scholarly journals Prosthetic and Mechanical Parameters of the Facial Bone under the Load of Different Dental Implant Shapes: A Parametric Study

Prosthesis ◽  
2019 ◽  
Vol 1 (1) ◽  
pp. 41-53 ◽  
Author(s):  
Cicciù ◽  
Cervino ◽  
Terranova ◽  
Risitano ◽  
Raffaele ◽  
...  
Keyword(s):  
Dental Implants ◽  
Dental Materials ◽  
Immunological Response ◽  
The Body ◽  
Implant Design ◽  
Implant Surface ◽  
Bone Implant ◽  
Biomechanical Behavior ◽  
Molecular Features ◽  
Von Mises

In recent years the science of dental materials and implantology have taken many steps forward. In particular, it has tended to optimize the implant design, the implant surface, or the connection between implant and abutment. All these features have been improved or modified to obtain a better response from the body, better biomechanics, increased bone implant contact surface, and better immunological response. The purpose of this article, carried out by a multidisciplinary team, is to evaluate and understand, through the use also of bioengineering tests, the biomechanical aspects, and those induced on the patient's tissues, by dental implants. A comparative analysis on different dental implants of the same manufacturer was carried out to evaluate biomechanical and molecular features. Von Mises analysis has given results regarding the biomechanical behavior of these implants and above all the repercussions on the patient's tissues. Knowing and understanding the biomechanical characteristics with studies of this type could help improve their characteristics in order to have more predictable oral rehabilitations.

scholarly journals Macrophagic Inflammatory Response Next to Dental Implants with Different Macro- and Micro-Structure: An In Vitro Study

2021 ◽  
Vol 11 (12) ◽  
pp. 5324
Author(s):  
Maria Menini ◽  
Francesca Delucchi ◽  
Domenico Baldi ◽  
Francesco Pera ◽  
Francesco Bagnasco ◽  
...  
Keyword(s):  
Inflammatory Response ◽  
Dental Implants ◽  
In Vitro Study ◽  
Titanium Implants ◽  
Implant Surface ◽  
Bone Implant ◽  
Optimal Outcomes ◽  
Negative Controls ◽  
Inflammatory Effect

(1) Background: Intrinsic characteristics of the implant surface and the possible presence of endotoxins may affect the bone–implant interface and cause an inflammatory response. This study aims to evaluate the possible inflammatory response induced in vitro in macrophages in contact with five different commercially available dental implants. (2) Methods: one zirconia implant NobelPearl® (Nobel Biocare) and four titanium implants, Syra® (Sweden & Martina), Prama® (Sweden & Martina), 3iT3® (Biomet 3i) and Shard® (Mech & Human), were evaluated. After 4 h of contact of murine macrophage cells J774a.1 with the implants, the total RNA was extracted, transcribed to cDNA and the gene expression of the macrophages was evaluated by quantitative PCR (qPCR) in relation to the following genes: GAPDH, YWHAZ, IL1β, IL6, TNFα, NOS2, MMP-9, MMP-8 and TIMP3. The results were statistically analyzed and compared with negative controls. (3) Results: No implant triggered a significant inflammatory response in macrophages, although 3iT3 exhibited a slight pro-inflammatory effect compared to other samples. (4) Conclusions: All the samples showed optimal outcomes without any inflammatory stimulus on the examined macrophagic cells.

scholarly journals Biomechanics in dental implants

2021 ◽  
Vol 7 (3) ◽  
pp. 131-136
Author(s):  
Poonam Prakash ◽  
Ambika Narayanan
Keyword(s):  
Dental Implants ◽  
Fibrous Tissue ◽  
Primary Stability ◽  
Biological Tissues ◽  
Implant Design ◽  
Implant Fixation ◽  
Implant Surface ◽  
Bone Apposition ◽  
Functional Connection ◽  
Secondary Stage

Achieving primary stability in dental implants is crucial factor for accomplishing successful osteointegration with bone. Micro-motions higher than the threshold of 50 to 100 μm can lead to formation of fibrous tissue at the bone-to-implant interface. Therefore, osteointegration may be vitiated due to insufficient primary stability. Osseointegration is defined as a direct and functional connection between the implant biomaterial and the surrounding bone tissue. Osseointegration development requires an initial rigid implant fixation into the bone at the time of surgery and a secondary stage of new bone apposition directly onto the implant surface. Dental implants function to transfer the load to the surrounding biological tissues. Due to the absence of a periodontal ligament, its firm anchorage to bone, various forces acting on it and the presence of prosthetic components, they share a complex biomechanical relationship. The longevity of these osseointegrated implants depend on optimizing these complex interactions. Hence, the knowledge of forces acting on implant, design considerations of implant and bone mechanics is essential to fabricate an optimized implant supported prosthesis.

A SIMPLE AND EFFICIENT METHODOLOGY TO IMPROVE DESIGN PROPOSALS OF DENTAL IMPLANTS — A DESIGN CASE STUDY

2015 ◽  
Vol 27 (04) ◽  
pp. 1550037 ◽  
Author(s):  
G. Uzcátegui ◽  
E. Dávila ◽  
M. Cerrolaza
Keyword(s):  
Dental Implants ◽  
Dental Implant ◽  
Geometric Characteristic ◽  
Von Mises Stress ◽  
Implant Design ◽  
Improve Design ◽  
Final Design ◽  
Improved Performance ◽  
Von Mises ◽  
Iso 14801

Objective: To propose a methodology based on virtual simulation to assist in the design proposals of dental implants. Methods: The finite element method (FEM) was used to analyze the biomechanical dental implant system behavior, determining von Mises stress distribution induced by functional loads, varying parameter as load direction and geometric characteristic of the implant (taper, length, abutment angulation, thread pitch and width pitch). A final design was obtained by considering the parameters that showed improved performance. The estimated lifetime of the final design was calculated by reproducing in a virtual way the experimental fatigue test required by the ISO:14801 standards. Results: For all the studied cases, the maximum stresses were obtained in the connecting screw under oblique loads (OLs). The estimated lifetime for this critical part is at least 5 × 106 cycles, which meets the requirement of the ISO:14801. In bone tissue, the largest stresses were concentrated in cortical bone, in the zone surrounding the implant, in good agreement with previous reports. Conclusions: A dental implant design was obtained and validated through a simple and efficient methodology based on the application of numerical methods and computer simulations.

scholarly journals The Effect of the Projectile Shape on the Stress Biomechanical Behavior of Dental Implant: Three-dimensional Analysis

2019 ◽  
Vol 63 (4) ◽  
pp. 249-256 ◽  
Author(s):  
Noureddine Djebbar ◽  
Boualem Serier ◽  
Smail Benbarek ◽  
Benali Boutabout
Keyword(s):  
Dental Implants ◽  
Three Dimensional ◽  
Primary Stability ◽  
Dental Prosthesis ◽  
Bone Implant ◽  
Analysis And Design ◽  
Biomechanical Behavior ◽  
Physical Problems ◽  
Implant Abutment ◽  
Biomechanical Factors

The finite element method is used to solve mechanical and physical problems in engineering analysis and design. Primary stability has been regarded as a prerequisite for osseointegration of dental implants. Biomechanical factors play a key role in the success of dental implants. The study of impact velocity is relevant to the biomechanics of dental implants. The purpose of this analysis was to determine the intensity and distribution of stresses in the dental prosthesis elements (crown, framework, implant, abutment, bone) and the sliding at the bone–implant interface under the effect of a mechanical impact of different geometric shape of projectile, this shock simulates a stone throw or other objects coming into contact with the dental prosthesis.

scholarly journals Biomechanical behavior of overdentures supported by different implant position and angulation using Micro ERA® system

2019 ◽  
Vol 18 ◽  
pp. e191667
Author(s):  
Felipe Franco Ferreira ◽  
Guilherme Almeida Borges ◽  
Letícia Del Rio Silva ◽  
Daniele Valente Velôso ◽  
Thaís Barbin ◽  
...  
Keyword(s):  
Finite Element ◽  
Tensile Stress ◽  
Equivalent Stress ◽  
Lateral Incisor ◽  
Von Mises Stress ◽  
Element Analysis ◽  
Bone Implant ◽  
Implant Position ◽  
Biomechanical Behavior ◽  
Von Mises

Aim: The aim of this study was to investigate the biomechanical behavior of implant-retained mandibular overdentures using Micro ERA® system with different implant position and angulation by finite element analysis (FEA). Methods: Four 3D finite element models of simplified mandibular overdentures were constructed, using one Bränemark implant with a Micro ERA® attachment. The implant was positioned on the canine or lateral incisor area with an angulation of either 0º (C-0º; LI-0º) or 17º (C-17º, LI-17º) to the vertical axis. A 100 N axial load was applied in one side simultaneously, from first premolar to second molar. In all models it was analyzed the overdenture displacement, compressive/tensile stress in the bone-implant interface, and also the von Mises equivalent stress for the nylon component of the housing. The stresses were obtained (numerically and color-coded) for further comparison among all the groups. Results: The displacement on the overdenture was higher at the posterior surface for all groups, especially in the C-17º group. When comparing the compressive/tensile stress in the bone-implant interface, the lateral-incisor groups (LI-0º and LI-17º) had the highest compressive and lowest tensile stress compared to the canine groups (C-0º and C-17º). The von Mises stress on the nylon component generated higher stress value for the LI-0º among all groups. Conclusions: The inclination and positioning of the implant in mandibular overdenture interferes directly in the stress distribution. The results showed that angulated implants had the highest displacement. While the implants placed in the lateral incisor position presented lower compressive and higher tensile stress respectively. For the attachment the canine groups had the lowest stress.

Immediate Loading in the Maxillary Arch: Evidence-Based Guidelines to Improve Success Rates: A Review

2011 ◽  
Vol 37 (5) ◽  
pp. 610-621 ◽  
Author(s):  
Sean Chung ◽  
Anthony McCullagh ◽  
Tassos Irinakis
Keyword(s):  
Dental Implants ◽  
Treatment Option ◽  
Treatment Plan ◽  
Primary Stability ◽  
The Body ◽  
Implant Design ◽  
Immediate Loading ◽  
Success Rates ◽  
The Status ◽  
Implant Restoration

The reliability of immediately loaded dental implants in the mandible has prompted many to investigate their application in the maxilla. Although the body of literature is growing, the long-term survivability of immediate loading in the maxilla is still pending. This review of literature investigates the status of immediate loading of dental implants in the maxilla to determine its predictability as a treatment option for partial and complete maxillary edentulism. Current terminology in the field is summarized first. Subsequently, the rationale and advantages of immediate loading in the maxilla are reviewed, and the relationships between immediate loading and osseointegration, primary stability, implant design, micromotion, immediate implant placement, and bone character are explored. The importance of a prosthodontically driven implant treatment plan emphasizing the role of splinting a high-precision and passively fitting implant restoration with reduced micromotion under function is summarized. The reliability and predictability of immediately loaded implants as a treatment option are proposed, and recommended guidelines for the successful delivery of immediately loaded implants in the maxilla are presented.

Load Transfer Along the Bone-Dental Implant Interface

2009 ◽  
Author(s):  
Samira Faegh ◽  
Sinan Müftü
Keyword(s):  
Dental Implants ◽  
Load Transfer ◽  
Surface Characteristics ◽  
Systematic Investigation ◽  
Long Term Results ◽  
Implant Design ◽  
Patient Specific ◽  
Success Rates ◽  
Bone Implant ◽  
Patient Specific Implants

Endosseous dental implants are used as prosthetic treatment alternatives for treating partial edentulism [1]. Excellent long term results and high success rates have been achieved using dental implants during the past decades. Further improvements in implant protocols will include immediate loading, patient specific implants, applications for patients with extreme bone loss and extreme biting habits such as bruxism. The implant designs available in the market vary in size, shape, materials and surface characteristics [2], and address some of these concerns. An important factor in the implant design is the load transfer from the implant to bone during occlusal loading.[2,3] Load transfer starts along the bone-implant interface, and is affected by the loading type, material properties of the implant and prosthesis, implant geometry, surface structure, quality and quantity of the surrounding bone, and nature of the bone-implant interface [4]. While many studies using the finite element method (FEM) have been carried out [2–5], a systematic investigation of the load transfer at the bone implant interface, and the effects of various parameters that make the implant contour is lacking. The goal of this paper is to investigate one aspect of this multivariable problem, namely the effect of external implant threads on the load transfer along the bone-implant interface.

Numerical Evaluation of Biomechanical Stresses in Dental Bridges Supported by Dental Implants

2018 ◽  
Vol 37 ◽  
pp. 43-54 ◽  
Author(s):  
Amel Boukhlif ◽  
Ali Merdji ◽  
Noureddine Della ◽  
El Bahri Ould Chikh ◽  
Osama Mukdadi ◽  
...  
Keyword(s):  
Dental Implants ◽  
Load Transfer ◽  
Three Dimensional ◽  
Surgical Techniques ◽  
Von Mises Stress ◽  
Bone Implant ◽  
External Part ◽  
Von Mises ◽  
Von Mises Stresses ◽  
The Impact

The number of supporting dental implants is an important criterion for the surgical outcome of dental bridge fixation, which has considerable impact on biomechanical load transfer characteristics. Excessive stress at the bone–implant interface by masticatory loading may result in implant failure. The aim of this study was to evaluate the impact of the number of implants supporting the dental bridge on stress in neighboring tissues around the implants. Results of the study will provide useful information on appropriate surgical techniques for dental bridge fixation. In this study, osseointegrated smooth cylindrical dental implants of same diameter and length were numerically analyzed, using three-dimensional bone–implant models. The effect of the number of supporting implants on biomechanical stability of dental bridge was examined, using two, three and four supporting implants. All materials were assumed to be linearly elastic and isotropic. Masticatory load was applied in coron-apical direction on the external part of dental bridge. Finite Element (FE) analyses were run to solve for von Mises stress. Maximum von Mises stresses were located in the cervical line of cortical bone around dental implants. Peak von Mises stress values decreased with an increase in the number of implants that support the dental bridge. Results of this study demonstrate the importance of using the correct number of supporting implants to for dental bridge fixation.

scholarly journals Effect of Surgical Installation of Dental Implants on Surface Topography and Its Influence on Osteoblast Proliferation

2018 ◽  
Vol 2018 ◽  
pp. 1-13 ◽  
Author(s):  
Helder H. M. Menezes ◽  
Marina M. Naves ◽  
Henara L. Costa ◽  
Tarsis P. Barbosa ◽  
Jéssica A. Ferreira ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Surface Topography ◽  
Dental Implants ◽  
Titanium Surface ◽  
Laser Interferometry ◽  
Implant Design ◽  
Implant Surface ◽  
Subtle Change ◽  
Implant Placement ◽  
Significant Difference

Surface treatment alone does not determine the final microtopography of a dental implant, which can be influenced by implant design and the surgical procedure. This study investigated the effect of surgical placement of dental implants with same surface treatments on surface roughness. Three implants (SIN) of each group with different macrogeometries (Strong, Stylus, and Tryon) were analyzed using laser interferometry and scanning electron microscopy to evaluate surface topography. All threaded regions of the implants, namely, top, flank, and valley, were analyzed individually. Relevant surface parameters (Sa, Ssk, Sku, Str, and Sdq) were calculated for the different regions on each implant before (B) (n = 9) and after (A) (n = 9) placement into porcine rib bones. The behavior and proliferation of a preosteoblastic cell line MC3T3-E1 on titanium surface, cell viability, and osteopontin secretion were evaluated after 24 h, 48 h, and 96 h, also before (n = 18) and after (n = 18) implant placement into porcine ribs bone. As results, the valleys of all implants had an increase in Sa values after implant placement. By contrast, the tops of the Stylus A implant and the flanks of the Tryon A implant showed a significant decrease in mean height of the irregularities (Sa), 0.16 µm and 1.25 µm, respectively. The Stylus implant presented significantly (p<0.05) higher asymmetry values on the distribution curve for irregularity heights (Sku) in all regions after insertion into bone (6.99 for tops, 9.54 for flanks, and 17.64 for valleys), indicating a greater preponderance of peaks over valleys. An increase in roughness gradients (Sdq) was observed for all macrogeometries after insertion into bone. The cell culture results showed no significant difference (p>0.05) for all macrogeometries after bone placement. In conclusion, a subtle change in implant surface roughness was detected after insertion into bone for all the macrogeometries, without significantly affecting the cellular parameters studied.

scholarly journals DENTAL IMPLANT DESIGN- AN INSIGHT OVERVIEW

2021 ◽  
Vol 10 (4) ◽  
pp. 3101-3105
Author(s):  
Ajit Singh
Keyword(s):  
Dental Implants ◽  
Dental Implant ◽  
Alveolar Bone ◽  
Surface Characteristics ◽  
Implant Design ◽  
Dimensional Structure ◽  
Missing Teeth ◽  
Implant Surface ◽  
Number Of Patients

Dental implants are a proven therapeutic option for replacing missing teeth, with positive long-term health outcomes. Dental implant performance is largely determined by the implant’s primary durability, which is affected by surgical procedure, bone quality and quantity, implant surface characteristics, implant geometry, and implant surface characteristics. The implant’s geometry and surface can be modified. The implant geometry and surface can be changed if needed to achieve good primary stability and long-term implant therapy effectiveness. Implant architecture refers to the implant’s three-dimensional structure, as well as all of the components and elements that make it up. Different surface topographies can affect a sequence of coordinated actions such cell proliferation, osteoblast transformation, and the production of bone tissue. At the macro, micro, and increasingly nano sizes, surface topography of implants may be detected. The surgical location of end osseous oral implants is influenced by the prosthetic architecture, as well as the shape and quality of the alveolar bone. There are several alternatives for replacing missing teeth, but within the past few decades, dental implants have been one of the most common biomaterials for replacing one (or more) missing teeth. In a substantial number of patients, titanium dental implants have been shown to be secure and reliable. This study examines the most important historical information of dental implants, as well as the various vital factors that will ensure successful Osseo-integration and a safe prosthesis anchorage. Not only

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