The Effect of Implant Thread Design on Stress Distribution in Anisotropic Bone with Different Osseointegration Conditions: A Finite Element Analysis

Mosavar, Alireza; Ziaei, Alireza; Kadkhodaei, Mahmoud

doi:10.11607/jomi.4091

Cited by 49 publications

(51 citation statements)

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“…The buttress and the square thread showed less than 5% deviation when the degree of osseointegration was increased from 50% to 75% and 100%. This result is in contrast to the findings published by Mosavar et al [30]. They reported that the dental implant with a square thread induced lowest contact stresses induced at all distinct degrees of osseointegration.…”

Section: Discussioncontrasting

confidence: 98%

“…The magnitude of contact stresses induced on the cortical bone was not sensitive to the thread profile type (Tables 2-4). This result is in line with the findings published by Mosavar et al [30] and Hansson and Werke [33].…”

Section: Discussionsupporting

confidence: 93%

“…Increasing the degree of osseointegration from 50% to 100% resulted in 8% to 10% increase of peak von-Mises stresses induced on the implant-cortical transition region, implantcancellous transition region, cortical bone, and cancellous bone ( Table 2). This increase in peak von-Mises stresses is in line with the reported values in the literature [30]. The results suggest that the implant-bone setup which is partially osseointegrated is more prone to failure.…”

Section: Discussionsupporting

confidence: 90%

“…In the case of a dental implant, the peak vertical bite force was around 500 N in the mandibular molar region [28]. Therefore, in this study, an axial static occlusal load of 500 N was applied on the top of the implant surface as a 0.07 GPa compressive stress [29,30] as shown in…”

Section: Boundary and Loading Conditionsmentioning

confidence: 99%

See 3 more Smart Citations

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

Velmurugan¹,

Alphin²,

Tony³

2018

Polish Journal of Medical Physics and Engineering

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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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Section: Discussioncontrasting

confidence: 98%

Section: Discussionsupporting

confidence: 93%

Section: Discussionsupporting

confidence: 90%

Section: Boundary and Loading Conditionsmentioning

confidence: 99%

See 2 more Smart Citations

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

Velmurugan¹,

Alphin²,

Tony³

2018

Polish Journal of Medical Physics and Engineering

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“…Thread depth, thread thickness, thread face angle, thread pitch, and thread helix angle are some of the geometric variations that determine the functional thread surface and affect the biomechanical load distribution around the implant. The greater the number of threads is as influential as depth of the threads, as they result in more functional surface area (20).…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Basal Dental Implants in Posterior Mandible

Omar

Eldibany

Melek

2020

Alexandria Dental Journal

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INTRODUCTION: Dental implants provide a unique treatment modality for the replacement of a lost dentition. OBJECTIVES: The aim of this study was to evaluate the placement of newly designed basal dental implant in the posterior mandible. MATERIALS AND METHODS: This clinical study was conducted on 15 basal dental implants placed in 8 patients having missing lower posterior teeth. The patients were followed up clinically daily for the first week then weekly for the first month postoperatively regarding pain, edema and any post-operative complications. Radiographic evaluation was performed by cone beam computed tomography (CBCT) preoperatively, immediately and 3 months postoperatively. Periotest was used to determine implant stability immediately and 3 months postoperatively. RESULTS: All the results were evaluated clinically, radioghraphically and statistically. Clinically, mild pain and edema occurred and subside 1 to 4 days post-operatively without post-operative complication. Radiographically bone density has shown significant increase immediately post-operatively. CONCLUSIONS: The sharp threads of Roott basal dental implants allowed good bone anchorage and high primary stability which is one of the main factors of implants success.

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Probing combinational influence of design variables on bone biomechanical response around dental implant‐supported fixed prosthesis

et al. 2022

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This study aimed to understand the effect of physiological and dental implant-related parameter variations on the osseointegration for an implant-supported fixed prosthesis. Eight design factors were considered (implant shape, diameter, and length; thread pitch, depth, and profile; cantilever [CL] length and implant-loading protocol). Total 36 implantation scenarios were simulated using finite element method based on Taguchi L 36 orthogonal array. Three patient-specific bone conditions were also simulated by scaling the density and Young's modulus of a mandible sample to mimic weak, normal, and strong bones. Taguchi method was employed to determine the significance of each design factor in controlling the peri-implant cortical bone microstrain. For normal bone condition, CL length had the maximum contribution (28%) followed by implant diameter (18%), thread pitch (14%), implant length (8%), and thread profile (5%). For strong bone condition, CL and implant diameter had equal contribution (32%) followed by thread pitch (7%) and implant length (5%). For weak bone condition, implant diameter had the highest contribution (31%) followed by CL length (30%), thread pitch (11%) and implant length (8%). The presence of distal CL in dental framework was found to be the most influential design factor, which can cause high strain in the cervical cortical bone. It was seen that implant diameter had more effect compared to implant length toward peri-implant bone biomechanical response. Implant-loading time had no significant effect towards peri-implant bone biomechanical response, signifying immediate loading is possible with sufficient mechanical retention.

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The Effect of Implant Thread Design on Stress Distribution in Anisotropic Bone with Different Osseointegration Conditions: A Finite Element Analysis

Cited by 49 publications

References 0 publications

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

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

Evaluation of Basal Dental Implants in Posterior Mandible

Probing combinational influence of design variables on bone biomechanical response around dental implant‐supported fixed prosthesis

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