title: Development plates for stable internal fixation: Study of mechanical resistance in simulated fractures of the mandibular condyle.
abstract: OBJECTIVE
  To develop Y-shaped plates with different thicknesses to be used in simulated fractures of the mandibular condyle. Ten plates were developed in Y shape, containing eight holes, and 30 synthetic polyurethane mandible replicas were developed for the study.
  
  
  METHODS
  The load test was performed on an Instron Model 4411 universal testing machine, applying load in the mediolateral and anterior-posterior positions on the head of the condyle. Two-way ANOVA with Tukey testing with a 5% significance level was used.
  
  
  RESULTS
  It was observed that when the load was applied in the medial-lateral plate of greater thickness (1.5 mm), it gave the highest strength, while in the anteroposterior direction, the plate with the highest resistance was of the lesser thickness (0.6 mm). A plate with a thickness of 1.5 mm was the one with the highest average value for all displacements. In the anteroposterior direction, the highest values of resistance were seen in the displacement of 15 mm.
  
  
  CONCLUSIONS
  After comparing the values of the biomechanical testing found in the scientific literature, it is suggested that the use of Y plates are suitable for use in subcondylar fractures within the limitations of the study.
authors.affiliation: Department of Dental Materials, School of Dentistry of Piracicaba, State University of Campinas (UNICAMP), Piracicaba, SP, Brazil.
authors.forename: Tóride Sebastião
authors.initials: TS
authors.lastname: Celegatti Filho
authors.affiliation: Department of Oral and Maxillofacial Surgery, School of Dentistry of Piracicaba, State University of Campinas (UNICAMP), Piracicaba, SP, Brazil.
authors.forename: Danillo Costa
authors.initials: DC
authors.lastname: Rodrigues
authors.affiliation: Department of Oral and Maxillofacial Surgery, School of Dentistry of Piracicaba, State University of Campinas (UNICAMP), Piracicaba, SP, Brazil. Electronic address: andrezzalauria@gmail.com.
authors.forename: Andrezza
authors.initials: A
authors.lastname: Lauria
authors.affiliation: Department of Oral and Maxillofacial Surgery, School of Dentistry of Piracicaba, State University of Campinas (UNICAMP), Piracicaba, SP, Brazil.
authors.forename: Roger William Fernandes
authors.initials: RW
authors.lastname: Moreira
authors.affiliation: Department of Dental Materials, School of Dentistry of Piracicaba, State University of Campinas (UNICAMP), Piracicaba, SP, Brazil.
authors.forename: Simonides
authors.initials: S
authors.lastname: Consani
mesh_terms: D001672:Biocompatible Materials / Q000737:chemistry; D001696:Biomechanical Phenomena; D001860:Bone Plates; D003799:Dental Stress Analysis / Q000295:instrumentation; D004867:Equipment Design; D005593:Fracture Fixation, Internal / Q000295:instrumentation*; D006801:Humans; D008335:Mandibular Condyle / Q000293:injuries* / Q000503:physiopathology; D008337:Mandibular Fractures / Q000503:physiopathology / Q000601:surgery*; D008953:Models, Anatomic; D011140:Polyurethanes / Q000737:chemistry; D013314:Stress, Mechanical; D013499:Surface Properties
chemical_list: D001672:Biocompatible Materials; D011140:Polyurethanes
keywords: Bone plates; Internal fixation of fractures; Mandibular condyle