Finite element stress analysis of cuneiform and cylindrical threaded implant geometries

Cruz, Mauro; Lourenço, Adelino Francisco; Toledo, Elson Magalhães; Barra, Luis Paulo da Silva; Lemonge, Afonso C. C.; Wassall, Thomaz

doi:10.3233/thc-2006-144-523

Cited by 19 publications

(11 citation statements)

References 34 publications

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“…Total bonding between bone and implants was assumed to simulate a complete implant osseointegration so that no motion between the two structures occurs under applied loading (Cruz et al, 2003(Cruz et al, , 2006(Cruz et al, , 2009. To reproduce a clinical situation, contact was applied at the overdenture-mucosa interface and between parts of the attachments (Daas et al, 2008).…”

Section: Materials Properties and Interface Conditionsmentioning

confidence: 99%

“…The models were supported by the masticatory muscles and temporomandibular joints. The forces created by the elevator masticatory muscles (temporal, masseter, medial pterygoid and lateral pterygoid) and their positioning on the mandibular body were based on previous studies (Cruz et al, 2003(Cruz et al, , 2006(Cruz et al, , 2009 ( Fig. 4).…”

Section: Constrains and Loading Conditionsmentioning

confidence: 99%

“…4. Boundary conditions of the mandible FE model used in all groups based on Cruz et al (2003Cruz et al ( , 2006Cruz et al ( , 2009 Black arrows indicate the direction of the applied masticatory muscle forces (T -temporal; LP -Lateral Pterygoid; MP -Medial Pterygoid and M -Masseter). Green triangles show the fixation of the temporomandibular joints.…”

Section: Gold Alloymentioning

confidence: 99%

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Comparison of different designs of implant-retained overdentures and fixed full-arch implant-supported prosthesis on stress distribution in edentulous mandible – A computed tomography-based three-dimensional finite element analysis

Barão

Délben

Lima³

et al. 2013

Journal of Biomechanics

105

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A finite element analysis was used to compare the effect of different designs of implant-retained overdentures and fixed full-arch implant-supported prosthesis on stress distribution in edentulous mandible. Four models of an human mandible were constructed. In the OR (O'ring) group, the mandible was restored with an overdenture retained by four unsplinted implants with O'ring attachment; in the BC (bar-clip) -C and BC groups, the mandibles were restored with overdentures retained by four splinted implants with bar-clip anchor associated or not with two distally placed cantilevers, respectively; in the FD (fixed denture) group, the mandible was restored with a fixed full-arch four-implant-supported prosthesis. Models were supported by the masticatory muscles and temporomandibular joints. A 100-N oblique load was applied on the left first molar. Von Mises (σvM), maximum (σmax) and minimum (σmin) principal stresses (in MPa) analyses were obtained. BC-C group exhibited the highest stress values (σvM=398.8, σmax=580.5 and σmin=-455.2) while FD group showed the lowest one (σvM=128.9, σmax=185.9 and σmin=-172.1). Within overdenture groups, the use of unsplinted implants reduced the stress level in the implant/prosthetic components (59.4% for σvM, 66.2% for σmax and 57.7% for σmin versus BC-C group) and supporting tissues (maximum stress reduction of 72% and 79.5% for σmax, and 15.7% and 85.7% for σmin on the cortical and trabecular bones, respectively). Cortical bone exhibited greater stress concentration than the trabecular bone for all groups. The use of fixed implant dentures and removable dentures retained by unsplinted implants to rehabilitate edentulous mandible reduced the stresses in the periimplant bone tissue, mucosa and implant/prosthetic components.

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Section: Materials Properties and Interface Conditionsmentioning

confidence: 99%

Section: Constrains and Loading Conditionsmentioning

confidence: 99%

Section: Gold Alloymentioning

confidence: 99%

See 1 more Smart Citation

Comparison of different designs of implant-retained overdentures and fixed full-arch implant-supported prosthesis on stress distribution in edentulous mandible – A computed tomography-based three-dimensional finite element analysis

Barão

Délben

Lima³

et al. 2013

Journal of Biomechanics

105

View full text Add to dashboard Cite

show abstract

“…Cruz et al . [ 29 ] using FEA reported that there is no significant difference in stress distribution between conical and cylindrical dental implants. However, other investigations by FEA method showed superiority of tapered implants in stress reduction and transmission compared to parallel implants.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of crestal bone resorption around cylindrical and conical implants following 6 months of loading: A randomized clinical trial

2017

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Objective:The purpose of this clinical study was to evaluate the effect of implant body form (cylindrical and conical implants) on crestal bone levels during 6 months’ follow-up after loading.Materials and Methods:A total of 32 SPI implants (19 conical implants/13 cylindrical implants) were randomly placed in 12 male patients using a submerged approach. None of the patients had compromising medical conditions or parafunctional habits. Periapical radiographs using the parallel technique were taken after clinical loading and 6 months later. Clinical indices including pocket depth and bleeding on probing (BOP) were recorded on 6-month follow-up. Data were analyzed by independent samples t-test and Chi-square test with a significance level of 0.05.Results:Six months after loading, crestal bone loss was 0.84 (±0.29) mm around the cylindrical implants and 0.73 (±0.62) mm around the conical types, which was not significantly different (P = 0.54). Pocket depth around the cylindrical and conical implants was 2.61 (±0.45) mm and 2.36 (±0.44) mm, respectively (P = 0.13). BOP was observed among 53.8% and 47.4% of the cylindrical implants and conical (P = 0.13). Bone loss and pocket depth in the maxilla and mandible had no significant difference (P = 0.46 and P = 0.09, respectively).Conclusion:In this study, although bone loss and clinical parameters were slightly higher in the cylindrical implants, there was no significant difference between the conical- and cylindrical-shaped implants.

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“…Von Mises stress images are used to visualize Von Mises stress field patterns, which represent a scalar field quantity obtained from the volume distortion energy density and are used to measure the state of stress. Stresses are color coded, ranging from blue (the lowest) to green, yellow, orange, and red (the highest) .…”

Section: Methodsmentioning

confidence: 99%

Biomechanical comparison of effects of the Dynesys and Coflex dynamic stabilization systems on range of motion and loading characteristics in the lumbar spine: a finite element study

Kulduk

Altun

Şenköylü

2015

Robotics Computer Surgery

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Finite element stress analysis of cuneiform and cylindrical threaded implant geometries

Cited by 19 publications

References 34 publications

Comparison of different designs of implant-retained overdentures and fixed full-arch implant-supported prosthesis on stress distribution in edentulous mandible – A computed tomography-based three-dimensional finite element analysis

Comparison of different designs of implant-retained overdentures and fixed full-arch implant-supported prosthesis on stress distribution in edentulous mandible – A computed tomography-based three-dimensional finite element analysis

Evaluation of crestal bone resorption around cylindrical and conical implants following 6 months of loading: A randomized clinical trial

Biomechanical comparison of effects of the Dynesys and Coflex dynamic stabilization systems on range of motion and loading characteristics in the lumbar spine: a finite element study

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