scholarly journals Rapid Maxillary Expansion and Naso-PharyngealAirway A Three Dimensional Assessment

2018 ◽  
Vol 64 (4) ◽  
pp. 2963-2968
Author(s):  
Noha Abbas ◽  
Walaa Hamed ◽  
Shaimaa Abu el Sadat
Keyword(s):  
Three Dimensional ◽  
Rapid Maxillary Expansion ◽  
Maxillary Expansion ◽  
Dimensional Assessment

scholarly journals Three‐dimensional assessment of craniofacial asymmetry in children with transverse maxillary deficiency after rapid maxillary expansion: A prospective study

2020 ◽  
Vol 23 (3) ◽  
pp. 300-312 ◽  
Author(s):  
Karine Evangelista ◽  
Carolina Ferrari-Piloni ◽  
Leandro Almeida Nascimento Barros ◽  
Melissa Ameloti Gomes Avelino ◽  
Lucia Helena Soares Cevidanes ◽  
...  
Keyword(s):  
Prospective Study ◽  
Three Dimensional ◽  
Rapid Maxillary Expansion ◽  
Maxillary Expansion ◽  
A Prospective Study ◽  
Dimensional Assessment ◽  
Maxillary Deficiency

scholarly journals Three-dimensional assessment of the spheno-occipital synchondrosis and clivus after tooth-borne and bone-borne rapid maxillary expansion:

2021 ◽  
Author(s):  
Rosalia Leonardi ◽  
Vincenzo Ronsivalle ◽  
Manuel O. Lagravere ◽  
Ersilia Barbato ◽  
Gaetano Isola ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Rapid Maxillary Expansion ◽  
Maxillary Expansion ◽  
Linear Measurements ◽  
Retention Period ◽  
Computed Tomography Images ◽  
Surface Models ◽  
Cranial Fossa ◽  
Dimensional Assessment ◽  
Maxillary Deficiency

ABSTRACT Objectives To assess changes in spheno-occipital synchondrosis after rapid maxillary expansion (RME) performed with conventional tooth-borne (TB) and bone-borne (BB) appliances. Materials and Methods This study included 40 subjects with transverse maxillary deficiency who received TB RME or BB RME. Cone-beam computed tomography images (CBCT) were taken before treatment (T0), and after a 6-month retention period (T1). Three-dimensional surface models of the spheno-occipital synchondrosis and basilar part of the occipital bone were generated. The CBCTs taken at T0 and T1 were registered at the anterior cranial fossa via voxel-based superimposition. Quantitative evaluation of Basion displacement was performed with linear measurements and Euclidean distances. The volume of the synchndrosis was also calculated for each time point as well as the Nasion-Sella-Basion angle (N-S-Ba°). All data were statistically analyzed to perform inter-timing and intergroup comparisons. Results In both groups, there was a small increment of the volume of the synchondrosis and of N-S-Ba° (P < .05). Basion showed a posterosuperior pattern of displacement. However, no significant differences (P > .05) were found between the two groups. Conclusions Although TB and BB RME seemed to have some effects on the spheno-occipital synchondrosis, differences were very small and clinically negligible.

scholarly journals Comparison of Tooth- and Bone-Borne Appliances on the Stress Distributions and Displacement Patterns in the Facial Skeleton in Surgically Assisted Rapid Maxillary Expansion—A Finite Element Analysis (FEA) Study

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1152
Author(s):  
Rafał Nowak ◽  
Anna Olejnik ◽  
Hanna Gerber ◽  
Roman Frątczak ◽  
Ewa Zawiślak
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Three Dimensional ◽  
Element Model ◽  
Rapid Maxillary Expansion ◽  
Stress Distributions ◽  
Maxillary Expansion ◽  
Facial Skeleton ◽  
Element Analysis ◽  
Maxillary Constriction

The aim of this study was to compare the reduced stresses according to Huber’s hypothesis and the displacement pattern in the region of the facial skeleton using a tooth- or bone-borne appliance in surgically assisted rapid maxillary expansion (SARME). In the current literature, the lack of updated reports about biomechanical effects in bone-borne appliances used in SARME is noticeable. Finite element analysis (FEA) was used for this study. Six facial skeleton models were created, five with various variants of osteotomy and one without osteotomy. Two different appliances for maxillary expansion were used for each model. The three-dimensional (3D) model of the facial skeleton was created on the basis of spiral computed tomography (CT) scans of a 32-year-old patient with maxillary constriction. The finite element model was built using ANSYS 15.0 software, in which the computations were carried out. Stress distributions and displacement values along the 3D axes were found for each osteotomy variant with the expansion of the tooth- and the bone-borne devices at a level of 0.5 mm. The investigation showed that in the case of a full osteotomy of the maxilla, as described by Bell and Epker in 1976, the method of fixing the appliance for maxillary expansion had no impact on the distribution of the reduced stresses according to Huber’s hypothesis in the facial skeleton. In the case of the bone-borne appliance, the load on the teeth, which may lead to periodontal and orthodontic complications, was eliminated. In the case of a full osteotomy of the maxilla, displacements in the buccolingual direction for all the variables of the bone-borne appliance were slightly bigger than for the tooth-borne appliance.

Three-dimensional evaluation of surgically assisted implant bone-borne rapid maxillary expansion: A pilot study

2007 ◽  
Vol 131 (4) ◽  
pp. S92-S99 ◽  
Author(s):  
Eve Tausche ◽  
Lars Hansen ◽  
Volker Hietschold ◽  
Manuel O. Lagravère ◽  
Winfried Harzer
Keyword(s):  
Pilot Study ◽  
Three Dimensional ◽  
Rapid Maxillary Expansion ◽  
Maxillary Expansion

scholarly journals Effects of surgically assisted rapid maxillary expansion on mandibular position: a three-dimensional study

2017 ◽  
Vol 18 (1) ◽  
Author(s):  
Talles Fernando Medeiros Oliveira ◽  
Valfrido Antônio Pereira-Filho ◽  
Mario Francisco Real Gabrielli ◽  
Eduardo Sanches Gonçales ◽  
Ary Santos-Pinto
Keyword(s):  
Three Dimensional ◽  
Rapid Maxillary Expansion ◽  
Maxillary Expansion ◽  
Mandibular Position
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