An in vitro study of the effect of bony buttressing on fixation strength of a fractured atrophic edentulous mandible model. Discussion
Identifieur interne : 009087 ( Main/Exploration ); précédent : 009086; suivant : 009088An in vitro study of the effect of bony buttressing on fixation strength of a fractured atrophic edentulous mandible model. Discussion
Auteurs : J. W. Jr Sikes [États-Unis] ; B. R. Smith [États-Unis] ; D. P. Mukherjee [États-Unis] ; M. R. Tucker [États-Unis]Source :
- Journal of oral and maxillofacial surgery [ 0278-2391 ] ; 2000.
Descripteurs français
- KwdFr :
- Analyse de panne d'appareillage, Analyse du stress dentaire, Animaux, Bovins, Contrainte mécanique, Côtes, Dimension verticale, Force occlusale, Fractures mandibulaires (), Fractures mandibulaires (physiopathologie), Humains, Maquettes de structure, Mâchoire édentée (), Mâchoire édentée (physiopathologie), Ostéosynthèse interne (), Ostéosynthèse interne (instrumentation), Plaques orthopédiques, Résorption alvéolaire (), Résorption alvéolaire (physiopathologie), Vis orthopédiques.
- MESH :
- physiopathologie : Fractures mandibulaires, Mâchoire édentée, Résorption alvéolaire.
- Pascal (Inist)
- Analyse de panne d'appareillage, Analyse du stress dentaire, Animaux, Bovins, Contrainte mécanique, Côtes, Dimension verticale, Force occlusale, Fracture, Fractures mandibulaires, Humains, Mandibule, Edentation, Maquettes de structure, Mâchoire édentée, Ostéosynthèse interne, Plaques orthopédiques, Reconstruction, Plaque, Miniaturisation, Résorption alvéolaire, Titane, Fixation, Résistance, Etude expérimentale, Technique, Résultat, Modèle animal, Bovin, Vis orthopédiques.
- Wicri :
English descriptors
- KwdEn :
- Alveolar Bone Loss (complications), Alveolar Bone Loss (physiopathology), Animal model, Animals, Bite Force, Bone Plates, Bone Screws, Bovine, Cattle, Dental Stress Analysis, Edentulousness, Equipment Failure Analysis, Experimental study, Fixation, Fracture, Fracture Fixation, Internal (instrumentation), Fracture Fixation, Internal (methods), Humans, Jaw, Edentulous (complications), Jaw, Edentulous (physiopathology), Jaw, Edentulous (surgery), Mandible, Mandibular Fractures (complications), Mandibular Fractures (physiopathology), Mandibular Fractures (surgery), Miniaturization, Models, Structural, Plate, Reconstruction, Resistance, Result, Ribs, Stress, Mechanical, Technique, Titanium, Vertical Dimension.
- MESH :
- complications : Alveolar Bone Loss, Jaw, Edentulous, Mandibular Fractures.
- instrumentation : Fracture Fixation, Internal.
- methods : Fracture Fixation, Internal.
- physiopathology : Alveolar Bone Loss, Jaw, Edentulous, Mandibular Fractures.
- surgery : Jaw, Edentulous, Mandibular Fractures.
- Animals, Bite Force, Bone Plates, Bone Screws, Cattle, Dental Stress Analysis, Equipment Failure Analysis, Humans, Models, Structural, Ribs, Stress, Mechanical, Vertical Dimension.
Abstract
Purpose: The purpose of this study was to measure the resistance to displacement in an adult bovine rib mandible model as the vertical dimension of the bone decreases, and to compare the fixation strength of titanium miniplates and reconstruction plates. Materials and Methods: Five groups of 6 ribs each were tested based on the vertical dimension of the rib and method of fixation (group 1, 40 mm, miniplate), (group 2, 30 mm, miniplate), (group 3, 20 mm, miniplate), (group 4, 10 mm, miniplate), (group 5, 10 mm, reconstruction plate). In the 4 groups stabilized with a miniplate, a 3-hole-per-segment, 2.0-mm titanium miniplate and 6.0-mm monocortical titanium screws were used. In group 5, a 3-screw-per-segment, 2.4-mm titanium reconstruction plate and 2.4-mm bicortical titanium screws were used for fixation. A 2-dimensional beam model (Class III lever) was established, and an Instron machine was used initially to develop a load-displacement curve to 100 N for each specimen. An osteotomy was then created, and the segments were reduced without preload. The ribs were then loaded to failure in the Instron machine. The load-displacement curve and failure load were recorded. Results: There was no significant difference (P ≤.05) between any of the groups before the osteotomy. At 75 N, groups 1 and 2 were superior to group 5 in resistance to displacement. Group 4 showed significantly less (P ≤.05) resistance to displacement than the other experimental miniplated subgroups. As loads increased, groups 1 and 2 continued to show increased resistance to displacement when compared with groups 3, 4, and 5. Loads to failure for groups 1 and 2 were comparable to group 5. Conclusions: Decreased resistance to displacement occurs with decreasing vertical dimension of the bovine rib. In fractures of the edentulous mandible, a miniplate is more likely to provide adequate fixation if the mandible is 30 to 40 mm in height (nonatrophic). At higher loads, groups with greater vertical height (30 mm and 40 mm) provided resistance to displacement equivalent to the 10-mm group repaired with a reconstruction plate. Therefore, fractures of the atrophic mandible may be better treated with more rigid techniques.
Affiliations:
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Le document en format XML
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Alveolar Bone Loss (complications)</term>
<term>Alveolar Bone Loss (physiopathology)</term>
<term>Animal model</term>
<term>Animals</term>
<term>Bite Force</term>
<term>Bone Plates</term>
<term>Bone Screws</term>
<term>Bovine</term>
<term>Cattle</term>
<term>Dental Stress Analysis</term>
<term>Edentulousness</term>
<term>Equipment Failure Analysis</term>
<term>Experimental study</term>
<term>Fixation</term>
<term>Fracture</term>
<term>Fracture Fixation, Internal (instrumentation)</term>
<term>Fracture Fixation, Internal (methods)</term>
<term>Humans</term>
<term>Jaw, Edentulous (complications)</term>
<term>Jaw, Edentulous (physiopathology)</term>
<term>Jaw, Edentulous (surgery)</term>
<term>Mandible</term>
<term>Mandibular Fractures (complications)</term>
<term>Mandibular Fractures (physiopathology)</term>
<term>Mandibular Fractures (surgery)</term>
<term>Miniaturization</term>
<term>Models, Structural</term>
<term>Plate</term>
<term>Reconstruction</term>
<term>Resistance</term>
<term>Result</term>
<term>Ribs</term>
<term>Stress, Mechanical</term>
<term>Technique</term>
<term>Titanium</term>
<term>Vertical Dimension</term>
</keywords>
<keywords scheme="KwdFr" xml:lang="fr"><term>Analyse de panne d'appareillage</term>
<term>Analyse du stress dentaire</term>
<term>Animaux</term>
<term>Bovins</term>
<term>Contrainte mécanique</term>
<term>Côtes</term>
<term>Dimension verticale</term>
<term>Force occlusale</term>
<term>Fractures mandibulaires ()</term>
<term>Fractures mandibulaires (physiopathologie)</term>
<term>Humains</term>
<term>Maquettes de structure</term>
<term>Mâchoire édentée ()</term>
<term>Mâchoire édentée (physiopathologie)</term>
<term>Ostéosynthèse interne ()</term>
<term>Ostéosynthèse interne (instrumentation)</term>
<term>Plaques orthopédiques</term>
<term>Résorption alvéolaire ()</term>
<term>Résorption alvéolaire (physiopathologie)</term>
<term>Vis orthopédiques</term>
</keywords>
<keywords scheme="MESH" qualifier="complications" xml:lang="en"><term>Alveolar Bone Loss</term>
<term>Jaw, Edentulous</term>
<term>Mandibular Fractures</term>
</keywords>
<keywords scheme="MESH" qualifier="instrumentation" xml:lang="en"><term>Fracture Fixation, Internal</term>
</keywords>
<keywords scheme="MESH" qualifier="methods" xml:lang="en"><term>Fracture Fixation, Internal</term>
</keywords>
<keywords scheme="MESH" qualifier="physiopathologie" xml:lang="fr"><term>Fractures mandibulaires</term>
<term>Mâchoire édentée</term>
<term>Résorption alvéolaire</term>
</keywords>
<keywords scheme="MESH" qualifier="physiopathology" xml:lang="en"><term>Alveolar Bone Loss</term>
<term>Jaw, Edentulous</term>
<term>Mandibular Fractures</term>
</keywords>
<keywords scheme="MESH" qualifier="surgery" xml:lang="en"><term>Jaw, Edentulous</term>
<term>Mandibular Fractures</term>
</keywords>
<keywords scheme="MESH" xml:lang="en"><term>Animals</term>
<term>Bite Force</term>
<term>Bone Plates</term>
<term>Bone Screws</term>
<term>Cattle</term>
<term>Dental Stress Analysis</term>
<term>Equipment Failure Analysis</term>
<term>Humans</term>
<term>Models, Structural</term>
<term>Ribs</term>
<term>Stress, Mechanical</term>
<term>Vertical Dimension</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Analyse de panne d'appareillage</term>
<term>Analyse du stress dentaire</term>
<term>Animaux</term>
<term>Bovins</term>
<term>Contrainte mécanique</term>
<term>Côtes</term>
<term>Dimension verticale</term>
<term>Force occlusale</term>
<term>Fracture</term>
<term>Fractures mandibulaires</term>
<term>Humains</term>
<term>Mandibule</term>
<term>Edentation</term>
<term>Maquettes de structure</term>
<term>Mâchoire édentée</term>
<term>Ostéosynthèse interne</term>
<term>Plaques orthopédiques</term>
<term>Reconstruction</term>
<term>Plaque</term>
<term>Miniaturisation</term>
<term>Résorption alvéolaire</term>
<term>Titane</term>
<term>Fixation</term>
<term>Résistance</term>
<term>Etude expérimentale</term>
<term>Technique</term>
<term>Résultat</term>
<term>Modèle animal</term>
<term>Bovin</term>
<term>Vis orthopédiques</term>
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<front><div type="abstract" xml:lang="en">Purpose: The purpose of this study was to measure the resistance to displacement in an adult bovine rib mandible model as the vertical dimension of the bone decreases, and to compare the fixation strength of titanium miniplates and reconstruction plates. Materials and Methods: Five groups of 6 ribs each were tested based on the vertical dimension of the rib and method of fixation (group 1, 40 mm, miniplate), (group 2, 30 mm, miniplate), (group 3, 20 mm, miniplate), (group 4, 10 mm, miniplate), (group 5, 10 mm, reconstruction plate). In the 4 groups stabilized with a miniplate, a 3-hole-per-segment, 2.0-mm titanium miniplate and 6.0-mm monocortical titanium screws were used. In group 5, a 3-screw-per-segment, 2.4-mm titanium reconstruction plate and 2.4-mm bicortical titanium screws were used for fixation. A 2-dimensional beam model (Class III lever) was established, and an Instron machine was used initially to develop a load-displacement curve to 100 N for each specimen. An osteotomy was then created, and the segments were reduced without preload. The ribs were then loaded to failure in the Instron machine. The load-displacement curve and failure load were recorded. Results: There was no significant difference (P ≤.05) between any of the groups before the osteotomy. At 75 N, groups 1 and 2 were superior to group 5 in resistance to displacement. Group 4 showed significantly less (P ≤.05) resistance to displacement than the other experimental miniplated subgroups. As loads increased, groups 1 and 2 continued to show increased resistance to displacement when compared with groups 3, 4, and 5. Loads to failure for groups 1 and 2 were comparable to group 5. Conclusions: Decreased resistance to displacement occurs with decreasing vertical dimension of the bovine rib. In fractures of the edentulous mandible, a miniplate is more likely to provide adequate fixation if the mandible is 30 to 40 mm in height (nonatrophic). At higher loads, groups with greater vertical height (30 mm and 40 mm) provided resistance to displacement equivalent to the 10-mm group repaired with a reconstruction plate. Therefore, fractures of the atrophic mandible may be better treated with more rigid techniques.</div>
</front>
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<affiliations><list><country><li>États-Unis</li>
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<region><li>Louisiane</li>
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<name sortKey="Tucker, M R" sort="Tucker, M R" uniqKey="Tucker M" first="M. R." last="Tucker">M. R. Tucker</name>
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