type and production technique on the fracture resistance of teeth.
Materials And Methods: Sixty human maxillary central incisors were used for the study. Root canal treatments were performed, and the post cavities were created. The teeth were divided into six groups (n = 10) according to post material and production method: prefabricated glass-fiber post (PF), zirconia post (PZ), titanium post (PT), and CAD-CAM produced glass-fiber post (CF), zirconia post (CZ), titanium post (CT). All post-and-core restorations were luted with resin cement (RelyX U200). Static loading was applied on the luted metal copings using a universal testing machine to measure fracture resistance. The effect of material and production method on fracture resistance was evaluated with two-way ANOVA test. Tukey HSD test was used in post hoc analyses. Significance was evaluated at p < 0.05 level.
Results: In the CAD-CAM post-and-cores, the fracture resistance of zirconia was significantly higher (809 N) than titanium (569 N) and glass-fiber (342 N). In the prefabricated posts, the fracture resistance of zirconia was significantly higher than glass-fiber (445 N), while there was no significant difference between zirconia (605 N) and titanium (538 N) materials.
Conclusion: Zirconia posts demonstrated the highest and CAD-CAM glass-fiber posts demonstrated the lowest fracture resistance compared to other types of post materials. Additional studies are needed to confirm if CAD-CAM glass-fiber posts may be considered an effective alternative treatment.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1111/jopr.14023 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Toughening of thermoset composites using glass/polypropylene commingled stitching yarns.
Heliyon
January 2025
Portsmouth Centre for Advanced Materials and Manufacturing (PCAMM), School of Electrical and Mechanical Engineering, University of Portsmouth, Portsmouth, PO1 3DJ, UK.
This paper investigates the damage resistance and tolerance of thermoset composite laminates stitched by glass and hybrid glass/polypropylene commingled yarns. Different impact energies (10-70 J) were applied to stitched composite laminates before compression after impact (CAI) tests were conducted. The results showed that, except for 70J, commingled yarn-stitched laminates absorbed more energy than glass-stitched laminates.
View Article and Find Full Text PDFFracture resistance of endodontically treated teeth restored with CAD-CAM milled and prefabricated post-and-core systems.
J Prosthodont
January 2025
Department of Prosthodontics, Yeditepe University Faculty of Dentistry, Istanbul, Turkey.
Purpose: To compare the effect of post-and-core material type and production technique on the fracture resistance of teeth.
Materials And Methods: Sixty human maxillary central incisors were used for the study. Root canal treatments were performed, and the post cavities were created.
Lung transplantation and bone health: A narrative review.
J Heart Lung Transplant
January 2025
Department of Medicine, University Health Network and Sinai Health System, University of Toronto, Toronto, ON, Canada; Toronto General Hospital Research Institute, University Health Network, Toronto, ON, Canada; Joint Department of Medical Imaging, University of Toronto, Toronto, ON, Canada. Electronic address:
Bone health after lung transplantation has not been comprehensively reviewed in over two decades. This narrative review summarizes available literature on bone health in the context of lung transplantation, including epidemiology, presentation and post-operative management. Osteoporosis is reported in approximately 30-50% of lung transplant candidates, largely due to disease-related impact on bone and lifestyle, and corticosteroid-related effects during end-stage lung disease (interstitial lung diseases, chronic obstructive pulmonary disease, and historically cystic fibrosis).
View Article and Find Full Text PDFChallenges in Adolescent and Adult Males With Classic Congenital Adrenal Hyperplasia Due to 21-Hydroxylase Deficiency.
J Clin Endocrinol Metab
January 2025
Department of Molecular Medicine and Surgery, Karolinska Institutet, 171 76 Stockholm, Sweden.
Classic congenital adrenal hyperplasia (CAH) due to 21-hydroxylase deficiency results in severe cortisol and aldosterone deficiency, leading to persistent adrenal stimulation and excess production of ACTH and adrenal androgens. This review examines the clinical considerations and challenges of balancing under- and overtreatment with glucocorticoids in adolescent and adult male individuals with CAH. Adolescents face many unique challenges that can hinder adherence, hormonal control, and transition to independence.
View Article and Find Full Text PDFUV responded polyvinyl alcohol bio-active films containing oregano essential oil microcapsules by chitosan-incorporated TiO: Physical properties, release characterizations, bio-functional performances and applications.
Int J Biol Macromol
January 2025
College of Food Engineering, Anhui Science and Technology University, Chuzhou, 233100, PR China.
In the present study, with oregano essential oil (OEO) as the active ingredient and polyvinyl alcohol/citric acid (PVA/CA) as the composite matrix, ultraviolet (UV) responded PVA bio-active films incorporated with microcapsules, which were established by chitosan-incorporated titanium dioxide (TiO), were constructed. The UV light-triggered process changed the structure of films, including the degradation of PVA, the fracture of ester bonds and the breaking of glycosidic bonds. UV irradiation reduced the elongation at break, increased the light resistance ability, the surface hydrophobicity and the roughness, and accelerated the release of OEO in films.
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!