In vitro study of a modified sagittal split osteotomy fixation technique of the mandible: a mechanical test

Sonego, Camila Leal; Scheffer, Miguel Angelo Ribeiro; Júnior, Otacílio Luiz Chagas; Vetromilla, Bruna Muhlinberg; Fernandes, Lopes; Özkömür, Ahmet; Júnior, Aurelício Novaes Silva; Júnior, Sergio Augusto Quevedo Miguens; Hernandez, Pedro Antônio González

doi:10.1016/j.ijom.2018.03.023

Cited by 3 publications

(4 citation statements)

References 24 publications

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“…The biomechanical characteristics of different fixation methods in SSRO have been explored in previous studies ( 6 – 10 , 12 , 13 , 17 , 19 – 23 ); however, these studies focused mainly on small advancements ( 7 , 9 , 10 , 13 , 19 , 22 , 23 ). In clinical practice, large advancement in SSRO is not uncommon to correct severe mandibular deformity and improve the airway in OSA ( 17 , 18 ).…”

Section: Discussionmentioning

confidence: 99%

“…The single miniplate showed the worst results regarding the least amount of displacement in the osteotomy region. To prevent relapse, dual miniplates, grid plates, Y-shaped plates, dual L-shaped plates, and hybrid fixation could be considered improved fixation technology over single miniplate ( 6 , 7 , 9 , 12 – 14 ). Several studies investigated the effect of different types of miniplates on fixation in SSRO.…”

Section: Discussionmentioning

confidence: 99%

“…Novel fixation devices have been developed and tested with the goal of providing stronger segmental stability after SSRO. Sonego et al introduced a new method of fixing osteotomy segments with dual L-shaped plates ( 9 ). Using biomechanical tests, the authors found that dual L-shaped plates and bicortical screws provided similar stability after SSRO, and the stability was greater than that with straight titanium plates.…”

Section: Discussionmentioning

confidence: 99%

“…However, rigid fixation is difficult to obtain using only a single miniplate. To overcome the shortcomings, derivative methods are used to increase stabilization, such as dual miniplates, Y-shaped plates, dual L-shaped plates, grid plates, and hybrid techniques ( 6 , 7 , 9 , 12 – 15 ). Hybrid fixation was advocated by Schwartz and Relle to combine the advantages of bicortical screws and miniplates with monocortical screws ( 15 ).…”

Section: Introductionmentioning

confidence: 99%

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Biomechanical Evaluation of Seven Fixation Methods for Sagittal Split Ramus Osteotomy with Four Advancement Levels by Finite Element Analysis

Zhang

Qiao

et al. 2022

Front. Surg.

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BackgroundMandibular sagittal split ramus osteotomy (SSRO) is a routine surgery to correct mandibular deformities, such as mandibular retrusion, protrusion, deficiency, and asymmetry. However, nonunion/malunion of the fragments and relapse caused by fixation failure after SSRO are major concerns. Rigid fixation to maintain postosteotomy segmental stabilization is critical for success. Additionally, understanding the biomechanical characteristics of different fixation methods in SSRO with large advancements is extremely important for clinical guidance. Therefore, the aim of the present study was to evaluate the biomechanical characteristics of different SSRO methods by finite element analysis.MethodsSSRO finite element models with 5-, 10-, 15-, and 20-mm advancements were developed. Seven fixation methods, namely, two types of bicortical screws, single miniplate, dual miniplates, grid plate, dual L-shaped plates, and hybrid fixation, were positioned into the SSRO models. Molar and incisal biomechanical loads were applied to all models to simulate bite forces. We then investigated the immediate postoperative stability from four aspects, namely, the stability of the distal osteotomy segment, osteotomy regional stability, stress distribution on the mandible, and implant stress performance.ResultsThe stability of the distal osteotomy segment and osteotomy region decreased when the advancement increased. All seven fixation methods displayed favorable biomechanical stability under minor advancement (5 mm). With large advancements, bicortical screws, dual miniplates, and grid plates provided better stability. The von Mises stress was concentrated around the screws close to the osteotomy region for the proximal segment for all fixation methods, and the von Mises stress on implants increased with larger advancements. With small advancements, five fixation methods endured tolerable maximum stresses of <880 MPa. A single miniplate and dual L-shaped plates generally suffered high stresses using larger advancements. The biomechanical characteristics were similar under molar and incisal loads.ConclusionsThe current study investigated the biomechanical properties of seven fixation devices after SSRO under molar and incisal loads. Generally, bicortical screws, grid plates, and dual miniplates provided better biomechanical stability using finite element analysis.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Biomechanical Evaluation of Seven Fixation Methods for Sagittal Split Ramus Osteotomy with Four Advancement Levels by Finite Element Analysis

Zhang

Qiao

et al. 2022

Front. Surg.

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Comparison of the Bone Segments Displacement Between Two Sides of the Mandible After BSSO

Pachnicz

Szust

2020

Innovations in Biomedical Engineering

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Duplex Fluorinated and Atomic Layer Deposition-Derived ZrO2 Coatings Improve the Corrosion Resistance and Mechanical Properties of Mg-2Zn-0.46Y-0.5Nd (wt.%) Alloy Plates and Screws

Qiu,

Yang,

Chen

et al. 2024

Materials

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This study investigated the corrosion resistance and mechanical properties of Mg-2Zn-0.46Y-0.5Nd (wt.%) alloy plates and screws with fluorinated coatings and atomic layer deposition (ALD)-derived zirconia (ZrO2) coatings in vitro under physiological stress conditions. Synthetic polyurethane hemimandible replicas were split and fixed as the following three groups of magnesium alloy plates and screws: no additional surface coating treatment (Group A), with fluorinated coatings (Group B), and with duplex fluorinated and ALD-derived 100 nm ZrO2 coatings (Group C). A circulating stress of 1–10 N was applied to the distal bone segment, and a 4-week simulated body fluid immersion test was employed to study the remaining material volume and the mechanical properties of the different groups. Compared with Group A and Group B, the degradation rate of magnesium alloy plates and screws’ head regions was significantly slowed down under the protection of duplex MgF2/ZrO2 coatings (p < 0.01). There was no significant difference in the degradation rate of the screw shaft region between groups (p = 0.077). In contrast to fluoride coatings, duplex MgF2/ZrO2 coatings maintained the mechanical strength of magnesium alloy plates and screws after a 14 day in vitro SBF immersion test. We conclude that duplex MgF2/ZrO2 coatings exhibited a certain protective effect on the Mg alloy plates and screws under physiological stress conditions.

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In vitro study of a modified sagittal split osteotomy fixation technique of the mandible: a mechanical test

Cited by 3 publications

References 24 publications

Biomechanical Evaluation of Seven Fixation Methods for Sagittal Split Ramus Osteotomy with Four Advancement Levels by Finite Element Analysis

Biomechanical Evaluation of Seven Fixation Methods for Sagittal Split Ramus Osteotomy with Four Advancement Levels by Finite Element Analysis

Comparison of the Bone Segments Displacement Between Two Sides of the Mandible After BSSO

Duplex Fluorinated and Atomic Layer Deposition-Derived ZrO2 Coatings Improve the Corrosion Resistance and Mechanical Properties of Mg-2Zn-0.46Y-0.5Nd (wt.%) Alloy Plates and Screws

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