Experimental and Numerical Modeling of Screws Used for Rigid Internal Fixation of Mandibular Fractures
Experimental and numerical methods are used to explore the stresses generated around bone screws used in rigid internal fixation of mandibular fractures. These results are intended to aid in decisions concerning both the design and the use of these bone screws. A finite element (FE) model of a human...
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| Format: | Article |
| Language: | English |
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Wiley
2008-01-01
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| Series: | Modelling and Simulation in Engineering |
| Online Access: | http://dx.doi.org/10.1155/2008/628120 |
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| author | Naresh Chaudhary Scott T. Lovald Jon Wagner Tariq Khraishi Bret Baack |
| author_facet | Naresh Chaudhary Scott T. Lovald Jon Wagner Tariq Khraishi Bret Baack |
| author_sort | Naresh Chaudhary |
| collection | DOAJ |
| description | Experimental and numerical methods are used to explore the stresses generated around bone screws used in rigid internal fixation of mandibular fractures. These results are intended to aid in decisions concerning both the design and the use of these bone screws. A finite element (FE) model of a human mandible is created with a fixated fracture in the parasymphyseal region. The mandibular model is anatomically loaded, and the forces exerted by the fixation plate onto the simplified screws are obtained and transferred to another finite element submodel of a screw implant embedded in a trilaminate block with material properties of cortical and cancellous bone. The stress in the bone surrounding the screw implant is obtained and compared for different screw configurations. The submodel analyses are further compared to and validated with simple axial experimental and numerical screw pull-out models. Results of the screw FE analysis (FEA) submodel show that a unicortical screw of 2.6 mm major diameter and 1.0 mm pitch will cause less bone damage than a bicortical screw of 2.3 mm major diameter and 1.0 mm pitch. The results of this study suggest that bicortical drilling can be avoided by using screws of a larger major diameter. |
| format | Article |
| id | doaj-art-86c7b38dad09428f8fb6dbe0c09333de |
| institution | Kabale University |
| issn | 1687-5591 1687-5605 |
| language | English |
| publishDate | 2008-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Modelling and Simulation in Engineering |
| spelling | doaj-art-86c7b38dad09428f8fb6dbe0c09333de2025-02-03T01:27:49ZengWileyModelling and Simulation in Engineering1687-55911687-56052008-01-01200810.1155/2008/628120628120Experimental and Numerical Modeling of Screws Used for Rigid Internal Fixation of Mandibular FracturesNaresh Chaudhary0Scott T. Lovald1Jon Wagner2Tariq Khraishi3Bret Baack4Manufacturing Engineering Program, University of New Mexico, Albuquerque, NM 87131, USAMechanical Engineering Department, University of New Mexico, Albuquerque, NM 87131, USADepartment of Surgery, University of New Mexico, Albuquerque, NM 87131, USAMechanical Engineering Department, University of New Mexico, Albuquerque, NM 87131, USADepartment of Surgery, University of New Mexico, Albuquerque, NM 87131, USAExperimental and numerical methods are used to explore the stresses generated around bone screws used in rigid internal fixation of mandibular fractures. These results are intended to aid in decisions concerning both the design and the use of these bone screws. A finite element (FE) model of a human mandible is created with a fixated fracture in the parasymphyseal region. The mandibular model is anatomically loaded, and the forces exerted by the fixation plate onto the simplified screws are obtained and transferred to another finite element submodel of a screw implant embedded in a trilaminate block with material properties of cortical and cancellous bone. The stress in the bone surrounding the screw implant is obtained and compared for different screw configurations. The submodel analyses are further compared to and validated with simple axial experimental and numerical screw pull-out models. Results of the screw FE analysis (FEA) submodel show that a unicortical screw of 2.6 mm major diameter and 1.0 mm pitch will cause less bone damage than a bicortical screw of 2.3 mm major diameter and 1.0 mm pitch. The results of this study suggest that bicortical drilling can be avoided by using screws of a larger major diameter.http://dx.doi.org/10.1155/2008/628120 |
| spellingShingle | Naresh Chaudhary Scott T. Lovald Jon Wagner Tariq Khraishi Bret Baack Experimental and Numerical Modeling of Screws Used for Rigid Internal Fixation of Mandibular Fractures Modelling and Simulation in Engineering |
| title | Experimental and Numerical Modeling of Screws Used for Rigid Internal Fixation of Mandibular Fractures |
| title_full | Experimental and Numerical Modeling of Screws Used for Rigid Internal Fixation of Mandibular Fractures |
| title_fullStr | Experimental and Numerical Modeling of Screws Used for Rigid Internal Fixation of Mandibular Fractures |
| title_full_unstemmed | Experimental and Numerical Modeling of Screws Used for Rigid Internal Fixation of Mandibular Fractures |
| title_short | Experimental and Numerical Modeling of Screws Used for Rigid Internal Fixation of Mandibular Fractures |
| title_sort | experimental and numerical modeling of screws used for rigid internal fixation of mandibular fractures |
| url | http://dx.doi.org/10.1155/2008/628120 |
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