Interaction effects among cortical bone, cancellous bone, and periodontal membrane of natural teeth and implants

Widera, G. E. O.; Tesk, John A.; Privitzer, Eberhardt

doi:10.1002/jbm.820100418

Cited by 43 publications

(14 citation statements)

References 5 publications

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“…The photoelastic approach has gradually given way to finite element analysis as the preferred full-field method for characterizing masticatory stresses in various tissues (Thresher and Saito, 1973;Widera et al, 1976;Knoell, 1977;Tanne et al, 1987Tanne et al, , 1995Andersen et al, 1991;Hart et al, 1992;Korioth et al, 1992;Meijer et al, 1993;Korioth and Versluis, 1997). Essentially, finite element modeling (FEM) is a mathematical approach to stress analysis which reduces the prohibitively complex task of describing states of stress in the whole mandible to a series of simpler tasks solved simultaneously.…”

Section: Finite Element Modelingmentioning

confidence: 99%

Experimental observation, theoretical models, and biomechanical inference in the study of mandibular form

Daegling

Hylander

2000

Am. J. Phys. Anthropol.

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Experimental studies and mathematical models are disparate approaches for inferring the stress and strain environment in mammalian jaws. Experimental designs offer accurate, although limited, characterization of biomechanical behavior, while mathematical approaches (finite element modeling in particular) offer unparalleled precision in depiction of strain magnitudes, directions, and gradients throughout the mandible. Because the empirical (experimental) and theoretical (mathematical) perspectives differ in their initial assumptions and their proximate goals, the two methods can yield divergent conclusions about how masticatory stresses are distributed in the dentary. These different sources of inference may, therefore, tangibly influence subsequent biological interpretation. In vitro observation of bone strain in primate mandibles under controlled loading conditions offers a test of finite element model predictions. Two issues which have been addressed by both finite element models and experimental approaches are: (1) the distribution of torsional shear strains in anthropoid jaws and (2) the dissipation of bite forces in the human alveolar process. Not surprisingly, the experimental data and mathematical models agree on some issues, but on others exhibit discordance. Achieving congruence between these methods is critical if the nature of the relationship of masticatory stress to mandibular form is to be intelligently assessed. A case study of functional/mechanical significance of gnathic morphology in the hominid genus Paranthropus offers insight into the potential benefit of combining theoretical and experimental approaches. Certain finite element analyses claim to have identified a biomechanical problem unrecognized in previous comparative work, which, in essence, is that the enlarged transverse dimensions of the postcanine corpus may have a less important role in resisting torsional stresses than previously thought. Experimental data have identified subperiosteal cortical thinning as a culprit in diminishing the role of cross-sectional geometry in conditioning the strain environment. These observations raise questions concerning the biomechanical significance of mandibular form in early hominids, fueling persistent arguments over whether gnathic morphology can be related to dietary specialization in the "robust" australopithecines. Nonmechanical explanations (e.g., tooth size or body size) for Paranthropus mandibular dimensions, however, are not compelling as competing hypotheses. Both theoretical and experimental models are in need of refinement before it is possible to conclude that the jaws of the "robust" australopithecines are not functionally linked to elevated masticatory loads.

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Section: Finite Element Modelingmentioning

confidence: 99%

Experimental observation, theoretical models, and biomechanical inference in the study of mandibular form

Daegling

Hylander

2000

Am. J. Phys. Anthropol.

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“…Most of these values, which are presented in Table I, [31][32][33][34][35][36][37][38][39][40][41] were determined according to a literature survey. The situation was different for the orthotropic material.…”

Section: Mesh Generation and Materials Properties (Pre-processing)mentioning

confidence: 99%

Stress distribution of inlay-anchored adhesive fixed partial dentures: A finite element analysis of the influence of restorative materials and abutment preparation design

Magne

Perakis

Belser

et al. 2002

The Journal of Prosthetic Dentistry

107

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THE JOURNAL OF PROSTHETIC DENTISTRY VOLUME 87 NUMBER 5have proven their clinical reliability in combination with the metal-ceramic technique. 1,2 The advent of metal-free restorative materials, however, has led to the use of indirect composite or ceramic fixed partial dentures (FPDs) as an alternative to conventional metal-ceramic AFPDs. Better bonding properties to composite cements, more appropriate biomechanical behavior, and enhanced esthetics are expected with the use of composite or ceramic compared to metal alloys. alternative to conventional metal-ceramic adhesive fixed partial dentures (AFPDs). Little information about the adequate restorative material and tooth preparation design for inlay-anchored AFPDs is available to the clinician.Purpose. The purposes of this simulation study were: (1) to use 2-dimensional finite element modeling to simulate stresses at the surface and interface of 3-unit posterior AFPDs made with 6 different restorative materials, and (2) to investigate the influence of 3 different abutment preparation configurations on the stress distribution within the tooth/restoration complex. Material and methods.A mesio-distal cross-section of a 3-unit AFPD was digitized and used to create 2-dimensional models of the periodontal membrane, supporting bone, different restorative materials (gold, alumina, zirconia, glass-ceramic, composite, and fiber-reinforced composite), and different abutment preparation configurations (interproximal slots vs. 2-surface [MO, DO] vs. 3-surface [MOD]). A simulated 50-N vertical occlusal load was applied to the standardized pontic element. The principal stress within the restorative materials, stresses at the tooth/restoration interface, and surface tangential stresses at the level of the pontic were calculated in MPa from the postprocessing files and compared to each other.Results. All materials and tooth preparation design exhibited a similar stress pattern, with a definite compressive area at the occlusal side of the pontic, a tensile zone at the gingival portion of the pontic, and tensile stress peaks in the abutment/pontic connection areas. Among isotropic materials, standard non-reinforced composites exhibited better stress transfer and reduced tensile stresses at the adhesive interface than ceramics and gold. Optimized placement of the glass fibers within the composite resulted in similar stress distribution when tested in 2-surface abutment preparation configuration. There was no detectable influence of preparation design on the behavior of the pontic area. Among all 3 preparation designs, only the DO design exhibited almost pure compression at the interface. Conclusion.

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“…Since bone tissue seems to respond to strains (Huiskes and Hollister, 1993), and strains are induced by stresses in adjacent structures such as dental implants, the advent of implantology brought the proliferation of FE analysis studies related to the effects of stresses created by dental implants on the surrounding bone (Kitoh et al, 1978;Takahashi et al, 1978;Weinstein et al, 1980;Cook et al, 1982a,b;Borchers and Reichart, 1983;Rieger et al, 1989;Siegele and Soltesz, 1989;El Charkawi et al, 1990;Rieger et al, 1990;Van Rossen et al, 1990;Mihalko et al, 1992;CIelland et al, 1991;Meijer et al, 1995 (1997) of changes in bone geometry on implant-derived stress distributions (Widera et al, 1976), a prediction that was corroborated in more recent studies (Borchers and Reichart, 1983;Clelland et al, 1993). These findings, in connection with histomorphometric ones, led to the application of more sophisticated FE analyses which combined the so-called global strain environment induced by implant loading with detailed, micromechanical strain predictions of the implant/bone interface (Ko et al, 1992b).…”

Section: (32) Orthodontic Modelsmentioning

confidence: 99%

Modeling the Mechanical Behavior of the Jaws and Their Related Structures By Finite Element (Fe) Analysis

Korioth

Versluis

1997

Critical Reviews in Oral Biology & Medicine

177

121

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In this paper, we provide a review of mechanical finite element analyses applied to the maxillary and/or mandibular bone with their associated natural and restored structures. It includes a description of the principles and the relevant variables involved, and their critical application to published finite element models ranging from three-dimensional reconstructions of the jaws to detailed investigations on the behavior of natural and restored teeth, as well as basic materials science. The survey revealed that many outstanding FE approaches related to natural and restored dental structures had already been done 10-20 years ago. Several three-dimensional mandibular models are currently available, but a more realistic correlation with physiological chewing and biting tasks is needed. Many FE models lack experimentally derived material properties, sensitivity analyses, or validation attempts, and yield too much significance to their predictive, quantitative outcome. A combination of direct validation and, most importantly, the complete assessment of methodical changes in all relevant variables involved in the modeled system probably indicates a good FE modeling approach. A numerical method for addressing mechanical problems is a powerful contemporary research tool. FE analyses can provide precise insight into the complex mechanical behavior of natural and restored craniofacial structures affected by three-dimensional stress fields which are still very difficult to assess otherwise.

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Interaction effects among cortical bone, cancellous bone, and periodontal membrane of natural teeth and implants

Cited by 43 publications

References 5 publications

Experimental observation, theoretical models, and biomechanical inference in the study of mandibular form

Experimental observation, theoretical models, and biomechanical inference in the study of mandibular form

Stress distribution of inlay-anchored adhesive fixed partial dentures: A finite element analysis of the influence of restorative materials and abutment preparation design

Modeling the Mechanical Behavior of the Jaws and Their Related Structures By Finite Element (Fe) Analysis

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