In-vitro comparison of mechanical resistance between two straight plates and a Y-plate for fixation of mandibular condyle fractures

Souza, Glaciele Maria de; Rodrigues, Danillo Costa; Filho, Tóride Sebastião Celegatti; Moreira, Roger William Fernandes; Falci, Saulo Gabriel Moreira

doi:10.1016/j.jcms.2017.11.005

Cited by 11 publications

(11 citation statements)

References 24 publications

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“…In the study of de Jesus et al, It had been showed that the von mises stress of trapezoidal plate statistically differs from 4 hole two mini plates and it is considerably less [6] . In the literature of de souza et al, straight plates withstand mechanical force better when forces are applied to the condyle in the anteroposterior direction [8] . The study of Albogha et al dictated that the rigidity of osteosynthesis is higher in trapezoidal plate and Trapezoidal plate also showed lower strain as it accommodated the horizontal arrangement of screws in the distal segment.…”

Section: Resultsmentioning

confidence: 97%

Plating systems for 3D stability of subcondylar fracture: A research article with review of literature

Bhowmick¹,

Bhowal²,

Ghosh³

2019

Int. J. Orthop. Sci.

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Section: Resultsmentioning

confidence: 97%

Plating systems for 3D stability of subcondylar fracture: A research article with review of literature

Bhowmick¹,

Bhowal²,

Ghosh³

2019

Int. J. Orthop. Sci.

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“…Vertical load direction imitates the functional load at the time of mouth opening [ 30 ]. The fixation of double u-HA/PLLA screws showed a significantly lower resistance at the initial load compared with the two titanium screws, but this was not the case at higher loads.…”

Section: Discussionmentioning

confidence: 99%

“…Although the shear strength of u-HA/PLLA was clearly low, as shown in the first experiment, using double-screw fixation generated high strength. This load direction imitates functional load during the lateral movement of the mandible [ 16 , 30 ]. This result suggested that the bioresorbable screw had sufficient strength for a functional load during the lateral exercise for the osteosynthesis of mandibular condylar head fracture.…”

Section: Discussionmentioning

confidence: 99%

Biomechanical Loading Comparison between Titanium and Bioactive Resorbable Screw Systems for Fixation of Intracapsular Condylar Head Fractures

et al. 2020

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Osteosynthesis resorbable materials made of uncalcined and unsintered hydroxyapatite (u-HA) particles, poly-L-lactide (PLLA), are bioresorbable, and these materials have feasible bioactive/osteoconductive capacities. However, their strength and stability for fixation in mandibular condylar head fractures remain unclear. This in vitro study aimed to assess the biomechanical strength of u-HA/PLLA screws after the internal fixation of condylar head fractures. To evaluate their biomechanical behavior, 32 hemimandible replicas were divided into eight groups, each consisting of single-screw and double-screw fixations with titanium or u-HA/PLLA screws. A linear load was applied as vertical and horizontal load to each group to simulate the muscular forces in condylar head fractures. Samples were examined for 0.5, 1, 2, and 3-mm displacement loads. Two screws were needed for stable fixation of the mandibular condylar head fracture during biomechanical evaluation. After screw fixation for condylar head fractures, the titanium screws model was slightly more resistant to vertical and horizontal movement with a load for a small displacement than the u-HA/PLLA screws model. There was no statistically significant difference with load for large displacements. The u-HA/PLLA screw has a low mechanical resistance under small displacement loading compared with titanium within the limits of the mandibular head fracture model study.

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“…In the lateromedial loading test, there was no significant difference between the u-HA/PLLA bioresorbable plates and the titanium plates. One of the most important clinical indications for surgical treatment of mandibular condylar fracture is the medial displacement of the condyle [21], which is caused by traction of the lateral pterygoid muscle. The primary function of the lateral pterygoid muscle is to pull the head of the condyle out of the mandibular fossa along the articular eminence to make the mandible protrude [22].…”

Section: Discussionmentioning

confidence: 99%

Biomechanical Loading Comparison between Titanium and Unsintered Hydroxyapatite/Poly-L-Lactide Plate System for Fixation of Mandibular Subcondylar Fractures

et al. 2019

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Osteosynthesis absorbable materials made of uncalcined and unsintered hydroxyapatite (u-HA) particles, poly-l-lactide (PLLA), and u-HA/PLLA are bioresorbable, and these plate systems have feasible bioactive osteoconductive capacities. However, their strength and stability for fixation in mandibular subcondylar fractures remain unclear. This in vitro study aimed to assess the biomechanical strength of u-HA/PLLA bioresorbable plate systems after internal fixation of mandibular subcondylar fractures. Tensile and shear strength were measured for each u-HA/PLLA and titanium plate system. To evaluate biomechanical behavior, 20 hemimandible replicas were divided into 10 groups, each comprising a titanium plate and a bioresorbable plate. A linear load was applied anteroposteriorly and lateromedially to each group to simulate the muscular forces in mandibular condylar fractures. All samples were analyzed for each displacement load and the displacement obtained by the maximum load. Tensile and shear strength of the u-HA/PLLA plate were each approximately 45% of those of the titanium plates. Mechanical resistance was worst in the u-HA/PLLA plate initially loaded anteroposteriorly. Titanium plates showed the best mechanical resistance during lateromedial loading. Notably, both plates showed similar resistance when a lateromedially load was applied. In the biomechanical evaluation of mandibular condylar fracture treatment, the u-HA/PLLA plates had sufficiently high resistance in the two-plate fixation method.

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In-vitro comparison of mechanical resistance between two straight plates and a Y-plate for fixation of mandibular condyle fractures

Cited by 11 publications

References 24 publications

Plating systems for 3D stability of subcondylar fracture: A research article with review of literature

Plating systems for 3D stability of subcondylar fracture: A research article with review of literature

Biomechanical Loading Comparison between Titanium and Bioactive Resorbable Screw Systems for Fixation of Intracapsular Condylar Head Fractures

Biomechanical Loading Comparison between Titanium and Unsintered Hydroxyapatite/Poly-L-Lactide Plate System for Fixation of Mandibular Subcondylar Fractures

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