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 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.

Effect of a rapid maxillary expansion on snoring and sleep in children: a pilot study

CRANIO® ◽  
2014 ◽  
Vol 33 (3) ◽  
pp. 169-173 ◽  
Author(s):  
Lilian Chrystiane Giannasi ◽  
Israel Reis Santos ◽  
Thays Almeida Alfaya ◽  
Sandra Kalil Bussadori ◽  
Fernando Studart Leitão-Filho ◽  
...  
Keyword(s):  
Pilot Study ◽  
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

scholarly journals CBCT of skeletal changes following rapid maxillary expansion to increase arch-length with a development-dependent bonded or banded appliance

2013 ◽  
Vol 83 (5) ◽  
pp. 851-857 ◽  
Author(s):  
Ryuzo Kanomi ◽  
Toru Deguchi ◽  
Eriko Kakuno ◽  
Teruko Takano-Yamamoto ◽  
W. Eugene Roberts
Keyword(s):  
Three Dimensional ◽  
Pediatric Dentistry ◽  
Rapid Maxillary Expansion ◽  
Cone Beam ◽  
Older Children ◽  
Maxillary Expansion ◽  
Skeletal Changes ◽  
Skeletal Effects ◽  
3D Evaluation ◽  
Skeletal Expansion

ABSTRACT Objective: To assess the three-dimensional (3D) skeletal response to a standardized 5 mm of rapid maxillary expansion (RME) in growing children (6–15 years) with maxillary width deficiency and crowding. Materials and Methods: A bonded appliance was used prior to the eruption of the maxillary first premolars (Mx4s), and a banded appliance was used thereafter. A consecutive sample of 89 patients (29 boys and 60 girls) from a large pediatric dentistry and orthodontics practice was divided into four groups: 1) 6–8 years old (n  =  26), 2) 9–11 years old with unerupted Mx4s (n  =  21), 3) 9–11 years with erupted Mx4s (n  =  23), and 4) 12–15 years (n  =  19). For all patients, the 3D evaluation of dental and skeletal effects was performed with cone-beam computed tomography (CBCT). Results: For both appliances in all patients, CBCT confirmed a triangular pattern of expansion in both the frontal and sagittal planes. Overall, both appliances produced significant maxillary expansion (>80% of the 5-mm activation), but older children showed a progressively more dental (less skeletal) response. Comparison of the two types of expanders in the crossover sample, children aged 9–11 years, showed that the bonded RME produced the most efficient skeletal expansion in the preadolescent sample. Increased maxillary width at the level of the zygomaticomaxillary suture was the best indicator for development of maxillary arch circumference. Conclusion: Development-dependent appliances (bonded RPE before Mx4s erupt, and a banded device thereafter) provided optimal RME treatment for all children from age 6–15 years.

scholarly journals 3D mandibular positioning after rapid maxillary expansion in Class II malocclusion

2011 ◽  
Vol 22 (5) ◽  
pp. 428-434 ◽  
Author(s):  
Carolina Baratieri ◽  
Matheus Alves Jr ◽  
Eduardo Franzotti Sant’anna ◽  
Matilde da Cunha Gonçalves Nojima ◽  
Lincoln Issamu Nojima
Keyword(s):  
Lateral Displacement ◽  
Three Dimensional ◽  
Vertical Displacement ◽  
Class Ii ◽  
Rapid Maxillary Expansion ◽  
Maxillary Expansion ◽  
Retention Period ◽  
Division 1 ◽  
Maxillary Constriction ◽  
Class Ii Division 1

This study investigated, using cone beam computed tomography (CBCT), the spatial mandibular positioning after rapid maxillary expansion (RME) in Class II Division 1 malocclusion. This prospective study evaluated 17 children (mean initial age 10.36 years old) presenting Class II, Division 1 malocclusion and skeletal maxillary constriction that underwent to RME Haas’ protocol. CBCT was performed before treatment (T1), immediately after the stabilization of expander screw (T2) and after the retention period of 6 months (T3). The scans were managed in Dolphin Imaging® 11.0 software, where landmarks (right and left condylion, right and left gonion, and menton) were positioned and measured in relation to sagittal, coronal and axial plane to verify, respectively, transverse, anteroposterior and vertical displacement of the mandible. Paired Student’s t-test was used to identify significant differences (p<0.05) between T1 and T2, T2 and T3, and T1 and T3. After RME, right and left gonion moved downward (1.11 mm and 0.89 mm) and menton displaced downward (1.90 mm) and backward (1.50 mm). During the retention period, only anteroposterior displacement was significant, with the right and left gonion (0.97 mm and 1.26 mm) and the menton (2.29 mm) moving forward. Three-dimensional assessment of the mandible in Class II Division 1 patients subjected to RME showed a transitory backward and downward mandibular positioning, without any lateral displacement. The 6-month retention period allowed the mandible shifting significantly forward, exhibiting a more anterior position compared with the initial condition, even remaining in a more downward direction.

scholarly journals Rapid maxillary expansion screws on the test bench--a pilot study

2010 ◽  
Vol 33 (3) ◽  
pp. 256-262 ◽  
Author(s):  
A. P. Muchitsch ◽  
B. Wendl ◽  
H. Winsauer ◽  
M. Pichelmayer ◽  
M. Payer
Keyword(s):  
Pilot Study ◽  
Test Bench ◽  
Rapid Maxillary Expansion ◽  
Maxillary Expansion
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