Repositorio
Institucional

Olate, S.

Pozzer, L.#Cavalieri-Pereira, L.#Navarro, P.#de Albergaria Barbosa, J. R.

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

ELSEVIER SCIENCE BV

JOURNAL OF STOMATOLOGY ORAL AND MAXILLOFACIAL SURGERY

en

Introduction: 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. (C) 2016 Elsevier Masson SAS. All rights reserved.

Artículo original

10.1016/j.jormas.2016.03.001

pdf

Internal fixation# Pre-bend plate# Le Fort I

http://dx.doi.org/10.1016/j.jormas.2016.03.001

Dentistry, Oral Surgery & Medicine

Fijación interna# Placa predoblada# El Fuerte I

Odontología, Cirugía y Medicina Oral

Cirugía

Ingeniería Médica

WOS:000424987800002

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

Artículo original

version publicada

ELSEVIER SCIENCE BV

JOURNAL OF STOMATOLOGY ORAL AND MAXILLOFACIAL SURGERY

Odontología, Cirugía Bucal y Medicina

2468-7855

en

pdf

hibrida#verde

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