Acessibilidade / Reportar erro

Biomechanical analysis on different fixation techniques for treatment of mandibular body fractures

Abstract

AIM: To biomechanically analyze two fixation techniques in polyurethane hemi-mandibular body fractures, using a universal testing machine. METHODS: The study employed 10 polyurethane hemi-mandible replicas, which simulated simple fractures of the mandibular body, divided into two groups: one group comprised 5 hemi-mandibles with two 2.0 mm system plates in the tension and compression zones, while the other group contained 5 hemi-mandibles with an Erich bar and a 2.0 mm system plate in the tension and neutral zones, respectively. Data were analyzed statistically by the Student's t-test (α=0.05) RESULTS: The test results indicated that the fixation using 2.0 mm system plates offered significantly more resistance to the loads and presented significantly larger displacement compared to the fixation using just one 2.0 mm system plate and the Erich bar. CONCLUSIONS: It may be concluded that the use of two plates in the 2.0 mm system had greater mechanical strength than a single 2.0 mm plate combined with an Erich bar. Clinically, it is known that both techniques can provide good results, but patients receiving the combination of Erich bar and one plate are required to be more cooperative during the postoperative period, especially with respect to the prescribed diet in order to avoid failures in this system.

mandibular fractures; bone plates; internal fixation of fractures


  • 1
    Martini MZ, Takahashi A, Oliveira Neto HG, Carvalho Júnior JP, Curcio R, Shinohara EH. Epidemiology of Mandibular Fractures Treated in a Brazilian Level I Trauma Public Hospital in the City of São Paulo, Brazil. Braz Dent J. 2006; 17: 243-8.
  • 2
    Atilgan S, Erol B, Yaman F, Yilmaz N, Ucan MC. Mandibular fractures: a comparative analysis between young and adult patients in the southeast region of Turkey. J Appl Oral Sci. 2010; 18: 17-22.
  • 3
    Peterson JL, Ellis III E, Hupp JR, Tucker MR. Contemporary oral and maxillofacial surgery. 4th ed. Saint Louis: Mosby; 2002.
  • 4
    Fonseca RJ, Marciani RD, Turvey TA. Oral and maxillofacial surgery. 2nd ed. Saint Louis: Saunder Elsevier; 2009. v.2.
  • 5
    Sauerbier S, Schön R, Otten JE, Schmelzeisen R, Gutwald RJ. The development of plate osteosynthesis for the treatment of fractures of the mandibular body and a literature review. J Craniomaxillofac Surg. 2008; 36: 251-9.
  • 6
    Ellis III E. Treatment methods for fractures of the mandibular angle. Int J Oral Maxillofac Surg. 1999; 28: 243-52.
  • 7
    Miloro M, Ghali EG, Larsen EP, Waite DP. Peterson's principles of oral and maxillofacial surgery. Hamilton: BC Decker; 2004.
  • 8
    Ellis III E. Use of Lag Screws for Fractures of the Mandibular Body. J Oral Maxillofac Surg. 1996; 54: 1314-6.
  • 9
    Ramalho RA, Araújo FAC, Santos FSM, Caubi AF, Sobreira T. Management of the mandible fracture: miniplates and screws vs. lag screws - case report. Rev Cir Traumatol Buco-Maxilo-Facial. 2011; 11: 9-12.
  • 10
    Assael AL, Klotch WD, Manson NP, Prein J, Rahn AB, Schilli W. Manual of internal fixation in the cranio-facial skeleton. Berlin: Springer-Verlag; 1998.
  • 11
    Ellis III E. A study of 2 bone plating methods for fractures of the mandibular symphysis/body. J Oral Maxillofac Surg. 2011; 69: 1978-87.
  • 12
    Haug RH, Peterson GP, Goltz M. A biomechanical evaluation of mandibular condyle fracture plating techniques. J Oral Maxillofac Surg. 2002; 60: 73-80.
  • 13
    Ziccardi VB, Schneider RE, Kummer FJ, Wurzburg lag screw plate versus four hole miniplate for the treatment of condylar process fractures. J Oral Maxillofac Surg. 1997; 55: 602-7.
  • 14
    Ellis III E. Management of fractures through the angle of the mandible. Oral Maxillofacial Surg Clin N Am. 2009; 21: 163-74.
  • 15
    Kimsal J, Baack B, Candelaria L, Khraishi T, Lovald S. Biomechanical analysis of mandibular angle fractures. J Oral Maxillofac Surg. 2011; 69: 3010-4.

Publication Dates

  • Publication in this collection
    19 July 2013
  • Date of issue
    June 2013

History

  • Received
    26 Dec 2012
  • Accepted
    01 Apr 2013
Faculdade de Odontologia de Piracicaba - UNICAMP Avenida Limeira, 901, cep: 13414-903, Piracicaba - São Paulo / Brasil, Tel: +55 (19) 2106-5200 - Piracicaba - SP - Brazil
E-mail: brjorals@unicamp.br