Evaluation of stress distributions in peri-implant and periodontal bone tissues in 3- and 5-unit tooth and implant-supported fixed zirconia restorations by finite elements analysis

Güven, Sedat; Beydemir, Köksal; Dündar, Serkan; Eratilla, Veysel

doi:10.4103/1305-7456.163223

Cited by 15 publications

(11 citation statements)

References 49 publications

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“…In general, the highest concentration of maximum principal stress was observed at the neck region of all the implants during their insertion. In a study done by Guven et al, stress distribution was evaluated in periodontal and peri-implant bone tissues in 3-and 5-unit-dental and implant-supported zirconia restorations using FEA, wherein it was concluded that maximum principal stress was observed at the premolar and molar region for the implant-supported prosthetic model [26]. Türker et al did the finite element stress analysis of applied forces to implants and supporting tissues using the all-on-four concept with different occlusal schemes and concluded that the highest stress on the implant was concentrated at the posterior region of the mandible when compared to the anterior region [27].…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Maximum Principal Stress, Von Mises Stress, and Deformation on Surrounding Mandibular Bone During Insertion of an Implant: A Three-Dimensional Finite Element Study

Yemineni

Mahendra

Jigeesh

et al. 2020

Cureus

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Aim The present study evaluated maximum principal stress, von Mises stress, and deformation on the mandible and surrounding structures during the insertion of an implant in various anatomical positions. Materials and Methods Finite element models of straight two-piece implants of 4.5 mm × 11.5 mm were modeled using Ansys software, v. 16.0 (Ansys, Inc., Houston, TX, USA). The mandibular model was derived through cone-beam computed tomography of a cadaveric mandible using Mimics software (Materialise NV, Leuven, Belgium). An osteotomy was performed at the first molar region, second premolar region, lateral incisor region, central incisor region, canine region, and second molar region that had varying bone densities. Implant insertion was simulated with a variable load of 1-180 Newton, which was applied axially downward with a rotational velocity of 30-120 rpm. Maximum principal stresses, von Mises stress distribution at the implant insertion site, and maximum deformation on the entire mandible were recorded during the insertion of the implants. Results Maximum principal stress was highest in the crestal area of the right first molar region and least in the middle third of the central incisor region during implant insertion. Von Mises stress in the mandible was highest in the right first molar region and the least in the lateral incisor region during implant insertion. The extent deformation was recorded on the x-axis, y-axis, and z-axis of the mandible. Deformation on the x-axis was highest at the crestal region of the canine and least for the lateral incisor. On the y-axis, deformation was highest at the symphysis region during implant insertion at the first molar region and the least at the condylar area during implant placement in the canine area. On the z-axis, the deformation was highest at the

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Section: Discussionmentioning

confidence: 99%

Evaluation of Maximum Principal Stress, Von Mises Stress, and Deformation on Surrounding Mandibular Bone During Insertion of an Implant: A Three-Dimensional Finite Element Study

Yemineni

Mahendra

Jigeesh

et al. 2020

Cureus

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“…Moreover, different preferential alignment was seen in the Dentate and 12M groups in the infraorbital canal and nasal cavity oors. Sedat et al reported that stress accumulation in bone tissue in a tooth-supported model was less than in an implant-supported model 30) . It can be presumed that the difference in mechanical property between periodontal and peri-implant tissues may explain the stress accumulation reported in the present study.…”

Section: Discussionmentioning

confidence: 99%

Alignment of Biological Apatite Crystallites in Peri-Implant Bone of Beagles

et al. 2017

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The jawbone exists in a special mechanical environment where it is subjected to functional pressure including occlusal force. The internal structure and bone strength of the jawbone might change as a result of tooth loss and implant placement. Therefore, the local bone quality must be evaluated to elucidate the load environment applied to peri-implant jawbone. The present study was conducted to clarify the nanostructural anisotropy of peri-implant jawbone of beagles by quantitatively evaluating biological apatite crystallite alignment. A total of 12 beagles were divided into four groups (dentate jawbone, edentulous jawbone 3 months after tooth extraction, edentulous jawbone 3 months after placing superstructure, and edentulous jawbone 12 months after placing superstructure). Each group comprised three samples. The fourth premolar was considered as the region of interest, with ve measurement points in cortical bone around the implant. Each site was subjected to microbeam X-ray diffraction analysis to evaluate biological apatite crystallite alignment. The results revealed that biological apatite crystallite alignment had been lost in the samples taken after tooth extraction. Furthermore, in the dentate and post-implantation samples, preferential alignment was seen not only in the buccal alveolar region, but also in the infraorbital canal and nasal cavity oors. The results of this study suggested that changes of load environment resulting from dental implant treatment contribute to the expression of unique structural characteristics in peri-implant jawbone, which might affect regions relatively far from implants.

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“…[ 29 30 ] Some authors believe that increasing the number of implants can reduce the stresses on the supporting implants. [ 4 31 ] However, some authors believe that in the triangular arches adding the middle implant may be served as an indirect retainer or as a vertical stop for preventing sitting of the anterior portion of overdenture. [ 32 ] A study by Liu et al .…”

Section: Discussionmentioning

confidence: 99%

Effect of cantilever length on stress distribution around implants in mandibular overdentures supported by two and three implants

2016

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Objective:There is no definitive study comparing stress distribution around two versus three implants in implant-retained overdentures with different cantilever length. The purpose of this finite element study was to evaluate stress pattern around the implants of the 2 or 3 implant- supported mandibular overdenture with different cantilevered length.Materials and Methods:The models used in this study were 2 and 3 implant-supported overdenture with bar and clip attachment system on an edentulous mandibular arch. Each model was modified according to cantilever length (0 mm, 7 mm, and 13 mm); thus, 6 models were obtained. The vertical load of 15 and 30 pounds were applied unilaterally to the first molar and 15 pounds to the first premolar, and the stress in bone was analyzed.Results:With increasing cantilever length, no similar stress pattern changes were observed in different areas, but in most instances, an increase in cantilever length did not increase the stress around the implant adjacent to cantilever.Conclusions:Within the limitations of this study, it can be concluded that increasing of cantilever length in mandibular overdentures retained by 2–3 implants did not cause distinct increasing in stress, especially around the implant adjacent to cantilever, it may be helpful to use cantilever in cases of mandibular overdenture supported by splinted implants with insufficient retention and stability. Based on the findings of this study, optimal cantilever length in mandibular overdenture cannot be determined.

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Evaluation of stress distributions in peri-implant and periodontal bone tissues in 3- and 5-unit tooth and implant-supported fixed zirconia restorations by finite elements analysis

Cited by 15 publications

References 49 publications

Evaluation of Maximum Principal Stress, Von Mises Stress, and Deformation on Surrounding Mandibular Bone During Insertion of an Implant: A Three-Dimensional Finite Element Study

Evaluation of Maximum Principal Stress, Von Mises Stress, and Deformation on Surrounding Mandibular Bone During Insertion of an Implant: A Three-Dimensional Finite Element Study

Alignment of Biological Apatite Crystallites in Peri-Implant Bone of Beagles

Effect of cantilever length on stress distribution around implants in mandibular overdentures supported by two and three implants

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