Stress distribution in dental prosthesis under an occlusal combined dynamic loading

Merdji, Ali; Bouiadjra, B. Bachir; Chikh, B. Ould; Mootanah, Rajshree; Aminallah, L.; Sérier, B.; Muslih, Iyad M.

doi:10.1016/j.matdes.2011.12.006

Cited by 45 publications

(38 citation statements)

References 22 publications

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“…Overload can lead to bone resorption or fatigue failure of the implant, whereas, under loading of the bone may cause disuse atrophy and subsequent bone loss. In most FEA models, the bone-implant interface was assumed to be perfect, simulating 100% osseointegration [9]. The generation of high stress distribution or concentration in the bone should be avoided to achieve stable osteointegration for implant restoration.…”

Section: Resultsmentioning

confidence: 99%

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Stress Distribution in Implant Retained Finger Prosthesis: A Finite Element Study

Amornvit

Rokaya

Keawcharoen

et al. 2013

JCDR

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Background: Finger amputation may result from congenital cause, trauma, infection and tumours. The finger amputation may be rehabilitated with dental implant-retained finger prosthesis. The success of implant-retained finger prosthesis is determined by the implant loading. The type of the force is a determining factor in implant loading.Objective: To evaluate stress distributions in finger bone when the loading force is applied along the long axis of the implant using finite element analysis. Method:The finite element models were created. The finger bone model containing cortical bone and cancellous bone was constructed by using radiograph. Astra Tech Osseo Speed bone level implant of 4.5 mm diameter and 14 mm length was selected.The force was applied to the top of the abutment along the long axis of the implant.Results: Finite element analysis indicated that the maximum stress was located at the head of abutment screw. The minimum stress was located in the apical third of the implant fixture. The weakest point was calculated by safety factor which is located in the spongy bone at apical third of the fixtures. Finally, 4.9 times yield stress of spongy bone was needed for the deformation of the spongy bone. Conclusion:Finite element study showed that when the force was applied along the long axis of the implant, the maximum stress was located around the neck of the implant and the cortex bone received more stress than cancellous bone. So, to achieve long term success, the designers of implant systems must confront biomaterial and biomechanical problems including in vivo forces on implants, load transmission to the interface and interfacial tissue response. InTROduCTIOnFingers have an important role in the function and aesthetics. Finger amputation may result from congenital cause, trauma, infection and tumours. The loss of a finger leads to functional and psychological problems. The finger amputation may be rehabilitated with dental implant-retained finger prosthesis. The biomechanical behavior of implant-retained finger prosthesis systems including the reliability and the stability of the implant-abutment and implant bone interface plays an important role in its functional longevity inside the boneThe structure of dental implant is directly connected with a bone that would cause the non-uniform stress pattern of bone and might induce biomechanical overloading failures in implant and bone [2]. The success of implant-retained finger prosthesis is determined by the implant loading, consequently, which leads to the bone loss around the implant. The characteristic of the force is a determining factor in implant loading. This overloading would cause the microdamage accumulation at bone and results in bone loss around the neck of the implant [3]. Furthermore, it is reported that the initiated loss of bone mostly around implant neck evolves deeper into the bone [4,5]. Finite element analyses (FEA) of stressand strain fields have indicated that stress concentration occurring exclusively in the cortical bone near...

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Section: Resultsmentioning

confidence: 99%

“…Therefore, it is valuable to investigate the stress/strains in bone and their relation to different parameters of implant and bone. The optimization of the contact area between the bone and the implant can be an important factor in increasing the durability of the prosthesis [9].…”

Section: Discussionmentioning

confidence: 99%

Stress Distribution in Implant Retained Finger Prosthesis: A Finite Element Study

Amornvit

Rokaya

Keawcharoen

et al. 2013

JCDR

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“…The geometric modeling of the completely dentate mandible, however, is not a trivial task when one requires biological structures of high geometrical similarity, such as detailed tooth crowns and roots, the periodontal ligament, the temporomandibular joint, and articular cartilage. As a result, most previous studies utilized simplified mandibular models without refined biological structures [20,21]. Furthermore, the determination of appropriate boundary conditions is as critical as the recreation of precise geometry for finite element model validation.…”

Section: Discussionmentioning

confidence: 99%

Effect of orthotropic material on finite element modeling of completely dentate mandible

et al. 2015

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“…16 Although this model was not made of a cancellous bone, its modulus of elasticity was 2 GPa, which was close to the cancellous modulus of elasticity that is around 1.4 GPa. 18 This difference is less notable when compared with the cortical bone elasticity modulus (14 GPa). 18 Although no abutments were attached to the implants, it was reported that during the axial loading, the load transfer was very similar to these two cases, but only when an axial load was applied.…”

Section: Experimental Partmentioning

confidence: 96%

“…18 This difference is less notable when compared with the cortical bone elasticity modulus (14 GPa). 18 Although no abutments were attached to the implants, it was reported that during the axial loading, the load transfer was very similar to these two cases, but only when an axial load was applied. 15 The acquired results lead to the same conclusion.…”

Section: Experimental Partmentioning

confidence: 96%

Experimental analysis of dental-implant load transfer in polymethyl-methacrylate blocks

Šarac¹,

Mitrović²,

Tanasić³

et al. 2019

Mater. Tehnol.

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Dental-implant overload can cause bone resorption. Load-transfer characteristics of dental implants are affected by their macro-design parameters. The goal of this study was to experimentally analyse the load-transfer characteristics of different dental implants, using polymethyl-methacrylate blocks. Three polymethyl-methacrylate blocks were created, with dimensions of (68 × 25 × 9) mm. Three dental implants, Nobel ø3.5 mm × 15 mm, Strauman ø4.1 mm × 10 mm and Strauman ø4.8 mm × 12 mm, were placed in separate blocks. The samples were supported by a three-point-bending set-up and loaded with an axial force of 600 N. The 3D digital image correlation method was employed for strain and displacement measurements. The highest displacement and von Mises strain values were found for Strauman ø4.1 mm × 10 mm (p < 0.05), 0.186 mm and 0.596 %, respectively. The sample of Nobel ø3.5 mm × 15 mm showed the lowest strain values. The sample of Strauman ø4.8 mm × 12 mm (p > 0.05) had similar strain values as Nobel ø3.5 mm × 15 mm. The load transfer during axial loading was primarily affected by the size of the implant contact surface. The displacement and strain values in the implant vicinity may provide an insight into the effect of dental-implant design on the load transfer. Keywords: dental implant, digital image correlation, polymethyl-methacrylate, load transfer Preobremenitev zobnih vsadkov lahko povzro~i resorpcijo kosti. Zaradi prenosa obremenitve je karakteristika zobnih vsadkov odvisna od njihovih mikroparametrov oblikovanja. Cilj predstavljene {tudije je bila eksperimentalna analiza karakteristik prenosa obremenitve razli~nih zobnih vsadkov z uporabo polimetil-metakrilatnih blokov. Avtorji so izdelali tri polimetil-metakrilatne bloke dimenzij (68 × 25 × 9) mm. Tri dentalne vsadke, Nobel ø3,5 × 15 mm, Strauman ø4,1 × 10 mm in Strauman ø4,8 × 12 mm, so namestili v posamezne bloke. Vzorce so nato podprli s trito~kovno upogibno napravo in jih obremenili z osno silo 600 N. Za merjenje deformacije in pomikov so uporabili 3D digitalno slikovno korelacijo. Najve~ji odmik in von Misesovo deformacijo so izmerili pri vsadku Strauman ø4,1 × 10 mm (p < 0,05), 0,186 mm in 0,596 %. Pri vzorcu Nobel ø3,5 × 15 mm so ugotovili najmanj{e deformacije. Vzorec Strauman ø4,8 × 12 mm (p > 0,05) je imel podobne vrednosti deformacije kot Nobel ø3,5 × 15 mm. Prenos obremenitve med osnim obremenjevanjem je bil odvisen predvsem od velikosti kontaktne povr{ine vsadka. Premiki in deformacije v bli`ini vsadkov lahko zagotavljajo vpogled v oblikovanje zobnih vsadkov glede na prenos obremenitve. Klju~ne besede: zobni vsadki, korelacija z digitalno sliko, polimetil-metakrilat, prenos obremenitve

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Stress distribution in dental prosthesis under an occlusal combined dynamic loading

Cited by 45 publications

References 22 publications

Stress Distribution in Implant Retained Finger Prosthesis: A Finite Element Study

Stress Distribution in Implant Retained Finger Prosthesis: A Finite Element Study

Effect of orthotropic material on finite element modeling of completely dentate mandible

Experimental analysis of dental-implant load transfer in polymethyl-methacrylate blocks

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