Mechanical properties of trabecular bone in the human mandible: Implications for dental implant treatment planning and surgical placement

Misch, Carl E.; Qu, Zhimin; Bidez, Martha Warren

doi:10.1016/s0278-2391(99)90437-8

Cited by 398 publications

(238 citation statements)

References 22 publications

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“…In models ''with PDL,'' the same material properties as for the TMJ soft tissue were assigned. In most models (models 3-13), the cancellous bone tissue material had values of E ¼ 56 MPa and m ¼ 0.3 based on measurements of cancellous bone tissue in the human mandibular corpus (Misch et al, 1999), but in two models (models 1 and 2) E was 560 MPa, which is more similar to measured values in the human mandibular condyles (Giesen et al, 2001). We did not perform a validation against experimental data for this particular model, but did so for a similar voxel-based FE model of another human mandible with isotropic and homogenous material properties (Gr€ oning et al, 2009, in press).…”

Section: Methodsmentioning

confidence: 64%

Modeling the Human Mandible Under Masticatory Loads: Which Input Variables are Important?

Gröning

Fagan

O’Higgins

2012

The Anatomical Record

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Finite element analyses (FEA) that have simulated masticatory loadings of the human mandible differ significantly with regard to their basic input variables such as material properties, constraints, and applied forces. With sensitivity analyses it is possible to assess how the choice of different input values and the degree of model simplification affect FEA results. However, published FEA studies are rarely accompanied by sensitivity analyses so that the robusticity of their results is impossible to assess. Here, we conduct a sensitivity analysis with an FE model of a human mandible to quantify the relative importance of several modeling decisions: (1) the material properties assigned to the cancellous bone tissue; (2) the inclusion or not of the periodontal ligament; (3) the constraints at the joints and bite point; and (4) the orientation of applied muscle forces. We study the effects of varying these properties by analysing the strain magnitudes and directions across the model surface. In addition, we perform a geometric morphometric analysis of the deformation resulting from the loading of each model. The results show that the effects of altering the different model properties can be significant and that most effects are potentially large enough to cause problems for the biological interpretation of FEA results. We therefore recommend that researchers conduct more sensitivity analyses than at present to assess the robusticity of their FEA results and their biological conclusions. Anat Rec,

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Section: Methodsmentioning

confidence: 64%

Modeling the Human Mandible Under Masticatory Loads: Which Input Variables are Important?

Gröning

Fagan

O’Higgins

2012

The Anatomical Record

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“…Hounsfield value for alveolar bone in the human jaw ranges from >0 and 850> Hounsfield [17,18]. The bone formation was consistent regardless of gender, age, age group or the diameter of the implant the graft was placed around.…”

Section: Results and Findingsmentioning

confidence: 91%

Bone Forming Potential of An-Organic Bovine Bone Graft: A Cone Beam CT study

Uzbek¹

2014

JCDR

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“…This proposal is compatible with the different bone densities reported in previous studies for different sites in humans. 16,28 Nevertheless, Table 2. Indication of MI' length to be used in different sites in the maxilla and mandible, based on the cortical bone thickness.…”

Section: Discussionmentioning

confidence: 99%

“…Bone quality usually varies according to the site in the arch; however, in the anterior region, bone density is greater than that in the median and posterior regions. 16 The stability of MIs is greater when cortical bone thickness is > 1 mm, 5 but is unaffected by bone density when cortical bone thickness is 1 mm. 14 Many variables can affect the stability of MIs.…”

Section: Declaration Of Interestsmentioning

confidence: 98%

Influence of cortical thickness on the stability of mini-implants with microthreads

et al. 2015

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The objective of this study was to assess the influence of cortical thickness and bone density on the insertion torque of a mini-implant (MI) with microthreads. Mini-implants with lengths of 6 and 8 mm in the active part were inserted into synthetic bone blocks (polyurethane resin). The density of these blocks was 20 pounds per cubic foot (pcf), simulating bone marrow, and that of blocks 1, 2, and 3-mm-thick blocks was 40 pcf, simulating cortical bone. Blocks with uniform density of 40 pcf were also used to simulate bone areas of greater density. Insertion torque was quantified with a universal testing machine (EMIC). For both MIs, increasing insertion torque was associated with increasing cortical bone thickness. For the same MI length, significant differences were observed among all assessed groups. The insertion torque of the 6-mm-long MI inserted in a 3-mm-thick cortical bone was equivalent to that of the 8-mm-long MI inserted in a 1-mm-thick cortical bone. MIs inserted in bone blocks of greater density presented insertion torque values almost twice as high as those in other groups. The shorter MI, the lower the insertion torque, and the greater the cortical bone thickness, the greater the insertion torque. To minimize fracture risk, the size of MI should be selected according to the insertion site.

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Mechanical properties of trabecular bone in the human mandible: Implications for dental implant treatment planning and surgical placement

Cited by 398 publications

References 22 publications

Modeling the Human Mandible Under Masticatory Loads: Which Input Variables are Important?

Modeling the Human Mandible Under Masticatory Loads: Which Input Variables are Important?

Bone Forming Potential of An-Organic Bovine Bone Graft: A Cone Beam CT study

Influence of cortical thickness on the stability of mini-implants with microthreads

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