Objectives: To predict the lifetime and fracture probability of anterior crowns made of a lithium disilicate glass-ceramic (IPS e.max CAD, LD, Ivoclar Vivadent, Liechtenstein) and a zirconia-containing lithium silicate glass-ceramic (Celtra Duo, ZLS, Dentsply Sirona, USA) under cycling loading.
Methods: Three-point bending tests were conducted to measure the viscoelastic parameters. These parameters are used to compute the residual stresses of the anterior crown after crystallization. In the next analysis, the cyclic loading on the anterior crown was calculated. Based on this combined stress state (residual stress and stress state due to external cyclic loading), the life cycle and fracture probability of the anterior crown was calculated using the CARES/Life software. Finally, fatigue experiments were carried out to compare and validate the results of the computations.
Results: Although a sound qualitative comparison of the lifetime of both materials can be done using this methodology, the calculated fracture probability of the anterior crown for both materials was very low in comparison with the fatigue test results using the fatigue parameters determined from the experiments. In order to achieve good correspondence with the experimental results, the SCG exponent n for both materials should be modified by a correlation factor of 0.38.
Significance: Using this modified computational strategy, the results of the time-consuming fatigue tests for dental glass-ceramics can be closely predicted. This methodology can be integrated into the development process of new glass-ceramic materials in order to save time and costs.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.dental.2023.08.173 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Associations between bone material strength index and FRAX scores.
J Bone Miner Metab
January 2025
Deakin University, IMPACT- Institute for Mental and Physical Health and Clinical Translation, School of Medicine, Geelong, Australia.
Introduction: Impact microindentation (IMI) measures bone material strength index (BMSi) in vivo. However, its ability to predict fractures is still uncertain. This study aimed to determine the association between BMSi and 10 year fracture probability, as calculated by the FRAX algorithm.
View Article and Find Full Text PDFIdentifying Risk Factors of Children Who Suffered Physical Abuse: A Systematic Review.
J Am Acad Orthop Surg Glob Res Rev
January 2025
From the Department of Orthopaedic Surgery, Foot and Ankle Research and Innovation Laboratory (FARIL), Massachusetts General Hospital, Harvard Medical School, Boston, MA (Flaherty, Ghandour, Mirochnik, Lucaciu, Nassour, Kwon, and Ashkani-Esfahani); the Department of Orthopaedic Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA (Kwon, Harris, and Ashkani-Esfahani); and the Department of Orthopaedic Surgery, Massachusetts General Hospital, Division Foot and Ankle, Harvard Medical School, Boston, MA (Kwon and Ashkani-Esfahani).
Background: Approximately 25% of children in the United States experience child abuse or neglect, 18% of whom are physically abused. Physicians are often in a position to differentiate accidental trauma from physical child abuse. Therefore, the aim of this study was to review recent literature for risk factors associated with physical child abuse.
View Article and Find Full Text PDFPredictors of Venous Thromboembolism Following Geriatric Distal Femur Fracture Fixation: Are These Patients at Higher Risk Compared With Hip Fracture Patients?
J Am Acad Orthop Surg Glob Res Rev
January 2025
From the Department of Orthopaedics and Rehabilitation, Yale School of Medicine, New Haven, CT.
Introduction: Venous thromboembolism (VTE) following injury and subsequent fixation of a distal femur fracture (DFFx) is associated with considerable morbidity. However, the incidence of VTE, associated factors, and the relative risk compared with hip fracture (HFx) fixation remains poorly characterized.
Methods: Retrospective cohort study using the PearlDiver M165 database to identify geriatric patients who underwent DFFx and HFx fixation.
Evaluation of using grip strength and hand muscle cross-sectional area to predict secondary fractures post distal radius fracture.
Arch Osteoporos
January 2025
Department of Orthopaedics and Traumatology, Queen Mary Hospital The University of Hong Kong, 102 Pok Fu Lam Road, Hong Kong, China.
Unlabelled: Grip strength measurement, as a surrogate of sarcopenia diagnosis, effectively predicts secondary fracture risk in distal radius fracture patients. This simple tool enhances clinical practice by identifying high-risk patients for targeted interventions, potentially preventing or reversing functional decline and recurrent fractures.
Purpose: To evaluate grip strength and hand muscle cross-sectional area as predictors of secondary fracture risk in patients with a history of distal radius fracture (DRF), serving as surrogates of the diagnosis of sarcopenia.
Cost Effectiveness of Fixation Versus Total Hip Arthroplasty in Vancouver B2 Periprosthetic Femur Fractures: A Predictive Markov Analysis.
J Am Acad Orthop Surg
January 2025
From the Department of Orthopaedic Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA (Scott, Blackburn, Prasad, Lim, Lavoie-Gagne, Melnic, and Bedair), and the Department of Orthopaedic Surgery, Newton-Wellesley Hospital, Newton, MA (Scott, Blackburn, Prasad, Lim, Melnic, and Bedair).
Background: Although Vancouver B2 periprosthetic fractures (PPFs) have been historically managed with revision total hip arthroplasty (rTHA), open reduction and internal fixation (ORIF) has been proposed as an alternative option for reasons including lower cost and surgical time. The purpose of this study was to, therefore, create a Markov model to assess the cost effectiveness of ORIF versus rTHA for Vancouver B2 periprosthetic femur fractures and evaluate various inflection points for varying costs and outcome measures.
Methods: A Markov model was built using discrete and mutually exclusive health states of the hypothetical patient with Vancouver B2 PPF.
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!