scholarly journals Stress Concentration in Open Hole Laminate Composites Under Bending: Potential Application in Dental Implant Prosthesis

2022 ◽  
Vol 25 ◽  
Author(s):  
Harlei Augusto Bueno Alves ◽  
Francisco Maciel Monticeli ◽  
Carolina Machado Martinelli Lobo ◽  
Marcos Yutaka Shiino
Keyword(s):  
Stress Concentration ◽  
Dental Implant ◽  
Potential Application ◽  
Laminate Composites ◽  
Open Hole ◽  
Implant Prosthesis

Treatment of a Maxillary Dento-Alveolar Defect Using an Immediately Loaded Definitive Zygoma Implant-Retained Prosthesis With 11-Month Follow-Up: A Clinical Report

2010 ◽  
Vol 36 (1) ◽  
pp. 31-35 ◽  
Author(s):  
Mirza Rustum Baig ◽  
Gunaseelan Rajan
Keyword(s):  
Soft Tissue ◽  
Dental Implants ◽  
Dental Implant ◽  
The Other ◽  
Clinical Report ◽  
Edentulous Patient ◽  
Implant Prosthesis

Abstract This article describes the dental implant-based rehabilitation of a partially edentulous patient with a unilateral maxillary dento-alveolar defect. A screw-retained prosthesis with a modified design was fabricated on zygomatic and regular dental implants. One section of the implant prosthesis has cemented crowns and the other section is conventional screw-retained. The design of the prosthesis overcame the hard and soft tissue deficit and provided the desired esthetics.

scholarly journals OCCLUSAL CONSIDERATIONS IN IMPLANT DENTISTRY

2020 ◽  
Vol 4 (7) ◽  
Author(s):  
Kadambari Bharali ◽  
Manjula Das ◽  
Rajesh. S. Nongthombam ◽  
Arunoday Kumar ◽  
Syeda Shamima Nastaran Quazi
Keyword(s):  
Dental Implant ◽  
Clinical Applicability ◽  
Implant Prosthesis ◽  
Implant Dentistry ◽  
Natural Dentition ◽  
Derivatives Of

Occlusion is considered to be one of the most important factors contributing to implant success. It is an occlusal scheme which reduces the force at the crestal bone and the implant interface. Therefore, it becomes imperative for the clinician to be well versed with the different concepts when rehabilitating with implant prosthesis. The occlusal rehabilitation schemes for implant-supported prostheses are derivatives of the occlusal scheme for natural dentition. The implant-protected occlusion (IPO) scheme has been designed to obtain an improved longevity of both the dental implant and the prosthesis. The article reviews the concepts of IPO and their different clinical applicability. Keywords: Dental Implant, Occlusion, Implant Protected Occlusion (IPO).

scholarly journals CFRP Thin-Ply Fibre Metal Laminates: Influences of Ply Thickness and Metal Layers on Open Hole Tension and Compression Properties

Materials ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 910 ◽  
Author(s):  
Benedikt Kötter ◽  
Julian Karsten ◽  
Johann Körbelin ◽  
Bodo Fiedler
Keyword(s):  
Stainless Steel ◽  
Stress Concentration ◽  
High Stress ◽  
Image Correlation ◽  
Strength Increase ◽  
Stress Concentrations ◽  
Volume Fractions ◽  
Specific Strength ◽  
Compression Properties ◽  
Open Hole

Thin-ply laminates exhibit a higher degree of freedom in design and altered failure behaviour, and therefore, an increased strength for unnotched laminates in comparison to thick-ply laminates. For notched laminates, the static strength is strongly decreased; this is caused by a lack of stress relaxation through damage, which leads to a higher stress concentration and premature, brittle failure. To overcome this behaviour and to use the advantage of thin-ply laminates in areas with high stress concentrations, we have investigated thin-ply hybrid laminates with different metal volume fractions. Open hole tensile (OHT) and open hole compression (OHC) tests were performed with quasi-isotropic carbon fibre reinforced plastic (CFRP) specimens. In the area of stress concentration, 90° layers were locally substituted by stainless steel layers of differing volume fractions, from 12.5% to 25%. The strain field on the specimen surface was evaluated in-situ using a digital image correlation (DIC) system. The embedding of stainless steel foils in thin-ply samples increases the OHT strength up to 60.44% compared to unmodified thin-ply laminates. The density specific OHT strength is increased by 33%. Thick-ply specimens achieve an OHC strength increase up to 45.7%, which corresponds to an increase in density specific strength of 32.4%.

scholarly journals Effect of Offset Implant Placement on the Stress Distribution Around a Dental Implant: A Three-Dimensional Finite Element Analysis

2015 ◽  
Vol 41 (6) ◽  
pp. 646-651 ◽  
Author(s):  
Hakimeh Siadat ◽  
Shervin Hashemzadeh ◽  
Allahyar Geramy ◽  
Seyed Hossein Bassir ◽  
Marzieh Alikhasi
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Concentration ◽  
Stress Distribution ◽  
Dental Implant ◽  
Three Dimensional ◽  
Element Analysis ◽  
3D Finite Element ◽  
Implant Placement ◽  
Mandibular Molar

There are some anatomical restrictions in which implants are not possible to be inserted in their conventional configuration. Offset placement of implants in relation to the prosthetic unit could be a treatment solution. The aim of this study was to evaluate the effect of the offset placement of implant-supported prosthesis on the stress distribution around a dental implant using 3D finite element analysis. 3D finite element models of implant placement in the position of a mandibular molar with 4 configurations (0, 0.5, 1, 1.5 mm offset) were created in order to investigate resultant stress/strain distribution. A vertical load of 100 N was applied on the center of the crown of the models. The least stress in peri-implant tissue was found in in-line configuration (0 mm offset). Stress concentration in the peri-implant tissue increased by increasing the amount of offset placement. Maximum stress concentration in all models was detected at the neck of the implant. It can be concluded that the offset placement of a single dental implant does not offer biomechanical advantages regarding reducing stress concentration over the in-line implant configuration. It is suggested that the amount of offset should be as minimum as possible.

Stress and Strain Distribution in the Bone Surrounding a New Design of Dental Implant: A Comparison with a Threaded Branemark Type Implant

1993 ◽  
Vol 207 (3) ◽  
pp. 133-138 ◽  
Author(s):  
S E Clift ◽  
J Fisher ◽  
C J Watson
Keyword(s):  
Stress Concentration ◽  
Dental Implant ◽  
Load Transfer ◽  
Bone Ingrowth ◽  
High Stress ◽  
Neck Region ◽  
Lateral Loading ◽  
Porous Coating ◽  
Stress And Strain ◽  
Bonded Interface

The stress and strain distributions in the bone surrounding a new dental implant, designed specifically for use with a bioactive porous coating and thus having a fully bonded interface to the bone, have been analysed. The new implant geometry was slightly tapered, with deep concentric grooves to allow bone ingrowth and load transfer, and had a parallel cylindrical section at the neck. The results have been compared with stress and strain predictions in the bone surrounding a ‘Branemark type’ threaded implant with a fully bonded interface. Under axial loading both implant types produced similar stress and strain distributions with a higher level of stress in the cortical bone surrounding the neck of the implant. Under lateral loading a high stress concentration was found in the neck region of both implants, but this was lower around the neck of the new design compared with the threaded implant. When the new implant was surrounded by cancellous bone, the reduction in the stress concentration was up to 50 per cent. This reduction should help to reduce fatigue failure and bone resorption in this area under lateral loading.

scholarly journals The sensitivity of contact stresses in the mandibular premolar region to the shape of Zirconia dental implant: A 3D finite element study

2018 ◽  
Vol 24 (2) ◽  
pp. 55-63 ◽  
Author(s):  
Duraisamy Velmurugan ◽  
Masilamany Santha Alphin ◽  
Benedict Jain AR Tony
Keyword(s):  
Finite Element ◽  
Stress Concentration ◽  
Cortical Bone ◽  
Transition Region ◽  
Dental Implant ◽  
Cancellous Bone ◽  
Contact Stresses ◽  
Thread Profile ◽  
Von Mises ◽  
Von Mises Stresses

Abstract Background: Implant thread profile plays a vital role in magnitude and distribution of contact stresses at the implant-bone interface. The main goal of this study was to evaluate the biomechanical effects of four distinct thread profiles of a dental implant in the mandibular premolar region. Methods: The dental implant represented the biocompatible Zirconia material and the bone block was modelled as transversely isotropic and elastic material. Three-dimensional finite element simulations were conducted for four distinct thread profiles of a dental implant at 50%, 75%, and 100% osseointegration. An axial static load of 500 N was applied on the abutment surface to estimate the stresses acting within the bones surrounding the implant. Results: Regions of stress concentration were seen mostly along the mesiodistal direction compared to that in the buccolingual direction. The cortical bone close to the cervical region of the implant and the cortical bone next to the first thread of the implant experienced peak stress concentration. Increasing the degree of osseointegration resulted in increased von-Mises stresses on the implant-cortical transition region, the implant-cancellous transition region, the cortical bone, and the cancellous bone. Conclusion: The results show that the application of distinct thread profiles at different degrees of osseointegration had significant effect on the stresses distribution contours in the surrounding bony structure. Comparing all four thread profiles, a dental implant with V-thread profile induced lower values of von-Mises stresses and shear stresses on the implant-cortical transition region, implant-cancellous transition region, cortical bone, and cancellous bone.

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