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Mechanical stability of 2-plate versus 4-plate osteosynthesis in advancement Le Fort I osteotomy. An in vitro study

dc.contributor.authorPozzer L.
dc.contributor.authorOlate S.
dc.contributor.authorCavalieri-Pereira L.
dc.contributor.authorNavarro P.
dc.contributor.authorde Albergaría Barbosa J.R.
dc.date.accessioned2020-09-02T22:25:57Z
dc.date.available2020-09-02T22:25:57Z
dc.date.issued2017
dc.identifier10.1016/j.jormas.2016.03.001
dc.identifier.citation118, 1, 2-4
dc.identifier.issn24687855
dc.identifier.urihttps://hdl.handle.net/20.500.12728/5847
dc.descriptionIntroduction Stability in orthognathic surgery is nowadays considered as efficient and adequate. The objective of this study was to determine and to compare the mechanical resistance to vertical load of a Le Fort I advancement osteotomy stabilized by mean of two different osteosynthesis techniques, one using two 10-hole pre-bent T-shaped plates, the other using four manually bent 4-hole L- and J-shaped plates. Materiel and methods Standardized Le Fort I advancement osteotomies have been made on polyurethane models. The maxillary advancement was 5 mm. Two groups of five models each were created. Group 1 was stabilized by mean of two 10-hole pre-bent T-shaped plates fixed by monocortical screws in the paranasal region. Group 2 was stabilized by mean of manually bent four 4-hole L-shaped plates fixed monocortical screws in the zygomatic and paranasal regions. A testing machine was used to load vertically the models at the range of 1 mm/min linear displacement until peak load and system failure. Statistical analysis was realized using ANOVA and t-test, considering P as significant if < 0.005. Results The maximal tolerated load was 15 N in group 1and 42.71 N in group 2 (P = 0.003). Discussion The use of two T-shaped 10-holes pre-bent plates allows for less resistance in vertical loading than the use of four 4-holes manually bent L-shaped plates. © 2016 Elsevier Masson SAS
dc.language.isoen
dc.publisherElsevier Masson SAS
dc.subjectInternal fixation
dc.subjectLe Fort I
dc.subjectPre-bend plate
dc.subjectadverse device effect
dc.subjectanatomic model
dc.subjectbone plate
dc.subjectbone screw
dc.subjectdevice failure
dc.subjectdevice failure analysis
dc.subjectdevices
dc.subjectequipment design
dc.subjecthuman
dc.subjectin vitro study
dc.subjectLe Fort osteotomy
dc.subjectmaterials testing
dc.subjectmechanical stress
dc.subjectmechanics
dc.subjectosteosynthesis
dc.subjectprocedures
dc.subjectBone Plates
dc.subjectBone Screws
dc.subjectEquipment Design
dc.subjectEquipment Failure
dc.subjectEquipment Failure Analysis
dc.subjectFracture Fixation, Internal
dc.subjectHumans
dc.subjectIn Vitro Techniques
dc.subjectMaterials Testing
dc.subjectMechanical Phenomena
dc.subjectModels, Anatomic
dc.subjectOsteotomy, Le Fort
dc.subjectStress, Mechanical
dc.titleMechanical stability of 2-plate versus 4-plate osteosynthesis in advancement Le Fort I osteotomy. An in vitro study
dc.typeArticle


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