Anisotropic elasticity of cortical and cancellous bone in the posterior mandible increases peri‐implant stress and strain under oblique loading

O'Mahony, A; Williams, John L.; Spencer, Paulette

doi:10.1034/j.1600-0501.2001.120614.x

Cited by 188 publications

(137 citation statements)

References 32 publications

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“…Numerous other studies corroborate the anisotropic behaviour of bone, see some examples in Nordin and Frankel (2001), O'Mahony et al (2001), and Vercher et al (2014).…”

Section: Fe Assuming Anisotropic Behavioursupporting

confidence: 55%

A review on recent advances in numerical modelling of bone cutting

Marco

Rodríguez-Millán

Santiuste

et al. 2015

Journal of the Mechanical Behavior of Biomedical Materials

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“…Numerous other studies corroborate the anisotropic behaviour of bone, see some examples in Nordin and Frankel (2001), O'Mahony et al (2001), and Vercher et al (2014).…”

Section: Fe Assuming Anisotropic Behavioursupporting

confidence: 55%

A review on recent advances in numerical modelling of bone cutting

Marco

Rodríguez-Millán

Santiuste

et al. 2015

Journal of the Mechanical Behavior of Biomedical Materials

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“…The analysis was done in the linear elastic range with total adherence between the parts. A non-linear solution with contacts better mimics realistic behavior, however, the results strongly depend on mesh quality on contacting interfaces, as also frictional condition which is not congruent in studies [20,21]. In specific range an increase of the stress in bone tissue around the implants is influenced by anisotropic values of the bone [22], however, in most works because of the problems with orienting of the coordinating system around the alveolar processes are used linear isotropic models for bone tissues behavior [13,23].…”

Section: Discussionmentioning

confidence: 99%

Full Contoured Tooth-Implant Supported 3-Pointic All-Ceramic Denture During Occlusal Load Transfer in Lateral Region

Żmudzki¹,

Malara²,

Chladek³

2016

Archives of Metallurgy and Materials

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Implant and a tooth supported dentures are avoided by dentists because of uneven distribution of occlusal loads between a stiffer implant and a more pliable tooth. The hypothesis was that a 3-point all-ceramic bridge supported on a natural second premolar tooth and a two-pieces typical implant bears safely mastication loads. The finite element analysis showed that the implant splinted by all-ceramic zirconium bridge with the second premolar was safe under lateral mastication load, but there was found an overload at wide zone of bone tissue around the implant under the load of 800 N. The patients can safely masticate, but comminution of hard food should be avoided and they should be instructed that after such an indiscretion they need to contact a dental professional, because, in spite of integrity of the prosthesis, the bone tissue around the implant may fail and there is a hazard of intrusion of the tooth.

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“…Indeed, the thickness of the cortical bone is not the same everywhere in the mandible. It has been shown that the elastic properties of bones are anisotropic [39][40]. However, elasticity is often considered as isotropic in the FE model of implants in the mandible [41][42][43][44], and it has been shown that the impact of anisotropy on the stress state into a bone is limited, with a maximal difference lower than 10 % [45].…”

Section: Bone Materials Characteristicsmentioning

confidence: 99%

Interaction of bone–dental implant with new ultra low modulus alloy using a numerical approach

Piotrowski

Baptista²,

Patoor

et al. 2014

Materials Science and Engineering: C

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Although mechanical stress is known as being a significant factor in bone remodeling, most implants are still made using materials that have a higher elastic stiffness than that of bones.Load transfer between the implant and the surrounding bones is much detrimental, and osteoporosis is often a consequence of such mechanical mismatch. The concept of mechanical biocompatibility has now been considered for more than a decade. However, it is limited by the choice of materials, mainly Ti-based alloys whose elastic properties are still too far from cortical bone. We have suggested using a bulk material in relation with the development of a new beta titanium-based alloy. Titanium is a much suitable biocompatible metal, and betatitanium alloys such as metastable TiNb exhibit a very low apparent elastic modulus related to the presence of an orthorhombic martensite. The purpose of the present work has been to investigate the interaction that occurs between the dental implants and the cortical bone. 3D finite element models have been adopted to analyze the behaviour of the bone-implant system depending on the elastic properties of the implant, different types of implant geometry, friction force, and loading condition. The geometry of the bone has been adopted from a mandibular incisor and the surrounding bone. Occlusal static forces have been applied to the implants, and their effects on the bone-metal implant interface region have been assessed and 2 compared with a cortical bone/ bone implant configuration. This work has shown that the low modulus implant induces a stress distribution closer to the actual physiological phenomenon, together with a better stress jump along the bone implant interface, regardless of the implant design.Keywords: Dental biomechanics, Beta titanium alloy, Low modulus implant, Numerical modelling, Bone-implant interface IntroductionOver the last few decades, considerable progress in dental implantology has been made, with success rates exceeding 95% [1]. Implant stability is commonly considered as playing a major role in a successful osseointegration. Obtaining post-operative osseointegration is necessary in order to establish a solid and durable connection between the implant and the osseous structure. In agreement with the Wolff law, a process of osseous remodelling adapted to the stress level occurs after implantation [2][3][4]. This process is controlled by mechanical loads.When the occlusal forces induced on the bone exceed a physiological level, bone resorption can occur, with possible failure [5]. More importantly, the long-term performance of an implant is known to be strongly dependent on the bone tissue interaction [6]. The strain state which takes place at the interface between the bone and implant controls the bone tissue remodelling mechanisms [7]. Bone resorption is associated with a low strain state, and bone necrosis occurs when strain exceeds the maximum level.Evaluation of the risk requires a comprehension of the load transfer along the bone-dental implant interface. T...

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Anisotropic elasticity of cortical and cancellous bone in the posterior mandible increases peri‐implant stress and strain under oblique loading

Cited by 188 publications

References 32 publications

A review on recent advances in numerical modelling of bone cutting

A review on recent advances in numerical modelling of bone cutting

Full Contoured Tooth-Implant Supported 3-Pointic All-Ceramic Denture During Occlusal Load Transfer in Lateral Region

Interaction of bone–dental implant with new ultra low modulus alloy using a numerical approach

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