Your browser doesn't support javascript.
loading
Femoral neck osteosynthesis using interfragmentary compression or position screw in synthetic bones. What are the mechanical differences?
de Góes Ribeiro, Arthur; Almeida, Pedro Henrique; Raia, Fabio; Christian, Ralph Walter; Hungria, José Octávio Soares; Santili, Cláudio; Mercadante, Marcelo Tomanik.
Afiliación
  • de Góes Ribeiro A; Orthopaedics and Traumatology Department, Irmandade da Santa Casa de Misericórdia de São Paulo, São Paulo, Brazil. arthurgr@gmail.com.
  • Almeida PH; Orthopaedics and Traumatology Department, Irmandade da Santa Casa de Misericórdia de São Paulo, São Paulo, Brazil.
  • Raia F; Mackenzie Presbiterian University, São Paulo, Brazil.
  • Christian RW; Orthopaedics and Traumatology Department, Irmandade da Santa Casa de Misericórdia de São Paulo, São Paulo, Brazil.
  • Hungria JOS; Orthopaedics and Traumatology Department, Irmandade da Santa Casa de Misericórdia de São Paulo, São Paulo, Brazil.
  • Santili C; Orthopaedics and Traumatology Department, Irmandade da Santa Casa de Misericórdia de São Paulo, São Paulo, Brazil.
  • Mercadante MT; Orthopaedics and Traumatology Department, Irmandade da Santa Casa de Misericórdia de São Paulo, São Paulo, Brazil.
Eur J Orthop Surg Traumatol ; 34(7): 3767-3774, 2024 Oct.
Article en En | MEDLINE | ID: mdl-38780791
ABSTRACT

PURPOSE:

We aim to compare interfragmentary compression with the position osteosynthesis in the fixation of different femoral neck fractures (FN) in synthetic bones subjected to vertical load.

METHODS:

Forty-two synthetic femurs were subjected to neck fractures and separated into 3 groups according to the Pauwels classification Pauwels I had 6 units (PI); Pauwels II, 24 units, with and without comminution (PII); and Pauwels III, 12 units, with and without comminution (PIII). After, they were fixed with 2 different ways three 7, 0 mm cannulated lag screws (CSs) versus three 6, 5 mm solid fully threaded screws (SSs). Screws positioning was oriented by the Pauwels classification inverted triangle or crossed screws. All specimens were submitted to vertical loading until failure.

RESULTS:

The average force was 79.4 ± 22.6 Kgf. The greatest one was recorded in model 1 (135.6 Kgf), and the lowest in model 41 (39.6 Kgf). CSs and SSs had similar resistance until failure (p = 0.2). PI showed heightened resistance and PIII showed a worse response (p < 0,01). CSs had better performance in PIII (p = 0.048). Comminution and screws orientation caused no difference on peak force (p = 0.918 and p = 0.340, respectively).

CONCLUSIONS:

In synthetic bones, the resistance of a femoral neck fracture osteosynthesis using a 7, 0 mm cannulated lag screw or 6, 5 mm solid fully threaded screw are similar. There was no loss of efficiency with comminution in the femoral neck. Osteosynthesis resistance decreased with the verticalization of the fracture line and, in the more vertical ones, interfragmentary compression with CSs was more resistant than positional osteosynthesis with SSs.
Asunto(s)
Palabras clave

Texto completo: 1 Bases de datos: MEDLINE Asunto principal: Tornillos Óseos / Fracturas del Cuello Femoral / Fijación Interna de Fracturas Límite: Humans Idioma: En Revista: Eur J Orthop Surg Traumatol Año: 2024 Tipo del documento: Article País de afiliación: Brasil

Texto completo: 1 Bases de datos: MEDLINE Asunto principal: Tornillos Óseos / Fracturas del Cuello Femoral / Fijación Interna de Fracturas Límite: Humans Idioma: En Revista: Eur J Orthop Surg Traumatol Año: 2024 Tipo del documento: Article País de afiliación: Brasil