Three-Dimensional Finite Element Analysis of Internal Connection Implant System (Gsii$^{(R)}$) According to Three Different Abutments and Prosthetic Design (original) (raw)
Related papers
Journal of dental research, dental clinics, dental prospects, 2013
Background and aims. The aim of this study was to determine the stress patterns within an implant and the effect of different types of connections on load transfer. Materials and methods. Three different types of implant-abutment connections were selected for this study. Sample A: 1.5-mm deep internal hex corresponding to a lead-in bevel; sample B: a tri-channel internal connection; and sample C: in-ternal Morse taper with 110 degrees of tapering and 6 anti-rotational grooves. Four types of loading conditions were simu-lated in a finite element model, with the maximum von Mises stress set as output variables. Results. The maximum stress concentration at the inner surface of the fixtures was higher than the stress value in bone in all of the samples. Stress values in sample B were the lowest amongst all of the models. Any alterations in the amount and direction of the 100-N axial load resulted in an increase in fixture surfaces stress. Overall, the highest amount of stress (112 MPa) ...
International Journal of Innovative Research in Technology, 2018
A dental implant (also known as an endosseous implant or fixture) is a surgical component that interfaces with the bone of the jaw or skull to support a dental prosthesis such as a crown, bridge, denture, facial prosthesis or to act as an orthodontic anchor. S uccess or failure of depends on the health of the person receiving the treatment, drugs which affect the chances of osseointegration, and the health of the tissues in the mouth. The amount of stress that will be put on the implant and fixture during normal function is also evaluated. Planning the position and number of implants is key to the long-term health of the prosthetic since biomechanical forces created during chewing can be significant. This paper focuses on study of impact of parameters like depth, pitch and thickness of the implant profile on stress intensity. The mechanical aspects of the implant are studied through analysis. The paper includes selection of implant, Finite element anal ysis to find stress intensity and representation of effect of parameters on the value of stress intensity using MINITAB software. The aim is to study the effect of variation of various parameters on the stress intensity on the bones. This aim is to be achieved by varying the mechanical parameters (depth, pitch and thickness) of the dental implant and performing static stress FEA analysis. The effect is studied, and results are interpreted and analyzed by using MINITAB software.
Journal of Oral Implantology, 2015
This study evaluated the effects of axial and oblique occlusal loading on implant-supported partial dentures with different connection systems (external hexagon, internal hexagon, and Morse taper). Upon axial loading, all systems presented similar stress values. Stress values increased under oblique loading. Stress distribution changed for some of the internal connection structures. It can be concluded that oblique load increases stress on bone structures and prosthetic components. Internal connection system implants present more favorable stress distribution patterns than do external connection system implants.
The Journal of Contemporary Dental Practice
Aim: The aim of the present study was to assess the occlusal stress on the implant-abutment junction and implant-bone interface of a longspan implant-supported prosthesis made of two different prosthetic materials. Materials and methods: A computerized tomography of the mandible was used to get the finite element model of the bone. The comparative groups were made as follows: S1 and S2-3.7 × 11 mm (44 region) and 4.5 × 11 mm (47 region), S1A and S2A-screw-retained porcelain-fusedto-metal prosthesis, S1B and S2B-cement-retained porcelain-fused-to-metal prosthesis, S1C and S2C-screw-retained zirconia prosthesis, and S1D-cement-retained zirconia prosthesis. Maximum stress generated on the implant-abutment interface of all the prostheses under vertical and oblique load was assessed. Results: For all the comparative groups, maximum level of stress was generated at the cervical level of the implant-bone interface in comparison to the apical and middle-third level under both vertical and oblique load. No statistically significant difference between zirconia and porcelainfused-to-metal prosthesis was seen at the implant-abutment interface and the cervical third of the implant-bone interface. A significant difference was found between all screw-retained and cement-retained groups. Conclusion: The present study concluded that the short implants in combination with standard-length implants using either porcelain-fusedto-metal or zirconia as prosthetic material in the form of long-span implant-supported prosthesis can be a viable treatment option in the posterior mandible. Clinical significance: The accuracy of the diagnosis, examination, and knowledge of the site where the implant must be inserted, and the choice of superstructure is important for the stability and lifespan of the implant prosthesis.
Purpose: This investigation was concerned with the effect of 3 superstructure materials on the strain around an implant under static and nonimpact dynamic loading. Materials and Methods: Five highly filled composite resin–veneered crown analogs, 5 autopolymerized acrylic resin–veneered crown analogs, and 5 gold-alloy full cast crown analogs were prepared. The resin veneers were applied to gold-alloy frameworks. These crown analogs were prepared to fit an ITI implant-abutment assembly, which was screwed into a block of acrylic resin to simulate implantation in bone. The crown analogs were successively placed on the abutment, and a lateral load of 100 N was applied to the superstructure by a lever-type testing machine. Strains were recorded under static and dynamic loading by a 2-mm-long strain gauge bonded to the surface of the bone simulant tangential to the implant. The dynamic load simulated masticatory cycles (75 strokes/min). Results: Although the strain values differed significantly between the static and dynamic loading (P .05), there was no significant difference among the superstructure materials under either loading condition (P .05). Discussion: These findings are in agreement with in vivo measurements, thus suggesting that cyclic rather than impact loading should be used in the investigation of occlusal material behavior under functional loading. Conclusion: Under static and nonimpact dynamic loading, the 3 superstructure materials tested (highly filled composite resin, acrylic resin, and gold alloy) had the same influence on the strain transmitted to a bone simulant that surrounded a single implant. INT J ORAL MAXILLOFAC IMPLANTS 2004; 19:735–742
Prosthesis
Dental implant macro- and micro-shape should be designed to maximize the delivery of optimal favorable stresses in the surrounding bone region. The present study aimed to evaluate the stress distribution in cortical and cancellous bone surrounding two models of dental implants with the same diameter and length (4.0 × 11 mm) and different implant/neck design and thread patterns. Sample A was a standard cylindric implant with cylindric neck and V-shaped threads, and sample B was a new conical implant with reverse conical neck and with “nest shape” thread design, optimized for the favorable stress distribution in the peri-implant marginal bone region. Materials and methods: The three-dimensional model was composed of trabecular and cortical bone corresponding to the first premolar mandibular region. The response to static forces on the samples A and B were compared by finite element analysis (FEA) using an axial load of 100 N and an oblique load of 223.6 N (resulting from a vertical lo...
Balkan Journal of Dental Medicine, 2019
Summary Background/Aim: A factor affecting the success rate of dental implants, which has been used successfully for many years, is the implant-abutment connection system. The purpose of this study was to evaluate the stress distribution of different implant-abutment connection systems under different forces. Material and Methods: This in vitro study included a finite element analysis. In the study, the cylindrical and screwed dental implants available in 3 different diameters from 4 different companies were categorized into 12 different models. Two different scenarios of force application were conducted on each model in this study. In the first scenario, 100 N force and 100 N moment were applied in a vertical direction onto a point considered as the center of each tooth. In the second scenario, a 100 N force and moment were applied at a 45° angle in an oblique direction. Results: As a result of the forces applied to dental implants of different diameters from different companies, o...
2020
In this study, the effect of different abutment materials on the stress distribution in bone tissue around the dental implant was investigated using ANSYS packet program based on finite element method. The study aims to examine the stresses, strains and deformations that will occur in the bone, dental implants and abutments with the replacement of abutment materials on the titanium dental implant. Modeling has been prepared in Solidworks program. Titanium was chosen as the dental implant material. Abutment materials were selected as titanium, zirconium, chrome-cobalt and polyetheretherketone. After modeling, necessary load was applied to the abutments and analyzed. This process was repeated for each abutment material. As a result of the analyzes, the stresses, strains and deformations that occurred in the bone, dental implants and abutments were combined into tables. In the conclusion, the differences between the abutment materials were evaluated. Generally, it was found that the lo...
Stress-based performance comparison of dental implants by finite element analysis
The geometric shape of a dental implant plays an important role on the osteo-integration process. The purpose of this paper is to study the biomechanical behavior of different commercial dental implants and to analyse how thread profile may affect the stress concentration and distribution. Three different commercially-available dental implants were considered and acquired by means of a no-contact reverse engineering system. Stresses at bone-implant interface, in presence of perfect and not-perfect osteo-integration, were numerically evaluated by means of finite element (FEM) analyses applying occlusal and lateral loads. The results show more dangerous stresses at implant-bone interface in the case of not-perfect osteo-integration and stresses gradient enough uniform around the threads in the case of osteo-integration. In particular, the implant with the lowest thread-pitch exhibits the lowest bone damage. This confirms the crucial role of the geometric shape of the implant to reduce bone induced stresses and bone damage. The structural and functional connection between living bone and implant is a key issue in implantology field. When a guest device is installed in the living bone, many clinical responses may arise, such as inflammatory processes or osteo-integration failure. The results of this study can give useful information to understand the influence of the implant features and to appropriately apply it in the science of dental implants with the aim to reduce the potential implant failure.