The Influence of the Gonial Angle on the Initial Biomechanical Stability of the Plate Osteosynthesis in Polyurethane Mandibles With Angle Fractures.
J Craniofac Surg
; 31(3): 871-875, 2020.
Article
em En
| MEDLINE
| ID: mdl-31895842
ABSTRACT
The aim of the present study was to examine the biomechanical stability of the mandibular angle fractures (MAF) fixated with standard titanium miniplates in polyurethane models with different gonial angles (GA). Three custom molds were prepared for 3-dimensional printed mandibles with low, normal and high GA. Twenty polyurethane replicas were cast per group and standard MAFs were created on each sample. Fractures were stabilized with 1 4-hole standard titanium miniplate inserted over the superior alveolar border. Half of the samples were subjected to molar loading and the other half to the incisal loading up until 150âN force magnitude. The load-displacement curves and the horizontal moment arms were recorded and analyzed. The samples with high GA demonstrated greater displacement than those with normal and low GA during molar loading (Pâ<â0.05 for both). After correcting for the effects of the moment arm, the incisal loading also resulted in higher mean displacement in the high GA group than the others (Pâ<â0.05 for both) and the normal GA samples showed higher displacement after 100âN level compared to those in low GA (Pâ<â0.05). Within the limits of this in vitro study, it can be concluded that the MAFs of the polyurethane mandibles with high GA fixated with 1 standard monocortical plate are more likely to demonstrate higher displacement values under the effects of the molar and incisal loadings than do the mandibles with normal and low GA.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Poliuretanos
/
Fixação Interna de Fraturas
/
Fraturas Mandibulares
Limite:
Humans
Idioma:
En
Revista:
J Craniofac Surg
Assunto da revista:
ODONTOLOGIA
Ano de publicação:
2020
Tipo de documento:
Article