Effects of tightening torque on screw stress and formation of implant-abutment microgaps: A finite element analysis

Tonin, Bruna Santos Honório; He, Yiting; Ye, Ning; Chew, Hooi Pin; Fok, Alex

doi:10.1016/j.prosdent.2020.11.026

Cited by 17 publications

(17 citation statements)

References 33 publications

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“…Several design parameters that can modify the implants mechanical response have already demonstrated their role in the bone tissue mechanical response during chewing loading. For that reason, a possible variation in the stress magnitude between different implant manufacturers would be noticed due to the differences in threads design [42], conicity [43], length [44], diameter [45], abutment misfit [46], prosthetic connection [47], titanium alloys [40], torque quantity [48], abutment material [49] and antagonist structure [50]. However, despite the effect of all these factors have been already investigated in previous reports, the present results can be useful especially when considering the stress distribution modification by the implant neck design, that should occurs proportionally between the different implant systems.…”

Section: Discussionmentioning

confidence: 99%

The role of cortical zone level and prosthetic platform angle in dental implant mechanical response: A 3D finite element analysis

et al. 2021

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Section: Discussionmentioning

confidence: 99%

The role of cortical zone level and prosthetic platform angle in dental implant mechanical response: A 3D finite element analysis

et al. 2021

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“…The development of micro-gaps at the interface of implant-to-abutment can be decreased by increasing the screw torque. The abutment screw's mean stress will increase as a result, albeit this could shorten the prosthesis's fatigue life as well [60].…”

Section: Tonin Et Almentioning

confidence: 99%

Finite Element Modelling Based Studies for Dental Implants: Systematic Review

Shakir

Muhsin

Marza

2022

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Finite element analysis (FEA) has been used to evaluate dental implant designs, superstructure structure; material, and surrounding bone stability. According to PubMed, and Google scholar, much FEA research on dental implants was published between 1988 and 2022. Finite element analysis is an advanced technology used to examine implant-abutment links, dental implant design, and implant screw architecture to verify its usability and dependability in the field of dental implantology. The purpose of this FEA literature study was to go over the concept applications of the finite element method (FEM) in dental implantology. Many health-related problems, notably in dental implantology, can be swiftly and simply solved utilizing finite element methods, which combine strength, stress, material science, and architecture. Finite element methods not only give speedy and reliable data on the patients under investigation, but they also act as essential guidance for many clinical trials. To have a better understanding of the finite element modelling method. For many years, the FEA approach has been employed in medicine and is frequently used in the study of dental implantology. It is a useful tool for permitting endless replication of studies that cannot be duplicated clinically in one-to-one circumstances in various settings.

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“…12 Screw loosening may lead to mechanical problems such as loss of function due to excessive prosthesis displacement, loosening of other screws in a multi-unit prosthesis, fracture of screws due to fatigue, loss of restoration, and loss of the implant due to inadequate osseointegration, and biological problems such as microleakage, soft tissue irritation and peri-implantitis. 13,14 Zirconia abutments have become popular in prosthetic treatments due to their superior optical properties compared to titanium and higher fracture resistance than alumina. In vitro studies have reported that the fracture resistance of zirconia abutments exceeds their maximum bite force of 90 to 370 N. 15,16 Unlike the classical failure models described for titanium systems, crack initiation and propagation caused by fatigue in zirconia due to plastic deformation of screw and implant parts cause fractures in thin parts of the ceramic structure.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Biomechanical Effects of Prosthetic Components With Different Materials on the Abutment Screw

Gökay

Gökçimen

Durkan³

2022

Cumhuriyet Dental Journal

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Objectives:The aim of this study was to assess the effects of different resin-based and ceramic superstructure materials and two different abutment types on the stress distribution of the abutment screw using the method of three-dimensional finite element stress analysis. Materials and Methods:A three-dimensional implant, abutment (zirconia and titanium), abutment screw, crown (zirconia reinforced lithium silicate, lithium disilicate, polymer-infiltrated resin ceramic, and PEEK), and alveolar bone were designed using Rhinoceros 3D modeling software and VRMesh Studio software to form 8 simulations. On the models prepared, loading was made on the lingual tubercle of the maxillary right first premolar crown at an angle of 30° with 150 N force obliquely in the buccolingual direction. The von Mises stress values obtained from the abutment screw were compared according to the types of abutment and crown materials. Results:The von Mises stress values in the abutment screw were higher in the models using a titanium abutment (on average 1336.24 MPa), and the lower stress values were obtained in the models using a zirconia abutment (on average 964.26 MPa). When the prosthetic material used was changed, the stress values on the abutment screw was similar.Conclusions: Considering that the abutment screw is the weakest component of the implant-system, zirconia abutments can be used reliably in the maxillary first premolar region where aesthetic expectations are high.

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Effects of tightening torque on screw stress and formation of implant-abutment microgaps: A finite element analysis

Cited by 17 publications

References 33 publications

The role of cortical zone level and prosthetic platform angle in dental implant mechanical response: A 3D finite element analysis

The role of cortical zone level and prosthetic platform angle in dental implant mechanical response: A 3D finite element analysis

Finite Element Modelling Based Studies for Dental Implants: Systematic Review

Evaluation of Biomechanical Effects of Prosthetic Components With Different Materials on the Abutment Screw

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