Objective: To assess the biomechanical performance of cantilevered 2-unit implant-supported prostheses with zirconia and polyetherketoneketone (PEKK) under 3 loading conditions.
Method: A cone beam computer tomography (CBCT) scan of an edentulous mandible was segmented using Mimics software and refined in 3-Matic software to create trabecular and cortical bone structures. Implant CAD files were integrated using SolidWorks software, generating 4 models with varying implant positions: M1 (first premolar implant supporting a second premolar), M2 (second premolar implant supporting a first premolar), M3 (second premolar implant supporting a first molar), and M4 (first molar implant supporting a second premolar). Prostheses were constructed from zirconia or PEKK. Finite element analysis (FEA) in ANSYS software simulated static loading: vertical (100 N) and oblique (30° and 45°, 50 N). von Mises stress and total deformation were analyzed.
Results: Vertical loading showed the highest von Mises stress at cantilever connectors, with M3 displaying the highest cortical bone stress (117 MPa). Zirconia models had slightly higher prosthetic stress, while PEKK models exhibited greater implant and cortical bone stress. Oblique loading caused higher stress in implants and prostheses but remained below yield limits. Maximum deformation was under 25 micrometers for the implant and bone, and 65 micrometers for the prosthesis.
Conclusion: Single implants can support 2-unit cantilevered prostheses when additional implants are unfeasible. The location of the cantilever has minimal impact compared to its size, as a larger cantilevered part increases stress. Zirconia better resists bending forces and reduces implant stress compared to PEKK.
Clinical Significance: This study guides prosthodontists in designing 2-unit implant-supported prostheses, emphasizing that multiple implants optimize stress distribution, and that zirconia is preferable for cantilevered designs.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.identj.2025.01.014 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Supporting islet function in a PVDF membrane based macroencapsulation delivery device by solvent non-solvent casting using PVP.
PLoS One
March 2025
Cell Biology-Inspired Tissue Engineering (cBITE), MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Maastricht, The Netherlands.
Type 1 diabetic (T1D) patients are life-long dependent on insulin therapy to keep their blood glucose levels under control. An alternative cell-based therapy for exogenous insulin injections is clinical islet transplantation (CIT). Currently the widespread application of CIT is limited, due to risks associated with the life-long use of immunosuppressive drugs to prevent rejection of donor cells.
View Article and Find Full Text PDFThis review focuses on the anatomic and radiographic characteristics of the pediatric proximal femur and the advantages and disadvantages of different protocols for the management of pediatric femoral neck fractures (PFNFs) in terms of fracture classification, reduction methods, reduction quality and fixation methods, with the goal of proposing an optimal treatment protocol for PFNFs to reduce the incidence of postoperative complications. The anatomic and radiographic characteristics of the pediatric proximal femur, including the presence of an active growth plate, an immature femoral calcar, greater trabecular density and plasticity and a relatively immature blood supply are very different from those of the adult proximal femur. Treatment protocols for PFNFs must differ from those for adult femoral neck fractures.
View Article and Find Full Text PDFDesign of a Soft Robotic Artificial Cardiac Wall.
Artif Organs
March 2025
The BioRobotics Insitute and Department of Excellence of Robotics & AI, Scuola Superiore Sant'Anna, Pontedera, Italy.
Background: In cardiovascular engineering, the recent introduction of soft robotic technologies sheds new light on the future of implantable cardiac devices, enabling the replication of complex bioinspired architectures and motions. To support human heart function, assistive devices and total artificial hearts have been developed. However, the system's functionality, hemocompatibility, and overall implantability are still open challenges.
View Article and Find Full Text PDFAssociation of Aortic Root and Valve Morphology With De Novo Aortic Valve Regurgitation After Implantation of Left Ventricular Assist Device.
Artif Organs
March 2025
Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine, Suita, Osaka, Japan.
Background: The development of aortic valve regurgitation (AR) negatively affects the survival of patients with continuous-flow left ventricular assist device (LVAD) support. Although several risk factors have been identified, little is known about the effect of preoperative aortic root and valve morphology on the development of de novo AR after LVAD implantation.
Methods: Between April 2018 and September 2023, 87 patients underwent durable LVAD implantation at our department.
Consensus statement on prehabilitation and rehabilitation of osseointegration patients.
OTA Int
March 2025
Atrium Health-Carolinas Rehabilitation, Atrium Health Musculoskeletal Institute, Charlotte, NC.
Rehabilitation protocols vary according to the osseointegration (OI) implant system and the institutions implanting bone-anchored limbs (BALs). While there are limited peer-reviewed OI publications quantifying details for optimizing surgical candidacy and rehabilitation protocols to ensure support across the BAL spectrum, the authors recommend a multidisciplinary team approach over the user's lifetime. Breakout sessions at the Global Collaborative Congress on OI (GCCO) were convened around key topics, including rehabilitation.
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!