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
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...
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doaj-5e5915bdca3f42a0a437caa9932a9f8a2021-03-02T00:02:54ZengMDPI AGMaterials1996-19442021-03-01141152115210.3390/ma14051152Comparison 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) StudyRafał Nowak0Anna Olejnik1Hanna Gerber2Roman Frątczak3Ewa Zawiślak4Department of Maxillofacial Surgery, Wroclaw Medical University, Borowska 213, 50-556 Wrocław, PolandDepartment of Maxillofacial Surgery, Wroclaw Medical University, Borowska 213, 50-556 Wrocław, PolandDepartment of Maxillofacial Surgery, Wroclaw Medical University, Borowska 213, 50-556 Wrocław, PolandNOBO Solutions S.A., Al. Kasztanowa 3A-5, 53-125 Wrocław, PolandDepartment of Maxillofacial Surgery, Wroclaw Medical University, Borowska 213, 50-556 Wrocław, PolandThe 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.https://www.mdpi.com/1996-1944/14/5/1152SARMEtranspalatal distractionfinite element analysismaxillary constrictionmaxillary expansionorthognathic surgery |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Rafał Nowak Anna Olejnik Hanna Gerber Roman Frątczak Ewa Zawiślak |
spellingShingle |
Rafał Nowak Anna Olejnik Hanna Gerber Roman Frątczak Ewa Zawiślak 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 SARME transpalatal distraction finite element analysis maxillary constriction maxillary expansion orthognathic surgery |
author_facet |
Rafał Nowak Anna Olejnik Hanna Gerber Roman Frątczak Ewa Zawiślak |
author_sort |
Rafał Nowak |
title |
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 |
title_short |
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 |
title_full |
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 |
title_fullStr |
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 |
title_full_unstemmed |
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 |
title_sort |
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 |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2021-03-01 |
description |
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. |
topic |
SARME transpalatal distraction finite element analysis maxillary constriction maxillary expansion orthognathic surgery |
url |
https://www.mdpi.com/1996-1944/14/5/1152 |
work_keys_str_mv |
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