The influence of the connection, length and diameter of an implant on bone biomechanics

Borie, Eduardo; Orsi, Iara Augusta; Araújo, Carlos P. R. de

doi:10.3109/00016357.2014.961957

Cited by 25 publications

(28 citation statements)

References 82 publications

(151 reference statements)

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“…Using implants with higher length could increase the resistance arm and improve the stress distribution (7,8). According to Rubo et al (7), increasing implants length from 10 to 13 mm contributes a decrease of about 14% in total stress.…”

Section: Introductionmentioning

confidence: 99%

Influence of Abutment Collar Height and Implant Length on Stress Distribution in Single Crowns

2019

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This in silico study evaluated the influence of the abutment collar height and implants length on the biomechanical behavior of morse taper single dental implants with different crown-to-implant ratio. Six virtual models were constructed (S11, M11, L11, S13, M13 and L13) by combining short (S: 2.5 mm), medium (M: 3.5 mm) or long (L: 4.5 mm) abutment collar heights with different implant lengths (11 or 13-mm). An upper central incisor of 11-mm height was constructed on top of each abutment. Each set was positioned in a virtual bone model and exported to analyze mathematically. A 0.60-mm mesh was created after convergence analysis and a 49 N load was applied to the cingulum of the crown at an angle of 45°. Load-generated stress distribution was analyzed in the prosthetic components according to von Mises stress criteria (σvM) and in the cortical and cancellous bone by means of shear stress (εmax). The use of longer collar abutments (L11) increased the stress on the abutment by 250% and resulted in 40% higher stresses on the screw and 92% higher cortical shear stresses compared to short collared abutments (S11). Increasing the implant length produced a slight stress reduction on cortical bone. Cancellous bone was not affected by the crown-to-implant ratio. Longer abutment collars concentrate stresses at the implant level and cortical bone by increasing the crown-to-implant ratio.

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Section: Introductionmentioning

confidence: 99%

Influence of Abutment Collar Height and Implant Length on Stress Distribution in Single Crowns

2019

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“…When a non-axial load is applied to the metallic framework, the morse taper implants, which have less movement of its components and a biomechanical behavior similar to that of a single body implant (Borie et al, 2015), may present larger total deformation because of the movement of the structure as a single solid body (Kitagawa et al 2005). Different from a morse taper implant, the external hexagon connection consists of three structures (Pessoa et al, 2010); when a non-axial load is applied, micromotion occurs in the inner parts of the implant-abutment assembly, mainly due to the hexagon size (Maeda et al), resulting in minor total deformation as a whole system.…”

Section: Discussionmentioning

confidence: 99%

Total Deformation of Multiple Implant-Supported Prostheses through Three-Dimensional Finite Element Analysis

Borie

Orsi

Noritomi

et al. 2015

Int. J. Odontostomat.

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The purpose of this study was to evaluate through finite element analysis (FEA) the total deformation or displacement as a whole system of multiple implant-supported prostheses in the maxillary anterior region with different implant's length, connection, location and restoration material. An edentulous anterior region of a hemi-maxilla model was used in finite element analysis. The simulations were divided in two groups according to treatment plan: 1) two implants were placed in the upper central incisors, simulating an implant-supported fixed prosthesis (acrylic resin and metal-ceramic) of four elements with cantilever of both upper lateral incisors; 2) two implants placed in the upper lateral incisors, simulating a conventional fixed prosthesis of four elements with both upper central incisors as pontic. Models with cantilever prosthesis in acrylic resin showed the highest values of total deformation, which were 17 times higher than those of metal-ceramic in the distal face of the lateral incisors, regardless of the type of implant connection. In conventional prostheses in acrylic resin, external hexagon connections had lower total deformation values compared with morse taper connection. Also, the implant length was found to have no effect on the values of total deformation. In conclusion, total deformation was substantially greater in all models with acrylic resin restorations.

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“…Biomechanical analyses have determined that the types of implant-connections have different behaviors 3 . In external hexagon models, axial preload of the abutment screw is the determining factor for the stability of the connection, with the possibility of abutment rotation.…”

Section: Introductionmentioning

confidence: 99%

“…In external hexagon models, axial preload of the abutment screw is the determining factor for the stability of the connection, with the possibility of abutment rotation. On the other hand, a morse taper implant has more stability considering its better biological seal, mechanical strength, and greater resistance to movement 3 .…”

Section: Introductionmentioning

confidence: 99%

Influence of cantilever position and implant connection in a zirconia custom implant-supported fixed partial prosthesis: in silico analysis

Bastos

Bordin

Vasconcellos

et al. 2018

Rev. odontol. UNESP

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Introduction A better tension distribution on implants and abutments in implant-supported fixed partial prosthesis is essential in the rehabilitation of posterior mandible area. Objective: To evaluate the influence of cantilever position and implant connection in a zircônia custom implant-supported fixed partial prosthesis using the 3-D finite element method. Material and method: Four models were made based on tomographic slices of the posterior mandible with a zirconia custom three-fixed screw-retained partial prosthesis. The investigated factors of the in silico study were: cantilever position (mesial or distal) and implant connection (external hexagon or morse taper). 100 N vertical load to premolar and 300 N to molar were used to simulate the occlusal force in each model to evaluate the distribution of stresses in implants, abutments, screws and cortical and cancellous bone. Result: The external hexagon (EH) connection showed higher cortical compression stress when compared to the morse taper (MT). For both connections, the molar cantilever position had the highest cortical compression. The maximum stress peak concentration was located at the cervical bone in contact with the threads of the first implant. The prosthetic and abutment screws associated with the molar cantilevers showed the highest stress concentration, especially with the EH connection. Conclusion: Morse taper implant connetions associated with a mesial cantilever showed a more favorable treatment option for posterior mandible rehabilitation.

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The influence of the connection, length and diameter of an implant on bone biomechanics

Cited by 25 publications

References 82 publications

Influence of Abutment Collar Height and Implant Length on Stress Distribution in Single Crowns

Influence of Abutment Collar Height and Implant Length on Stress Distribution in Single Crowns

Total Deformation of Multiple Implant-Supported Prostheses through Three-Dimensional Finite Element Analysis

Influence of cantilever position and implant connection in a zirconia custom implant-supported fixed partial prosthesis: in silico analysis

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