Zirconia and polyetheretherketone (PEEK) are two biomaterials widely investigated as substitute for metals in oral prosthetic rehabilitation. To achieve a proper biomechanical behavior, the prosthetic biomaterials must ensure a good resistance to loads, as this is a crucial characteristic enabling their use in dental applications. The aim of this study was to investigate differences in the fracture resistance of different biomaterials in an experimental environment: fixed partial dentures (FPDs) screwed in a prototype of biomimetic mandible. 10 Samples of FPDs were allocated in 2 groups (A and B): Group A (n=5) involved FPDs in zirconia-ceramic, and Group B (n=5) involved FPDs in PEEK-composite. The samples were loaded by means of a three-point bending mechanical test, and the load to fracture has been evaluated generating a point-by-point graphics (speed/load and time/deformation). The samples were further analyzed by micro-computed tomography (micro-CT) and described under experimental loading conditions. Zirconia-ceramic FDPs were the samples reporting the worst results, showing a lower value of vertical displacement with respect to PEEK-based samples. The micro-CT results have further confirmed the preliminary results previously described. This study aims to give analytic data on the reliability of PEEK as a reliable and strong biomaterial for prosthetic treatments.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10110469 | PMC |
| http://dx.doi.org/10.7150/ijms.82297 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Development of a Finite Element Model of the Human Wrist Joint with Radial and Ulnar Axial Force Distribution and Radiocarpal Contact Validation.
J Biomech Eng
January 2025
Human-Centric Design Research Lab, Department of Mechanical Engineering, Texas Tech University, Lubbock, TX 79409, USA.
This study presents a comprehensive finite element model for the human wrist, constructed from a CT scan of a 68-year-old male (type I wrist). This model intricately captures the bone and soft tissue geometries to study the biomechanics of wrist axial loading through tendon-driven simulations and grasping biomechanics using metacarpal loads. Validation is carried out by assessing the radial and ulnar axial loading distribution, radiocarpal articulation contact patterns, and other standard finite element metrics.
View Article and Find Full Text PDFInfluence of hip morphology on gluteal muscle biomechanics: a computational modeling study.
BMC Musculoskelet Disord
January 2025
Department of Orthopaedic Surgery, Atrium Health Musculoskeletal Institute, 2001 Vail Ave, Charlotte, NC, USA.
Background: Hip morphology variations, particularly in femoral neck shaft angle (NSA) and iliac wing width (IWW), have been associated with gluteal tendinopathy. However, the biomechanical implications of these morphological differences on gluteal muscle function are not well understood. This study investigates how NSA and IWW influence gluteal muscle forces, moment arms, and estimated tendon loads during walking, aiming to provide insights into the potential biomechanical pathways that may contribute to altered lateral hip loading patterns.
View Article and Find Full Text PDFEnhancing gait mechanics: The effectiveness of a novel walking aid.
J Orthop Sci
January 2025
Department of Orthopaedic Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama City, Wakayama, 641-8509, Japan.
Background: A walking support orthosis known as the e-foot®, a rubber orthotic worn from the hip to the forefoot to enhance joint flexibility and movement, has been developed to assist elderly people and individuals with walking impairments. Despite its widespread acceptance and positive reception in some care settings, the precise impact of this device on gait dynamics remains unexplored. This study aims to bridge this gap by comparing the walking speeds of healthy volunteers using the e-foot® against their normal walking speeds.
View Article and Find Full Text PDFLateralization study of the basal ganglia, thalamus and supplying arteries in healthy individuals based on structure and connectivity analysis using 7.0T MRI.
Neuroimage
January 2025
Department of Radiology, First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China.. Electronic address:
The human cerebral cortex is known for its hemispheric specialization, which underpins a variety of functions and activities. However, it is not well understood if similar lateralization exists within the deep gray matter nuclei, such as the basal ganglia (BG) and thalamus, and their associated arteries, including the lenticulostriate arteries (LSAs). To explore this, we analyzed images from 7T MRI scans of 40 healthy young individuals.
View Article and Find Full Text PDFIn vitro evaluation of bioabsorbable poly(lactic acid) (PLA) and poly-4-hydroxybutyrate (P4HB) warp-knitted spacer fabric scaffolds for osteogenic differentiation.
Biomed Mater
January 2025
Biomechanics Research Centre (BMEC), School of Engineering, University of Galway, University Road, Galway, H91 TK33, IRELAND.
Bioabsorbable textile scaffolds are promising for bone tissue engineering applications. Their tuneable, porous, fibre based architecture resembles that of native extracellular matrix, and they can sustain tissue growth while being gradually absorbed in the body. In this work, immortalized mouse calvaria preosteoblast MC3T3-E1 cells were cultured in vitro on two warp-knitted bioabsorbable spacer fabric scaffolds made of poly(lactic acid) (PLA) and poly-4-hydroxybutyrate (P4HB), to investigate their osteogenic properties.
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!