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

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.

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

Prosthesis ◽

10.3390/prosthesis1010006 ◽

2019 ◽

Vol 1 (1) ◽

pp. 41-53 ◽

Cited By ~ 10

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.

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Numerical Analysis of the Equivalent Stress at the Interface Bone/Threaded Dental Implant

Journal of Biomimetics Biomaterials and Biomedical Engineering ◽

10.4028/www.scientific.net/jbbbe.34.82 ◽

2017 ◽

Vol 34 ◽

pp. 82-93 ◽

Cited By ~ 1

Author(s):

Yamina Chelahi Chikr ◽

Benali Boutabout ◽

Ali Merdji ◽

Kheira Bouzouina

Keyword(s):

Dental Implant ◽

Equivalent Stress ◽

Three Dimensional ◽

Dental Prosthesis ◽

Published Data ◽

Stress Distributions ◽

Three Dimensional Model ◽

Element Analysis ◽

Bone Implant ◽

Materials Used

The purpose of this study was to develop a new three-dimensional model of an osseointegrated molar dental prosthesis and to carry out finite element analysis to evaluate stress distributions and intensities in the bone and in the components of dental prosthesis under three loads (corono-apical, distal-mesial and buccal-lingual) were applied to the top of the occlusal face of the prosthesis crown. The interfacial stresses were also determined inside and outside of the threading when the dental prosthesis system was subjected to one of three masticatory loads. All materials used in the models were considered to be isotropic, homogeneous and linearly elastic. The elastic properties, loads and constraints used in the model were taken from published data. In this study, the stress concentration occurred around the threaded dental implant neck. Thus, this area should be preserved clinically in order to maintain the bone–implant interface structurally and functionally.

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Investigation of the Effect of Abutment Angle Tolerance on the Stress Created in the Fixture and Screw in Dental Implants Using Finite Element Analysis

Journal of Biomimetics Biomaterials and Biomedical Engineering ◽

10.4028/www.scientific.net/jbbbe.51.63 ◽

2021 ◽

Vol 51 ◽

pp. 63-76

Author(s):

Bijan Mohammadi ◽

Zahra Abdoli ◽

Ehsan Anbarzadeh

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Stress Distribution ◽

Dental Implants ◽

Maximum Stress ◽

Element Analysis ◽

Bone Implant ◽

Implant Placement ◽

And Control ◽

Biomechanical Factors

Today, an artificial tooth root called a dental implant is used to replace lost tooth function. Treatment with dental implants is considered an effective and safe method. However, in some cases, the use of dental implants had some failures. The success of dental implants is influenced by several biomechanical factors such as loading type, used material properties, shape and geometry of implants, quality and quantity of bone around implants, surgical method, lack of rapid and proper implant surface's integration with the jaw bone, etc. The main purpose of functional design is to investigate and control the stress distribution on dental implants to optimize their performance. Finite element analysis allows researchers to predict the stress distribution in the bone implant without the risk and cost of implant placement. In this study, the stresses created in the 3A.P.H.5 dental implant's titanium fixture and screw due to the change in abutment angles tolerance have been investigated. The results show that although the fixture and the screw's load and conditions are the same in different cases, the change of the abutment angle and the change in the stress amount also made a difference in the location of maximum stress. The 21-degree abutment puts the fixture in a more critical condition and increases the chance of early plasticization compared to other states. The results also showed that increasing the abutment angle to 24 degrees reduces the stress in the screw, but decreasing the angle to 21 degrees leads to increased screw stress and brings it closer to the fracture.

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

Journal of Biomimetics Biomaterials and Biomedical Engineering ◽

10.4028/www.scientific.net/jbbbe.37.43 ◽

2018 ◽

Vol 37 ◽

pp. 43-54 ◽

Cited By ~ 3

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.

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Comparison of 3D-Printed Dental Implants with Threaded Implants for Osseointegration: An Experimental Pilot Study

Materials ◽

10.3390/ma13214815 ◽

2020 ◽

Vol 13 (21) ◽

pp. 4815

Author(s):

Ling Li ◽

Jungwon Lee ◽

Heithem Ben Amara ◽

Jun-Beom Lee ◽

Ki-Sun Lee ◽

...

Keyword(s):

Dental Implants ◽

Three Dimensional ◽

Primary Stability ◽

Titanium Implants ◽

Implant Stability ◽

Implant Surgery ◽

Post Surgery ◽

Significant Difference ◽

3D Printed ◽

Stability Measurements

This study aimed to compare bone healing and implant stability for three types of dental implants: a threaded implant, a three-dimensional (3D)-printed implant without spikes, and a 3D-printed implant with spikes. In four beagle dogs, left and right mandibular premolars (2nd, 3rd, and 4th) and 1st molars were removed. Twelve weeks later, three types of titanium implants (threaded implant, 3D-printed implant without spikes, and 3D-printed implant with spikes) were randomly inserted into the edentulous ridges of each dog. Implant stability measurements and radiographic recordings were taken every two weeks following implant placement. Twelve weeks after implant surgery, the dogs were sacrificed and bone-to-implant contact (BIC) and bone area fraction occupied (BAFO) were compared between groups. At implant surgery, the primary stability was lower for the 3D-printed implant with spikes (74.05 ± 5.61) than for the threaded implant (83.71 ± 2.90) (p = 0.005). Afterwards, no significant difference in implants’ stability was observed between groups up to post-surgery week 12. Histomorphometrical analysis did not reveal a significant difference between the three implants for BIC (p = 0.101) or BAFO (p = 0.288). Within the limits of this study, 3D-printed implants without spikes and threaded implants showed comparable implant stability measurements, BIC, and BAFO.

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Numerical Analysis of the Biomechanical Behavior for both Kinds of Dental Structures

Journal of Biomimetics Biomaterials and Biomedical Engineering ◽

10.4028/www.scientific.net/jbbbe.40.26 ◽

2019 ◽

Vol 40 ◽

pp. 26-40

Author(s):

Kheira Bouzouina ◽

Sadek Gouasmi ◽

Djebbar Noureddine ◽

Chelahi Chiker Yamina

Keyword(s):

Finite Element ◽

Numerical Analysis ◽

Three Dimensional ◽

Dental Prosthesis ◽

Finite Element Models ◽

Static Loads ◽

Biomechanical Behavior ◽

Dental Crowns ◽

Dimensional Finite Element ◽

Three Dimensional Finite Element

The aim of the present study is to investigate the comparison between the biomechanical behavior of the dental prosthesis composed of three implants replacing successively the premolar and two molars and the dental bridge located between two implants. Both dental structures were subjected to the same masticatory loading (Corono-apical, Linguo-buccal and Disto- mesial). Three-dimensional finite element models of dental structures were developed to determine the stress distribution under simulated applied loads. In this study the biomechanical behavior of prosthetics dental crowns subjected to static loads in contact with the jawbone has been highlighted. Biomechanical simulations indicated that the equivalent stresses in the dental bridge are greater than that produced in the dental prosthesis. The dental bridge can be assimilated to a beam at the embedded ends, subjected to the bending.

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The effect of osseodensification and different thread designs on the dental implant primary stability

F1000Research ◽

10.12688/f1000research.17292.1 ◽

2018 ◽

Vol 7 ◽

pp. 1898 ◽

Cited By ~ 9

Author(s):

Abdullah Saleh Almutairi ◽

Maher Abdullatif Walid ◽

Mohamed Ahmed Alkhodary

Keyword(s):

Dental Implants ◽

Primary Stability ◽

Chi Square ◽

Machined Surface ◽

Lateral Direction ◽

Bone Implant ◽

Significance Level ◽

Thread Pitch ◽

Custom Made ◽

Significant Difference

Background: It is difficult to achieve good primary stability of dental implants in soft bone, such as that in the posterior maxillae. Osseodensification (OD) burs, working in a non-subtractive fashion, condense the implant osteotomy bone in lateral direction and increase in the bone implant contact. Also, dental implants with deeper threads, and decreased thread pitch can increase initial bone implant anchorage. Methods: This study utilized 48 custom-made machined surface dental implants that were 13 mm long, with a major diameter of 4.5 mm and a minor diameter of 3.5 mm, a thread pitch of 1 mm, a thread depth of 0.5 mm, and a 4 mm long cutting flute at the apex. The implants were divided into 4 groups, each group was made of 12 implants with a different thread design; V-shaped, trapezoid, buttress, and reverse buttress. The implants were inserted in 4-mm thick cancellous bone slices obtained from the head of Cow femur bone. The ostoetomies were prepared by conventional drilling and by OD drilling. Each inserted implant was then tested for primary stability using the Periotest. The Periotest values (PTVs) for the implant stability were tabulated and analyzed using a chi square test at significance level p< 0.05. Results: The results of this this study revealed no statistically significant difference between the Periotest readings for the implants in each category placed in either the OD or the regular osteotomies. However, it has been found that the implants placed in regular drilling ostoetomies had a significantly better primary stability than the implants placed in OD osteotomies. Conclusions: It was concluded that OD is not necessary in situations where there is bone of good quality and quantity.

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Parametric Optimization of Dental Implants

Mechanics and Mechanical Engineering ◽

10.2478/mme-2018-0084 ◽

2020 ◽

Vol 22 (4) ◽

pp. 1061-1076

Author(s):

Wafa Bensmain ◽

Mohammed Benlebna ◽

Boualem Serier ◽

Bel Abbes ◽

Bachir Bouiadjra

Keyword(s):

Dental Implants ◽

Clinical Success ◽

Equivalent Stress ◽

Radius Of Curvature ◽

Geometrical Parameters ◽

Neck Size ◽

Biomechanical Behavior ◽

Dynamic Charging ◽

The Stability ◽

Masticatory Process

AbstractOsseointegration is a fundamental phenomenon of dental implantology. It ensures the stability, the safety and the durability of dental implants and predictable clinical success in long-term. The geometric form of the implant is a defining parameter of osseointegration and implant-bone charge transfer. This is the essential constitutes of this study. In fact, we demonstrate using the finite elements method with tridimensional numerical computations, that the geometrical parameters of the implant conditionate the level and the repartition of the stresses, induced in the cortical bone and the spongy bone during the masticatory process, simulated here by dynamic charging. The effect of several parameters [size and conicity of the implant neck, size and radius of curvature of the implant apex] and the shape of the implant corps on the biomechanical behavior of the bone. The latest was analyzed in terms of variation of the equivalent stress induced in the bone. The purpose of this analysis was the developing of an implant form allowing stress relaxation, during the mastication process, in the living tissue.

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