A jaw model for the study of the mandibular flexure taking into account the anisotropy of the bone

Álvarez-Arenal, Ángel; Lasheras, Fernando Sánchez; Fernández, Elena Martín; González, Ignacio González

doi:10.1016/j.mcm.2008.12.029

Cited by 17 publications

(13 citation statements)

References 29 publications

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“…Differences in elastic mechanical properties between relative positions, alveolar and basal, were present mainly among the control specimens rather than in the regenerate cortical bone. This finding in the control bone could be due to bone adaptations to normal functional patterns of mandibular loading, inertia at the cross section, and the average direction of flexion load, which produces compressive stresses at the basal cortical bone and tensile stresses at the alveolar cortical bone (Alvarez‐Arenal et al , 2009). Alternately, lower chewing forces on the regenerate side, due to the animal favouring the unoperated side, and the stress‐shielding effect from the reconstruction plate could also result in overall reduced cortical bone formation in the regenerate.…”

Section: Discussionmentioning

confidence: 99%

Biomechanical characteristics of regenerated cortical bone in the canine mandible

Zapata

Opperman

Kontogiorgos

et al. 2011

J Tissue Eng Regen Med

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To test the mechanical properties of regenerate cortical bone created using Mandibular Bone Transport (MBT) distraction, five adult male American foxhound dogs underwent unilateral distraction of the mandible with a novel MBT device placed to linearly repair a 30-35 mm bone defect. The animals were sacrificed 12 weeks after the beginning of the consolidation period. Fourteen cylindrical specimens were taken from the inner (lingual) and outer (buccal) plates of the reconstructed mandible and 21 control specimens were removed from the contralateral aspect of the mandible. The mechanical properties of the 35 cylindrical cortical bone specimens were assessed by using a non-destructive pulse ultrasound technique. Results showed that all of the cortical mechanical properties exhibit higher numerical values on the control side than the MBT regenerate side. In addition, both densities and the elastic moduli in the direction of maximum stiffness of the regenerate cortical bone specimens are higher on the lingual side than the buccal side. Interestingly, there is no statistical difference between elastic modulus (E 1 and E 2 ) in orthogonal directions throughout the 35 cortical specimens. The data suggest that the regenerate canine cortical bone is not only heterogeneous, but the elastic mechanical properties tend to approximate transverse isotropy at a tissue level as opposed to control cortical bone that is orthotropic. In addition, the elastic mechanical properties are not only higher on the control side but also in the lingual anatomical position, suggesting a stress shielding effect from the presence of the reconstruction plate.

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Section: Discussionmentioning

confidence: 99%

Biomechanical characteristics of regenerated cortical bone in the canine mandible

Zapata

Opperman

Kontogiorgos

et al. 2011

J Tissue Eng Regen Med

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“…Additional data that emerged from the study of Alvarez-Arenal et al [ 11 ], who measured the flexion by a finite element analysis, were that while opening the mouth the flexion was most significant in the condyles, followed by the body of the mandible, and least significant in the symphyseal area which was actually the most stable area. In addition, during protrusion it was found that the flexion was mainly significant at the angle of the mandible [ 11 ].…”

Section: Resultsmentioning

confidence: 99%

“…Similarly, lower values of mandibular flexion can be observed during lateral movements, in which only one muscle (lateral pterygoid) is active as opposed to protrusion in which both muscles are active at the same time. In addition, during retrusion movements an increase in the arch of the mandible has been recorded [ 11 , 35 , 37 , 41 , 42 , 43 ].…”

Section: Resultsmentioning

confidence: 99%

“…The length of the entire mandibular structure has a direct effect on the level of mandibular flexure (flexion is greater when the mandibular structure is longer), while the short length of the symphysis structure also has a direct effect on the level of mandibular flexure (flexion is greater when the symphysis structure is shorter). In addition, a small gonial angle was found to have a reduced but statistically proven effect on the level of mandibular flexion (the smaller the angle, the more significant the flexion) [ 2 , 8 , 9 , 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Clinical Influence of Mandibular Flexure on Oral Rehabilitation: Narrative Review

Mijiritsky

Shacham

Meilik

et al. 2022

IJERPH

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Aim: The current paper aims to review mandibular flexure and its clinical implications in the field of oral rehabilitation. Mandibular flexure is a deformity of the mandible, which occurs during jaw movements. Methods and Materials: An electronic database search was conducted using the PRISM model, with a total of 49 articles included. Results: Mandibular flexure affects various stages of oral rehabilitation treatments. Effects of mandibular flexure are more significant in periodontal patients, and in implant-supported restorations, compared to natural teeth, due to differences in the force absorption by the periodontal ligament. Various adjustments must be made to the prosthodontic framework to enable long-term survival of the restorative treatments. Conclusions: Dental practitioners should pay attention to the following: (1) digital impressions are preferred over conventional; (2) mouth opening should be kept to a minimum (as possible, up to 10–20 mm) while also avoiding any anterior movements of the mandible (protrusion); (3) the number of abutment teeth should be kept to a minimum; (4) structures in the lower jaw should be splitted; (5) non-rigid connectors should be used to reduce the effort exerted; (6) in periodontal patients, the preference is for short-span restorations and non-rigid connectors; (7) in implant-supported restorations, it is preferable to divide the framework into two or three segments, utilizing rigid materials with a low elastic modulus. There is no agreement in the literature about the preferred location of the implants in the jaw.

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“…Research has focused more on the mandible than the maxilla, and a great deal of it has been directed towards explaining biomechanics in the normal jaw. Some recent examples include strain distributions between alveolar and mid‐corporeal buccal and lingual cortical bone (108), mandibular stiffness and its relationship to the chin (109, 110), as well as mandibular flexure and distortion during tooth‐clenching (61, 111).…”

Section: Craniomandibular Modelsmentioning

confidence: 99%

Current computational modelling trends in craniomandibular biomechanics and their clinical implications

Hannam

2010

Journal of Oral Rehabilitation

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Computational models of interactions in the craniomandibular apparatus are used with increasing frequency to study biomechanics in normal and abnormal masticatory systems. Methods and assumptions in these models can be difficult to assess by those unfamiliar with current practices in this field; health professionals are often faced with evaluating the appropriateness, validity and significance of models which are perhaps more familiar to the engineering community. This selective review offers a foundation for assessing the strength and implications of a craniomandibular modelling study. It explores different models used in general science and engineering and focuses on current best practices in biomechanics. The problem of validation is considered at some length, because this is not always fully realisable in living subjects. Rigid-body, finite element and combined approaches are discussed, with examples of their application to basic and clinically relevant problems. Some advanced software platforms currently available for modelling craniomandibular systems are mentioned. Recent studies of the face, masticatory muscles, tongue, craniomandibular skeleton, temporomandibular joint, dentition and dental implants are reviewed, and the significance of non-linear and non-isotropic material properties is emphasised. The unique challenges in clinical application are discussed, and the review concludes by posing some questions which one might reasonably expect to find answered in plausible modelling studies of the masticatory apparatus.

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A jaw model for the study of the mandibular flexure taking into account the anisotropy of the bone

Cited by 17 publications

References 29 publications

Biomechanical characteristics of regenerated cortical bone in the canine mandible

Biomechanical characteristics of regenerated cortical bone in the canine mandible

Clinical Influence of Mandibular Flexure on Oral Rehabilitation: Narrative Review

Current computational modelling trends in craniomandibular biomechanics and their clinical implications

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