Stress distribution and displacement analysis during an intermaxillary disjunction—A three-dimensional FEM study of a human skull

Boryor, Andrew; Geiger, Martin; Hohmann, Ansgar; Wunderlich, Arthur; Sander, Christian; Sander, Franz Martin

doi:10.1016/j.jbiomech.2007.08.016

Cited by 61 publications

(39 citation statements)

References 16 publications

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“…[4][5][6] This involvement has been hypothesized following investigations based on histologic methods, 7,8 radiologic imaging, photoelastic models, 7,9 bone scintigraphy, 10 and finite element analysis. [11][12][13][14][15][16][17][18] Histologic studies on animals demonstrated a sign of increased cellular activity at suture level and immature bony tissue depositing along the suture borders. 7,8 Scintigraphic investigation showed a statistically significant increase in metabolic activity around the maxillary, zygomatic, sphenoid, and nasal bones and midpalatal sutures.…”

Section: Introductionmentioning

confidence: 99%

“…7,8 Scintigraphic investigation showed a statistically significant increase in metabolic activity around the maxillary, zygomatic, sphenoid, and nasal bones and midpalatal sutures. 10 Finite element analysis studies on the effect of RME associated, or not, with maxillary protraction [13][14][15][16][17][18][19] found signs of high stress around the circumaxillary sutures.…”

Section: Introductionmentioning

confidence: 99%

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Early post-treatment changes of circumaxillary sutures in young patients treated with rapid maxillary expansion

Leonardi¹,

Sicurezza²,

Cutrera³

et al. 2011

The Angle Orthodontist

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Objective: To test the null hypothesis that circumaxillary sutures do not show bony displacement in response to rapid maxillary expansion (RME) therapy. Materials and Methods: Subjects consisted of eight growing patients (two male and six female) with Angle Class I malocclusion, bilateral posterior crossbite, transverse maxillary deficiency, deep palatal vault, and dental crowding at the start of the treatment. A Hyrax palatal expander was used for each patient, and activation protocol required the screw to be turned three times per day (0.25 mm per turn) for an average of 18 days for all subjects. Multislice computed tomography (CT) scans were performed before rapid palatal expansion (time T0) and again at the end of the active expansion phase (time T1) without removing the expander. Measurements were carried out directly on the CT image using the OsiriX Imaging software program. Data were analyzed statistically by using the Wilcoxon signed rank test. Results: All linear measurements showed an increase between T0 and T1 and RME determined a widening of suture; however, sutures far from the maxilla showed a smaller degree of disarticulation. Conclusions: The hypothesis is rejected. Early treatment with RME produced a significant bony displacement by circumaxillary suture opening. The amount of changes of sutures depends on different factors relating to the subjects and varies between different sutures, showing that sutures that articulate directly with the maxilla face a greater influence by the RME compared with those located further away. (Angle Orthod. 2011;81:36-41.)

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Early post-treatment changes of circumaxillary sutures in young patients treated with rapid maxillary expansion

Leonardi¹,

Sicurezza²,

Cutrera³

et al. 2011

The Angle Orthodontist

View full text Add to dashboard Cite

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“…5 Studies on the effects of RME on the spheno-occipital synchondrosis have dealt most often with experimental models based on finite element analyses (FEM). [5][6][7][8][9][10][11] Just two studies, one on an animal model 12 and the other on human subjects using a bone scintigraphic method, have demonstrated an opening of the spheno-occipital synchondrosis and a significant increase in metabolic activity in the area of the spheno-occipital synchondrosis following the application of RME. 13 Findings from these studies pointed out the involvement of the spheno-occipital synchondrosis following RME application.…”

Section: Introductionmentioning

confidence: 99%

Rapid Maxillary Expansion Affects the Spheno-occipital Synchondrosis in Youngsters

Leonardi

Cutrera

Barbato

2010

The Angle Orthodontist

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Objective: To test the null hypothesis that the spheno-occipital synchondrosis does not show bony displacement in response to rapid maxillary expansion (RME) therapy in youngsters. Materials and Methods: A total of 16 computed tomography (CT) records were taken from 8 growing patients (2 males and 6 females), before (T0) and after (T1) treatment with RME. All patients had been diagnosed originally with transverse maxillary deficiency. The mean chronological age of the patients was 9.8 Ϯ 1.8 years (range, 8 to 11.4 years). High-resolution multislice multidetector CT was used to study quantitatively the extent of the opening of the spheno-occipital synchondrosis following RME. A low-dose CT scan protocol was used (80 kV, 10 mA) and the data file of each patient was transferred to a workstation where the anteroposterior width of the spheno-occipital synchondrosis was measured on axial images. Results: Before treatment with RME (T0), the anteroposterior mean width of the spheno-occipital synchondrosis was 1.73 Ϯ 0.46 mm immediately after the active phase of expansion (T1), and the width of the synchondrosis increased to 2.30 Ϯ 0.47. This difference was statistically significant according to the Wilcoxon signed rank test (P Ͻ .05). Conclusion: Rapid maxillary expansion leads to a small immediate widening of the sphenooccipital synchondrosis in youngsters. (Angle Orthod. 2010;80:106-110.)

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“…Cranium sutures are not accounted in the FE model. This is because in the adult human skull the sutures are partially or fully ossified [1].…”

Section: Solid Models Of Skull Hyrax Device and Anchor Teethmentioning

confidence: 99%

“…Stresses also occur in the region surrounding the silcus of the auditory tube. This indicates that the RME can have a significant impact on the increase of the nasal cavity dimension and improve nasal breathing [1,11,12,16,23] just as it leads to changes of the auditory conductivity in patients with cleft palate. The short-term and long-term impacts of maxillary expansion on the auditory conduction are described in [14].…”

Section: Fig 4 Stress Patterns In Sulc After Activation Of Modelmentioning

confidence: 99%

Craniofacial Stress Patterns and Displacements After Activation of Hyrax Device: Finite Element Modelling

2017

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Stress distribution and displacement analysis during an intermaxillary disjunction—A three-dimensional FEM study of a human skull

Cited by 61 publications

References 16 publications

Early post-treatment changes of circumaxillary sutures in young patients treated with rapid maxillary expansion

Early post-treatment changes of circumaxillary sutures in young patients treated with rapid maxillary expansion

Rapid Maxillary Expansion Affects the Spheno-occipital Synchondrosis in Youngsters

Craniofacial Stress Patterns and Displacements After Activation of Hyrax Device: Finite Element Modelling

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